Transient start solenoid valve based on remote control, solenoid valve start method

Abstract

The present invention discloses a transient start solenoid valve based on remote control and a solenoid valve start method. Its structural design is novel and helps to reduce the heat generation of the solenoid valve. The transient start solenoid valve based on remote control includes a valve body, electromagnets located on the left and right sides of the valve body, and a controller. Two amplifiers are connected to the controller, and the output ends of the two amplifiers are respectively connected to two coils. The controller receives a trigger signal and controls one of the amplifiers to increase the starting current and deliver the high current for instantaneous start to the coil, and the coil instantaneously drives the armature to push the push rod and the valve core to act; the solenoid valve start method includes the following steps: 1. The controller starts the amplifier to increase the starting current; 2. The amplifier delivers the instantaneous high current to the coil of the solenoid valve to instantaneously start the action of the armature.

Description

Technical Field

[0001] The present invention relates to a hydraulic electromagnetic directional control valve, and more particularly to a transient start solenoid valve based on remote control and a solenoid valve start method. Background Art

[0002] An electromagnetic directional control valve is an industrial device controlled by electricity magnetism. It is a basic automation component for controlling fluids and belongs to an actuator. Its application is not limited to hydraulics. It is used in industrial control systems to adjust parameters such as the direction, flow rate, speed, and others of the medium. The electromagnetic directional control valve can cooperate with different circuits to achieve the expected control.

[0003] Currently, the electromagnetic directional control valve generates a magnetic field through an internal electromagnet and drives the spool to move inside. Due to the usage environment of the electromagnetic directional control valve, the electromagnet inside the electromagnetic directional control valve needs to drive the spool to move frequently and repeatedly during use. The above-mentioned movement will generate heat due to factors such as the magnetic field and the movement of the spool over a long time (the fundamental reason is the heat generated due to the long time for the solenoid valve to drive the spool to move). After heating, it will affect the accuracy of the spool movement, the sealing performance between the spool and the channel, and the temperature performance of the overall performance, and ultimately affect the stability of the equipment operation. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, meet the actual needs, and provide a transient start solenoid valve based on remote control and a solenoid valve start method, with novel structural design and helpful for reducing the heat generation of the solenoid valve.

[0005] In order to achieve the purpose of the present invention, the technical solutions adopted by the present invention are as follows:

[0006] Disclose a transient start solenoid valve based on remote control, including a valve body, electromagnets located on the left and right sides of the valve body, a spool located inside the valve body, armatures located inside the two electromagnets respectively. A guide body is provided in the channel between the armature and the spool. A through guide hole is provided in the guide body. The front end of the spool is located in the guide hole, and a push rod is provided in the guide hole. One end of the push rod abuts against the end of the spool, and the other end of the push rod contacts the end of the armature. Coils are respectively provided on the two electromagnets. An oil inlet and an oil outlet are provided on the valve body. The oil outlet is located on the left and right sides inside the valve body;

[0007] It further includes a controller. Two amplifiers are connected to the controller. The output ends of the two amplifiers are respectively connected to the two coils. The controller receives a trigger signal and controls one of the amplifiers to increase the starting current and deliver the high current for instantaneous start to the coil, and the coil instantaneously drives the armature to push the push rod and the spool to act.

[0008] The amplifier includes a triode. The base of the triode is connected to the output port of the controller, the collector of the triode is connected to the power output terminal, and the source of the triode is connected to the coil therein.

[0009] A horizontal oil passage is provided at the top inside the valve body. The oil passage is communicated with the oil inlet, and the circuit board of the controller is closely attached to the top of the valve body.

[0010] A heat dissipation silica gel layer is provided between the circuit board and the valve body.

[0011] At least two first buffer channels symmetrical about the axis of the armature are provided on the armature. The first buffer channels penetrate through both ends of the armature.

[0012] At least two symmetrically arranged second buffer channels are provided in the guide body around the guide hole. The second buffer channels penetrate through both ends of the guide body and communicate the oil outlet with the channel inside the electromagnet.

[0013] A wireless receiving module is provided inside the controller.

[0014] Disclosed is a method for starting an electromagnetic valve, including the following steps:

[0015] (1) The controller starts the amplifier to increase the starting current;

[0016] (2) The amplifier delivers an instantaneous high current to the coil of the electromagnetic valve to instantaneously start the movement of the armature.

