Manual-automatic integrated high-pressure electromagnetic valve with long service life

Abstract

The invention relates to the technical field of high-pressure electromagnetic valves, in particular to a manual-automatic integrated long-service-life high-pressure electromagnetic valve which comprises an electromagnetic valve body, a piston cavity is formed in the bottom of the electromagnetic valve body, an output cavity communicating with the piston cavity is formed in the piston cavity, and a pilot valve port is formed in the top of the electromagnetic valve body. The pilot valve port is communicated with the output cavity through an air channel, a pilot hole is formed in the electromagnetic valve body, the top end and the bottom end of the pilot hole are communicated with the pilot valve port and the output cavity through air channels respectively, a pilot valve is installed on the side face of the electromagnetic valve body in a penetrating mode, and one end of the pilot valve extends into the pilot hole in a matched mode. According to the scheme, the piston can slide in the piston cavity conveniently, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure solenoid valves, and in particular to a manual-automatic high-pressure solenoid valve with a long service life. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulics or pneumatics. They are generally 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, thereby ensuring the accuracy and flexibility of solenoid valve control.

[0003] When the air pressure in the solenoid valve is too low, the pressure in the cavity above the piston in the piston chamber is lower than the pressure in the cavity below, which causes the piston to move poorly, resulting in blockage or jamming of the piston, and increased wear of the seal. After the piston is worn, the sealing between it and the piston chamber is reduced, making it impossible for the solenoid valve to work stably, thereby shortening the life of the solenoid valve. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a manual-automatic integrated high-pressure solenoid valve with a long life.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a manual and automatic high-life high-pressure solenoid valve, comprising a solenoid valve body, a piston chamber is provided at the bottom of the solenoid valve body, an output chamber connected to the piston chamber is provided inside the piston chamber, a pilot valve port is provided at the top of the solenoid valve body, the pilot valve port and the output chamber are connected through an airway, a pilot hole is provided inside the solenoid valve body, the top and bottom ends of the pilot hole are connected to the pilot valve port and the output chamber respectively through the airway, a pilot valve is installed through the side of the solenoid valve body, one end of the pilot valve is matched and extends into the pilot hole, a piston mechanism matched and connected to the inside of the output chamber is provided at the bottom of the solenoid valve body, and an electromagnetic mechanism corresponding to the position of the pilot valve port is provided at the top of the solenoid valve body.

[0006] Preferably, the piston mechanism includes a base, which is installed on the bottom of the solenoid valve body, a deep hole is opened on the top of the base, a piston is provided above the base, the piston is matched and arranged inside the piston cavity, a stepped piston rod is installed at the bottom of the piston, the stepped piston rod extends into the deep hole, a damping spring is provided on the surface of the stepped piston rod, two ends of the damping spring are respectively installed on the surface of the deep hole and the step surface of the stepped piston rod, and neodymium iron boron is embedded in the bottom of the stepped piston rod.

[0007] Preferably, a Hall-effect induction valve position indicator is embedded in the bottom of the base, and the detection end of the Hall-effect induction valve position indicator corresponds to the position of the stepped piston rod.

[0008] Preferably, the electromagnetic mechanism includes a shell, which is installed on the top of the electromagnetic valve body, a static armature is fixedly installed on the inner top surface of the shell, a movable armature is elastically connected below the static armature, an electromagnetic assembly is sleeved between the surfaces of the static armature and the movable armature, the bottom end of the movable armature extends to the inside of the pilot valve port, a sealing rubber block is bonded to the bottom of the movable armature, and the sealing rubber block seals the airway opening between the pilot valve port and the output chamber.

[0009] Preferably, a deep groove is formed on the top of the movable armature, a compression spring is installed inside the deep groove, and the top end of the compression spring is installed on the bottom of the static armature.

[0010] Preferably, the electromagnetic assembly is composed of an electromagnetic coil and an I-shaped pipe fitting, the top of the I-shaped pipe fitting is installed on the inner top surface of the shell, and the static armature and the movable armature are located in the inner hole of the I-shaped pipe fitting.

