阅读说明：本技术 无弹簧式两位两通常开高速开关阀 (Spring-free two-position two-way normally-open high-speed switch valve ) 是由 刘银水 徐龙 牛壮 曹文斌 孟家舟 于 2019-11-21 设计创作，主要内容包括：本发明属于阀体技术领域,涉及一种无弹簧式两位两通常开高速开关阀,包括阀体组件,所述阀体组件上安装电磁铁组件,电磁铁组件连接衔铁组件,其特征在于：所述阀体组件包括阀座,阀座上安装阀体,阀体的内孔中导向设置阀芯,阀芯下端与阀座相配合,用于控制阀座轴向孔的通断；该开关阀能够有效满足运行环境要求,阀体响应速度快。本发明结构简单紧凑,采用无弹簧高速开关阀设计,避免了复位弹簧影响响应速度的问题。本发明极靴、衔铁间采用可调工作气隙,减小了因固定工作气隙而带来的极靴定位难度,降低了装配难度。(The invention belongs to the technical field of valve bodies, and relates to a spring-free two-position two-way normally-open high-speed switch valve which comprises a valve body assembly, wherein an electromagnet assembly is arranged on the valve body assembly and is connected with an armature assembly, and the spring-free two-position two-way normally-open high-speed switch valve is characterized in that: the valve body assembly comprises a valve seat, a valve body is arranged on the valve seat, a valve core is arranged in an inner hole of the valve body in a guiding mode, and the lower end of the valve core is matched with the valve seat and used for controlling the on-off of an axial hole of the valve seat; the switch valve can effectively meet the requirements of the operating environment, and the response speed of the valve body is high. The invention has simple and compact structure, adopts the design of a spring-free high-speed switch valve and avoids the problem that the response speed is influenced by the return spring. The adjustable working air gap is adopted between the pole shoe and the armature, so that the positioning difficulty of the pole shoe caused by fixing the working air gap is reduced, and the assembly difficulty is reduced.)

1. The utility model provides a two logical normally open high-speed ooff valves of no spring, includes the valve body subassembly, install electromagnet assembly on the valve body subassembly, electromagnet assembly connects armature subassembly, its characterized in that: the valve body assembly comprises a valve seat (18), a valve body (14) is mounted on the valve seat (18), a valve core (17) is arranged in an inner hole of the valve body (14) in a guiding mode, and the lower end of the valve core (17) is matched with the valve seat (18) and used for controlling the on-off of an axial hole of the valve seat (18);

the armature component is arranged in a central hole of the electromagnet component and comprises a pole shoe (11), an armature (5) and a magnetism isolating sleeve (6), wherein the magnetism isolating sleeve (6) is arranged in the central hole of the electromagnet component in a tight fit mode, the pole shoe (11) and the armature (5) are arranged in an inner hole of the magnetism isolating sleeve (6) in a matching mode, a valve core (17) penetrates through the inner hole of the pole shoe (11) and is fixedly connected with the armature (5), a top seat (3) is arranged on the top of the armature (5), a gland (2) is arranged on the electromagnet component, the magnetism isolating sleeve (6) is arranged in the inner hole of the gland (2) in a fitting mode, the top surface of the top seat (3) abuts against a limiting portion of the axial upper end of the gland (2), the top of the gland (2) is in threaded connection with an adjusting screw (1), and the lower end; and a space is reserved between the lower end surface of the armature iron (5) and the upper end surface of the pole shoe (11) to form an air gap.

2. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: a guide sleeve (16) is arranged in an inner hole of the valve body (14), and a valve core (17) is arranged in the guide sleeve (16) in a matching mode.

3. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: the electromagnet assembly comprises an electromagnet shell (8), a framework (9) is arranged in the electromagnet shell (8), a coil (10) is wound on the framework (9), and an electromagnet end cover (13) is fixedly connected with an opening in the lower portion of the electromagnet shell (8).

4. The springless two-position two-way normally open high-speed switch valve of claim 3, characterized in that: the upper end of the framework (9) is a plane, and the lower end of the framework is provided with a groove matched with the protruding part of the electromagnet end cover (13).

5. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: the top of the top seat (3) is provided with a groove, and the radial extension part at the lower end of the adjusting screw (1) extends into the groove on the top surface of the top seat (3).

6. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: a first O-shaped ring (4) is arranged in a groove in the circumferential surface of the top seat (3), and the outer ring of the first O-shaped ring (4) is matched with the inner wall of the magnetism isolating sleeve (6).

7. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: a second O-shaped ring (7) is arranged in a groove body on the top surface of the framework (9), and the inner wall of the second O-shaped ring (7) is attached to the circumferential surface of the magnetism isolating sleeve (6); and a third O-shaped ring (12) is arranged in a groove body on the circumferential surface of the lower part of the framework (9), and the outer ring of the third O-shaped ring (12) is pressed on the inner wall of the electromagnet shell (8).

8. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: and a fourth O-shaped ring (15) is arranged in a surface groove body of the valve body (14).

9. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: four radially extending flow guide openings (22) are uniformly distributed on the upper portion of the valve seat (18) along the circumference, and a valve port sealing surface (23) is arranged in an inner hole of the valve seat (18).

10. The springless two-position two-way normally open high-speed switch valve of claim 1, characterized in that: the circumferential surface of the pole shoe (11) is provided with a sealing groove (20), and the top surface of the pole shoe (11) opposite to the armature (5) is provided with a damping groove (21) extending axially.

Technical Field

The invention belongs to the technical field of valve bodies and relates to a spring-free two-position two-way normally-opened high-speed switch valve.

Background

The main element for regulating and controlling the wavelets in the traditional water turbine speed regulating system is a proportional servo valve which has high cost, poor pollution resistance and a middle dead zone. The high-speed switch valve is used as a core element of digital hydraulic pressure, and is widely applied to a water turbine speed regulating system due to the characteristics of strong pollution resistance, high response speed, small leakage, direct acceptance of digital signals and the like.

The high-speed switch valve is a core component of a digital hydraulic technology, the working mode of the high-speed switch valve is a switch action driven by a PWM signal, and due to the electromagnetic induction principle, when current passes through a coil, a closed magnetic circuit is formed by the coil, an armature and a pole shoe, so that electromagnetic force is generated to drive the armature to push a valve core to move.

The traditional two-position two-normal open type high-speed switch valve adopts a spring reset mode, an electromagnet is electrified, the electromagnetic force overcomes the hydraulic pressure force, a valve core is pushed, and a valve port is closed; when the electromagnet is powered off, the valve core is pulled under the action of the spring force to open the valve port; the presence of a return spring affects the response time of the valve.

The traditional two-position two-normal open type high-speed switch valve adopts a packaging structure, namely, an armature and a pole shoe are sealed in a magnetism isolating sleeve, so that the value of a maximum working air gap is constant, the maximum opening of a valve port is determined, the frequency and the flow of the high-speed switch valve are related to the stroke of a valve core, the flow is increased along with the larger the stroke of the valve core, but the frequency is reduced along with the valve core, so that the requirements on the frequency and the flow in different application occasions are different, and the frequency or the flow needs to be known more.

Disclosure of Invention

Aiming at the problems, the invention provides the spring-free two-position two-way normally-open high-speed switch valve which can effectively meet the requirements of the operating environment and has high corresponding speed of the valve body.

According to the technical scheme of the invention: the utility model provides a two logical normally open high-speed ooff valves of no spring, includes the valve body subassembly, install electromagnet assembly on the valve body subassembly, electromagnet assembly connects armature subassembly, its characterized in that: the valve body assembly comprises a valve seat, a valve body is arranged on the valve seat, a valve core is arranged in an inner hole of the valve body in a guiding mode, and the lower end of the valve core is matched with the valve seat and used for controlling the on-off of an axial hole of the valve seat;

the armature component is arranged in a central hole of the electromagnet component and comprises a pole shoe, an armature and a magnetism isolating sleeve, wherein the magnetism isolating sleeve is arranged in the central hole of the electromagnet component in a tight fit mode, the pole shoe and the armature are arranged in an inner hole of the magnetism isolating sleeve in a matching mode, a valve core penetrates through the inner hole of the pole shoe and is fixedly connected with the armature, a top seat is arranged at the top of the armature, a gland is arranged on the electromagnet component, the magnetism isolating sleeve is arranged in the inner hole of the gland in a fitting mode, the top surface of the top seat abuts against a limiting part at the axial upper end of the gland, the top of the gland is in threaded connection with an; and a space is reserved between the lower end face of the armature and the upper end face of the pole shoe to form an air gap.

As a further improvement of the invention, a guide sleeve is arranged in an inner hole of the valve body, and the valve core is arranged in the guide sleeve in a matching way.

As a further improvement of the invention, the electromagnet assembly comprises an electromagnet shell, a framework is arranged in the electromagnet shell, a coil is wound on the framework, and an electromagnet end cover is fixedly connected with an opening at the lower part of the electromagnet shell.

As a further improvement of the invention, the upper end of the framework is a plane, and the lower end of the framework is provided with a groove matched with a convex part of the electromagnet end cover.

