阅读说明：本技术 一种插装式高压卸荷电磁阀 (Plug-in type high-pressure unloading electromagnetic valve ) 是由 罗大亮 朱建国 周学锋 张思坤 梁树强 闫旭宇 于 2021-09-17 设计创作，主要内容包括：本发明涉及电磁阀,具体涉及一种插装式高压卸荷电磁阀,用于解决现有直动式电磁阀和卸荷式电磁阀无法满足姿控动力系统对电磁阀高压力大通径、小体积轻质量及响应迅速需求的不足之处。该插装式高压卸荷电磁阀,包括阀体、壳体、阀座、卸荷头、衔铁、螺套、复位弹簧、线圈和阀芯；阀座采用台阶分层密封结构设计,阀座内集成了进口流道和出口流道,实现了插装结构布局；通过进口流道和出口流道结构,将进口高压气体引流至进口腔及腔体,并将卸荷头外径a与环形密封面内径b设计为等尺寸,实现进口介质压力的卸荷结构设计。(The invention relates to an electromagnetic valve, in particular to a plug-in type high-pressure unloading electromagnetic valve, which is used for solving the defects that the existing direct-acting type electromagnetic valve and unloading type electromagnetic valve cannot meet the requirements of an attitude control power system on high pressure, large drift diameter, small volume, light weight and quick response of the electromagnetic valve. The plug-in type high-pressure unloading electromagnetic valve comprises a valve body, a shell, a valve seat, an unloading head, an armature, a threaded sleeve, a return spring, a coil and a valve core; the valve seat is designed by adopting a step layered sealing structure, and an inlet flow passage and an outlet flow passage are integrated in the valve seat, so that the arrangement of a plug-in mounting structure is realized; the inlet high-pressure gas is guided to an inlet cavity and a cavity body through the inlet runner and outlet runner structures, and the outer diameter a of the unloading head and the inner diameter b of the annular sealing surface are designed to be equal in size, so that the unloading structure design of inlet medium pressure is realized.)

1. The utility model provides a cartridge formula high pressure off-load solenoid valve which characterized in that: the valve comprises a valve body (1), a shell (10), a valve seat (8), an unloading head (9), an armature (4), a return spring (3), a threaded sleeve (5), a coil (2) and a valve core (7);

a valve seat (8) is arranged in the shell (10), a valve body (1) is arranged on the upper portion of the shell (10), and a cavity is formed between the valve body (1) and the valve seat (8);

a guide hole (81) positioned on the axis is formed in the valve seat (8), an unloading head (9) is arranged in the guide hole (81), and the side wall of the unloading head (9) is tightly attached to the inner wall of the guide hole (81);

an armature (4) is arranged in the cavity, and a vent hole which is through along the axial direction is arranged between the side wall of the armature (4) and the valve body (1); a through hole positioned on the axis is formed in the armature (4), a return spring (3) and a threaded sleeve (5) are arranged in the through hole, two ends of the return spring (3) are respectively connected with the valve body (1) and the threaded sleeve (5), and a limiting ring is arranged at the outlet of the lower end of the through hole along the radial direction; the coil (2) is arranged on the valve body (1);

one end of the valve core (7) extends into the guide hole (81) and is fixedly connected with the unloading head (9), and a gap is kept between the valve core (7) and the inner wall of the guide hole (81); the other end extends into the through hole to be fixedly connected with the threaded sleeve (5); an annular bulge (71) is arranged in the middle of the valve core (7) along the radial direction, a sealing ring (72) is arranged on one side, close to the valve seat (8), of the annular bulge (71), and an annular sealing surface is formed when the sealing ring (72) is in contact with the valve seat (8);

the outer diameter a of the unloading head (9) is equal to the inner diameter b of the annular sealing surface;

the valve core (7) is sleeved with a pre-tightening spring (6), and two ends of the pre-tightening spring (6) are respectively connected with the armature (4) and the annular bulge (71);

