CN115095702A - Upper-in and lower-out type vertical electromagnetic valve - Google Patents

Abstract

The invention relates to an upper-inlet and lower-outlet type vertical electromagnetic valve which comprises a valve body and an electromagnetic head arranged above the valve body, wherein an inlet pipe arranged on the valve body horizontally extends outwards from the side wall of the inlet side of a main body part of the valve body, then is bent upwards, an pipe opening is upward, an outlet pipe is led out downwards from the bottom of the main body part of the valve body, then extends along the horizontal extending direction of the inlet pipe, then is bent downwards, and the pipe opening is downward. The electromagnetic valve is suitable for a vertical mounting mode of upper inlet and lower outlet, the starting driving force of the electromagnetic head is large, the requirement on the driving force when the valve body is opened is low, and the electromagnetic valve can be used for large-diameter and ultrahigh-pressure pipelines for upper inlet and lower outlet and other suitable occasions.

Description

Upper-in and lower-out type vertical electromagnetic valve

Technical Field

The invention relates to an upper-inlet and lower-outlet type vertical electromagnetic valve.

Background

For example, chinese patent document CN105650329A discloses an ultrahigh pressure large diameter solenoid valve, which comprises a valve body and an electromagnetic head used as a driving device, wherein the valve body comprises a main valve body, a main valve cover, a middle cover and an upper cover, the main valve body and the main valve cover enclose a main valve cavity, wherein a vertical main valve flap guide sleeve is fixedly installed in the main valve middle cavity, a main valve flap is movably connected inside the main valve flap guide sleeve, a main valve seat is arranged between the main valve middle cavity and the main valve lower cavity, a main valve damping through hole is arranged at the lower part of the main valve flap, a middle valve seat is arranged between the middle valve middle cavity and the main valve upper cavity enclosed by the middle cover and the main valve cover, a middle valve seat is arranged between the middle valve middle cavity and the main valve upper cavity, a middle valve flap is arranged below the middle valve seat, and an auxiliary valve cavity is enclosed by the upper cover and the main valve cover, be equipped with vice disk seat between vice valve middle chamber and the vice valve outlet chamber, the top of vice disk seat is equipped with vice valve clack, the top at the valve body is installed to the electromagnetism head, the electromagnetism head is equipped with the iron core that moves that can reciprocate, still be equipped with quiet iron core, magnetism-isolating pipe and coil, magnetism-isolating pipe is equipped with the tube hole, quiet iron core all sets up in magnetism-isolating pipe's tube hole with moving the iron core, the coil sets up the outside at magnetism-isolating pipe, quiet iron core fixed mounting is on magnetism-isolating pipe's tube hole's upper portion, it is located quiet iron core's below to move the iron core, with magnetism-isolating pipe's tube hole's inner wall clearance fit. The electromagnetic valve has good sealing performance, is convenient to process and assemble, requires smaller driving force, and is particularly suitable for occasions requiring ultrahigh pressure and large caliber.

However, since the solenoid valve is limited by its internal structure and its corresponding operation mechanism, it can be installed only horizontally, and if it is installed on a vertical pipe, it cannot work normally whether the inlet side is facing upward or downward.

In addition, although the above-mentioned electromagnetic valve reduces the driving force requirement at the time of starting to a great extent by providing the pilot valve structure, because the distance (generally called as working air gap) between the static and moving iron cores is the largest when the electromagnetic head is powered on for starting, the driving force is the smallest, and the power requirement of the valve body at this time is influenced by various factors such as static friction and sealing force requirement, the power requirement at the time of starting is the largest, which requires the power output of the electromagnetic head when the power output is the smallest to meet the power requirement when the power requirement of the valve is the largest, thereby significantly increasing the volume and material cost of the electromagnetic head and also causing unnecessary energy consumption.

Disclosure of Invention

The invention aims to provide a vertical electromagnetic valve, which has an upward inlet and a downward outlet and is suitable for being installed and used on a corresponding vertical pipeline.

It is a further object of the present invention to increase the driving force of the electromagnetic head at start-up to reduce the electromagnetic head configuration.

The technical scheme of the invention is as follows: the vertical electromagnetic valve comprises a valve body and an electromagnetic head arranged above the valve body, wherein the valve body is provided with an upward bent inlet pipe and a downward bent outlet pipe, the pipe orifice of the inlet pipe faces upwards, and the pipe orifice of the outlet pipe faces downwards.

Preferably, the electromagnetic head installed above the valve body is vertical, and the moving mode of the movable iron core is vertical linear movement.

Preferably, the lower end of the movable iron core extends into the valve body of the valve body, and is connected with the opening and closing piece which needs to be driven by external force to drive the connected opening and closing piece to move up and down.

Preferably, the orifice of the inlet tube is located directly above the orifice of the outlet tube.

Preferably, the pipe orifice of the inlet pipe is positioned right above the pipe orifice of the outlet pipe, the inlet pipe is bent in a manner that the inlet pipe extends horizontally and outwards after being connected from the side surface of the valve body main body part and then is bent upwards to enable the pipe orifice to face upwards, the outlet pipe is bent in a manner that the inlet pipe extends in the horizontal extending direction of the inlet pipe after being connected from the bottom of the valve body main body part and then is bent downwards to enable the pipe orifice to face downwards, and the central axis of the pipe orifice of the inlet pipe and the central axis of the pipe orifice of the outlet pipe are vertical and positioned on the same straight line so as to be better suitable for installation on a vertical straight pipeline.

Preferably, the valve body adopts a pilot valve structure and is provided with a main sealing pair and an auxiliary sealing pair, the auxiliary sealing pair is positioned above the main sealing pair, an auxiliary valve flap in the negative sealing pair is positioned above an auxiliary valve seat, and the lower end of the movable iron core extends into the valve body and is connected with an auxiliary valve flap to drive the auxiliary valve flap to move up and down.

