Plane coil type nozzle baffle electromagnetic pilot valve

Abstract

The utility model discloses a planar coil type nozzle baffle electromagnetic pilot valve which comprises a pilot valve body, a planar coil PCB assembly, a lever assembly, an installation support and a magnet. A magnet is fixedly connected to the plane of the mounting bracket, and a lever assembly is arranged on the wall surface of the mounting bracket; the planar coil PCB assembly comprises a baffle PCB and a PCB fixing support, the planar coil PCB on the baffle PCB is arranged above the magnet, and the planar coil PCB and the magnet are concentrically arranged; the lever assembly is fixedly connected with the baffle PCB through the PCB fixing support. The side wall of the pilot valve body is fixedly connected with the mounting support, and an air outlet nozzle is arranged on the lower side of the pilot valve body and located above the baffle PCB. The plane coil type nozzle baffle electromagnetic pilot valve has the advantages of being simple in structure, convenient and fast to assemble and higher in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic pilot valves, in particular to a plane coil type nozzle baffle electromagnetic pilot valve. Background Art

[0002] Valve positioners are important terminal actuator units in industrial control links. They are mostly used in applications with complex external environments and high flow accuracy requirements. Their control performance level largely determines the stability and production efficiency of industrial production and applications. Valve positioners play an important role in industrial process control. As a key device representing Industry 4.0 and valve digitalization, valve positioners are not only related to the product quality and energy efficiency of process control, but also to the security of valve data in my country. The pneumatic components of valve positioners generally consist of two parts: a current / pressure converter and a pneumatic amplifier. The current / pressure converter is a small device that converts current signals into pressure signals. Generally, two technologies are used: one is based on the principle of inverse piezoelectric effect; the other is based on electromagnetic principles and nozzle baffle mechanisms. The electromagnetic pilot valve is one of the core components of the valve positioner. With the electromagnetic torque motor, it can realize the conversion between lower current and higher pressure. Its performance directly determines the quality of the valve positioner's frequency response, dynamic characteristics, static characteristics and other performance.

[0003] However, the existing electromagnetic pilot valve has the following defects: the conventional electromagnetic pilot valve uses a hollow self-adhesive coil, which is installed by gluing it to the baffle, and welding the two leads of the hollow self-adhesive coil to the pads on the back of the baffle. In production, auxiliary tools are required to accurately fix the position of the coil, and the leads are easily welded in reverse, resulting in failure in inspection. In addition, the conventional electromagnetic pilot valve structure requires a magnetic shell to constrain the magnetic field, and the shell has high processing precision requirements and high costs. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a planar coil type nozzle baffle electromagnetic pilot valve, which has the characteristics of simple structure, convenient assembly and improved production efficiency.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a planar coil nozzle flapper electromagnetic pilot valve, comprising: a pilot valve body, a planar coil PCB assembly, a lever assembly, a mounting bracket and a magnet;

[0006] A magnet is fixedly connected on the plane of the mounting bracket, and a lever assembly is provided on the wall surface of the mounting bracket;

[0007] The planar coil PCB assembly comprises: a baffle PCB and a PCB fixing bracket, the planar coil PCB on the baffle PCB is arranged above the magnet, and the planar coil PCB and the magnet are arranged concentrically; the lever assembly is fixedly connected to the baffle PCB through the PCB fixing bracket;

[0008] The side wall of the pilot valve body is fixedly connected to the mounting bracket, and an air outlet nozzle is arranged on the lower side of the pilot valve body, and the air outlet nozzle is located above the baffle PCB.

[0009] Furthermore, the planar coil PCB on the baffle PCB has 6 layers, each layer has 500 turns, and each layer is a spiral wire with a wire diameter of 4 mil and a wire spacing of 4 mil.

[0010] Furthermore, the planar coil PCB assembly is also provided with an XH1.25 plug-in terminal, and the XH1.25 plug-in terminal is connected to two connectors of the spiral wire.

