Silent pilot head

Abstract

The utility model discloses a mute pilot head, which relates to the technical field of pilot heads, and comprises a pilot head shell, the upper end of the pilot head shell is fixedly connected with a static iron core, the bottom of the pilot head shell is movably inserted with a movable iron core, the bottom of the movable iron core is provided with a pilot valve port piston, and the outer edge of the bottom of the movable iron core is provided with a circle of bulge; a piston reset spring is arranged between the bottom protrusion of the movable iron core and the bottom of the pilot head shell, the pilot valve opening piston is a stepped circular truncated cone, and in the moving process of the movable iron core, the buffering ejector rod plays a buffering role to prevent the movable iron core from directly colliding with the anti-collision plug to generate noise. Meanwhile, due to the design of the built-in pilot valve port piston, fluid can flow stably when passing through the pilot valve port, noise generated by fluid impact is reduced, the pilot valve port piston is prevented from falling off, and the pilot valve has the advantages of being simple in structure, low in noise, long in service life and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to pilot head technical field, concretely relates to a mute pilot head. BACKGROUND

[0002] In the analysis of the original structure of the pilot head, we found that there are some problems. The O-ring bumper on the moving iron core of the pilot head is assembled by relying on the resistance of the hole wall, and the O-ring bumper is easy to fall off from its fixed position. This falling phenomenon may cause the O-ring bumper to be stuck between the static iron core and the moving iron core. Once this situation occurs, it will hinder the normal operation of the pilot head, making it unable to proceed smoothly. The pilot assembly may not move, thereby affecting the normal operation of the entire system. Therefore, we propose a mute pilot head. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at: for solving the O-ring bumper on the moving iron core of the pilot head is assembled by relying on the resistance of the hole wall, and the O-ring bumper is easy to fall off from its fixed position. This falling phenomenon may cause the O-ring bumper to be stuck between the static iron core and the moving iron core. Once this situation occurs, it will hinder the normal operation of the pilot head, making it unable to proceed smoothly. The pilot assembly may not move, thereby affecting the normal operation of the entire system. The utility model provides a mute pilot head.

[0004] The utility model discloses in order to realize the above-mentioned purpose specifically adopts the following technical scheme:

[0005] A mute pilot head, comprising a pilot head shell, the upper end of the pilot head shell is fixedly connected with a static iron core, and the bottom of the pilot head shell is movably inserted with a moving iron core, the bottom of the moving iron core is provided with a guide valve port piston, and the outer edge of the bottom of the moving iron core is provided with a circle of protrusions, the bottom protrusion of the moving iron core and the bottom of the pilot head shell are provided with a piston return spring, the guide valve port piston is a stepped circular truncated cone, and the bottom of the piston return spring is provided with a fixed slot matched with the guide valve port piston, the large end of the guide valve port piston is fixed in the fixed slot, a circular groove is formed in the center of the groove bottom of the fixed slot of the moving iron core, a bumper plug is inserted into the bottom of the circular groove, a buffer top rod is inserted into the middle of the circular groove of the moving iron core, and the two ends of the buffer top rod are respectively abutted with the guide valve port piston and the bumper plug.

[0006] In the embodiment, preferably, the buffer top rod is a hollow polyurethane rod body, and a plurality of pressure relief holes are uniformly formed in the outer wall of the buffer top rod.

[0007] Preferably, in the embodiment, an outer wall of the upper end of the moving iron core is provided with a clamping step, and a bumper pad is sleeved on the clamping step, an inner wall of the bumper pad is provided with a limiting step on the upper side, and a circle of anti-falling pressure rings is fixedly connected to the inner side wall of the clamping step on the upper end.

[0008] Preferably, in the embodiment, a reinforcing flange is fixedly connected to the inner circle of the bottom of the bumper pad, and a anti-falling clamping groove is provided in the inner circle of the lower side wall of the clamping step corresponding to the reinforcing flange.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. In the process of moving the moving iron core, the buffer top rod plays a buffering role, preventing the moving iron core from directly colliding with the anti-collision plug to generate noise. At the same time, the built-in guide valve port piston design enables the fluid to flow smoothly when passing through the guide valve port, reduces the noise generated by fluid impact, and prevents the guide valve port piston from falling off, having the advantages of simple structure, low noise, long service life and the like.