an inlet (12) and an outlet (14) are arranged on the shell (10), and the position of the outlet (14) is higher than that of the inlet (12); an inlet cavity (13) is formed between the valve seat (8) and the shell (10), an inlet flow channel and an outlet flow channel are arranged in the valve seat (8), and the inlet end of the inlet flow channel and the inlet end of the outlet flow channel are respectively positioned at the lower part and the upper part of the valve seat (8); the inlet (12) is communicated with the inlet end of the inlet runner through an inlet cavity (13), the outlet end of the inlet runner is communicated with the cavity, and the inner end of the outlet (14) is communicated with the outlet end of the outlet runner.

2. The plug-in type high-pressure unloading electromagnetic valve according to claim 1, characterized in that: the valve body (1) is provided with a blind hole (11).

3. The plug-in type high-pressure unloading electromagnetic valve according to claim 2, characterized in that: and a sealing ring is arranged between the side wall of the unloading head (9) and the inner wall of the guide hole (81).

4. The plug-in type high-pressure unloading electromagnetic valve according to claim 3, characterized in that: the valve core (7) and the unloading head (9) are fixedly connected in a threaded screwing mode.

5. The plug-in type high-pressure unloading electromagnetic valve according to any one of claims 1 to 4, characterized in that: and a sealing ring is arranged between the valve seat (8) and the shell (10) as well as between the valve body (1).

Technical Field

The invention relates to an electromagnetic valve, in particular to a plug-in type high-pressure unloading electromagnetic valve.

Background

In the development of rocket attitude control power systems, the control requirement of 30MPa high pressure and large drift diameter is provided for all electromagnetic valves, and the electromagnetic valves are required to be small and light in structure and quick in opening and closing response. The existing direct-acting electromagnetic valve has the advantages of small requirement on the attraction force of an electromagnet and high response speed, but the drift diameter of the electromagnetic valve is small and the requirement on high pressure cannot be met; the existing unloading type electromagnetic valve meets the requirement of high pressure and large drift diameter, but the volume and mass are usually larger because the existing unloading type electromagnetic valve needs larger electromagnet suction force.

Disclosure of Invention

The invention aims to overcome the defects that the existing direct-acting solenoid valve and unloading solenoid valve cannot meet the requirements of an attitude control power system on high pressure, large drift diameter, small volume, light weight and quick response of the solenoid valve, and provides a plug-in type high-pressure unloading solenoid valve.

In order to solve the defects of the prior art, the invention provides the following technical solutions:

a plug-in type high-pressure unloading electromagnetic valve is characterized in that: the valve comprises a valve body, a shell, a valve seat, an unloading head, an armature, a threaded sleeve, a return spring, a coil and a valve core;

a valve seat is arranged in the shell, a valve body is arranged at the upper part of the shell, and a cavity is formed between the valve body and the valve seat;

the valve seat is provided with a guide hole positioned on the axial line of the valve body, an unloading head is arranged in the guide hole, and the side wall of the unloading head is tightly attached to the inner wall of the guide hole;

an armature is arranged in the cavity, and a vent hole which is communicated along the axial direction is arranged between the side wall of the armature and the valve body; the armature is provided with a through hole positioned on the axis, a return spring and a threaded sleeve are arranged in the through hole, two ends of the return spring are respectively connected with the valve body and the threaded sleeve, and an outlet at the lower end of the through hole is radially provided with a limit ring; the coil is arranged on the valve body;

one end of the valve core extends into the guide hole to be fixedly connected with the unloading head, and a gap is kept between the valve core and the inner wall of the guide hole; the other end extends into the through hole and is fixedly connected with the threaded sleeve; the middle part of the valve core is radially provided with an annular bulge, one side of the annular bulge, which is close to the valve seat, is provided with a sealing ring, and the sealing ring forms an annular sealing surface when contacting with the valve seat;

the outer diameter a of the unloading head is equal to the inner diameter b of the annular sealing surface;