[0011] Preferably, a pressure transmitter is embedded in the side of the solenoid valve body, and the pressure transmitter is connected to the output chamber through an air passage.

[0012] Preferably, an input port communicating with the output chamber is formed on a side surface of the solenoid valve body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this solution, a pilot hole is opened in the solenoid valve body. When the piston moves downward, the pilot hole can provide the pressure in the cavity below the piston in the piston chamber, which is transmitted to the cavity above the piston through the pilot hole. At this time, the pressure of the cavity above the piston is greater than the pressure of the cavity below the piston, which facilitates the sliding of the piston in the piston chamber and extends the service life of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric diagram of a manual-automatic integrated high-life high-pressure solenoid valve of the present invention;

[0016] Figure 2 It is a first cross-sectional view of a manual-automatic integrated high-life high-pressure solenoid valve of the present invention;

[0017] Figure 3 It is a second cross-sectional view of a manual-automatic integrated high-life high-pressure solenoid valve of the present invention;

[0018] Figure 4 The figure is a schematic diagram of the connection structure of the piston and NdFeB of a manual-automatic high-life high-pressure solenoid valve of the present invention.

[0019] In the figure: housing 1, static armature 2, electromagnetic assembly 3, moving armature 4, pilot hole 5, output chamber 6, piston chamber 7, base 8, damping spring 9, compression spring 10, solenoid valve body 11, piston 12, pilot valve port 13, input port 14, NdFeB 15, pilot valve 16, pressure transmitter 17, Hall induction valve position indicator 18. DETAILED DESCRIPTION

[0020] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] like Figure 1-4 The manual and automatic high-life high-pressure solenoid valve shown in the figure comprises a solenoid valve body 11, a piston chamber 7 is provided at the bottom of the solenoid valve body 11, an output chamber 6 connected to the piston chamber 7 is provided inside the piston chamber 7, a pilot valve port 13 is provided at the top of the solenoid valve body 11, the pilot valve port 13 and the output chamber 6 are connected through an air passage, a pilot hole 5 is provided inside the solenoid valve body 11, the top and bottom ends of the pilot hole 5 are respectively connected to the pilot valve port 13 and the output chamber 6 through the air passage, and the external high-pressure air pressure enters the output chamber 6 through the input port 14 In the process, after the electromagnetic coil is powered off, the moving armature 4 blocks the pilot valve port 13, and the high pressure in the output chamber 6 is transmitted to the piston chamber 7 above the piston 12, so that the piston 12 can move downward. As the piston 12 continues to move, the space in the piston chamber 7 below the piston 12 is gradually squeezed, and the air pressure in the piston chamber 7 below the piston 12 is transmitted to the pilot hole 5, and the air pressure is transmitted to the output chamber 6 through the pilot hole 5. The air pressure in the output chamber 6 is transmitted to the piston chamber 7 above the piston 12. After the piston 12 has completed its downward movement, the electromagnetic valve is in a passage state.

[0022] A pilot valve 16 is installed through the side of the solenoid valve body 11, and one end of the pilot valve 16 extends into the pilot hole 5. The pilot valve 16 is used to control the on and off of the air pressure in the pilot hole 5. When the pilot valve 16 is in an open state, the pilot hole 5 can provide air pressure for circulation, and the piston 12 moves up or down at this time. When the pilot valve 16 is in a closed state, the pilot hole 5 blocks the circulation of air pressure, which is used to improve the stability of the position of the piston 12, thereby improving the stability of the solenoid valve body 11 in the off-circuit state. The pilot valve 16 can be manually operated, which is convenient for the downward movement of the piston 12 when the solenoid valve is powered off.