Preferably, the electromagnetic head is provided with an electromagnetic head shell, a coil, a movable iron core, a static iron core and a magnetism isolating pipe, wherein the coil, the movable iron core and the static iron core are vertically and coaxially arranged with the electromagnetic head shell, the coil is fixedly arranged on a coil frame around the outer side of the magnetism isolating pipe, the magnetism isolating pipe penetrates through a magnetism isolating pipe through hole on a bottom plate of the electromagnetic head shell, the top end of the magnetism isolating pipe is fixedly connected with a top plate of the electromagnetic head shell, the bottom end of the magnetism isolating pipe is positioned outside the electromagnetic head shell, the static iron core comprises a first static iron core and a second static iron core, the main body part of the first static iron core is tubular, the magnetism isolating pipe is sleeved on the outer side of the upper part of the magnetism isolating pipe and positioned between the coil and the magnetism isolating pipe, the lower end of the magnetism isolating pipe is lower than the lower end of the second static iron core, the second static iron core and the movable iron core are arranged in the magnetism isolating pipe, and the second iron core is fixedly arranged on the upper part of the magnetism isolating pipe, the movable iron core is located below the second static iron core and is in sliding fit with the inner wall of the magnetism isolating pipe, and a first working air gap is reserved between the top surface of the movable iron core and the lower end of the first static iron core under a normal state.

Preferably, the top of first quiet iron core is equipped with annular disc structure, and the top disc structure of first quiet iron core stretches out from the top of the main part of first quiet iron core radially outwards, its upper surface with the inboard surface laminating of the roof of electromagnetism head casing.

Preferably, a flux sleeve is arranged in the electromagnetic head shell, the flux sleeve is located at a connecting position of a bottom plate of the electromagnetic head shell and the magnetic isolation tube, a main body portion of the flux sleeve is in a sleeve shape and is sleeved on the magnetic isolation tube, the top height of the flux sleeve is lower than the top height of the moving iron core in a normal state, a circular disc-shaped structure is arranged at the bottom of the flux sleeve, the disc-shaped structure at the bottom of the flux sleeve extends out from the bottom end of the main body portion of the flux sleeve in the radial direction, and the lower surface of the flux sleeve is attached to the inner side surface of the bottom plate of the electromagnetic head shell.

Preferably, the electromagnetic head housing is composed of a main electromagnetic head housing with an open bottom and an electromagnetic head housing cover covering the main electromagnetic head housing with the open bottom.

Preferably, the top of the second stationary iron core is provided with a vertical screw, the vertical screw penetrates through a screw hole in the center of a top plate of the electromagnetic head shell, and a fastening nut is screwed on the outer side of the vertical screw and fastened with the electromagnetic head shell through the fastening nut.

Preferably, a junction box is mounted on the side wall of the electromagnetic head casing, a wiring terminal for connecting an external power supply cable is arranged in the junction box, and the wiring terminal is connected with the coil through a wire penetrating through the side wall of the electromagnetic head casing.

Preferably, the first working air gap normally has a vertical dimension of 2-3 mm.

Preferably, through the arrangement of the cross section of the first static iron core, the cross section of the second static iron core and the vertical size of the first working air gap and the second working air gap in a normal state, the suction force between the movable iron core and the static iron core when the movable iron core is started is 1.5-2.5 times of the suction force between the movable iron core and the static iron core when the top surface of the movable iron core and the lower end of the first static iron core are at the same height.

Preferably, a spiral spring disengaging device tending to push the movable iron core and the second static iron core away from each other in a suction state is arranged between the movable iron core and the second static iron core.

Preferably, the coil spring release device includes a coil spring and a release pin, the movable iron core is provided with a spring mounting hole located on the axis of the movable iron core, the release pin is in a cylindrical step shape with a thin top and a thick bottom, the top of the spring mounting hole is in a necking shape corresponding to the release pin, the inner diameter of the necking is slightly larger than the outer diameter of the upper portion of the release pin and smaller than the outer diameter of the lower portion of the release pin, the coil spring is located in the spring mounting hole and is in a pre-compression state, the top of the coil spring is pressed against the bottom of the release pin, and the bottom of the coil spring is pressed against the bottom of the spring mounting hole.

The invention has the beneficial effects that: because the inlet pipe and the outlet pipe which are correspondingly bent and have the pipe orifice orientations are arranged, the interface which is originally suitable for being connected with the horizontal pipeline is converted into the interface which is suitable for being connected with the vertical pipeline, under the condition that the internal structure and the working mechanism are not changed, the inlet is upward, the outlet is downward, the medium is allowed to flow from top to bottom, the valve is suitable for being installed and used on the vertical pipeline with the corresponding flow direction, and the normal work of the valve is ensured; because the inlet pipe and the outlet pipe can be used as one part of the valve body to be cast and processed together with other parts of the valve body, excessive cost is not required to be increased, and compared with a horizontal connection mode which adapts to a valve by changing the pipeline running direction on site, the valve has the advantages of simple structure, low cost, convenient construction, difficulty in failure and basically no increase of resistance; because the electromagnetic head is provided with the first static iron core and the second static iron core, and the first working air gap between the first static iron core and the movable iron core is obviously smaller than the second working air gap between the second static iron core and the movable iron core when the electromagnetic head is started, the suction force between the first static iron core and the movable iron core is obviously larger than the suction force between the second static iron core (equivalent to the static iron core of the existing electromagnetic head), thereby obviously increasing the power when the electromagnetic head is started, compared with the existing electromagnetic head, the electromagnetic head can drive a larger load by a smaller electromagnetic head, and simultaneously, when the movable iron core and the second static iron core are combined, the acting force between the first static iron core and the movable iron core is very small and can be basically ignored, and the change amplitude of the power is obviously reduced in the whole upward moving process of the movable iron core, so that the impact force generated when the movable iron core and the second static iron core are combined can be reduced, the service life can be prolonged, and unnecessary power consumption can be reduced; because first quiet iron core is established in the quiet iron core outside of second with the tubulose cover, the power that first quiet iron core produced (and move the suction between the iron core) and the power that the quiet iron core of second produced evenly distributed in week, the effect is unanimous, it is vertical upwards to be all, do not destroy the ascending equilibrium in week of magnetic field because of the setting of two quiet iron cores, and can suitably select the cross section size proportion of two quiet iron cores according to magnetic field characteristic, according to actual need rational distribution two quiet iron cores's magnetic flux, rationally set up the working air gap of first quiet iron core when starting, and then optimize the power change curve of electromagnetic head in whole actuation in-process, further improve dynamic characteristic. Through the improvement to quiet iron core, under the basically unchangeable condition of other parts, can obtain bigger start power/maximum power output, reduce the range of change at action in-process power output, improve the effective utilization ratio of power, satisfy higher load drive requirement, help reducing the volume of electromagnetic head, reduce manufacturing cost, reduce the space and occupy, reduce unnecessary energy waste, improve the efficiency.

