CN115163854A

CN115163854A - Large-traffic gate valve subassembly

Info

Publication number: CN115163854A
Application number: CN202210819129.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Changsha Qijun Electromechanical Technology Co ltd
Current assignee: Changsha Qijun Electromechanical Technology Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-10-11
Anticipated expiration: 2042-07-13
Also published as: CN115163854B

Abstract

The application relates to the technical field of valves, and provides a large-traffic gate valve subassembly, includes: the main valve body is internally provided with a main valve cavity, the main valve body forms a main valve inlet and a main valve outlet, and the main valve body is provided with an inclined channel; a magnetic member installed in the main valve chamber, a main valve element installed in the main valve chamber, the main valve element being movably installed in the main valve chamber in an axial direction of the main valve body; the micro-control valve comprises a magnetic component, a valve shell with an inner cavity and a valve core component arranged in the inner cavity; when the fluid inlet and the fluid outlet of the micro control valve are isolated from each other, the main valve core blocks the main valve outlet, when the fluid inlet and the fluid outlet of the micro control valve are communicated with each other, the inclined channel generates negative pressure on the outflow side of the main valve outlet to enable the main valve core to move towards the main valve inlet so as to enable the main valve inlet and the main valve outlet to be communicated with each other, and the large-flow gate valve assembly can rapidly and efficiently control the on-off of a large flow valve through the on-off of a magnetic force controlled micro control valve.

Description

Large-traffic gate valve subassembly

Technical Field

The application relates to the technical field of flow valves, and more particularly relates to a large-flow gate valve assembly.

Background

Liquid and gaseous medium fluids need various functional elements to control, such as flow limitation, pressure limitation, one-way, opening and closing, filtration and the like, according to working conditions during storage, transportation and use. Where the maximum number of switches that are controlled to turn on and off.

According to the pressure grade division, the medium-high pressure intervals of the gas are respectively 1.6-6.4MPa and 6.4-10MPa. The pressure is positively correlated to the bearing grade, installation process and manufacturing cost of the whole casing pipe network system. The structure of the existing large-flow gate valve is restricted by the following three factors:

1. the medium-high pressure medium has pressure resistance on the valve shell, and has large drift diameter and high flow rate requirements, so that the indexes of material strength and wall thickness are increased rapidly, and the processing technology and the manufacturing cost are increased along with the increase.

2. The valve core is under high pressure, and under the effect of big stress surface, the frictional force of fitting surface is very big, realizes big angle and long displacement operation to the gate valve, and the moment or the drive power that open required are also very high, and the energy transfer under ordinary electromagnetic control is not enough to promote the action of gate valve.

3. The transmission mechanism needs to be sealed, and has adverse effects on the machining precision and the service life. Therefore, a motor is generally used to drive a reduction gear, and a large torque is used to drive a gate valve. Or other air source and hydraulic secondary circuit control. Therefore, the whole device has complex structure and larger volume, and has a series of problems in installation, maintenance and use.

In a word, the opening and closing control of the large flow valve in the prior art is difficult, and the opening and closing control mechanism is very complex.

Disclosure of Invention

The invention mainly aims to provide a large-flow gate valve assembly, and aims to solve the technical problems that the opening and closing control of a large flow valve is difficult and an opening and closing control mechanism is complex in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a high flow gate valve assembly, comprising:

a main valve body, wherein a main valve cavity is arranged inside the main valve body, a first axial end of the main valve body forms a main valve inlet communicated with the main valve cavity, a second axial end of the main valve body forms a main valve outlet communicated with the main valve cavity, an inclined channel is arranged on the main valve body, one end of the inclined channel faces the outer side of the main valve body, the other end of the inclined channel faces the inner side of the main valve body and is communicated to the main valve outlet, and the inclined channel and the axial direction of the main valve outlet are arranged in an acute angle;

a magnetic member installed in the main valve chamber,

a main spool mounted in the main valve chamber, the main spool being movably mounted in the main valve chamber in an axial direction of the main valve body;

a micro control valve comprising a magnetic assembly, a valve housing having an inner cavity, and a valve core assembly disposed in the inner cavity, wherein a first axial end of the valve housing forms a fluid inlet communicated with the inner cavity, a second axial end of the valve housing forms a fluid outlet communicated with the inner cavity, the valve core assembly is magnetically attracted by the magnetic assembly to move in the inner cavity along the axial direction of the valve housing so as to isolate or communicate the fluid inlet and the fluid outlet from each other, the fluid inlet is opened to the main valve cavity, the fluid outlet is opened to the main valve outlet through an inclined channel, and the inclined channel faces to an outflow side of the main valve outlet and is arranged at an acute angle with the axial direction of the main valve outlet;

when the fluid inlet and the fluid outlet of the micro control valve are mutually isolated, the main valve core blocks the main valve outlet through the magnetic attraction of the magnetic part and the fluid thrust entering the main valve cavity, and when the fluid inlet and the fluid outlet of the micro control valve are mutually communicated, the inclined channel generates negative pressure on the outflow side of the main valve outlet to enable the main valve core to move towards the main valve inlet so as to enable the main valve inlet and the main valve outlet to be mutually communicated.