[0011] Furthermore, the planar coil PCB assembly also includes a counterweight block, which is arranged on the lower side of the front end of the baffle PCB, and the counterweight block and the baffle PCB are fixedly connected through the counterweight block mounting hole, and the bottom of the configuration block is at the same height as the bottom of the mounting bracket.

[0012] Furthermore, the lever assembly includes: an optical axis and miniature bearing mounting seats arranged at both ends of the optical axis, the optical axis is sleeved in the circular hole of the PCB fixing bracket through a miniature bearing, the miniature bearing mounting seat is fixedly connected to the wall surface of the mounting bracket through fixing screws, and the miniature bearing mounting seat is connected to the optical axis through a miniature bearing.

[0013] Furthermore, the PCB fixing bracket is fixedly connected to the baffle PCB via hollow rivets.

[0014] Furthermore, the side wall of the pilot valve body is fixedly connected to the mounting bracket via mounting bracket fixing screws.

[0015] Furthermore, the pilot valve body includes: a back pressure chamber, a cavity, a piston, a first O-ring, an intake nozzle, an intake check valve and an intake hole, a straight-through end on one side of the back pressure chamber is provided with an outlet nozzle, and the other straight-through end of the back pressure chamber is connected to the cavity, and a piston is provided in the cavity; an intake nozzle is provided at the tap end of the back pressure chamber, a first O-ring is provided around the outlet of the intake nozzle, and the intake nozzle is connected to the intake hole through the intake check valve.

[0016] Furthermore, the piston is connected to a subsequent pneumatic amplifier, and the air inlet is connected to an air source.

[0017] Furthermore, the intake check valve comprises: an intake check valve base, a spring, a check valve core, a second O-ring and an intake check valve top cover, the check valve core is arranged between the intake check valve base and the intake check valve top cover, a spring is sleeved on the check valve core, one end of the spring is in contact with the check valve core, and the other end of the spring is in contact with the inner wall of the intake check valve base; the check valve core is provided with a mounting groove for a second O-ring, the mounting groove is used to install the second O-ring, and the second O-ring is fastened by the intake check valve top cover.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the flat coil nozzle baffle electromagnetic pilot valve of the utility model replaces the self-adhesive hollow coil with a flat coil PCB, thereby eliminating the design of the magnetic conductive shell required for the self-adhesive hollow coil, making the structure of the nozzle baffle electromagnetic pilot valve simpler, which is conducive to the integration of the pilot valve module, and the impedance of the flat coil is smaller, the required power consumption is low, and it is suitable for intelligent valve positioners with low power consumption requirements; because the spiral line center of the flat coil PCB is connected to the XH1.25 plug-in terminal, the self-adhesive hollow coil welding wire operation is eliminated, and the situation that the coil lead is welded in reverse so that the baffle moves in the wrong direction is avoided, thereby improving production efficiency and qualification; in addition, the utility model realizes the rotational movement of the flat coil PCB under the action of the magnet through a lever assembly, thereby changing the distance between the flat coil PCB and the air outlet nozzle in the pilot valve body, and the air pressure released by the air outlet nozzle changes the air pressure in the back pressure chamber, thereby driving the piston to move, and then driving the subsequent pneumatic amplifier to make corresponding movements. Therefore, the planar coil nozzle baffle electromagnetic pilot valve of the utility model has the characteristics of simple structure, convenient assembly and higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the flat coil nozzle baffle electromagnetic pilot valve of the utility model from one viewing angle;

[0020] Figure 2 It is a cross-sectional view of the flat coil type nozzle baffle electromagnetic pilot valve of the utility model;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the flat coil nozzle baffle electromagnetic pilot valve of the utility model from another perspective;

[0022] Figure 4 It is a top schematic diagram of the planar coil PCB in the utility model;

[0023] Figure 5 It is a cross-sectional view of the pilot valve body of the utility model;

[0024] Among them, 1. counterweight, 2. baffle PCB, 3. PCB fixing bracket, 4. XH1.25 plug-in terminal, 5. magnet, 6. mounting bracket, 7. optical axis, 8. miniature bearing mounting seat, 9. miniature bearing, 10. fixing screws, 11. hollow rivets, 12. mounting bracket fixing screws, 13. pilot valve body, 14. back pressure chamber, 15. cavity, 16. piston, 17. first O-ring, 18. intake nozzle, 19. intake hole, 20. outlet nozzle, 21. intake check valve base, 22. spring, 23. check valve core, 24. second O-ring, 25. intake check valve top cover, 26. set screws. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings.