It should be noted that, since the valve body adapted to the solenoid valve is usually one-way, when the valve body is a one-way valve, the valve is not allowed to be connected to a vertical pipe through which a medium flows from bottom to top. Meanwhile, the electromagnetic valve is not suitable for being directly installed on a horizontal pipeline on the basis of the reason that the electromagnetic valve and the existing horizontal electromagnetic valve cannot be vertically installed.

Drawings

FIG. 1 is a schematic view of the general construction of a solenoid valve of the present invention;

FIG. 2 is a schematic view of a construction relating to a valve body portion;

FIG. 3 is a schematic view of a configuration relating to a portion of the electromagnet head (state at startup);

fig. 4 is a partial configuration diagram relating to the electromagnetic head portion (upward movement state in which the movable core top surface exceeds the first stationary core lower end).

Detailed Description

Referring to fig. 1 to 4, the solenoid valve of the present invention includes a valve body 10 having an inlet pipe 11 bent upward and an outlet pipe 18 bent downward, the inlet pipe having an upward opening and the outlet pipe having a downward opening, and an electromagnetic head (or electromagnetic driving head) 60 mounted above the valve body.

The nozzle of the inlet pipe can be generally positioned right above the nozzle of the outlet pipe, and can also be arranged at other positions according to actual needs.

For example, the inlet pipe may be bent in a manner (shape) that the inlet side sidewall of the valve body main portion (the portion provided with the sealing pair, or the portion excluding the inlet pipe and the outlet pipe) extends horizontally outward and then bends upward to make the pipe orifice face upward and the central axis of the pipe orifice vertical, and the outlet pipe may be bent in a manner (shape) that the inlet pipe is led out downward from the bottom of the valve body main portion, then extends in the horizontal extending direction of the inlet pipe, and then bends downward to make the pipe orifice face downward and the central axis of the pipe orifice vertical, and the central axis of the inlet pipe orifice and the central axis of the outlet pipe orifice are located on the same vertical straight line to adapt to installation on a vertical straight pipe.

The horizontal extending parts of the inlet pipe and the outlet pipe can be connected into a whole, or the bottom of the inlet pipe which extends horizontally and is adjacent up and down is integrated with the top of the outlet pipe, so that the volume and the material consumption can be reduced, and the preparation is convenient.

A connecting rib 19 may be provided between the vertical portions of the inlet and outlet pipes to improve integrity and strength.

Generally, the pipe orifices of the inlet pipe and the outlet pipe are the same in adaptive connection pipe diameter, and can be directly connected into the same vertical pipeline or connected into the same vertical pipeline by adopting connecting pipe fittings with the same specification.

Typically, both the inlet and outlet pipe orifices are provided with flange structures for connection to external pipes.

The disk seat of valve body (when adopting pilot valve structure, including main valve seat and vice disk seat) sets up for the level usually, constitute the valve clack of same sealing pair with the disk seat (when adopting pilot valve structure, including main valve lamella and vice valve clack) and be located the top of its corresponding disk seat, realize opening and closing of corresponding sealing pair through reciprocating, the central axis direction of disk seat through-hole (the central through-hole on the disk seat, the medium passageway for the disk seat) is vertical, the sealed face of disk seat (the sealed face on the disk seat) is vertical plane of rotation for the rotation, correspondingly, the sealed face of valve clack (the sealed face on the valve clack) that constitutes valve seal with the sealed face of disk seat also is vertical plane of rotation for the rotation, and the rotation axis of the sealed face of disk seat and the sealed face of valve clack coincide, for same straight line.

According to the characteristic of electromagnetic head, install the electromagnetic head in valve body top and should be vertical usually, and its moving means who moves the iron core is vertical rectilinear movement, moves the lower extreme of iron core and stretches into in the valve body of valve body, connects and needs external drive's opening and closing piece (valve clack, when adopting the pilot valve structure, for vice valve clack), drives the opening and closing piece that connects and reciprocates.

Under the condition that the valve clack is positioned above the corresponding valve seat, the movable iron core moves upwards to open the valve and moves downwards to close the valve.

The valve body can adopt any solenoid valve body capable of being horizontally installed, for example, the valve body disclosed in CN105650329A, and the inlet side tubular structure and the outlet side tubular structure of the valve body can be set as the inlet pipe and the outlet pipe defined by the present invention on the basis that other parts of the valve body are not changed.

In order to adapt to pipelines with large caliber/large flow and high pressure (ultrahigh pressure), the valve body preferably adopts a pilot valve structure to reduce the requirement on driving force during starting. The valve body adopting the pilot valve structure is provided with a main sealing pair and an auxiliary sealing pair (or called pilot sealing pair), the auxiliary sealing pair is positioned above the main sealing pair, an auxiliary valve clack in the auxiliary sealing pair is positioned above an auxiliary valve seat, and the lower end of the movable iron core is connected with an auxiliary valve clack (the valve clack of the auxiliary sealing pair) and can drive the auxiliary valve clack to move up and down. The valve body disclosed in CN105650329A is a pilot valve structure, and can be well adapted to ultrahigh pressure/large diameter occasions.