Further, the main valve cavity is divided into a first passage chamber, a return chamber, a push chamber, a second passage chamber, and an expansion chamber in sequence in a direction from a first end of the main valve body in the axial direction toward a second end of the main valve body in the axial direction, respective calibers of the first passage chamber and the second passage chamber are smaller than respective calibers of the return chamber, the push chamber, and the expansion chamber, the main valve body is in sealing engagement with peripheral walls of the first passage chamber and the second passage chamber, the main valve body has a ring protrusion in sealing engagement with the peripheral wall of the main valve cavity, one side of the ring protrusion is the return chamber, the other side of the ring protrusion is the push chamber, the first end of the main valve body is directed toward the main valve inlet, the second end of the main valve body is directed toward the main valve outlet, a main valve body cavity is provided inside the main valve body, the first end of the main valve body has a main valve body port for communicating the main valve inlet and the main valve body cavity, a valve body side wall hole for communicating the main valve body cavity with the main valve body inlet and the main valve body cavity is provided on a side wall of the second end of the main valve body, and a side wall hole for communicating the main valve body is provided on the main valve body for communicating the main valve body.

Further, the large-flow gate valve assembly comprises a gasket, the magnetic member is a magnetic ring, the gasket and the magnetic ring are sequentially installed in the expansion chamber along a direction from the first axial end of the main valve body to the second axial end of the main valve body, and when the fluid inlet and the fluid outlet of the micro control valve are isolated from each other, the main valve core enters and blocks the inner hole of the gasket through the magnetic attraction of the magnetic ring.

Further, the end part of the inner hole of the gasket, which faces the main valve core, is provided with an inclined surface, the second end of the main valve core forms a conical head part, and when the fluid inlet and the fluid outlet of the micro control valve are isolated from each other, the conical head part is in sealing fit with the inclined surface to enable the conical head part to block the inner hole of the gasket.

Furthermore, a ball and a clamp spring are arranged in the side pushing hole, the clamp spring presses the ball to block the port of the side pushing hole close to the main valve core cavity, and fluid entering the main valve core cavity can push the ball to unblock the port of the side pushing hole.

Further, the large flow gate valve assembly includes a cushion washer mounted on a peripheral wall of the second passage chamber, the cushion washer being exposed in the expansion chamber.

Further, the inner cavity is sequentially divided into a first cavity, a small-path cavity and a second cavity along the direction from the first end of the valve housing in the axial direction to the second end of the valve housing in the axial direction, and the aperture of the small-path cavity is smaller than the respective apertures of the first cavity and the second cavity;

the magnetic assembly comprises a magnetic ring, the micro-control valve comprises a sealing ring, the sealing ring and the magnetic ring are sequentially arranged in the second cavity along the direction from the second axial end of the valve housing to the first axial end of the valve housing, and the inner holes of the sealing ring and the magnetic ring are communicated with the small-path cavity.

Further, the valve core assembly comprises a valve sleeve and a needle valve core, a valve sleeve cavity is formed inside the valve sleeve, the valve sleeve is movably installed in the first cavity along the axial direction of the valve shell and is in sealing fit with the peripheral wall of the first cavity, the needle valve core is movably installed in the valve sleeve cavity along the axial direction of the valve shell, the first end of the needle valve core faces the fluid inlet, the second end of the needle valve core extends out of the valve sleeve and faces the fluid outlet, a valve core channel is formed inside the needle valve core, the first end of the needle valve core is provided with a valve core port enabling the fluid inlet to be communicated with the valve core channel, and a side through hole communicating the valve core channel with the outside of the needle valve core is formed in the side wall of the second end of the needle valve core.

Further, the magnetic force component still includes magnetic flow generating device, magnetic flow generating device sets up the axial first end of valve case, when magnetic flow generating device did not produce the magnetic flow, valve sleeve spare and needle valve core pass through magnetic ring magnetism is inhaled and is made the second end of needle valve core blocks up the hole of sealing washer, when magnetic flow generating device produced the magnetic flow, valve sleeve spare and needle valve core pass through magnetic flow generating device magnetism is inhaled and is kept away from the magnetic ring, so that the case passageway passes through the side through-hole sealing washer and magnetic ring respective hole with fluid outlet intercommunication.

Further, the first chamber forms a first buffer chamber between the valve sleeve and the small-bore chamber, a piston portion is disposed on the periphery of the needle valve core, the piston portion is accommodated in the valve sleeve chamber, the valve sleeve chamber forms a second buffer chamber on one side of the piston portion facing the fluid outlet, and the valve sleeve chamber forms a third buffer chamber on one side of the piston portion facing the fluid inlet.

The application provides a large-traffic gate valve subassembly's beneficial effect lies in:

in the large-flow gate valve assembly provided by the invention, the on-off of the large flow valve (the main valve body and the main valve core) can be quickly and efficiently controlled by the on-off of the micro control valve controlled by magnetic force, and the large flow valve core can be driven to move by extremely small flow, so that the problem of reliable control of the fluid under medium and high pressure can be reliably solved by using a low-cost and simple mechanism. And the transmission parts are all arranged in the closed cavity of the micro control valve, so that the sealing loss is better avoided.

The micro-control valve enables the valve core component to move in the inner cavity along the axial direction of the valve shell under the magnetic attraction action of the magnetic component so as to isolate or communicate the fluid inlet and the fluid outlet, so that the on-off control of the micro-control valve is formed, a spring component is not required to be arranged, the return is reliable, organic material sealing elements such as rubber are not required to be arranged, and the action resistance is small; low machining precision, few parts, no leakage and the like. The key contradiction between mechanical elastic reset and movable piece sealing loss is solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of a high flow gate valve assembly during opening of a main spool according to an embodiment of the present application;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a perspective view, with a cutaway view, of a high flow gate valve assembly provided by an embodiment of the present application;

FIG. 4 is a cross-sectional view of a high flow gate valve assembly in a main valve chamber closed condition as provided by an embodiment of the present application;

FIG. 5 is a cross-sectional view of a high flow gate valve assembly in a fully open state of a main spool as provided by an embodiment of the present application;

FIG. 6 is a cross-sectional view of a micro-control valve in a high flow gate valve assembly provided in accordance with an embodiment of the present application;

FIG. 7 is an enlarged view taken at A in FIG. 6;

FIG. 8 is a perspective view, with cutaway view, of a micro-control valve in a high flow gate valve assembly provided by an embodiment of the present application;

FIG. 9 is a physical model stress analysis diagram of a high flow gate valve assembly provided in an embodiment of the present application;

FIG. 10 is a cross-sectional view taken along line FT-FT in FIG. 9;

FIG. 11 is a cross-sectional view taken along line ZY-ZY in FIG. 9;

FIG. 12 is a graphical representation of the relationship of positive pressure to counterthrust bearing surfaces of the physical model provided herein.