[0026] like Figure 1-3 The utility model provides a planar coil nozzle baffle electromagnetic pilot valve, comprising: a pilot valve body 13, a planar coil PCB assembly, a lever assembly, a mounting bracket 6 and a magnet 5; the magnet 5 is fixedly connected to the plane of the mounting bracket 6 by a set screw 26, and a lever assembly is provided on the wall of the mounting bracket 6; the planar coil PCB assembly comprises: a baffle PCB2 and a PCB fixing bracket 3, the PCB fixing bracket 3 is fixedly connected to the baffle PCB2 by a hollow rivet 11, the planar coil PCB on the baffle PCB2 is arranged above the magnet 5, and the planar coil PCB and the magnet 5 are arranged concentrically; the lever assembly is fixedly connected to the baffle PCB2 through the PCB fixing bracket 3; the side wall of the pilot valve body 13 is fixedly connected to the mounting bracket 6, specifically, the side wall of the pilot valve body 13 is fixedly connected to the mounting bracket 6 by the mounting bracket fixing screws 12, and an air outlet nozzle 20 is provided on the lower side of the pilot valve body 13, and the air outlet nozzle 20 is located above the baffle PCB2. The utility model realizes the rotational movement of the baffle PCB2 under the action of the magnet 5 through the lever assembly, thereby changing the distance between the planar coil PCB and the air outlet nozzle 20 in the pilot valve body 13, and the air pressure released by the air outlet nozzle 20 changes the air pressure in the back pressure chamber 14, thereby pushing the piston 16 to move, and then pushing the subsequent pneumatic amplifier to make corresponding movements. Therefore, the planar coil nozzle baffle electromagnetic pilot valve of the utility model has the characteristics of simple structure, convenient assembly, and higher practicality.

[0027] like Figure 4The number of layers of the planar coil PCB on the baffle PCB2 in the utility model is 6, the number of turns of each layer is 500, and each layer is a spiral wire with a wire diameter of 4 mil and a wire spacing of 4 mil. The planar coil PCB in the utility model replaces the self-adhesive hollow coil, eliminating the design of the magnetic conductive shell required for the self-adhesive hollow coil, making the structure of the nozzle baffle type electromagnetic pilot valve simpler, which is conducive to the integration of the pilot valve module, and the impedance of the planar coil is smaller, the required power consumption is low, and it is suitable for intelligent valve positioners with low power consumption requirements.

[0028] The planar coil PCB assembly is also provided with an XH1.25 plug-in terminal 4, which is connected to the two connectors of the spiral wire, eliminating the need for self-adhesive hollow coil welding wire operations and avoiding the situation where the coil lead is welded in reverse, causing the baffle to move in the wrong direction, thereby improving production efficiency and qualification.

[0029] The planar coil PCB assembly in the present invention also includes a counterweight block 1, which is arranged on the lower side of the front end of the baffle PCB2. The counterweight block 1 and the baffle PCB2 are fixedly connected through the counterweight block mounting hole. The bottom of the counterweight block 1 is at the same height as the bottom of the mounting bracket 6, thereby ensuring that the baffle PCB2 remains horizontal when it is not subjected to the repulsive force of the magnet 5, thereby avoiding damage to the air outlet nozzle 20.