[0023] The bottom of the solenoid valve body 11 is provided with a piston mechanism that is matched and connected with the inside of the output chamber 6. The piston mechanism includes a base 8, which is installed at the bottom of the solenoid valve body 11. A deep hole is opened on the top of the base 8. A piston 12 is provided above the base 8. The piston 12 is matched and placed inside the piston chamber 7. A stepped piston rod is installed at the bottom of the piston 12. The stepped piston rod extends into the deep hole. A damping spring 9 is sleeved on the surface of the stepped piston rod. The two ends of the damping spring 9 are respectively installed on the surface of the deep hole and the stepped surface of the stepped piston rod. A neodymium iron boron 15 is embedded at the bottom of the stepped piston rod. A Hall-sensing valve position indicator 18 is embedded at the bottom of the base 8. The detection end of the Hall-sensing valve position indicator 18 corresponds to the position of the stepped piston rod. The medium pressure of this valve is 70 MPa. When the piston 12 opens, the bottom 8 receives the impact force of the piston 12. The impact force of the piston 12 is applied to the damping spring through the stepped piston rod. The reaction force generated during the shortening of the damping spring is used to reduce the impact strength of the piston 12, thereby protecting the piston 12 and further extending the service life of the piston 12. When the piston 12 moves downward, the neodymium iron boron 15 at the lower end of the piston 12 enters the sensing distance of the Hall-sensing valve position indicator 18. At this time, the Hall-sensing valve position indicator 18 sends a valve opening signal to control the opening of the pilot valve 16. At this time, the pilot hole 5 can provide air pressure flow, which facilitates the air pressure below the air to be transported to the output chamber 6 through the pilot hole 5 during the downward movement of the piston 12.

[0024] An electromagnetic mechanism corresponding to the position of the pilot valve port 13 is provided at the top of the solenoid valve body 11. The electromagnetic mechanism includes a shell 1, which is installed on the top of the solenoid valve body 11. A static armature 2 is fixedly installed on the inner top surface of the shell 1, and a moving armature 4 is elastically connected to the bottom of the static armature 2. An electromagnetic assembly 3 is sleeved between the surfaces of the static armature 2 and the moving armature 4. The bottom end of the moving armature 4 extends to the inside of the pilot valve port 13. A sealing rubber block is bonded to the bottom of the moving armature 4. The sealing rubber block blocks the airway port between the pilot valve port 13 and the output chamber 6. When the electromagnetic assembly 3 is energized, the moving armature 4 moves upward and is attracted to the static armature 2. At this time, the sealing rubber block moves away from the airway port. At this time, the pilot valve port 13 is opened, so that the pressure of the piston chamber 7 below the piston 12 is discharged to the output chamber 6, and the pressure of the output chamber 6 will be transmitted to the top of the piston. The pressure of the piston chamber 7 above the piston 12 is greater than the pressure of the piston chamber 7 below the piston. The piston 12 moves downward under the action of the air pressure, which is used to balance the air pressure balance operation in the solenoid valve.

[0025] A deep groove is provided on the top of the movable armature 4, and a compression spring 10 is installed inside the deep groove. The top end of the compression spring 10 is installed at the bottom of the stationary armature 2. When the movable armature 4 is attracted by the stationary armature 2, the compression spring 10 is squeezed by the movable armature 4 and its length shrinks. After the magnetic force between the stationary armature 2 and the movable armature 4 disappears, the compression spring 10 pushes the movable armature 4 in the direction of its own elastic potential energy, thereby facilitating the resetting of the movable armature 4.

[0026] The electromagnetic assembly 3 is composed of an electromagnetic coil and an I-shaped pipe fitting. The top of the I-shaped pipe fitting is installed on the inner top surface of the shell 1. The static armature 2 and the movable armature 4 are located in the inner hole of the I-shaped pipe fitting. When the electromagnetic coil is energized, a magnetic field is generated. The magnetic field can attract the static armature 2 and the movable armature 4. When the electromagnetic coil is powered off, the magnetic field disappears, and the static armature 2 and the movable armature 4 are separated.

[0027] A pressure transmitter 17 is embedded in the side of the solenoid valve body 11. The pressure transmitter 17 and the output chamber 6 are connected through an air passage. The pressure transmitter 17 and the solenoid valve body 11 are sealed so that the pressure transmitter 17 can detect the air pressure in the solenoid valve.

