CN215487659U

CN215487659U - Novel solenoid valve and valve diaphragm assembly for keeping flow balance

Info

Publication number: CN215487659U
Application number: CN202120649341.7U
Authority: CN
Inventors: 毛杉海; 鲁焕炯; 邵杰; 魏荣波; 郑年泽; 顾国云
Original assignee: Yuyao Sanlixin Solenoid Valve Co ltd
Current assignee: Yuyao Sanlixin Solenoid Valve Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-01-11
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a novel electromagnetic valve and a valve diaphragm assembly for keeping flow balance, comprising a valve body, an electromagnetic control device and a diaphragm assembly, wherein the valve body comprises an inlet channel, an outlet channel, a through hole, a pilot valve channel and a main valve port, wherein the pilot valve channel is respectively communicated with the outlet channel and the through hole; the diaphragm assembly comprises an elastic diaphragm, a first balance hole is formed in the elastic diaphragm, a balance pin is positioned at the first balance hole, and a second balance hole which does not deform along with the deformation of the elastic diaphragm is formed in the balance pin. It does not produce the flow difference when reaching fluid flow to its impact force obtains certain reduction when taking place the water hammer phenomenon, reduces the damage degree of diaphragm, makes the life of solenoid valve obtain promoting.

Description

Novel solenoid valve and valve diaphragm assembly for keeping flow balance

Technical Field

The utility model relates to the technical field of novel electromagnetic valves, in particular to a novel electromagnetic valve and a valve diaphragm assembly for keeping flow balance.

Background

With the continuous development of the internet and the internet of things, the electromagnetic valve is not limited to industrial automation, and intelligent equipment enters thousands of households. The solenoid valve is known as an actuator in an automatic control system, so that the solenoid valve is indispensable in an intelligent device. The balance hole on the diaphragm of the prior commonly used pilot-operated solenoid valve is often deformed along with the diaphragm due to the stretching deformation of the diaphragm in the use process, so that the caliber of the balance hole is often changed, the flow rate entering a cavity is often different when fluid flows, the solenoid valve is shaken (the diaphragm shakes to cause the resonance of the whole pipeline) and abnormal sound in the opening or closing process, and the impact force of the solenoid valve is larger when a water hammer phenomenon occurs, so that the damage to the diaphragm is larger, and the service life of the solenoid valve is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical defects and provides a novel solenoid valve and a valve diaphragm assembly for keeping flow balance, and the specific structure of the novel solenoid valve and the valve diaphragm assembly for keeping flow balance is as follows.

The utility model relates to a valve diaphragm assembly for keeping flow balance, which comprises an elastic diaphragm, wherein a first balance hole is formed in the elastic diaphragm, a balance pin is positioned at the first balance hole, and a second balance hole which does not deform along with the deformation of the elastic diaphragm is formed in the balance pin.

Preferably, the balance pin is inserted into the first balance hole, and the balance pin and the first balance hole are positioned and fixed through the clamping structure; the clamping structure comprises a first clamping groove arranged on the balance pin, and the inner wall part of the first balance hole is correspondingly embedded into the first clamping groove;

or the clamping structure comprises a clamping protrusion and a second clamping groove, the clamping protrusion and the second clamping groove are respectively arranged on the outer wall of the balance pin and the inner part of the first balance hole, and the clamping protrusion is correspondingly embedded into the second clamping groove.

Preferably, the elastic diaphragm is characterized by further comprising a diaphragm pressing plate, wherein the diaphragm pressing plate is positioned on the upper side face of the elastic diaphragm, and a concave cavity is formed in the upper side of the diaphragm pressing plate.

Preferably, the diaphragm pressing plate fixing device further comprises a bottom plate pin, the bottom plate pin penetrates through the elastic diaphragm and then is connected with the diaphragm pressing plate so as to fix the diaphragm pressing plate, and the lower end step of the bottom plate pin and the diaphragm pressing plate are respectively abutted to the lower side face and the upper side face of the elastic diaphragm.

As another aspect, the novel solenoid valve includes a valve body, an electromagnetic control device, and a diaphragm assembly as described above, the valve body includes an inlet channel, an outlet channel, a through hole, a pilot valve channel respectively communicating with the outlet channel and the through hole, and a main valve port disposed on the outlet channel, a chamber is formed above the main valve port, the diaphragm assembly is disposed in the chamber, the pilot valve channel includes a pilot valve port, the electromagnetic control device is mounted at the pilot valve port, and the electromagnetic control device controls the pilot valve port to open or close.

Preferably, the chamber and diaphragm assembly are in interference with each other by a valve spring.