Reference numerals referred to in the above figures are detailed below:

1-a magnetic ring; 2-sealing ring; 3-a first buffer chamber; 4-a second buffer chamber; 5-a third buffer chamber; 6-first interface nut; 7-a second interface nut; 8-a magnetic member; 9-inclined channels; 10-a gasket; 11-beads; 12-a clamp spring; 13-a first control tube; 14-a second control tube; 15-a buffer ring; 16-rubber seal ring; 21-an inclined wall; 100-a valve housing; 101-a fluid inlet; 102-a fluid outlet; 103-a first cavity; 104-small-path cavity; 105-a second cavity; 200-needle valve core; 201-a spool passage; 202-a valve element port; 203-side vias; 204-a cone head; 205-a piston portion; 300-a magnetic flux generating device; a 301-U shaped flux piece; 302-a coil; 303-a coil housing; 400-a valve kit; 401-a valve housing body; 402-an end cap; 500-main valve body; 501-main valve inlet; 502-main valve outlet; 503-a first menstrual chamber; 504-a return chamber; 505-a push chamber; 506-a second path chamber; 507-an expansion chamber; 600-main spool; 601-a main valve core chamber; 602-primary side holes; 603-side pushing holes; 604-conical head portion; 605-main spool orifice; 606-Ring convex.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In order to explain the technical solutions described in the present application, the following detailed description is made with reference to specific drawings and examples.

Referring to fig. 1 to 3 and 6 to 8, an embodiment of the present invention provides a large flow gate valve assembly, and especially focuses on-off control of a medium-high pressure large flow gate valve, where the large flow gate valve assembly includes:

a main valve body 500, a main valve cavity is provided inside the main valve body 500, a first axial end of the main valve body 500 forms a main valve inlet 501 communicated with the main valve cavity, a second axial end of the main valve body 500 forms a main valve outlet 502 communicated with the main valve cavity, an inclined channel 9 is provided on the main valve body 500, one end of the inclined channel 9 faces to the outside of the main valve body 500, the other end of the inclined channel 9 faces to the inside of the main valve body 500 and is communicated to the main valve outlet 502, the inclined channel 9 and the axial direction of the main valve outlet 502 form an acute angle, which is similar to the principle of venturi effect, or the inclined channel 9 directly adopts venturi effect, and the principle of venturi effect will be further detailed below;

a magnetic element 8, installed in the main valve chamber,

a main spool 600 mounted in the main valve chamber, main spool 600 being movably mounted in the main valve chamber in the axial direction of main valve body 500;

a micro control valve comprising a magnetic assembly, a valve housing 100 having an inner cavity, and a valve core assembly disposed in the inner cavity, a first axial end of the valve housing 100 forming a fluid inlet 101 communicating with the inner cavity, a second axial end of the valve housing 100 forming a fluid outlet 102 communicating with the inner cavity, the valve core assembly being magnetically attracted by the magnetic assembly to move in the inner cavity along the axial direction of the valve housing 100 to isolate or communicate the fluid inlet 101 and the fluid outlet 102 from each other, the fluid inlet 101 leading to a main valve cavity, and the fluid outlet 102 leading to a main valve outlet 502 through an inclined channel 9;

when the fluid inlet 101 and the fluid outlet 102 of the micro control valve are isolated from each other, the main valve outlet 502 is closed by the main spool 600 due to the magnetic attraction of the magnetic member 8 and the fluid thrust entering the main valve chamber, and when the fluid inlet 101 and the fluid outlet 102 of the micro control valve are communicated with each other, the inclined passage 9 generates a negative pressure on the outflow side of the main valve outlet 502 to move the main spool 600 toward the main valve inlet 501 to communicate the main valve inlet 501 and the main valve outlet 502 with each other.

In the large-flow gate valve assembly provided by the invention, the on-off of the large flow valve (the main valve body 500 and the main valve core 600) can be quickly and efficiently controlled by the on-off of the micro-control valve controlled by magnetic force, and the large-flow valve core can be driven to move by extremely small flow, so that the problem of reliable control of fluid under medium and high pressure can be reliably solved by using a low-cost and simple mechanism. And the transmission parts are all arranged in the closed cavity of the micro control valve, so that the sealing loss is better avoided.

The micro-control valve enables the valve core component to move in the inner cavity along the axial direction of the valve shell 100 under the magnetic attraction effect of the magnetic component so as to isolate or communicate the fluid inlet 101 and the fluid outlet 102, so that the on-off control of the micro-control valve is formed, a spring component is not required to be arranged, the return is reliable, organic material sealing elements such as rubber are not required to be arranged, and the action resistance is small; low machining precision, few parts, no leakage and the like. The key contradiction of mechanical elastic reset and movable part sealing loss is solved.