the valve core is sleeved with a pre-tightening spring, and two ends of the pre-tightening spring are respectively connected with the armature and the annular bulge;

the shell is provided with an inlet and an outlet, and the outlet is higher than the inlet; an inlet cavity is formed between the valve seat and the shell, an inlet flow passage and an outlet flow passage are arranged in the valve seat, and the inlet end of the inlet flow passage and the inlet end of the outlet flow passage are respectively positioned at the lower part and the upper part of the valve seat; the inlet is communicated with the inlet end of the inlet runner through the inlet cavity, the outlet end of the inlet runner is communicated with the cavity, and the inner end of the outlet is communicated with the outlet end of the outlet runner.

Furthermore, the valve body is provided with a blind hole for reducing the mass of the valve body.

Furthermore, a sealing ring is arranged between the side wall of the unloading head and the inner wall of the guide hole and used for sliding sealing.

Furthermore, the valve core and the unloading head are fixedly connected in a threaded screwing mode.

Further, the contact surfaces of the valve seat, the shell and the valve body are provided with sealing rings for isolation and sealing.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention adopts the combination of the plug-in mounting structure and the unloading structure, thereby realizing the design requirements of high pressure, large drift diameter, small volume, light weight and quick response; the valve seat is designed by adopting a step layered sealing structure, the inlet runner and the outlet runner are integrated in the valve seat, and the sealing rings are arranged on the contact surfaces of the valve seat, the shell and the valve body, so that the plug-in mounting structure layout is realized, a valve path system can conveniently plug a plurality of electromagnetic valves on the same plane and can conveniently arrange the system pipeline, and the system integration arrangement is facilitated; according to the invention, through the inlet runner and outlet runner structures, inlet high-pressure gas is guided to the inlet cavity and the cavity, and the outer diameter a of the unloading head and the inner diameter b of the annular sealing surface are designed to be equal in size, so that the upward force of the high-pressure gas acting on the unloading head and the downward force acting on the annular sealing surface are mutually offset, and the unloading structure design of inlet medium pressure is realized.

(2) The valve core, the threaded sleeve and the unloading head are fixedly connected to form a whole, and the relative position of the armature and the annular bulge is fixed by combining the limiting ring and the pre-tightening spring, so that the impact of the annular bulge and the sealing ring on the valve seat during axial movement is buffered.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

The reference numerals are explained below: 1-a valve body; 2-a coil; 3-a return spring; 4-an armature; 5-thread sleeve; 6-pre-tightening the spring; 7-valve core, 71-annular bulge and 72-sealing ring; 8-valve seat, 81-pilot hole; 9-unloading head; 10-a housing; 11-blind holes; 12-an inlet; 13-an inlet chamber; 14-outlet.

Detailed Description

The invention will be further described with reference to the drawings and exemplary embodiments.

Referring to fig. 1, a plug-in type high-pressure unloading electromagnetic valve comprises a valve body 1, a shell 10, a valve seat 8, an unloading head 9, an armature 4, a return spring 3, a coil 2, a valve core 7 and a threaded sleeve 5; the valve seat 8 and the valve core 7 are made of metal.

A valve seat 8 is arranged in the shell 10, a valve body 1 is arranged at the upper part of the shell 10, and a cavity is formed between the valve body 1 and the valve seat 8; a guide hole 81 positioned on the axis is formed in the valve seat 8, an unloading head 9 is arranged in the guide hole 81, the side wall of the unloading head 9 is tightly attached to the inner wall of the guide hole 81, a sealing ring is arranged at the attachment position, and a sliding seal is formed between the unloading head 9 and the valve seat 8; an armature iron 4 is arranged in the cavity, and a vent hole which is through along the axial direction is arranged between the side wall of the armature iron 4 and the valve body 1; the armature 4 is provided with a through hole positioned on the axis, a return spring 3 and a threaded sleeve 5 are arranged in the through hole, two ends of the return spring 3 are respectively connected with the valve body 1 and the threaded sleeve 5, and an outlet at the lower end of the through hole is radially provided with a limiting ring for axially limiting the threaded sleeve 5; the coil 2 is arranged on the valve body 1. The valve body 1 is also provided with a blind hole 11 for weight reduction.