Preferably, the valve body comprises a valve cover and a main valve shell, a cavity is formed between the valve cover and the main valve shell, the edge of an elastic membrane of the membrane assembly is fixed between the valve cover and the main valve shell, the pilot valve channel comprises an upper channel and a lower channel which are arranged correspondingly, the inlet channel, the outlet channel and the lower channel are all arranged on the main valve shell, the through hole and the upper channel are all arranged on the valve cover, the electromagnetic control device is arranged at the pilot valve opening on the valve cover, and the valve cover is further provided with a pilot valve cavity which enables the through hole and the pilot valve channel to be communicated with each other.

Preferably, the electromagnetic control device comprises a movable iron core, a static iron core, an iron core spring, a magnetism isolating tube and a coil assembly, wherein the static iron core, the magnetism isolating tube and the movable iron core are all positioned in the center of the coil assembly; the iron core spring is sleeved at the lower end of the movable iron core, and the two ends of the iron core spring are respectively abutted against the boss at the lower end of the movable iron core and the bottom surface of the magnetism isolating pipe.

Preferably, the manual control valve further comprises a manual knob, a manual control hole communicated with the pilot valve cavity is formed in the inner wall of the pilot valve cavity, the manual knob comprises a control rod and a rotary piece located at the outer end of the control rod, the control rod is inserted into the manual control hole, a lifting column located below the lower end face of the movable iron core is arranged at the inner end of the control rod, a notch passing through the axis of the control rod is formed in the lifting column, the bottom side face of the notch is located below the pilot valve port, a gap is formed between the bottom side face of the notch and the lower end face of the movable iron core, a sealing ring is arranged between the control rod and the manual control hole, an insertion hole is formed in the inner wall of the manual control hole, a positioning pin is fixed in the insertion hole, an annular groove is formed in the control rod, and the positioning pin is correspondingly inserted into the annular groove.

Preferably, the root of the rotary piece is provided with a rotary limiting piece, the rotary limiting piece is provided with an arc limiting spigot or an arc limiting hole, the valve cover is provided with a stop block, the stop block is inserted into the arc limiting spigot or the arc limiting hole, and the included angle between the inner walls of the two ends of the arc limiting spigot or the arc limiting hole is 90 degrees.

Preferably, the outer port of the inlet channel and the outer port of the outlet channel are both detachably connected with pipe connectors through end covers, inner threads are arranged on the inner walls of the outer ports of the two pipe connectors, and O-shaped rings are arranged between the inner end faces of the two pipe connectors and the outer end faces of the inlet channel and the outlet channel respectively.

The novel electromagnetic valve and the valve diaphragm assembly for keeping flow balance, which are designed by the utility model, utilize the second balance hole formed on the balance pin to replace the balance hole on the diaphragm, so as to realize that the second balance hole does not deform along with the deformation of the elastic diaphragm, ensure that the second balance hole always keeps the caliber, and ensure that no flow difference is generated when fluid flows, and the impact force of the electromagnetic valve is reduced to a certain extent when the electromagnetic valve is opened and closed and a water hammer phenomenon occurs, so as to reduce the damage degree of the diaphragm, avoid the conditions of shaking and abnormal sound occurring in the process of opening and closing the electromagnetic valve, and prolong the service life of the electromagnetic valve.

Drawings

FIG. 1 is a schematic view (one) of the structure of a diaphragm assembly;

FIG. 2 is a schematic structural view (two) of a diaphragm assembly;

FIG. 3 is a schematic view (III) of the diaphragm assembly;

FIG. 4 is a schematic diagram (one) of the overall structure of the solenoid valve;

FIG. 5 is an exploded view of the solenoid valve;

FIG. 6 is a schematic view (II) of the overall structure of the solenoid valve;

FIG. 7 is a side view of the solenoid valve I;

FIG. 8 is a side view of the solenoid valve (II);

FIG. 9 is a schematic structural view of the static iron core and the magnetism isolating tube combined together;

fig. 10 is a schematic view of a manual knob.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Example (b):

as shown in the drawings, the valve diaphragm assembly for maintaining flow balance described in this embodiment includes an elastic diaphragm 3b, a first balance hole 31b is formed in the elastic diaphragm 3b, a balance pin 3d is positioned at the first balance hole 31b, and a second balance hole 31d that does not deform along with the deformation of the elastic diaphragm is formed in the balance pin 3d, wherein the balance pin 31b is a hard balance pin, such as a metal balance pin (e.g., a brass balance pin) or a plastic balance pin, whose hardness is much greater than that of the diaphragm, so that the diaphragm stretches under the action of pressure and does not affect the size of the balance hole, and the balance pin is embedded in the elastic diaphragm to eliminate the influence of the deformation of the elastic diaphragm on the balance hole, thereby enhancing the stability of the solenoid valve when the solenoid valve is turned on and off, and the elastic diaphragm is made of an elastic diaphragm made of TPE material and is formed by an injection molding process at one step, make elastic diaphragm's intensity better for the reliability of solenoid valve is better, when the solenoid valve runs into the water hammer phenomenon in the water pipeling, reduces the damage of diaphragm based on this diaphragm intensity, makes the life of solenoid valve longer.