Referring to fig. 2, the present invention provides a preferred valve body embodiment adopting a pilot valve structure, wherein an inlet pipe 11 is connected to the side wall of the main body part of the valve body, an outlet pipe 18 is connected to the bottom of the main body part of the valve body, the connection parts are smoothly transited, and the pipe orifice of the inlet pipe faces downwards and the pipe orifice of the outlet pipe faces upwards through the bending of the inlet pipe and the outlet pipe, so as to adapt to the connection mode of downward inlet and upward outlet.

A horizontal valve seat (or called main valve seat) 16 is arranged in the main body part of the valve body, the valve seat is positioned at the bottom of a middle cavity 22 in the valve body, a vertical central through hole of the valve seat forms a necessary path of a main medium channel, a valve clack (or called main valve clack) 15 capable of moving up and down is arranged above the valve seat, the valve clack is in a cup shape, the side surface of the valve clack is cylindrical, a valve clack sealing piece (or called main valve clack sealing piece) is arranged at the bottom of the valve seat, and a valve clack sealing surface (or called main valve clack sealing surface) corresponding to the valve seat sealing surface (or called main valve seat sealing surface) is arranged on the valve clack sealing piece; or, according to the structure of the valve sealing pair (or called main sealing pair), the valve flap sealing surface may be directly arranged on the corresponding part of the valve flap bottom without the valve flap sealing element (for example, the sealing surface material is welded on the corresponding part of the valve flap bottom and then machined to form the sealing surface, usually, the valve seat sealing surface may also be arranged in this way), the lower part or the bottom of the valve flap side wall is provided with the damping hole 29 communicating the inner cavity 24 and the inlet cavity 21 (via the middle cavity 22 part directly communicated with the inlet cavity), the main body part of the valve body is provided with the guide sleeve 14 in guide fit with the valve flap, the fitting way of the valve flap side surface and the inner wall of the guide sleeve is sliding seal fit (a plurality of annular sealing rings may be arranged between the two to better realize the sealing under the sliding fit), i.e. the valve flap is allowed to slide up and down and not allow the medium to pass (seal) between the two, the outer side surface of the upper part of the guide sleeve is sealed and fixedly connected with the inner wall of the main body part of the valve body, a space is reserved between the outer side face of the lower portion of the guide sleeve and the inner wall of the valve body main body portion, a space is also reserved between the lower end of the guide sleeve and the inner wall (bottom wall) of the valve body main body portion, and the spaces form a part of the middle cavity.

The top of the main body part of the valve body is provided with a valve cover 12 which covers the top opening of the main body part of the valve body, a flow guide channel is arranged in the valve cover, an auxiliary valve cavity is arranged on the flow guide channel, the bottom of the auxiliary valve cavity is provided with an auxiliary valve seat 17 which is horizontally arranged, the vertical central through hole of the electromagnetic head forms a necessary path of a flow guide channel, an auxiliary valve flap 44 capable of moving up and down is arranged above the auxiliary valve seat, auxiliary valve sealing surfaces matched with each other are arranged on the auxiliary valve seat and the auxiliary valve flap to seal the auxiliary valve, a magnetism isolating pipe seat 39 of the electromagnetic head is fixedly arranged on a valve cover to cover a top opening of the auxiliary valve cavity, so that the auxiliary valve cavity with an open top on the valve cover forms a closed cavity, the lower end of a movable iron core 63 of the electromagnetic head is connected with the top of the auxiliary valve flap to drive the auxiliary valve flap to move up and down, and the opening and closing of an auxiliary valve sealing pair (a valve sealing pair consisting of the auxiliary valve seat and the auxiliary valve flap) are realized.

The flow guide channel on the valve cover is divided into two parts, wherein the inlet of the inlet side flow guide channel 23 is arranged on the bottom surface of the valve cover and is communicated with the upper cavity 25, the outlet is communicated with the auxiliary valve cavity positioned above the auxiliary valve seat, the inlet of the outlet side flow guide channel is communicated with the central through hole of the auxiliary valve seat from the lower part, the outlet of the outlet side flow guide channel is communicated with the flow guide channel 26 arranged on the side wall of the main body part of the valve body, a connecting pipe fitting 13 can be arranged between the outlet of the outlet side flow guide channel on the valve cover and the inlet of the flow guide channel on the side wall of the main body part of the valve body, the upper end and the lower end of the connecting pipe fitting are respectively inserted into the outlet of the outlet side flow guide channel on the valve cover and the inlet of the flow guide channel on the side wall of the main body part of the valve body, and are respectively provided with a sealing ring for sealing, so as to ensure the reliability and the sealing of the connection between the outlet of the outlet side flow guide channel on the valve cover and the inlet of the flow guide channel on the side wall of the main body part of the valve body, the outlet of the flow guide channel on the side wall of the main body part of the valve body is arranged on the valve body wall of the lower cavity 27 and is communicated with the lower cavity.

The working process of the embodiment mainly comprises the following steps: when the electromagnetic valve is closed, the electromagnetic head is powered off, the movable iron core and the auxiliary valve seat move downwards together, the auxiliary valve sealing pair is closed, a medium at an inlet side can enter the inner cavity and the upper cavity through the damping holes, the medium at the upper cavity cannot flow out through the diversion channel, the pressure of the medium at the inlet side of the valve gradually rises under the action of the pressure of the medium at the inlet side of the valve, the valve clack moves downwards, the main sealing pair is closed, the valve enters a closed state, when the electromagnetic head is powered on, the movable iron core drives the auxiliary valve clack to move upwards, the auxiliary valve sealing pair is opened, the medium in the inner cavity and the upper cavity can flow into the lower cavity through the diversion channel and flows out through the lower cavity, simultaneously, due to the damping effect of the damping holes, the pressure of the medium at an outlet side of the valve is reduced, the valve clack moves upwards, the main sealing pair is opened, the valve enters an open state, and the medium can sequentially pass through the central through holes of the inlet cavity 21, the middle cavity 22 and the valve seat, The lower chamber 27 and the outlet chamber 28 flow through the valve.