One end of the valve core 7 extends into the guide hole 81 and is fixedly connected with the unloading head 9 in a thread mode, a gap is kept between the valve core 7 and the inner wall of the guide hole 81, the other end of the valve core extends into the through hole and is fixedly connected with the threaded sleeve 5 in a thread screwing mode, and the valve core 7, the threaded sleeve 5 and the unloading head 9 are fixedly connected to form an integral structure; an annular bulge 71 is arranged in the middle of the valve core 7 along the radial direction, a sealing ring 72 made of plastic is arranged on one side, close to the valve seat 8, of the annular bulge 71, and an annular sealing surface is formed when the sealing ring 72 is in contact with the valve seat 8; the valve core 7 is sleeved with a pre-tightening spring 6, and two ends of the pre-tightening spring 6 are respectively connected with the armature 4 and the annular bulge 71, so that the positions of the armature 4 and the annular bulge 71 are relatively fixed, namely, the impact of the annular bulge 71 and the sealing ring 72 on the valve seat 8 during axial movement is buffered.

An inlet 12 and an outlet 14 are arranged on the side wall of the shell 10, the inlet 12 is positioned at the lower part of the side wall of the shell 10, the outlet 14 is positioned higher than the inlet 12, an inlet cavity 13 is formed between the valve seat 8 and the shell 10, an inlet flow passage and an outlet flow passage are arranged in the valve seat 8, and the inlet end of the inlet flow passage and the inlet end of the outlet flow passage are respectively positioned at the lower part and the upper part of the valve seat 8; the inlet 12 is communicated with the inlet channel through the inlet cavity 13, the inlet channel is communicated with the cavity, the inner end of the outlet 14 is communicated with the outlet channel, and the inlet 12, the inlet cavity 13, the inlet channel, the cavity, the outlet channel and the outlet 14 form a medium channel; an inlet flow passage and an outlet flow passage are integrated in the valve seat 8, and sealing rings are arranged on the contact surfaces of the valve seat 8, the shell 10 and the valve body 1 to form a step layered sealing structure, so that the plug-in mounting structure is realized, and a valve path system can plug a plurality of electromagnetic valves on the same plane and can be conveniently distributed on the system pipeline.

The valve core 7 has two positions of closing and opening; when the coil 2 is not electrified, the valve core 7 is in a closed state under the action of the return spring 3, the sealing ring 72 is contacted with the valve seat 8 to form an annular sealing surface, and gas flows in from the inlet 12 and flows into the cavity from the inlet cavity 13 and the inlet runner; when the coil 2 is electrified, electromagnetic suction force is generated between the coil 2 and the armature 4, so that the armature 4 overcomes the acting force of the reset spring 3, the valve core 7 and the unloading head 9 are driven to do integral axial movement through the threaded sleeve 5 until a gap is generated between the sealing ring 72 and the valve seat 8, the valve core 7 is in an open state, and gas flows in from the inlet 12, flows through the inlet cavity 13, the inlet flow channel, the cavity and the outlet flow channel, and finally flows out from the outlet 14; when the coil 2 is powered off, the electromagnetic attraction disappears, and the valve core 7 moves to a closed state under the action of the return spring 3.

Before the work, the coil 2 is not electrified, and the inlet 12 is filled with high-pressure gas, the high-pressure gas at the inlet 12 is guided to the inlet cavity 13 and the cavity body through the inlet runner and the outlet runner structure, the outer diameter a of the unloading head 9 and the inner diameter b of the annular sealing surface are designed to be equal in size, so that the upward force of the high-pressure gas acting on the unloading head 9 and the downward force of the high-pressure gas acting on the annular sealing surface are mutually offset, and the unloading structure design is realized.

The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.