[0017] The beneficial effects of the present invention are as follows:

[0018] In this design, the movement of the valve core is started transiently. Compared with the smooth movement of the existing valve core, the movement time of the valve core in this design is greatly reduced. Through this transient starting method, the movement time of the valve core can be greatly saved, and the action time of the coil and the electromagnet can be reduced. During frequent actions, the heat generated during the commutation of the valve core can be reduced (eliminating the phenomenon of long driving time and easy heating of the existing electromagnet driving the valve core).

[0019] Therefore, based on the instantaneous starting method of this design, the problem of large heat generation during the operation of the current electromagnetic reversing valve can be solved. Through the research and implementation of this project, the technical innovation of the electromagnetic reversing valve product and its practical application in the field of automatic control can be achieved on various mechanical automation devices controlled by oil circuits currently. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the main structural schematic diagram of the present invention;

[0021] Figure 2 is the main electrical principle schematic diagram of the present invention;

[0022] Figure 3 Schematic diagram of the amplifier principle in the present invention;

[0023] Figure 4 Flowchart of the solenoid valve startup method in the present invention. Specific embodiments

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0025] Embodiment 1: A transient startup solenoid valve based on remote control, see Figures 1 to 3 .

[0026] It includes a valve body 1, electromagnets 13 located on the left and right sides of the valve body 1, a valve core 2 located inside the valve body 1, and armatures 4 respectively located inside the two electromagnets 13. A guide body 7 is provided in the channel between the armature 4 and the valve core 2. A through guide hole is provided inside the guide body. The front end of the valve core 2 is located inside the guide hole and is supported by the guide hole. A push rod 6 is also provided inside the guide hole. One end of the push rod 6 abuts against the end of the valve core 2, and the other end of the push rod 6 contacts the end of the armature. Coils are respectively provided on the two electromagnets 13. An oil inlet 2 and an oil outlet 8 are provided on the valve body. The oil outlet 8 is located on the left and right sides inside the valve body.

[0027] The above structure is the structure of an existing solenoid valve. In use, magnetic fields are respectively generated in the two electromagnets by the left and right coils to push the armature, and the armature drives the valve core to move left and right. In the above use of the existing valve core, the coils of the solenoid valve need to be frequently turned on and off during frequent operation, and heat will occur when the magnetic field generated by the coil and the electromagnet interacts with the movement of the armature. This phenomenon not only affects the flexibility of the valve core movement, but also affects the sealing performance between the valve bodies and the service life of the internal components of the valve body.

[0028] Secondly, in the use of the above solenoid valve, the guide body is fixed inside the valve body. Although the push rod, armature, and valve core adopt relatively independent structures, it is found in use that due to factors such as the viscosity of the hydraulic oil, the push rod is often stuck inside the guide body. Therefore, in this design, the guide body 7 is slidably installed in the channel connecting the valve body and the electromagnet, and the guide body can axially move inside the channel. In this way, the sliding of the guide body can not only prevent the push rod from getting stuck inside the guide body, but also avoid the backpressure phenomenon during the movement of the guide body, which helps to balance the pressure on both sides of the guide body.

[0029] Further, the present design also provides at least two first buffer channels 5 that are symmetric about the axis of the armature 13 on the armature 13. The first buffer channels 5 penetrate through both ends of the armature 13. Through the first buffer channels 5, the hydraulic oil on both sides of the armature can flow to balance the pressures on both sides, which helps the armature to start instantaneously at high speed. At the same time, it reduces the extrusion of the hydraulic oil when the armature moves, and avoids the phenomena of movement lag and jitter of the armature due to pressure imbalance.

[0030] Similar to the first buffer channels 5, the present design also provides at least two symmetrically arranged second buffer channels 7 in the guide body around the guide hole. The second buffer channels 7 penetrate through both ends of the guide body and connect the oil outlet with the channels inside the electromagnet. In this way, through the first buffer channels 5 and the second buffer channels 7, the channels on both sides of the armature can be connected to the oil outlet, which helps to balance the internal pressure and provides a stable pressure for the armature to start instantaneously at high speed.

[0031] Further, to reduce the phenomena of easy heating, slow movement, and lag of the spool in the prior art and to achieve the purpose of instantaneously high-speed starting of the spool, the present design also includes a controller. Two amplifiers are connected to the controller. The output ends of the two amplifiers are respectively connected to two coils. The controller is used to receive a trigger signal and control one of the amplifiers to increase the instantaneous starting current and transmit the high current of the instantaneous starting to the coil, and the coil instantaneously drives the armature to push the push rod and the spool to act in a short time. In this way, compared with the prior art, the present design can drive the spool to move in an extremely short time, improve the response speed of the spool, reduce the response between the coil and the electromagnet, and help to reduce the occurrence of heating phenomena.