[0030] The lever assembly in the utility model includes: an optical axis 7 and a micro bearing mounting seat 8 arranged at both ends of the optical axis 7, the optical axis 7 is sleeved in the circular hole of the PCB fixing bracket 3 through a micro bearing 9, the micro bearing mounting seat 8 is fixedly connected to the wall surface of the mounting bracket 6 through a fixing screw 10, and the micro bearing mounting seat 8 is connected to the optical axis 7 through a micro bearing 9. When the planar coil PCB is energized through the XH1.25 plug-in terminal 4, the baffle PCB2 is subjected to the repulsive force of the magnet 5, and the baffle PCB2 reduces the distance from the air outlet nozzle 20 through a rotational motion, and the rotational motion of the baffle PCB2 is transmitted to the optical axis 7 through the micro bearing 9, so that the optical axis 7 rotates.

[0031] like Figure 5The pilot valve body 13 of the utility model includes: a back pressure chamber 14, a cavity 15, a piston 16, a first O-ring 17, an air intake nozzle 18, an air intake check valve and an air intake hole 19. A straight-through end on one side of the back pressure chamber 14 is provided with an air outlet nozzle 20, and the straight-through end on the other side of the back pressure chamber 14 is connected to the cavity 15. A piston 16 is provided in the cavity 15, and the piston 16 is connected to the rear-stage pneumatic amplifier; an air intake nozzle 18 is provided at the tap end of the back pressure chamber 14, and a first O-ring 17 is provided around the outlet of the air intake nozzle 18. The air intake nozzle 18 is connected to the air intake hole 19 through the air intake check valve, and the air intake hole 19 is connected to the air source. The air intake check valve comprises: an air intake check valve base 21, a spring 22, a check valve core 23, a second O-type sealing ring 24 and an air intake check valve top cover 25. The check valve core 23 is arranged between the air intake check valve base 21 and the air intake check valve top cover 25. The spring 22 is sleeved on the check valve core 23. One end of the spring 22 contacts the check valve core 23, and the other end of the spring 22 contacts the inner wall of the air intake check valve base 21. The check valve core 23 is provided with an installation groove for the second O-type sealing ring 24, and the installation groove is used to install the second O-type sealing ring 24. The second O-type sealing ring 24 is fastened by the air intake check valve top cover 25.

[0032] The working process of the flat coil nozzle baffle electromagnetic pilot valve of the utility model is as follows: since the air inlet 19 is connected to the air source, the air source pressure is provided to the back pressure chamber 14 of the pilot valve body 13, and the current on the flat coil PCB determines the degree of opening and closing of the air circuit. The current of the flat coil PCB is gradually increased through the XH1.25 plug-in terminal 4. At this time, the repulsive force between the flat coil PCB and the magnet 5 increases, so that the distance between the baffle PCB2 and the air outlet nozzle 20 of the pilot valve body 13 is reduced, so that the air pressure released from the air outlet nozzle 20 is smaller. At this time, the air pressure in the back pressure chamber 14 is larger, and the air pressure in the back pressure chamber 14 pushes The piston 16 moves upward, and the piston 16 is connected to the subsequent pneumatic amplifier, thereby pushing the subsequent pneumatic amplifier to make corresponding movements; when the current of the planar coil PCB is gradually reduced through the XH1.25 plug-in terminal 4, at this time, the repulsive force between the planar coil PCB and the magnet 5 is reduced, so that the distance between the baffle PCB2 and the air outlet nozzle 20 of the pilot valve body 13 is increased, so that the air pressure released from the air outlet nozzle 20 is larger, and at this time, the air pressure in the back pressure chamber 14 is smaller, and the air pressure in the back pressure chamber 14 pushes the piston 16 to move downward, and the piston 16 is connected to the subsequent pneumatic amplifier, thereby pushing the subsequent pneumatic amplifier to make corresponding movements.

[0033] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A planar coil type nozzle flapper electromagnetic pilot valve, characterized in that: include: A pilot valve body (13), a planar coil PCB assembly, a lever assembly, a mounting bracket (6), and a magnet (5); A magnet (5) is fixedly connected to a plane of the mounting bracket (6), and a lever assembly is provided on a wall surface of the mounting bracket (6); The planar coil PCB assembly comprises: a baffle PCB (2) and a PCB fixing bracket (3); the planar coil PCB on the baffle PCB (2) is arranged above the magnet (5), and the planar coil PCB and the magnet (5) are arranged concentrically; the lever assembly is fixedly connected to the baffle PCB (2) via the PCB fixing bracket (3); The side wall of the pilot valve body (13) is fixedly connected to the mounting bracket (6); an air outlet nozzle (20) is provided on the lower side of the pilot valve body (13); and the air outlet nozzle (20) is located above the baffle PCB (2).