Compared with the valve body disclosed in CN105650329A, the embodiment obviously simplifies the structures of the auxiliary valve sealing pair and the flow guide channel, simplifies the processing technology, reduces the processing cost, has no exposed flow guide connecting pipe, and is not easy to damage and leak.

The electromagnetic head can adopt any electromagnetic head suitable for driving a corresponding valve body, the lower end of a movable iron core of the electromagnetic head is connected with an auxiliary valve clack (an auxiliary valve opening and closing piece), after a coil is electrified, the movable iron core drives the auxiliary valve clack to move upwards to separate from an auxiliary valve seat, an auxiliary valve sealing pair is opened, an upper cavity is communicated with a lower cavity through an auxiliary valve inlet side medium channel and an auxiliary valve outlet side medium channel, the electromagnetic head is limited by damping and throttling effects of a damping hole, medium pressure of the inner cavity and the upper cavity is reduced, a main valve clack moves upwards under the action of pressure difference between two sides, the main valve sealing pair is opened, and the valve is in an opening state.

Referring to fig. 3-4, as a preferred embodiment, the electromagnetic head may be provided with an electromagnetic head housing 30, and a coil (or called excitation coil) 66, a movable iron core 63, a stationary iron core, and a magnetism isolating tube 38, which are disposed vertically and coaxially with the electromagnetic head housing (the central axis is on the same vertical straight line), the coil, the movable iron core, and the stationary iron core are mounted in the electromagnetic head housing, the coil surrounds the outside of the magnetism isolating tube and is fixedly mounted on the coil rack 36, the magnetism isolating tube passes through a magnetism isolating tube through hole on a bottom plate of the electromagnetic head housing, the top end of the magnetism isolating tube is fixedly connected to a top plate of the electromagnetic head housing, the bottom end of the magnetism isolating tube is located outside the electromagnetic head housing and is generally fixedly mounted on a magnetism isolating tube seat 39, and the specific mounting manner may be according to actual needs.

The quantity of quiet iron core is two, including first quiet iron core 61 and the quiet iron core 62 of second, the main part of first quiet iron core is the tubulose, and the cover is established in the outside on magnet tube upper portion, is located between coil and the magnet tube, its lower extreme is less than the lower extreme of the quiet iron core of second, the quiet iron core of second all is the cylindricality with moving the iron core usually, sets up in magnet tube, wherein, the quiet iron core of second is fixedInstall the upper portion in the magnetism isolating pipe, move the iron core and be located the below of the quiet iron core of second, with the inner wall sliding fit of magnetism isolating pipe, its top surface under the normal state (under the non-powered state, or when moving the iron core and be in the low level, be in when the lower limit of its vertical migration scope promptly) and leave first working air gap H between the lower extreme of first quiet iron core ₁ Consequently, a second working gap H is left between the top surface of the movable iron core and the lower end of the second static iron core under the normal state ₂ And the vertical dimension of the second working gap is larger than the vertical dimension of the first working gap.

The magnetism isolating pipe seat can be provided with a central through hole, and the lower end of the magnetism isolating pipe is inserted into and fixed (for example, welded) on the central through hole of the magnetism isolating pipe seat, so that the magnetism isolating pipe can be fixedly installed on the magnetism isolating pipe seat.

The bottom of the magnetism isolating pipe seat can be provided with a flange structure and is fastened on the valve cover of the valve body through screws (bolts).

The bottom surface of the magnetism isolating pipe seat can be provided with a vertical annular flange, a groove or a tongue-and-groove and the like which are used for being clamped and fixed with the corresponding structure of the upper surface of the valve cover.

The top of first quiet iron core can be equipped with (or be equipped with) the annular disc structure of circle, and the top disc structure of first quiet iron core stretches out from the top of the main part of first quiet iron core radially outwards, its upper surface with the laminating of the inboard surface (lower surface) of the roof of electromagnetic head casing to do benefit to magnetic conduction and restraint magnetism.

The magnetic head shell is internally and preferably provided with a magnetic conductive sleeve 33, the magnetic conductive sleeve is positioned at the connecting part of the bottom plate of the magnetic head shell and the magnetism isolating pipe, the main body part of the magnetic conductive sleeve is in a sleeve shape and is sleeved on the magnetism isolating pipe, the top height of the magnetic conductive sleeve is lower than the top height of the moving iron core in a normal state, the bottom of the magnetic conductive sleeve is provided with a circular disc-shaped structure, the bottom disc-shaped structure of the magnetic conductive sleeve radially extends outwards from the bottom end of the main body part of the magnetic conductive sleeve, and the lower surface of the magnetic conductive sleeve is attached to the inner side surface (upper surface) of the bottom plate of the magnetic head shell so as to be beneficial to magnetic conduction and magnetic bundling.

The electromagnetic head shell can be composed of a main shell body (or called shell body) with an open bottom and a magnetic conduction cover 31 covering the open bottom of the main shell body, so that the assembly of parts in the electromagnetic head shell is facilitated.

And the magnetism isolating pipe through hole on the electromagnetic head shell is positioned in the middle of the magnetism conducting cover.

The outer edge of the magnetic conduction cover can be provided with a short cylindrical connecting structure, and the magnetic conduction cover is tightly inserted into the bottom opening of the main shell body so as to be beneficial to connection and magnetic conduction.

A supporting sleeve 35 can be arranged between the magnetic conduction cover and the magnetism isolating tube seat, the supporting sleeve is sleeved on the magnetism isolating sleeve positioned between the magnetic conduction cover and the magnetism isolating tube seat, the top end of the supporting sleeve is connected with the bottom surface (lower surface) of the magnetic conduction cover, and the bottom end of the supporting sleeve is connected with the top surface of the magnetism isolating tube seat, so that the supporting between the electromagnetic head shell and the magnetism isolating tube seat is formed, and the magnetism isolating tube is effectively kept.