Preferably, the balance pin 3d adopts a clamping structure in the embedding of the elastic sheet diaphragm 3b, so that after the balance pin 3d is inserted into the first balance hole 31b, the balance pin 3d and the first balance hole 31b are positioned and fixed through the clamping structure; the clamping structure comprises a first clamping groove 3e arranged on the balance pin 3d, and the inner wall part of the first balance hole 31b is correspondingly embedded into the first clamping groove 3 e; or the screens structure includes the protruding 3g of screens and second screens groove 33f, and the protruding 3g of screens and second screens groove 3f set up respectively on the outer wall of balanced pin 31d and the inside of first balanced hole 31b, and the protruding 3g of screens corresponds in the embedding second screens groove 3f, and its two kinds of screens structures make balanced pin 3 d's installation comparatively convenient, and the location is reliable.

In this embodiment, the membrane pressing plate further comprises a membrane pressing plate 3a and a bottom plate pin 3c, the membrane pressing plate 3a is positioned on the upper side of the elastic membrane 3b, a concave cavity 31a is formed in the upper side of the membrane pressing plate 3a, the bottom plate pin 3c penetrates through the elastic membrane 3b and then is connected with the membrane pressing plate 3a to fix the membrane pressing plate, the lower end step of the bottom plate pin and the membrane pressing plate respectively abut against the lower side and the upper side of the elastic membrane, specifically, the bottom plate pin simultaneously penetrates through the elastic membrane and the through hole of the membrane pressing plate, after the upper end groove 31c of the bottom plate pin 3c is expanded through the hole expanding device, the periphery of the groove is turned outwards to clamp the upper end of the bottom plate pin at the upper end opening of the through hole of the membrane pressing plate, so that the membrane pressing plate is fixed on the elastic membrane by the bottom plate pin, wherein the fluid in the concave cavity can be gathered in the concave cavity after entering the chamber, so as to press down the elastic diaphragm.

As another embodiment, it is described a novel solenoid valve, comprising a valve body 100, an electromagnetic control device and a diaphragm assembly 3 as described above, the valve body 100 comprising an inlet channel 1a, an outlet channel 1b, a through hole 2d, a pilot valve channel 2i respectively communicating with the outlet channel 1b and the through hole 2d, and a main valve port 1c disposed on the outlet channel 1b, a chamber being formed above the main valve port 1c, the diaphragm assembly 3 being disposed in the chamber, the pilot valve channel 2i comprising a pilot valve port 2c, the electromagnetic control device being mounted at the pilot valve port 2c, and the electromagnetic control device controlling the pilot valve port 2c to open or close; specifically, the valve body 100 includes a valve cover 2 and a main valve housing 1, a cavity is formed between the valve cover 2 and the main valve housing 1, an edge of an elastic diaphragm 3b of the diaphragm assembly 3 is fixed in a recess 200 between the valve cover 2 and the main valve housing 1, and after an edge body of the valve cover 2 is sleeved on a ring body of the main valve housing 1, the edge body is fixed on the main valve housing 1 through bolts, so that the valve cover 2 presses the edge of the elastic diaphragm 3b to achieve interference fit fixation of the recess 200 and the edge of the elastic diaphragm 3b, and to increase the deformation resistance strength of the main valve housing 1 and the valve cover 2, the pilot valve channel 2i includes an upper channel 21i and a lower channel 22i which are correspondingly arranged, an inlet channel 1a, an outlet channel 1b and the lower channel 22i are arranged on the main valve housing 1, a through hole 2d and the upper channel 21i are arranged on the valve cover 2, the electromagnetic control device is mounted at a guide valve port 2c on the valve cover 2, a cavity 2b which enables the through hole 2d and the pilot valve channel 2i to be communicated with each other, the recess 200 is formed by the valve cover 2 having an inner recess, in order to make the use performance better, the diameter of the through hole is designed to be larger than the valve guide port, and the main valve housing and the valve cover are made of plastic material, so that a plastic electromagnetic valve is formed based on the above, and various calibers can be formed, wherein the calibers range is DN10-50 mm.