According to an embodiment of the present invention, a main valve chamber is divided into a first passage chamber 503, a return chamber 504, a push chamber 505, a second passage chamber 506, and an expansion chamber 507 in this order in a direction from a first end of the main valve body 500 in the axial direction toward a second end of the main valve body 500 in the axial direction, respective calibers of the first passage chamber 503 and the second passage chamber 506 are smaller than respective calibers of the return chamber 504, the push chamber 505, and the expansion chamber 507, the main valve 600 is in sealing engagement with peripheral walls of the first passage chamber 503 and the second passage chamber 506, a rubber seal 16 may be mounted on the peripheral wall of the first passage chamber 503 to be in sealing contact with the main valve 600 for one round, the main valve 600 has a ring protrusion 606 in sealing engagement with the peripheral wall of the main valve chamber, one side of the ring protrusion 606 is the return chamber 504, the other side of the ring protrusion 606 is the push chamber 505, the first end of the main valve 600 faces the main valve inlet 501, the second end of the main valve 600 faces the main valve outlet 502, the main valve 600 has a main valve chamber 601, the first end of the main valve 600 has a side port 601 through which communicates with the main valve chamber 501, and the main valve chamber 600, a side wall 601 of the main valve 600 is opened with a one-way hole 601, and the side wall 601 of the main valve chamber 601, the main valve 600 is opened on which the side of the main valve chamber 601, and the side wall 601, the main valve 600 is communicated with the main valve chamber 601, and the main valve 600.

The invention adopts the principle of Venturi effect tube: when the rapid fluid passes through the acute angle bypass branch channel, a negative pressure area which is far lower than the pressure value of the fluid is formed in the vicinity of the change of the turning direction. Therefore, the pressure of the push chamber is always higher than the venturi outlet, and the main spool 600 keeps moving to the right end. However, since the micro-control valve flow is small, the return air chamber is compressed slowly and main spool 600 is limited to a low speed.

Referring to fig. 1 and 3, according to an embodiment of the present invention, the large flow gate valve assembly includes a gasket 10, the magnetic member 8 is a magnetic ring, the magnetic ring is preferably a neodymium-iron strong magnetic ring, the gasket 10 is preferably a main copper gasket, the gasket 10 and the magnetic ring are sequentially installed in the expansion chamber 507 in a direction from a first end of the main valve body 500 in an axial direction toward a second end of the main valve body 500 in the axial direction, and when the fluid inlet 101 and the fluid outlet 102 of the micro control valve are isolated from each other, the main valve body 600 enters and blocks an inner hole of the gasket 10 by magnetic attraction of the magnetic ring.

Referring to fig. 1, according to an embodiment of the present invention, an inner hole of a gasket 10 has an inclined surface toward an end of a main valve 600, a second end of the main valve 600 forms a tapered head portion 604, and when a fluid inlet 101 and a fluid outlet 102 of a micro control valve are isolated from each other, the tapered head portion 604 is in sealing engagement with the inclined surface so that the tapered head portion 604 blocks the inner hole of the gasket 10.

Referring to fig. 2, according to an embodiment of the present invention, a ball 11 and a snap spring 12 are disposed in the side push hole 603, the snap spring 12 presses the ball 11 toward and blocks a port of the side push hole 603 close to the main spool cavity 601, and the fluid entering the main spool cavity 601 can push the ball 11 to unblock the port of the side push hole 603, of course, the side push hole 603 that makes the main spool cavity 601 communicated to the push chamber 505 in one way may also be in other forms similar to a one-way valve, and is not limited to the structure of the ball 11 and the snap spring 12, and the purpose thereof is to prevent the fluid in the push chamber 505 from flowing back to the main spool cavity 601.

Referring to fig. 1, in addition, the large flow gate valve assembly includes a cushion ring 15 installed on the peripheral wall of the second passage chamber 506, the cushion ring 15 being exposed to the expansion chamber 507, the cushion ring 15 being preferably a copper washer, which serves a cushioning function when the main spool 600 is right-shifted to touch.

Referring to fig. 6, according to an embodiment of the present invention, the inner chamber is divided into a first chamber 103, a small-diameter chamber 104, and a second chamber 105 in order in a direction from a first end of the valve housing 100 in the axial direction toward a second end of the valve housing 100 in the axial direction, and the diameter of the small-diameter chamber 104 is smaller than the respective diameters of the first chamber 103 and the second chamber 105;

the magnetic assembly comprises a magnetic ring 1, a neodymium iron strong magnetic ring is preferred, the micro control valve comprises a sealing ring 2, a copper ring is preferred, the micro control valve is particularly made of pure copper, the through section of the micro control valve is a pure copper ring, so that the machining requirement of a sliding surface is low, the micro control valve can be manufactured into a low-precision durable valve, the sealing ring 2 and the magnetic ring 1 are sequentially arranged in a second cavity 105 along the direction from the second axial end of the valve shell 100 to the first axial end of the valve shell 100, and inner holes of the sealing ring 2 and the magnetic ring 1 are communicated with a small through-diameter cavity 104.