[0032] In this embodiment, the amplifier can be a triode. The base of the triode is connected to the output port of the controller, the collector of the triode is connected to the power output end, and the emitter of the triode is connected to one of the coils. In this way, through the controller, the trigger current can be transmitted to the base of the triode to cause the triode to conduct, and then the current is amplified by the triode to achieve the purpose of instantaneous high-current starting.

[0033] In the present design, the circuit board 12 of the controller is arranged on the top of the valve 1, and a heat dissipation silica gel layer 11 is provided between the circuit board and the valve body. Since a circuit board is added to the valve body, the circuit board will form an easily heated component. Therefore, the present design provides a horizontally arranged oil passage 10 at the top inside the valve body. The oil passage is connected to the oil inlet 3. Since the hydraulic oil entering the oil inlet 3 has not yet entered the actuator, the hydraulic oil at the oil inlet 3 has not yet driven the actuator to act inside the actuator. Therefore, the hydraulic oil at the oil inlet 3 has a relatively low temperature and can enter the oil passage 10 to cool and dissipate heat from the top of the valve body and the circuit board above.

[0034] Further, a wireless receiving module may be provided in the controller of the present design. Through this wireless receiving module, wireless control signal transmission can be achieved to realize remote control.

[0035] Embodiment 2, a method for starting a solenoid valve. Refer to Figure 3 , this method is applied to the solenoid valve described in Embodiment 1, and it includes the following steps:

[0036] (1) The trigger signal is transmitted to the controller in a wireless or wired form, and the controller starts the amplifier to increase the starting current;

[0037] (2) The amplifier delivers the instantaneous high current to the coil of the solenoid valve to start the armature movement and drive the spool movement in an instantaneous and high-current manner.

[0038] In summary, in the present design, the spool movement is started transiently. Compared with the smooth movement of the existing spool, the spool movement time in the present design is greatly reduced. Through this transient starting method, the spool movement time can be greatly saved, and the coil and electromagnet action time can be reduced. During frequent operations, the heat generated during spool commutation can be reduced (eliminating the phenomenon of long driving time and easy heating of the existing electromagnet driving the spool).

[0039] Therefore, based on the instantaneous starting method of the present design, the problem of large heat generation during the operation of the current electromagnetic directional valve can be solved. Through the research and implementation of this project, the technical innovation of the electromagnetic directional valve product and its practical application in the field of automatic control can be promoted on various mechanical automation devices currently controlled by oil circuits.

[0040] The disclosed embodiments of the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A transient start solenoid valve based on remote control, comprising a valve body, electromagnets located on the left and right sides of the valve body, a valve core located inside the valve body, and armatures located inside the two electromagnets respectively. A guide body is provided in the channel between the armature and the valve core. A through guide hole is provided in the guide body. The front end of the valve core is located in the guide hole, and a push rod is provided in the guide hole. One end of the push rod abuts against the end of the valve core, and the other end of the push rod contacts the end of the armature. Coils are respectively provided on the two electromagnets. An oil inlet and an oil outlet are provided on the valve body, and the oil outlet is located on the left and right sides inside the valve body; It is characterized in that: It further includes a controller. Two amplifiers are connected to the controller. The output ends of the two amplifiers are respectively connected to the two coils. The controller receives a trigger signal and controls one of the amplifiers to increase the starting current and deliver the high current for instantaneous start to the coil, and the coil instantaneously drives the armature to push the push rod and the valve core to act; The amplifier includes a triode. The base of the triode is connected to the output port of the controller. The collector of the triode is connected to the power output end. The source of the triode is connected to one of the coils; A horizontally arranged oil passage is provided at the top inside the valve body. The oil passage is communicated with the oil inlet. The circuit board of the controller is closely attached to the top of the valve body; A heat dissipation silica gel layer is provided between the circuit board and the valve body; At least two first buffer channels symmetrical about the axis of the armature are provided on the armature. The first buffer channels penetrate through both ends of the armature; At least two symmetrically arranged second buffer channels are provided in the guide body around the guide hole. The second buffer channels penetrate through both ends of the guide body and communicate the oil outlet with the channel inside the electromagnet; A wireless receiving module is provided inside the controller; The guide body is slidably installed in the channel where the valve body is communicated with the electromagnet.

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