2. A planar coil type nozzle flapper electromagnetic pilot valve according to claim 1, characterized in that: The number of layers of the planar coil PCB on the baffle PCB (2) is 6, the number of turns of each layer is 500, and each layer is a spiral wire with a wire diameter of 4 mil and a wire spacing of 4 mil.

3. A planar coil type nozzle flapper electromagnetic pilot valve according to claim 2, characterized in that: The planar coil PCB assembly is also provided with an XH1.25 straight plug terminal (4), and the XH1.25 straight plug terminal (4) is connected to two connectors of the spiral wire.

4. A planar coil type nozzle flapper electromagnetic pilot valve according to claim 3, characterized in that: The planar coil PCB assembly further comprises a counterweight (1), wherein the counterweight (1) is arranged at the lower side of the front end of the baffle PCB (2), the counterweight (1) and the baffle PCB (2) are fixedly connected via the counterweight mounting hole, and the bottom of the counterweight (1) is at the same height as the bottom of the mounting bracket (6).

5. The planar coil nozzle flapper electromagnetic pilot valve according to claim 1, characterized in that: The lever assembly comprises: an optical axis (7) and miniature bearing mounting seats (8) arranged at both ends of the optical axis (7); the optical axis (7) is sleeved in a circular hole of a PCB fixing bracket (3) via miniature bearings (9); the miniature bearing mounting seat (8) is fixedly connected to a wall surface of the mounting bracket (6) via fixing screws (10); and the miniature bearing mounting seat (8) is connected to the optical axis (7) via miniature bearings (9).

6. A planar coil type nozzle flapper electromagnetic pilot valve according to claim 5, characterized in that: The PCB fixing bracket (3) is fixedly connected to the baffle PCB (2) via a hollow rivet (11).

7. The planar coil nozzle flapper electromagnetic pilot valve according to claim 1, characterized in that: The side wall of the pilot valve body (13) is fixedly connected to the mounting bracket (6) via mounting bracket fixing screws (12).

8. The planar coil nozzle flapper electromagnetic pilot valve according to claim 1, characterized in that: The pilot valve body (13) comprises: a back pressure chamber (14), a cavity (15), a piston (16), a first O-ring (17), an air intake nozzle (18), an air intake check valve and an air intake hole (19); a straight-through end on one side of the back pressure chamber (14) is provided with an air outlet nozzle (20); the straight-through end on the other side of the back pressure chamber (14) is connected to the cavity (15); a piston (16) is provided in the cavity (15); an air intake nozzle (18) is provided at the tap end of the back pressure chamber (14); a first O-ring (17) is provided around the outlet of the air intake nozzle (18); and the air intake nozzle (18) is connected to the air intake hole (19) via the air intake check valve.

9. A planar coil type nozzle flapper electromagnetic pilot valve according to claim 8, characterized in that: The piston (16) is connected to a subsequent pneumatic amplifier, and the air inlet (19) is connected to an air source.

10. The planar coil nozzle flapper electromagnetic pilot valve according to claim 8, characterized in that: The air intake check valve comprises: an air intake check valve base (21), a spring (22), a check valve core (23), a second O-type sealing ring (24) and an air intake check valve top cover (25); the check valve core (23) is arranged between the air intake check valve base (21) and the air intake check valve top cover (25); the check valve core (23) is sleeved with a spring (22); one end of the spring (22) contacts the check valve core (23) and the other end of the spring (22) contacts the inner wall of the air intake check valve base (21); the check valve core (23) is provided with a mounting groove for the second O-type sealing ring (24); the mounting groove is used to mount the second O-type sealing ring (24); the second O-type sealing ring (24) is fastened by the air intake check valve top cover (25).

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