Referring to fig. 6 and 7, according to one embodiment of the present invention, the valve core assembly includes a valve sleeve member 400 and a needle valve core 200, the valve sleeve member 400 forms a valve sleeve cavity inside, the valve sleeve member 400 is movably installed in the first cavity 103 along the axial direction of the valve housing 100 and is in sealing engagement with the peripheral wall of the first cavity 103, the needle valve core 200 is movably installed in the valve sleeve cavity along the axial direction of the valve housing 100, a first end of the needle valve core 200 faces the fluid inlet 101, a second end of the needle valve core 200 protrudes out of the valve sleeve member 400 and faces the fluid outlet 102, the needle valve core 200 has a valve core channel 201, the first end of the needle valve core 200 has a valve core port 202 communicating the fluid inlet 101 with the valve core channel 201, a side through hole 203 communicating the valve core channel 201 with the outside of the needle valve core 200 is provided on the side wall of the second end of the needle valve core 200, the side through hole 203 is preferably plural, so that when the valve sleeve member 400 and the needle valve core 200 are magnetically attracted away from the magnetic ring 1 by the magnetic flux generating device 300, the fluid in the valve core 201 flows out of the needle valve core 200 from the plural side through holes 203.

Preferably, the valve sleeve 400 and the needle valve cartridge 200 are both magnetic members that are easily attracted by the magnetic assembly, but it is possible to install the magnetic members even though the magnetic members are part of the valve sleeve 400 and the needle valve cartridge 200 themselves.

Referring to fig. 6 and 8, according to an embodiment of the present invention, the magnetic assembly further includes a magnetic flux generating device 300, the magnetic flux generating device 300 is disposed at a first axial end of the valve housing 100, when the magnetic flux generating device 300 does not generate magnetic flux, the valve sleeve 400 and the needle valve core 200 are magnetically attracted by the magnetic ring 1 to make the second end of the needle valve core 200 block the inner hole of the sealing ring 2, and when the magnetic flux generating device 300 generates magnetic flux, the valve sleeve 400 and the needle valve core 200 are magnetically attracted away from the magnetic ring 1 by the magnetic flux generating device 300 to make the valve core channel 201 communicate with the fluid outlet 102 through the side through hole 203, the respective inner holes of the sealing ring 2 and the magnetic ring 1.

Referring to fig. 8, according to the preferred embodiment of the present invention, the magnetic flux generating device 300 includes a U-shaped magnetic flux member 301 disposed at a first axial end of the valve housing 100, and a coil 302 wound around the U-shaped magnetic flux member 301 (e.g., U-shaped iron), wherein a coil housing 303 may be mounted outside the coil 302 to protect and seal the coil 302, the first axial end of the valve housing 100 is located in a gap of the U-shaped magnetic flux member 301, and the U-shaped iron becomes an electromagnet after the coil 302 is energized.

Referring to fig. 7, according to an embodiment of the present invention, the end of the inner hole of the sealing ring 2 facing the needle valve element 200 is provided with an inclined wall 21, the second end of the needle valve element 200 is formed with a tapered head 204, when the magnetic flux generating device 300 does not generate magnetic flux, the tapered head 204 is in sealing fit with the inclined wall 21 so that the tapered head 204 blocks the inner hole of the sealing ring 2, and the tapered head 204 is in sealing fit with the inclined wall 21, which is equivalent to the tapered head 204 being in fit with the tapered surface, so as to form a tight and reliable sealing fit.

Referring to fig. 7, according to an embodiment of the present invention, the first chamber 103 forms a first buffer chamber 3 between the valve sleeve 400 and the small bore chamber 104, the piston portion 205 is disposed on the outer periphery of the needle valve spool 200, the piston portion 205 is received in the valve sleeve chamber, the valve sleeve chamber forms a second buffer chamber 4 on the side of the piston portion 205 facing the fluid outlet 102, and the valve sleeve chamber forms a third buffer chamber 5 on the side of the piston portion 205 facing the fluid inlet 101, so that the first buffer chamber 3, the second buffer chamber 4 and the third buffer chamber 5 can provide a buffer effect during the movement of the needle valve spool 200 and the valve sleeve 400, and thus the corresponding components in the micro control valve can be greatly protected from collision and abrasion.

Referring to fig. 7 and 8, according to one embodiment of the present invention, the valve sleeve assembly 400 includes a valve sleeve body 401 and an end cap 402 mounted to the valve sleeve body 401, the valve sleeve body 401 and the end cap 402 together define a valve sleeve chamber, the valve sleeve body 401 has a valve sleeve hole for extending the second end of the needle valve core 200, the end cap 402 has an end cap hole for extending the first end of the needle valve core 200, and the end cap 402 is preferably connected to the valve sleeve body 401 in a threaded manner, although other detachable connections of the end cap 402 and the valve sleeve body 401 are also possible.

Referring to fig. 6 and 8, according to an embodiment of the present invention, the micro control valve further includes a first interface nut 6 threadedly coupled to the fluid inlet 101 and a second interface nut 7 threadedly coupled to the fluid outlet 102, and specifically, both ends of the first interface nut 6 have external threads, the external threads of one end of the first interface nut 6 are coupled to the internal threads of the fluid inlet 101, the external threads of the other end of the first interface nut 6 are coupled to one end of a first control pipe 13, the other end of a second control pipe 14 is coupled to the return chamber 504, both ends of the second interface nut 7 have external threads, the external threads of one end of the second interface nut 7 are coupled to the internal threads of the fluid outlet 102, the external threads of the other end of the second interface nut 7 are coupled to the second control pipe 14, and the other end of the second control pipe 14 is coupled to the inclined passage 9.

The operation of the micro-control valve of the present invention will be described in detail below (for the sake of understanding, the first axial end of the valve housing 100 may be referred to as a right end, and the second axial end of the valve housing 100 may be referred to as a left end, according to the orientation in the drawings):

and (3) a complete shut-off state of the micro control valve: fluid medium at the right end enters the inner cavity of the valve housing 100 from the fluid inlet 101, the fluid pressure pushes the needle valve core 200 and the valve sleeve 400 simultaneously, the volume of the first buffer cavity 3 is compressed to the minimum, the conical head 204 of the needle valve core 200 tightly pushes against the copper ring, meanwhile, the ferromagnetic ring of rubidium strongly sucks the needle valve core 200, the inner cavity of the micro control valve is closed, and the fluid medium in the inner cavity cannot flow to the fluid outlet 102.