The coil is wound in an annular space between the upper baffle plate and the lower baffle plate of the coil rack, and the coil rack can be fixed on the magnetism isolating pipe and/or the electromagnetic head shell in any appropriate mode.

The top of the second stationary core can be provided with a vertical screw rod, the vertical screw rod passes through a screw rod hole arranged in the center of a top plate of the electromagnetic head shell, the outer side of the vertical screw rod is screwed with a fastening nut 32, the vertical screw rod is fastened with the electromagnetic head shell through the fastening nut, the fixing mode can effectively avoid deformation possibly caused by other fixing modes (for example, welding in a magnetism isolating pipe) or obstruction of movement of the movable core, and the operation is convenient.

The vertical dimension of the first working air gap (corresponding to the normal spacing) is preferably 2-3 mm to obtain a sufficient starting power, and the vertical dimension of the second working air gap can be set according to actual needs to ensure that the movable iron core has a required moving range.

When the above arrangement mode of the first working air gap is not suitable or needs to be further optimized, for example, for a high-power and large-volume electromagnetic head, the arrangement (selection) of the first stationary core cross section, the second stationary core cross section and the vertical dimensions of the first working air gap and the second working air gap in a normal state can be used to make the suction force between the movable core and the stationary core at the time of starting be 1.5-2.5 times of the suction force between the movable core and the stationary core when the top surface of the movable core and the lower end of the first stationary core are at the same height, or to say, according to the requirement that the suction force between the movable core and the stationary core at the time of starting is 1.5-2.5 times of the suction force between the movable core and the stationary core when the top surface of the movable core and the lower end of the first stationary core are at the same height, the relative proportions of the first stationary core cross section, the second core cross section and the vertical dimensions of the first working air gap and the second working air gap in a normal state are determined, on the basis, the vertical sizes of the first static iron core cross section, the second static iron core cross section and the first working air gap and the second working air gap in a normal state can be selected according to the stroke range (the range of up-down movement) of the movable iron core and other factors. Because the reverse force (for example, static friction force or valve medium self-sealing pressure and the like during starting) borne by the electromagnetic head is usually obviously greater than the reverse force borne during moving after starting and enough acceleration is required to be formed, the power demand during starting is obviously greater than the power demand during moving, according to experiments, the power during starting is set to be 1.5-2.5 times of the power during moving and is suitable for common purposes, and under the structure of the invention, the position where the static iron core suction force is minimum during moving of the movable iron core is the position where the top surface of the movable iron core and the lower end of the first static iron core are at the same height, so the relevant size of relevant parts is suitable according to the mode, when the power during starting is required, the vertical size of the first working air gap can be reduced and/or the cross-sectional area of the first static iron core can be increased, and the increase of the cross-sectional area of the second static iron core can increase the suction force between the movable iron core and the static iron core when the top surface of the movable iron core and the lower end of the first static iron core are at the same height, but the suction force on the movable iron core does not greatly contribute to the suction force when the movable iron core is started.

A spiral spring separation device tending to push the movable iron core and the second static iron core away from each other in a suction state is preferably arranged between the movable iron core and the second static iron core so as to realize quick and effective separation.

The coil spring release device may include a coil spring 46 and a release pin 48, the movable iron core is provided with a spring mounting hole located on an axis thereof, the release pin is in a cylindrical step shape with a thin upper part and a thick lower part, the top of the spring mounting hole is in a throat shape corresponding to the release pin, an inner diameter of the throat is slightly larger than an outer diameter of an upper part of the release pin (a fit clearance allowing the release pin to slide up and down is left between the spring mounting hole and the release pin) and is smaller than an outer diameter of a lower part of the release pin (the fit clearance allowing the release pin to slide up and down is left between the spring mounting hole and the release pin), the coil spring is located in the spring mounting hole, is in a pre-compression state, and has a top abutting against the bottom of the release pin and a bottom abutting against the bottom of the spring mounting hole.

Based on the convenience in processing and assembly, the spring mounting hole can be processed into a through hole, the separation pin and the spiral spring are installed from the bottom opening of the spring mounting hole, then the auxiliary valve clack 44 is installed at the lower end of the movable iron core, the top surface of the auxiliary valve clack is provided with a small cylindrical protrusion inserted into the spring mounting hole, and the small cylindrical protrusion blocks the bottom opening of the spring mounting hole to form the hole bottom of the spring mounting hole.

The height (vertical dimension) of the upper part (thinner cylindrical part) of the separation pin is larger than (slightly larger than) the length (vertical dimension) of the top necking of the spring mounting hole, therefore, under a normal state, the top end of the separation pin is exposed out of the spring mounting hole, when the movable iron core is sucked with the second static iron core, the top end of the separation pin is pressed into the hole of the mounting spiral spring by the bottom surface of the second static iron core, the separation pin applies upward pushing force to the static iron core under the action of the spiral spring, the lower end of the spiral spring applies downward pushing force to the movable iron core, the elasticity and the precompression degree of the spiral spring are properly selected, the force can be controlled, the force does not obstruct the attraction of the movable iron core and the static iron core when the movable iron core is electrified, and the movable iron core can be effectively pushed away from the static iron core when the static iron core is not electrified.

The terminal box 69 can be mounted on the side wall of the magnet head housing, and a terminal block for connecting an external power supply cable is provided in the terminal box, and the terminal block is connected to the coil through a wire penetrating through the side wall of the magnet head housing.

The lower end of the movable iron core is connected with an auxiliary valve flap 44 of the valve body, an auxiliary valve sealing element 41 is arranged at the lower end of the auxiliary valve flap and used for forming a valve sealing pair with a corresponding valve seat on the valve body, when the coil is not electrified, the movable iron core is at a low position, the auxiliary valve sealing element is pressed on the valve seat, a sealing surface on the auxiliary valve sealing element is connected with a sealing surface on the valve seat, a medium channel is cut off, the valve (corresponding sealing pair) is in a closed state, when the coil is electrified, the movable iron core drives the starting element to move upwards to a high position, a gap is formed between the auxiliary valve sealing element and the valve seat, and the valve (corresponding sealing pair) is in an open state.

