CN211501668U

CN211501668U - Spring-free two-position two-way normally-open high-speed switch valve

Info

Publication number: CN211501668U
Application number: CN201922027519.XU
Authority: CN
Inventors: 刘银水; 徐龙; 牛壮; 曹文斌; 孟家舟
Original assignee: Lanzhou University of Technology; HUST Wuxi Research Institute
Current assignee: Lanzhou University of Technology; HUST Wuxi Research Institute
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-09-15
Anticipated expiration: 2029-11-21

Abstract

The utility model belongs to the technical field of the valve body, a high-speed ooff valve is normally opened to two logical of no spring is related to, including 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 switch valve can effectively meet the requirements of the operating environment, and the response speed of the valve body is high. The utility model discloses simple structure is compact, adopts the design of no spring high-speed ooff valve, has avoided reset spring to influence response speed's problem. The utility model discloses adopt adjustable working air gap between terminal shoe, armature, reduced the terminal shoe location degree of difficulty that brings because of fixed working air gap, reduced the assembly degree of difficulty.

Description

Spring-free two-position two-way normally-open high-speed switch valve

Technical Field

The utility model belongs to the technical field of the valve body, a high-speed ooff valve is normally opened to two logical of no spring is related to.

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

The utility model is directed to the above problem, a high-speed ooff valve is normally opened to two logical of no spring is provided, and this ooff valve can effectively satisfy the operational environment requirement, and the valve body is corresponding fast.

According to the technical scheme of the utility model: 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, the valve body inner hole is provided with a guide sleeve, and the valve core is matched and arranged in the guide sleeve.

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

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

As a further improvement of the utility model, the footstock top sets up the recess, and the radial extension of adjusting screw lower extreme stretches into in the recess of footstock top surface.

As a further improvement, the inner wall cooperation of first O type circle, first O type circle outer lane and magnetism isolating sleeve is set up in the circumferential surface recess of footstock.

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

As a further improvement, the upper portion of the valve seat is provided with four radially extending flow guide ports along the circumference uniform distribution, and a valve port sealing surface is arranged in the inner hole of the valve seat.

As a further improvement of the utility model, the circumferential surface of pole shoe sets up the seal groove, and the pole shoe is provided with axial extension's damping groove with the relative top surface of armature.

The technical effects of the utility model reside in that: the utility model discloses simple structure is compact, adopts the design of no spring high-speed ooff valve, has avoided reset spring to influence response speed's problem. The utility model discloses adopt adjustable working air gap between terminal shoe, armature, reduced the terminal shoe location degree of difficulty that brings because of fixed working air gap, reduced the assembly degree of difficulty. The utility model discloses armature, pole shoe have all adopted permalloy soft magnetic material, have high magnetic conductivity, low coercive force, better rust-resistant ability and processability. The utility model discloses open threaded hole on the gland, carry on spacingly through the screw to the footstock to reach the adjustability of working air gap. The utility model discloses it has the shock attenuation groove to open at the pole shoe waist, is full of liquid in the groove, and armature extrudees liquid when acting downwards to play buffering absorbing effect. The utility model discloses it has the water conservancy diversion mouth to open on the disk seat for balanced valve port department radial force, in order to prevent the valve core unstability.

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 description will further describe embodiments of the present invention with reference to the accompanying 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. 1-4, the utility model 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, the electromagnet assembly 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 the utility model discloses the reliable seal of product sets up first O type circle 4 in the circumferential surface recess of footstock 3, the inner wall cooperation of 4 outer lanes of first O type circle and magnetism spacer 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, i.e. the end of the pole shoe is provided with a damping groove 21, after the liquid enters the cavity, the damping groove 21 is filled, and the armature 5 acts by squeezing the liquid to play a damping and buffering role; simultaneously the utility model also provides a valve seat structure who opens there is water conservancy diversion mouth 22, be provided with four openings of equipartition in disk seat circumference promptly, liquid can strike case 17 after P mouth gets into, and water conservancy diversion mouth 22 will balance the radial force of case 17 department for the case 17 stationary motion that is in the suspension position.

The utility model discloses the biggest working air gap between well armature 5 and pole shoe 11 sets up to 1mm, and in the use, the working air gap is adjusted to accessible control adjusting screw 1's screw in length, makes it be less than 1mm, can adjust the stroke of valve core 17 to control the valve port aperture.

When the utility model 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 utility model discloses the theory of operation: 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.

Claims

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 3, 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.