As a further improvement of the invention, the top of the top seat is provided with a groove, and the radial extension part at the lower end of the adjusting screw extends into the groove on the top surface of the top seat.

As a further improvement of the invention, a first O-shaped ring is arranged in a groove on the circumferential surface of the top seat, and the outer ring of the first O-shaped ring is matched with the inner wall of the magnetism isolating sleeve.

As a further improvement of the invention, a second O-shaped ring is arranged in the groove body on the top surface of the framework, and the inner wall of the second O-shaped ring is attached to the circumferential surface of the magnetism isolating sleeve; and a third O-shaped ring is arranged in a groove body on the circumferential surface of the lower part of the framework, and the outer ring of the third O-shaped ring is tightly pressed on the inner wall of the electromagnet shell.

As a further improvement of the invention, a fourth O-shaped ring is arranged in a surface groove body of the valve body.

As a further improvement of the invention, four guide openings extending in the radial direction are uniformly distributed on the upper part of the valve seat along the circumference, and a valve port sealing surface is arranged in an inner hole of the valve seat.

As a further improvement of the invention, the circumferential surface of the pole shoe is provided with a sealing groove, and the top surface of the pole shoe opposite to the armature is provided with an axially extending damping groove.

The invention has the technical effects that: the invention has simple and compact structure, adopts the design of a spring-free high-speed switch valve and avoids the problem that the response speed is influenced by the return spring. The adjustable working air gap is adopted between the pole shoe and the armature, so that the positioning difficulty of the pole shoe caused by fixing the working air gap is reduced, and the assembly difficulty is reduced. The armature and the pole shoe of the invention both adopt permalloy soft magnetic materials, and have high magnetic conductivity, low coercive force, better antirust capability and processability. The gland is provided with the threaded hole, and the top seat is limited by the screw, so that the adjustability of the working air gap is achieved. The damping groove is formed in the waist of the pole shoe, the groove is filled with liquid, and the armature iron extrudes the liquid when moving downwards, so that the damping effect is achieved. The valve seat is provided with a flow guide opening for balancing radial force at the valve port so as to prevent the valve core from being unstable.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic diagram of a pole shoe structure.

Fig. 4 is a schematic view of the valve seat structure.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

In fig. 1 to 4, the electromagnetic valve comprises an adjusting screw 1, a gland 2, a top seat 3, a first O-ring 4, an armature 5, a magnetic isolation sleeve 6, a second O-ring 7, an electromagnet housing 8, a framework 9, a coil 10, a pole shoe 11, a third O-ring 12, an electromagnet end cover 13, a valve body 14, a fourth O-ring 15, a guide sleeve 16, a valve core 17, a valve seat 18, a fifth O-ring 19, a sealing groove 20, a damping groove 21, a flow guide port 22, a valve port sealing surface 23 and the like.

As shown in fig. 1 to 4, the invention relates to a spring-free two-position two-way normally-open high-speed switch valve, which comprises a valve body assembly, wherein an electromagnet assembly is arranged on the valve body assembly and is connected with an armature assembly, the valve body assembly comprises a valve seat 18, a valve body 14 is arranged on the valve seat 18, a valve core 17 is arranged in an inner hole of the valve body 14 in a guiding manner, and the lower end of the valve core 17 is matched with the valve seat 18 and is used for controlling the on-off of an axial hole of; it will be appreciated that in order to achieve effective guidance of the valve element 17, a guide sleeve 16 is arranged in the bore of the valve body 14, the valve element 17 being arranged in a matching manner in said guide sleeve 16.

The armature component is arranged in a central hole of the electromagnet component and comprises a pole shoe 11, an armature 5 and a magnetism isolating sleeve 6, wherein the magnetism isolating sleeve 6 is arranged in the central hole of the electromagnet component in a tight fit mode, the pole shoe 11 and the armature 5 are arranged in an inner hole of the magnetism isolating sleeve 6 in a matching mode, a valve core 17 penetrates through the inner hole of the pole shoe 11 to be fixedly connected with the armature 5, the top of the armature 5 is provided with a top seat 3, a gland 2 is arranged on the electromagnet component, the magnetism isolating sleeve 6 is arranged in the inner hole of the gland 2 in a fitting mode, the top surface of the top seat 3 abuts against a limiting part of the axial upper end of the gland 2, the top of the gland 2 is in threaded connection with an adjusting screw 1; and a space is reserved between the lower end surface of the armature 5 and the upper end surface of the pole shoe 11 to form an air gap.