The auxiliary valve sealing member may be fitted on a lower end surface (bottom surface) of the auxiliary valve flap.

Can be equipped with the annular ladder groove that is used for inlaying dress auxiliary valve sealing member on the lower terminal surface of vice valve clack, the inner segment diameter in annular ladder groove is less than outer section diameter, the auxiliary valve sealing member is big-end-up's ladder cylindricality, and its upper segment is located the inner segment in annular ladder groove, the hypomere is located the outer section in annular ladder groove, be equipped with the internal thread on the outer section in annular ladder groove, connect soon and compress tightly cover 42, the up end that compresses tightly the cover presses on the reducing terminal surface of annular ladder groove and auxiliary valve sealing member (two sections are in the terminal surface that the boundary department formed), realizes the fixed of auxiliary valve sealing member on annular ladder groove from this.

The material of the portions may be selected depending on the desired magnetic properties of the portions. The pressing sleeve, the auxiliary valve clack, the magnetism isolating pipe seat, the supporting sleeve, the magnetism isolating pipe, the separating pin and the spring are preferably made of diamagnetic materials, the magnetic conductive sleeve and the electromagnetic head shell (comprising the main shell and the magnetic conductive cover) are preferably made of paramagnetic materials, and the movable iron core, the first static iron core and the second static iron core are preferably made of soft magnetic materials.

The working process of the electromagnetic head mainly comprises the following steps:

when the coil does not work, the coil is not electrified, the state can be called as a normal state, the movable iron core is positioned at a low position (or at a lower limit position of a moving range), the gap between the movable iron core and the two static iron cores is the largest, wherein the gap between the movable iron core and the first static iron core (the gap between the top surface of the movable iron core and the lower end of the corresponding static iron core) is a first working air gap H ₁ And the gap between the first static iron core and the second static iron core is a second working air gap H ₂ 。

When starting, the coil is electrified, the inner hole of the coil generates a magnetic field, and the magnetic circuit is divided into two loops: the magnetic force line of a loop passes through the movable iron core and the first working gap H ₁ The first static iron core, the main shell, the magnetic conduction cover and the lower magnetic conduction sleeve pass through the magnetic isolation pipe wall and return to the movable iron core; the magnetic force line of the other loop passes through the movable iron core and the second working air gap H ₂ The second static iron core, the main shell, the magnetic conduction cover and the magnetic conduction sleeve pass through the magnetic conduction pipe wall and return to the movable iron core.

Under the action of magnetic force lines (magnetic field), a first working air gap H between the movable iron core and the first static iron core ₁ The suction force generated is F ₁ The first static iron core is used for attracting the movable iron core; second working air gap H between movable iron core and second static iron core ₂ The suction force generated is F ₂ The second static iron core is used for attracting the movable iron core; the movable iron core generates a screw force F under the action of a coil inner hole magnetic field in the magnetism isolating pipe ₄ The movable iron core is driven to approach the second static iron core, so that the movable iron core is subjected to F in the magnetism isolating pipe ₁ 、F ₂ And F ₄ The starting is started under the combined action of (a starting can be called as a starting), an upward moving trend or upward moving acceleration is formed, the movable iron core is driven to approach the second static iron core, and the driving force (resultant force) of the starting is as follows: f _{Beginning of the design} =F ₁ +F ₂ +F ₄ 。

Movable iron core is in F ₁ 、F ₂ And F ₄ When the movable iron core moves upwards to a certain degree under the combined action, the height of the top surface of the movable iron core is consistent with that of the lower end of the first static iron core, and a first working air gap H between the movable iron core and the first static iron core ₁ Closed, second working air gap H ₂ Into (or instead of) a third working air gap H ₃ It can be regarded as a movable iron core in F ₁ 、F ₂ And F ₄ The movement process under the combined action is ended. At the moment, a third working air gap between the movable iron core and the second static iron core is H ₃ The second static iron core is arranged at a third working air gap H ₃ The generated suction force is F ₃ The movable iron core is mainly attracted by the second static iron core, the attraction of the first static iron core to the movable iron core can be substantially ignored, and the movable iron core is arranged in the third working air gap H ₃ GeneratingSuction force F ₃ Sum screw force F ₄ Move toward the second stationary core (may be called secondary start) under the combined action of (a) and (b), and a driving force (resultant force) F of the secondary start _{Final (a Chinese character of 'gan')} =F ₃ +F ₄ 。

When the movable iron core moves upwards to be combined with the second static iron core, the movable iron core is in a high position and cannot move upwards continuously, and the movable iron core is at F ₃ And F ₄ The movement process under the combined action is finished, and the third working air gap H ₃ And (4) disappearing.

When the coil is powered off, the attraction force between the movable iron core and the two static iron cores and the force of the solenoid in the magnetism isolating pipe disappear (small residual magnetic attraction force possibly exists), and the movable iron core moves downwards under the action of self weight and spring force and returns to the initial state (normal state) that the movable iron core is at a low position.

In this specification, a chamber (a main space for accommodating a medium) in the inlet pipe is referred to as an inlet chamber, a portion of the chamber in the outlet pipe located below the valve seat is referred to as a lower chamber, and the remaining portion is referred to as an outlet chamber, a portion of the chamber in the valve body main body portion located above the valve seat in the valve closed state is referred to as an upper chamber, and a portion of the chamber in the valve body main body portion located above the valve seat and not belonging to the upper chamber is referred to as an intermediate chamber, or for convenience of description based on the context, a portion of the chamber in the valve body main body portion located above the valve seat (including the upper chamber) may be referred to as an intermediate chamber, and a chamber in the valve flap may be referred to as an inner chamber. However, whether the valve body is divided into parts (e.g., a main body part, an inlet pipe and an outlet pipe) or the cavity in the valve body, since the valve body and the cavity in the valve body are continuous and there is no clear solid interface between the parts, it is meaningless to pursue a clear boundary between the parts, and the parts are expressed in a manner convenient for the literal representation and understanding of the related art.