[0028] An input port 14 communicating with the output chamber 6 is provided on the side of the solenoid valve body 11 . The input port 14 is used to connect to a high-pressure air pressure device so that the high-pressure air pressure can be input into the solenoid valve.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A manual-automatic high-life high-pressure solenoid valve, comprising a solenoid valve body (11), characterized in that: The solenoid valve body (11) is provided with a piston chamber (7) at the bottom, and an output chamber (6) communicating with the piston chamber (7) is provided inside the piston chamber (7). The solenoid valve body (11) is provided with a pilot valve port (13) at the top, and the pilot valve port (13) and the output chamber (6) are connected via an air passage. The solenoid valve body (11) is provided with a pilot hole (5) inside, and the top and bottom ends of the pilot hole (5) are respectively connected with the pilot valve port (13) and the output chamber (6) via an air passage. A pilot valve (16) is installed through the side of the solenoid valve body (11), and one end of the pilot valve (16) is matched to extend into the pilot hole (5). The bottom of the solenoid valve body (11) is provided with a piston mechanism matched to communicate with the inside of the output chamber (6), and the top of the solenoid valve body (11) is provided with an electromagnetic mechanism corresponding to the position of the pilot valve port (13).

2. The manual and automatic high-life high-pressure solenoid valve according to claim 1 is characterized in that: The piston mechanism comprises a base (8), wherein the base (8) is mounted on the bottom of the electromagnetic valve body (11), a deep hole is formed on the top of the base (8), a piston (12) is arranged above the base (8), the piston (12) is matched and arranged inside the piston cavity (7), a stepped piston rod is mounted on the bottom of the piston (12), the stepped piston rod extends into the deep hole, a damping spring (9) is sleeved on the surface of the stepped piston rod, the two ends of the damping spring (9) are respectively mounted on the surface of the deep hole and the stepped surface of the stepped piston rod, and a neodymium iron boron (15) is embedded on the bottom of the stepped piston rod.

3. The manual and automatic high-life high-pressure solenoid valve according to claim 2 is characterized in that: A Hall-effect inductive valve position indicator (18) is embedded in the bottom of the base (8), and a detection end of the Hall-effect inductive valve position indicator (18) corresponds to the position of the stepped piston rod.

4. The manual and automatic high-life high-pressure solenoid valve according to claim 1 is characterized in that: The electromagnetic mechanism comprises a shell (1), wherein the shell (1) is mounted on the top of the electromagnetic valve body (11), a static armature (2) is fixedly mounted on the inner top surface of the shell (1), a movable armature (4) is elastically connected below the static armature (2), an electromagnetic assembly (3) is sleeved between the surfaces of the static armature (2) and the movable armature (4), the bottom end of the movable armature (4) extends to the inside of the pilot valve port (13), a sealing rubber block is bonded to the bottom of the movable armature (4), and the sealing rubber block seals the airway port between the pilot valve port (13) and the output chamber (6).

5. The manual and automatic high-life high-pressure solenoid valve according to claim 4 is characterized in that: A deep groove is provided on the top of the movable armature (4), a compression spring (10) is installed inside the deep groove, and the top end of the compression spring (10) is installed on the bottom of the stationary armature (2).

6. The manual-automatic high-pressure solenoid valve with long service life according to claim 4 is characterized in that: The electromagnetic assembly (3) is composed of an electromagnetic coil and an I-shaped pipe fitting, the top of the I-shaped pipe fitting is installed on the inner top surface of the housing (1), and the static armature (2) and the movable armature (4) are located in the inner hole of the I-shaped pipe fitting.

7. The manual-automatic high-pressure solenoid valve with long service life according to claim 1 is characterized in that: A pressure transmitter (17) is embedded in the side of the electromagnetic valve body (11), and the pressure transmitter (17) and the output chamber (6) are connected via an air passage.

8. The manual-automatic high-pressure solenoid valve with long service life according to claim 1, characterized in that: An input port (14) communicating with the output chamber (6) is provided on the side of the solenoid valve body (11).

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