The initial opening state of the micro-control valve: after the U-shaped iron is electrified, magnetic flux suction force generated by the U-shaped iron overcomes the medium pressure and the strong rubidium ferromagnetic ring suction force, acts on the valve core assembly to move towards the right end, a small amount of medium fluid in the valve core channel 201 enters the inner holes of the strong rubidium ferromagnetic ring and the copper ring to the fluid outlet 102 through the side through hole 203 of the needle valve core 200, and the space of the first buffer cavity 3 cannot expand rapidly, so that the movement speed of the valve core assembly is limited.

Opening and decelerating states of the micro-control valve: the spool assembly is increased by electromagnetic attraction and continuously moves rightwards, the volume of the first buffer cavity 3 is increased, the pressure in the first buffer cavity continues to be reduced, the spool assembly is prevented from accelerating, meanwhile, the second buffer cavity 4 cannot be expanded quickly, the third buffer cavity 5 cannot be compressed quickly, the needle spool 200 is limited in moving rightwards, and a small amount of medium fluid in the spool channel 201 continues to flow from the fluid inlet 101 to the fluid outlet 102.

The micro-control valve is opened in an acceleration state: the medium fluid in the valve core channel 201 enters the first buffer chamber 3 from the side through hole 203 of the needle valve core 200, the negative pressure in the space disappears, the valve core assembly accelerates to the right end, meanwhile, the needle valve core 200 is separated from the small-diameter chamber 104, and the medium fluid channel is opened greatly.

The micro-control valve is in a complete opening state: when the valve core assembly moves to the right limit position, the electromagnetic suction force is the largest at the moment, the position of the valve core assembly is kept, the medium fluid completely flows through the valve core channel 201, the inner holes of the side same hole, the strong rubidium ferromagnetic ring and the copper ring to the fluid outlet 102 and is released from the fluid outlet 102, the volume of the second buffer cavity 4 is compressed to the minimum, the volume of the third buffer cavity 5 is maintained to the maximum, and when the pressure at the right end jumps, the second buffer cavity 4 and the third buffer cavity 5 can eliminate the left-right vibration of the needle valve core 200.

The micro-control valve is in a power-off starting state: when the shutdown needs to be controlled, the electromagnet is firstly de-energized, and the medium fluid entering from the fluid inlet 101 pushes the valve core assembly to rapidly move leftwards until the valve core assembly approaches the small-diameter port.

The micro-control valve is in a deceleration closing state: after the fluid entering from the fluid inlet 101 pushes the needle valve core 200 leftwards to enter the small-diameter port, the first buffer cavity 3 is compressed, the pressure is increased, and the speed is reduced when the pressure acts on the valve core assembly. Then, the needle valve element 200 continues to move left, the second buffer chamber 4 is compressed, and the pressure in the second buffer chamber 4 rises; the third buffer cavity 5 generates negative pressure, the pressure in the second buffer cavity 4 and the negative pressure in the third buffer cavity 5 jointly act on the needle valve core 200 to generate reaction force pointing to the right end, the needle valve core 200 is limited to be at low speed, and finally the needle valve core 200 contacts with an inner hole of a copper ring to form conical surface sealing, and a medium channel is completely closed. When the pressure is reduced, the strong neodymium iron magnetic ring 1 attracts the needle valve core 200 to maintain the conical surface sealing.

The working principle of the large flow gate valve assembly provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings (for convenience of understanding, according to the orientation of the drawing, a first axial end of the main valve body 500 may be referred to as a right end, and a second axial end of the main valve body 500 may be referred to as a left end):

referring to fig. 4, main valve chamber closed state: when the micro control valve is not turned on (i.e. the fluid inlet 101 and the fluid outlet 102 of the micro control valve are isolated from each other), the medium pressure at the end of the main valve inlet 501 causes the main valve plug 600 to move left, the conical head 604 of the main valve plug 600 presses the main copper pad, meanwhile, the main valve plug 600 is also attracted by the neodymium-iron strong magnetic ring, finally, a reliable sealing surface is formed with the main copper pad, the main valve inlet 501 and the main valve outlet 502 are completely isolated from each other, and the fluid is turned off. At this time, the medium fills the push chamber 505 and the return chamber 504 along the side push hole 603 and the contact clearance face between the main valve body 500 and the main valve element 600, and pressure equilibrium is achieved. Main spool 600 remains in the left position.

Referring to fig. 1, main spool 600 opening process: the micro-control valve is switched on after electromagnetism is electrified, and the flow direction of the first path of small pressure is as follows: the main valve inlet 501 → the main spool chamber 601 → the side push hole 603 → the ball 11 gap → the push chamber 505, and then the piston of the main spool 600 moves rightward, returning the fluid in the air chamber → the first control tube 13 → the micro control valve → the second control tube 14 → the slant passage 9 → the main valve outlet 502. The second main pressure flow direction is as follows: main valve inlet 501 → main spool chamber 601 → main side hole 602 → expansion chamber 507 → inner hole where gasket 10 and the magnetic ring are given → main valve outlet 502.