The technical means disclosed by the invention can be combined arbitrarily to form a plurality of different technical schemes except for special description and the further limitation that one technical means is another technical means.

Claims (10)

1. The vertical electromagnetic valve is characterized in that the valve body is provided with an upward bent inlet pipe and a downward bent outlet pipe, the pipe orifice of the inlet pipe faces upwards, and the pipe orifice of the outlet pipe faces downwards.

2. The vertical electromagnetic valve with the upper outlet and the lower outlet as claimed in claim 1, wherein a pipe orifice of the inlet pipe is located right above a pipe orifice of the outlet pipe, the inlet pipe is bent in a manner that the inlet pipe extends horizontally and outwardly after being connected to the side face of the valve body main body and then is bent upwardly so that the pipe orifice faces upward, the outlet pipe is bent in a manner that the outlet pipe extends along the horizontal extending direction of the inlet pipe after being connected to the bottom of the valve body main body and then is bent downwardly so that the pipe orifice faces downward, and a central axis of the pipe orifice of the inlet pipe and a central axis of the pipe orifice of the outlet pipe are vertical and are located on the same straight line.

3. The vertical electromagnetic valve with the upper outlet and the lower outlet as claimed in claim 1, wherein the valve body is of a pilot valve structure, and is provided with a main sealing pair and an auxiliary sealing pair, the auxiliary sealing pair is located above the main sealing pair, an auxiliary valve flap in the negative sealing pair is located above an auxiliary valve seat, and the lower end of the movable iron core extends into the valve body and is connected with the auxiliary valve flap.

4. The vertical solenoid valve as claimed in any one of claims 1 to 3, wherein the solenoid head is provided with a solenoid head housing, and a coil, a movable iron core, a stationary iron core and a magnetism isolating tube which are vertically and coaxially arranged with the solenoid head housing, the coil, the movable iron core and the stationary iron core are arranged in the solenoid head housing, the coil surrounds the outside of the magnetism isolating tube and is fixedly arranged on a coil rack, the magnetism isolating tube passes through a magnetism isolating tube through hole on a bottom plate of the solenoid head housing, the top end of the magnetism isolating tube is fixedly connected with a top plate of the solenoid head housing, the bottom end of the magnetism isolating tube is arranged outside the solenoid head housing, the stationary iron core comprises a first stationary iron core and a second stationary iron core, the main body part of the first stationary iron core is tubular and is arranged outside the upper part of the magnetism isolating tube and is arranged between the coil and the magnetism isolating tube, the lower end of the first stationary iron core is lower than the lower end of the second stationary iron core, and the movable iron core are arranged in the magnetism isolating tube, the second static iron core is fixedly arranged on the upper portion in the magnetism isolating pipe, the movable iron core is located below the second static iron core and is in sliding fit with the inner wall of the magnetism isolating pipe, and a first working air gap is reserved between the top surface of the movable iron core and the lower end of the first static iron core under the normal state.

5. The vertical electromagnetic valve according to claim 4, wherein the top of the first stationary core is provided with a circular disc-shaped structure, the circular disc-shaped structure of the top of the first stationary core extends radially outward from the top end of the main body of the first stationary core, and the upper surface of the circular disc-shaped structure of the top of the first stationary core is attached to the inner side surface of the top plate of the electromagnetic head housing.

6. The vertical electromagnetic valve according to claim 4, wherein a flux sleeve is disposed in the solenoid head housing, the flux sleeve is located at a connecting portion between a bottom plate of the solenoid head housing and the flux-isolating tube, a main body of the flux sleeve is in a shape of a sleeve and is sleeved on the flux-isolating tube, a top of the flux sleeve is lower than a top of the movable core in a normal state, a bottom of the flux sleeve is provided with a circular disc structure, the circular disc structure at the bottom of the flux sleeve extends radially outward from a bottom end of the main body of the flux-isolating sleeve, and a lower surface of the flux sleeve is attached to an inner side surface of the bottom plate of the solenoid head housing.

7. The upper-lower-exit vertical electromagnetic valve according to claim 4, wherein a junction box is mounted on the side wall of the electromagnetic head housing, a connection terminal for connecting an external power cable is arranged in the junction box, and the connection terminal is connected with the coil through a wire penetrating through the side wall of the electromagnetic head housing.

8. The upper-upper and lower-outlet vertical solenoid valve according to claim 4, wherein the vertical dimension of the first working air gap is 2-3 mm in a normal state; or through the arrangement of the cross section of the first static iron core, the cross section of the second static iron core and the vertical sizes of the first working air gap and the second working air gap in a normal state, when the magnetic suspension motor is started, the suction force between the movable iron core and the static iron core is 1.5-2.5 times of the suction force between the movable iron core and the static iron core when the top surface of the movable iron core and the lower end of the first static iron core are at the same height.

9. The upper-inlet and lower-outlet vertical solenoid valve according to claim 4, wherein a coil spring release device which tends to push the movable iron core and the second stationary iron core away from each other in a suction state is arranged between the movable iron core and the second stationary iron core.

10. The vertical solenoid valve as claimed in claim 9, wherein the coil spring release device comprises a coil spring and a release pin, the movable iron core is provided with a spring mounting hole on an axis thereof, the release pin is in a cylindrical stepped shape with a thin upper part and a thick lower part, the top of the spring mounting hole is in a reduced opening shape corresponding to the release pin, the inner diameter of the reduced opening is slightly larger than the outer diameter of the upper part of the release pin and smaller than the outer diameter of the lower part of the release pin, the coil spring is located in the spring mounting hole and is in a pre-compression state, the top of the coil spring is pressed against the bottom of the release pin, and the bottom of the coil spring is pressed against the bottom of the spring mounting hole.

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