The electromagnet assembly comprises an electromagnet shell 8, a framework 9 is arranged in the electromagnet shell 8, a coil 10 is wound on the framework 9, and an electromagnet end cover 13 is fixedly connected with an opening in the lower portion of the electromagnet shell 8.

The upper end of the framework 9 is a plane, and the lower end is provided with a groove matched with the convex part of the electromagnet end cover 13.

The top of the top seat 3 is provided with a groove, and the radial extension part of the lower end of the adjusting screw 1 extends into the groove on the top surface of the top seat 3.

In order to realize reliable sealing of the product, a first O-shaped ring 4 is arranged in a groove on the circumferential surface of the top seat 3, and the outer ring of the first O-shaped ring 4 is matched with the inner wall of the magnetism isolating sleeve 6.

A second O-shaped ring 7 is arranged in a groove body on the top surface of the framework 9, and the inner wall of the second O-shaped ring 7 is attached to the circumferential surface of the magnetism isolating sleeve 6; and a third O-shaped ring 12 is arranged in a groove body on the circumferential surface of the lower part of the framework 9, and the outer ring of the third O-shaped ring 12 is tightly pressed on the inner wall of the electromagnet shell 8. A fourth O-ring 15 is arranged in a groove body on the surface of the valve body 14.

As shown in fig. 4, four radially extending diversion ports 22 are uniformly distributed on the upper portion of the valve seat 18 along the circumference, and a valve port sealing surface 23 is disposed in the inner hole of the valve seat 18.

As shown in fig. 3, the circumferential surface of the pole piece 11 is provided with a sealing groove 20, and the top surface of the pole piece 11 opposite to the armature 5 is provided with an axially extending damping groove 21.

As shown in fig. 3 and 4, the pole shoe 11 of the present invention is a damping pole shoe structure, that is, a damping groove 21 is formed at the end of the pole shoe, when liquid enters the cavity, the damping groove 21 is filled, and when the armature 5 acts, the liquid is squeezed to play a role of damping and buffering; meanwhile, the invention also provides a valve seat structure with the diversion port 22, namely four openings are uniformly distributed in the circumferential direction of the valve seat, liquid can impact the valve core 17 after entering through the port P, and the diversion port 22 can balance the radial force at the position of the valve core 17, so that the valve core 17 in a suspension position can stably act.

In the invention, the maximum working air gap between the armature 5 and the pole shoe 11 is set to be 1mm, and in the use process, the working air gap can be adjusted by controlling the screwing-in length of the adjusting screw 1 to be less than 1mm, so that the stroke of the valve core 17 can be adjusted, and the opening degree of a valve port can be controlled.

When the invention is actually installed and operated, the guide sleeve 16 is firstly pressed into the inner hole of the valve body 14, and then the pole shoe 11 is pressed into the mounting hole above the valve body 14; the valve core rod 17 enters the through hole of the valve body 14; then the upper end of the valve core rod 17 is in threaded connection with the armature 5; then, glue is applied to the sealing groove 20 at the waist part of the pole shoe 11, and the magnetic isolation sleeve 6 is sleeved on the armature 5 and the pole shoe 11; then the valve seat 18 is pressed into the valve body 14, and meanwhile, the armature 5 is pulled to detect whether the valve core rod 17 can move flexibly; then installing an O ring 4 on the top seat 3, and pressing the O ring and the magnetic isolation sleeve 6 together to ensure that the outer section of the O ring and the end face of the magnetic isolation sleeve 6 are superposed; inserting the electromagnet assembly into the magnetism isolating sleeve 6, sleeving the gland 2 into the magnetism isolating sleeve 6, and pressing the electromagnet assembly; finally, the adjusting screw 1 is screwed into the threaded hole of the gland 2 to be in contact with the top seat 3. And assembling the whole spring-free two-position two-way high-speed switch valve.

The working principle of the invention is as follows: inserting a magnetic isolation sleeve 6 wrapping an armature 5 and a pole shoe 11 into a central hole of the electromagnet, effectively connecting the pole shoe 11 and an armature 5 magnetic circuit, and forming a closed magnetic circuit with an electromagnet shell 8, after electrifying, an electromagnetic field generated in a coil 10 penetrates through the middle part of the coil 10 to effectively connect the armature 5, the pole shoe 11 and an electromagnet end cover 13 into a sleeve mechanism, and generating a vertically downward suction under the action of the electromagnetic field, so that the armature 5 is stressed to move downward to push a valve core 17, thereby closing a valve port; when the electromagnet is not electrified, the armature 5 loses the action of the electromagnetic force, and the valve core 17 moves upwards under the action of the hydraulic force to push the armature to reset, so that the valve port is opened.