[0011] 2. The pressure relief hole provides space for the deformation of the buffer top rod when the buffer top rod is under pressure, and enables the polyurethane material buffer top rod to be elastically restored after being under pressure, improving the service life of the buffer top rod. Moreover, the polyurethane material has excellent wear resistance and corrosion resistance, further improving the durability of the device. In addition, the setting of the pressure relief hole can also reduce the resistance generated when the fluid passes through the buffer top rod, making the fluid flow more smoothly and further reducing the generation of noise.

[0012] 3. The bumper pad can buffer the collision of the outer edge of the upper end surface of the moving iron core when the moving iron core moves quickly, further preventing the moving iron core from hard colliding with the surrounding structure, thereby reducing the generation of noise, and the double anti-collision and buffering noise reduction effect is better. The design of the anti-falling pressure ring ensures that the bumper pad can be stably sleeved on the clamping step after installation, preventing the bumper pad from falling off during use, ensuring the stability and reliability of the device. In addition, the bumper pad is made of wear-resistant and corrosion-resistant rubber material, further improving the durability and service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the internal structure diagram of the utility model;

[0014] Figure 2 is the enlarged view of A in the utility model Figure 1

[0015] ​Marked: 1, pilot head shell; 2, static iron core; 3, moving iron core; 4, guide valve port piston; 5, piston return spring; 6, anti-collision plug; 7, buffer top rod; 8, pressure relief hole; 9, clamping step; 10, anti-collision pad; 11, anti-dropping pressure ring; 12, reinforcing flange. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.

[0017] Please refer to Figure 1 - Figure 2 The utility model provides a mute type pilot head, including pilot head shell 1, the upper end of pilot head shell 1 is fixedly connected with static iron core 2, and the bottom of pilot head shell 1 is movably inserted with moving iron core 3, the bottom of moving iron core 3 is provided with guide valve port piston 4, and the bottom of moving iron core 3 is provided with a ring of protrusion, be provided with piston return spring 5 between the bottom protrusion of moving iron core 3 and the bottom of pilot head shell 1, the guide valve port piston 4 is ladder shape circular table, and the bottom of piston return spring 5 is provided with the fixed slot that matches with guide valve port piston 4, the big end of guide valve port piston 4 is fixed in fixed slot with the top, the bottom center of the fixed slot of moving iron core 3 is provided with circular recess, the upper end center of anti-collision plug 6 is provided with buffer boss in circular recess bottom insertion, and buffer boss passes through moving iron core 3 upper end setting, the middle part of the circular recess of moving iron core 3 is inserted with buffer top rod 7, and the both ends of buffer top rod 7 are respectively with guide valve port piston 4 and anti-collision plug 6 abut.

[0018] The working principle and use flow of the utility model: when the device uses, when pilot head is electrified, static iron core 2 generates magnetic force and attracts moving iron core 3 to move upwards, moving iron core 3 drives guide valve port piston 4 to move upwards, thereby opening the guide valve port of pilot head. At this time, fluid passes through the guide valve port and enters the main valve, and pushes the main valve to open. When the pilot head is powered off, the static iron core 2 loses the magnetic force, and the moving iron core 3 is reset downward under the action of the piston return spring 5, and at the same time drives the guide valve port piston 4 to move downward, and blocks the guide valve port of the pilot head. At this time, the fluid is cut off, and the main valve is closed. In the process of moving the moving iron core 3, the buffer top rod 7 plays a buffering role, preventing the moving iron core 3 from directly colliding with the anti-collision plug 6 to produce noise. At the same time, the design of the built-in guide valve port piston 4 allows the fluid to flow smoothly when passing through the guide valve port, reducing the noise caused by fluid impact, and preventing the guide valve port piston 4 from falling off, with the advantages of simple structure, low noise, long service life, etc.