Referring to fig. 5, when main spool 600 is fully opened, the micro control valve remains on, main spool 600 continues to move to the right, the main valve chamber is nearly fully opened, the pressure difference between main valve inlet 501 and main valve outlet 502 becomes small, the pressure difference between push chamber 505 and return chamber 504 becomes small in synchronization, and the speed of moving to the right of main spool 600 approaches zero (the movement of main spool 600 is almost stopped). At this time, the main valve chamber is in a fully open state. In extreme conditions, if the main valve inlet 501 pressure is much greater than the main valve outlet 502 pressure, main spool 600 will slowly approach the buffer copper pad, reaching the right limit.

Main spool 600 closing process: and the micro-control valve is powered off, and the inner cavity of the micro-control valve is closed. Push chamber 505 is pressure balanced with return chamber 504 and the total force pushes main spool 600 to the left. The fluid medium in the push chamber 505 cannot return to the main spool chamber 601 (due to the one-way flow guiding effect of the side push holes 603), the push chamber 505 is compressed, and the pressure is increased. At the same time, the return chamber 504 is stretched and the pressure becomes lower. Both of these components generate a force component acting on main poppet 600, pointing to the right. Thus, main spool 600 is limited to left travel speeds, slowly approaching the main copper pad. Meanwhile, the neodymium iron strong magnetic ring attracts, the main valve element 600 returns to the position of the left limit until the main copper pad is pressed, and therefore the closing action of the main valve element 600 is completed.

Referring to fig. 4, main spool 600 is fully closed: the micro control valve remains closed, pushing chamber 505 and return chamber 504, which communicate through a gap, to achieve pressure balance. Main spool 600 maintains the left end position. Under the action of fluid pressure and strong magnetic ring attraction, the contact surface between the main valve element 600 and the main copper pad is tightly attached to form a sealing surface, and the main valve inlet 501 and the main valve outlet 502 are completely isolated and closed.

In the action process, the medium pressure of the pushing chamber 505 and the medium pressure of the returning chamber 504 keep gradually changed volume spaces under the condition of sudden change in any direction, so that the moving speed of the main valve element 600 is limited, the left limit and the right limit tend to slow, and the impulse impact phenomenon is prevented. Therefore, the large-flow gate valve assembly provided by the invention can be well suitable for pipeline control of steady state and pressure jump and has good action response performance.

Referring to fig. 9 to 12, the following is a demonstration of the feasibility and beneficial effects of the large flow gate valve assembly provided by the present invention:

according to the pressure conversion formula, 0.1 megapascal =1.0197162 kilogram force/square centimeter. I.e. about 1 kg of pressure increase per square centimeter for every 0.1 mpa rise in pressure. If the pressure is 6.4-10MPa, the pressure of the inner cavity of the main valve body 500 reaches 65-102 kg/square centimeter. Therefore, when the main valve element 600 is in static shutdown, the pressure of the positive surface is approximately equal to (65-102) the valve element stress area, and according to the approximate calculation of the large-flow valve element opening area, a small section is taken, usually 65-102 square centimeters are reached, and the stress value is 200-2000 kilograms. It is clear that if the reverse thrust is to be greater than this forward force value by means of electromagnetic forces, the electromagnetic power capacity and the strength of the transmission member must be very high. Therefore, direct control is difficult to achieve by electromagnetic means due to the material strength and large moment.

By analyzing the closed state of the valve core, the invention adopts the following design process to obtain a proper control method: the original physical model is first introduced, pushing main spool 600 axially. The forced element of the valve core is composed of the following components: A. a positive stress surface, a reverse thrust stress surface, a permanent magnetic suction force and a friction resistance.

From the circular and annular equations, the following calculations are derived:

positive pressure force-bearing surface-piston effective area (solid surface) Sr =3.14 × r ^2;

thrust reverser face-piston maximum area (torus) Sd =3.14 (R ^2-R ^ 2);

calculating the area by the reverse thrust resultant force: the area difference C = Sd-Sr;

r: the maximum radius of the piston of the thrust-resisting bearing surface is a set value

Introducing a correction reverse-thrust ratio: t = (Sd-Sr)/Sd, and the value range is 0.05-0.3. After the assignment is set, the percentage of the control surface area difference in the torus restrains the amplitude of the reverse thrust resultant force, and the higher the T value is, the larger the area difference is, the higher the reverse thrust resultant force is. Positively correlated with the maximum radius. At the same time, a given value of R is derived from R.

From the above, it follows:

r is the effective radius of the piston on the positive pressure bearing surface, R = ((R ^2-T ^ R ^ 2)/(2-T)) ^0.5

D = R-R width of the ring.

fm is the resultant force of the frictional resistance and the permanent magnetic attraction, and fm = the data measured by the experiment.

Combined from the above equations, the following derivation results: resultant push force = pressure x area difference-fm.

Opening driving resultant force = F = P C-fm = P (Sd-Sr) -fm

＝P*{3.14*(R^2-r^2)-3.14*r^2)}-fm

＝3.14*P*(R^2-2*r^2)-fm

F: newton, N

P: pressure, KG/m 2

When the R value and the T value are specified, the above result is obtained, when the R value and the T value are greater than zero, the reverse motion can be realized, the valve core is pushed along the axial direction, and the on-off control is completed.