[0019] In this embodiment, preferably, the buffer ejector rod 7 is a hollow polyurethane rod body, and the outer wall of the buffer ejector rod 7 is uniformly provided with a plurality of pressure relief holes 8; through the setting of the pressure relief hole 8, the pressure relief hole 8 can provide space for the deformation of the buffer ejector rod 7 when the buffer ejector rod 7 is pressed, and at the same time, the polyurethane material buffer ejector rod 7 can be elastically recovered through the pressure relief hole 8 after being pressed, thereby improving the service life of the buffer ejector rod 7, and the polyurethane material has excellent wear resistance and corrosion resistance, thereby further improving the durability of the device. In addition, the setting of the pressure relief hole 8 can also reduce the resistance generated when the fluid passes through the buffer ejector rod 7, so that the fluid flows more smoothly, thereby further reducing the generation of noise.

[0020] In this embodiment, preferably, the upper end outer wall of the moving iron core 3 is provided with a clamping step 9, and the clamping step 9 is sleeved with a bump pad 10, the inner wall upper side of the bump pad 10 is provided with a limiting step, and the inner side wall upper end of the clamping step 9 is fixedly connected with a circle of anti-falling pressure ring 11, and the anti-falling pressure ring 11 is matched with the inner wall limiting step of the bump pad 10; through the setting of the bump pad 10, the bump pad 10 can buffer the collision of the outer edge of the upper end surface of the moving iron core 3 when the moving iron core 3 moves quickly, thereby further preventing the moving iron core 3 from hard collision with the surrounding structure, thereby reducing the generation of noise, and the double bumping and buffering noise reduction effect is better. The design of the anti-falling pressure ring 11 ensures that the bump pad 10 can be stably sleeved on the clamping step 9 after installation, prevents the bump pad 10 from falling off during use, and ensures the stability and reliability of the device. In addition, the bump pad 10 is made of wear-resistant and corrosion-resistant rubber material, thereby further improving the durability and service life of the device.

[0021] In this embodiment, preferably, the bottom of the bump pad 10 is fixedly connected with a reinforcing flange 12, and the inner circle of the lower side wall of the clamping step 9 is provided with an anti-falling clamping groove corresponding to the reinforcing flange 12; through the setting of the reinforcing flange 12, the dislocation deformation and falling off of the bump pad 10 can be further prevented, thereby improving the installation stability of the bump pad 10.

[0022] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A silent pilot head, comprising a pilot head housing (1), wherein a stationary iron core (2) is fixedly connected to the upper end of the pilot head housing (1), and a movable iron core (3) is movably inserted into the bottom of the pilot head housing (1), wherein a pilot valve piston (4) is provided at the bottom of the movable iron core (3), and a ring of protrusions is provided on the outer edge of the bottom of the movable iron core (3), and a piston return spring (5) is provided between the bottom protrusion of the movable iron core (3) and the bottom of the pilot head housing (1), characterized in that: The guide valve piston (4) is a stepped circular cone, and the bottom of the piston return spring (5) is provided with a fixed insertion slot matched with the guide valve piston (4), the large end of the guide valve piston (4) is fixed in the fixed insertion slot, the bottom center of the fixed insertion slot of the moving iron core (3) is provided with a circular groove, the bottom of the circular groove is inserted with a anti-collision plug (6), the upper end center of the anti-collision plug (6) is provided with a buffer boss, and the buffer boss penetrates the upper end of the moving iron core (3), the middle of the circular groove of the moving iron core (3) is inserted with a buffer top rod (7), and the two ends of the buffer top rod (7) are respectively abutted with the guide valve piston (4) and the anti-collision plug (6).

2. A silent pilot according to claim 1, characterized in that: The buffer top rod (7) is a hollow polyurethane rod body, and a plurality of pressure relief holes (8) are uniformly arranged on the outer wall of the buffer top rod (7).

3. The silent pilot according to claim 1, wherein: The upper end of the moving iron core (3) is provided with a clamping step (9), and the clamping step (9) is sleeved with an anti-collision pad (10), the inner wall of the anti-collision pad (10) is provided with a limiting step on the upper side, and the inner side wall of the clamping step (9) is fixedly connected with a circle of anti-loosening pressure rings (11), the anti-loosening pressure rings (11) are matched with the limiting step of the inner wall of the anti-collision pad (10).

4. A silent pilot according to claim 3, wherein: The bottom of the anti-collision pad (10) is fixedly connected with a reinforcing flange (12) in the inner circle, and the inner circle of the lower side wall of the clamping step (9) is provided with an anti-loosening clamping groove corresponding to the reinforcing flange (12).

Images