The table of FIG. 12 is derived when values for T and R are assigned using typical specification parameters for the engineering material. And intuitively displaying that the value of R follows the variation trend of R and the variation range of the area difference when the T (value is 0.05-0.16) is controlled to control the amplitude of the reverse thrust resultant force. In addition, it can be estimated that setting the width of the annulus to approximately 1/2 of the radius of the positive pressure bearing surface can satisfy the reverse thrust of main poppet 600.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high flow gate valve assembly, comprising:

a magnetic member installed in the main valve chamber,

a micro control valve including a magnetic assembly, a valve housing having an inner cavity, and a valve core assembly disposed in the inner cavity, a first axial end of the valve housing forming a fluid inlet communicating with the inner cavity, a second axial end of the valve housing forming a fluid outlet communicating with the inner cavity, the valve core assembly being magnetically attracted by the magnetic assembly to move in the inner cavity in an axial direction of the valve housing to isolate or communicate the fluid inlet and the fluid outlet from each other, the fluid inlet opening into the main valve cavity, the fluid outlet opening into the main valve outlet through an inclined passage, the inclined passage being directed toward an outflow side of the main valve outlet and disposed at an acute angle to the axial direction of the main valve outlet;

when the fluid inlet and the fluid outlet of the micro control valve are isolated from each other, the main valve core blocks the main valve outlet through the magnetic attraction of the magnetic part and the fluid thrust entering the main valve cavity, and when the fluid inlet and the fluid outlet of the micro control valve are communicated with each other, the inclined channel generates negative pressure on the outflow side of the main valve outlet to enable the main valve core to move towards the main valve inlet so as to enable the main valve inlet and the main valve outlet to be communicated with each other.

2. The high flow rate gate valve assembly according to claim 1, wherein the main valve chamber is divided into a first passage chamber, a return chamber, a push chamber, a second passage chamber, and an expansion chamber in this order in a direction from a first end of the main valve body in the axial direction toward a second end of the main valve body in the axial direction, the first passage chamber and the second passage chamber each having a smaller diameter than the respective diameters of the return chamber, the push chamber, and the expansion chamber, the main valve body is sealingly fitted to the circumferential walls of the first passage chamber and the second passage chamber, the main valve body has a ring protrusion sealingly fitted to the circumferential wall of the main valve chamber, one side of the ring protrusion is the return chamber, the other side of the ring protrusion is the push chamber, a first end of the main valve body is directed to the main valve inlet, a second end of the main valve body is directed to the main valve outlet, the main valve body has a main valve chamber inside, the first end of the main valve body has a valve body port for communicating the main valve inlet with the main valve body chamber, a main valve body port for communicating the main valve body chamber with the main valve body chamber is provided on a side wall, and a main valve body side hole for communicating with the main valve body side wall is provided on a side hole for communicating the main valve body.

3. The high flow gate valve assembly of claim 2, wherein said high flow gate valve assembly includes a washer, said magnetic member is a magnetic ring, said washer and said magnetic ring are sequentially installed in said expansion chamber in a direction from a first axial end of said main valve body toward a second axial end of said main valve body, and when a fluid inlet and a fluid outlet of said micro control valve are isolated from each other, said main valve plug is magnetically attracted by said magnetic ring to enter and block an inner bore of said washer.

4. The high flow gate valve assembly of claim 3, wherein the bore of the gasket has an angled surface toward the end of the main spool, the second end of the main spool forming a tapered head, the tapered head sealingly engaging the angled surface such that the tapered head blocks the bore of the gasket when the fluid inlet and the fluid outlet of the micro-control valve are isolated from each other.

5. The high flow gate valve assembly according to claim 2, wherein a ball and a snap spring are disposed in the side push hole, the snap spring presses the ball toward and blocks the port of the side push hole close to the main valve core chamber, and fluid entering the main valve core chamber can push the ball to unblock the port of the side push hole.

6. The high flow gate valve assembly of claim 2, including a cushion gasket mounted on a peripheral wall of said second passage chamber, said cushion gasket being exposed in said expansion chamber.

7. The high flow gate valve assembly of claim 1, wherein the inner chamber is divided into a first chamber, a small-diameter chamber and a second chamber in order in a direction from the first axial end of the valve housing toward the second axial end of the valve housing, the small-diameter chamber having a smaller diameter than the respective first and second chambers;

8. The high flow gate valve assembly of claim 7, wherein the valve assembly includes a valve sleeve and a needle valve core, the valve sleeve forming a valve sleeve cavity therein, the valve sleeve being movably mounted in the first cavity in the axial direction of the valve housing and being in sealing engagement with the peripheral wall of the first cavity, the needle valve core being movably mounted in the valve sleeve cavity in the axial direction of the valve housing, a first end of the needle valve core facing the fluid inlet, a second end of the needle valve core protruding out of the valve sleeve and facing the fluid outlet, the needle valve core having a valve core channel therein, the first end of the needle valve core having a valve core port communicating the fluid inlet with the valve core channel, a side wall of the second end of the needle valve core having a side through hole communicating the valve core channel with an exterior of the needle valve core.

9. The high flow gate valve assembly of claim 8, wherein the magnetic assembly further comprises a magnetic flux generating device disposed at the axial first end of the valve housing, wherein when the magnetic flux generating device does not generate magnetic flux, the valve sleeve and the needle valve core are magnetically attracted by the magnetic ring to block the inner hole of the sealing ring at the second end of the needle valve core, and when the magnetic flux generating device generates magnetic flux, the valve sleeve and the needle valve core are magnetically attracted by the magnetic flux generating device to be away from the magnetic ring, such that the valve core channel communicates with the fluid outlet through the side through hole and the respective inner holes of the sealing ring and the magnetic ring.

10. The high flow gate valve assembly of claim 8, wherein the first chamber forms a first buffer chamber between the valve sleeve and the small bore chamber, the outer periphery of the needle spool being provided with a piston portion received in a valve sleeve chamber forming a second buffer chamber on a side of the piston portion facing the fluid outlet, the valve sleeve chamber forming a third buffer chamber on a side of the piston portion facing the fluid inlet.