Preferably, a valve core spring 11 is abutted between the chamber and the diaphragm assembly 3, and the valve core spring is mainly used for assisting the elastic diaphragm to move downwards under pressure.

Preferably, the electromagnetic control device comprises a movable iron core 5, a static iron core 4b, an iron core spring 16, a magnetism isolating tube 4 and a coil assembly 6, wherein the static iron core 4b, the magnetism isolating tube 4 and the movable iron core 5 are all positioned in the center of the coil assembly 6, the movable iron core 5 is positioned in an inner hole of the magnetism isolating tube 4, a lower end connecting tube body 4a of the magnetism isolating tube 4 is in threaded connection with the pilot valve cavity 2b, the lower end of the movable iron core 5 penetrates through the lower end connecting tube body 4a of the magnetism isolating tube 4, and a sealing element 5a corresponding to the position of the pilot valve opening 2c is arranged at the lower end of the movable iron core 5; the iron core spring 16 is sleeved at the lower end of the movable iron core 5, and two ends of the iron core spring are respectively abutted against the boss at the lower end of the movable iron core 5 and the bottom surface of the magnetism isolating pipe 4, so that the power of the coil can be greatly reduced based on the plastic electromagnetic valve formed in the above way, and the energy-saving use is facilitated.

When the coil 6 is not electrified, under the action of the iron core spring 16, the sealing piece 5a on the movable iron core 5 closes the pilot valve port 2c, water entering from the inlet channel 1a of the valve body enters the upper cavity of the diaphragm through the balance hole 31d, at the moment, under the action of pressure difference, the diaphragm assembly 3 stretches and deforms downwards, so that the diaphragm seals and closes the main valve port 1c, at the moment, the water in the inlet channel cannot enter the outlet channel through the main valve port, and the electromagnetic valve is in a closed state. When the coil is electrified, the movable iron core 5 is moved upwards by the electromagnetic force generated by the coil 6, the sealing piece 5a leaves the pilot valve port 2c, the pressure of the upper cavity of the diaphragm is released to the outlet channel through the through hole 2d and the pilot valve port 2c, at the moment, the diaphragm component 3 stretches upwards and deforms under the action of pressure difference, so that the diaphragm 3b leaves the main valve port 1c, at the moment, the water of the inlet channel enters the outlet channel through the main valve port, and at the moment, the electromagnetic valve is in an open state.

In this embodiment, the manual knob 14 is further included, the material of the manual knob is glass fiber reinforced nylon, the manual knob is formed by an injection molding process, a manual control hole 2g communicated with the pilot valve cavity 2b is formed in the inner wall of the pilot valve cavity 2b, the manual knob 14 includes a control rod 141 and a rotary piece 14a located at the outer end of the control rod 141, the control rod 141 is inserted into the manual control hole 2g, a lifting column 14e located below the lower end face of the movable iron core 5 is arranged at the inner end of the control rod 141, a notch 14d passing through the axis of the control rod 141 is arranged on the lifting column 14e, the bottom side face 14g of the notch 14d is located below the valve guide port 2c, so that a gap is formed between the bottom side face of the notch 14d and the lower end face of the movable iron core 5, a sealing ring is arranged between the control rod 141 and the manual control hole 2g, the sealing ring is embedded in an annular groove 14c of the control rod 141, an insertion hole 2h is arranged on the inner wall of the manual control hole 2g, the positioning pin 15 is fixed in the insertion hole 2h, the control rod 141 is provided with a ring groove 14b, the positioning pin 15 is correspondingly inserted into the ring groove 14b, and the lifting column 14e is of a semicircular structure.

The manual control mechanism mainly aims at that when the electromagnetic control mode has problems, the electromagnetic valve can be opened and closed manually, the emergency treatment mode is that once the electromagnetic control device fails to work when power is off or faults occur, the rotary vane needs to be rotated to rotate the control rod, the round surface of the lifting column is contacted with the lower end surface of the movable iron core to lift the movable iron core and open the valve opening, then the control rod is rotated to lead the lifting column to be far away from the lower end surface of the movable iron core, the movable iron core automatically falls down under the action of the iron core spring to plug and close the valve guide port, the locating pin and the annular groove are matched, so that the manual knob is located and fixed on the valve cover and can only rotate but not axially displace, the knob is prevented from popping outwards to play a locating role, and the locating pin 15 and the valve cover are compactly inserted, so that the locating pin cannot fall off.

Preferably, the root of the rotary piece 14a is provided with a rotary limiting piece 14h, the rotary limiting piece 14h is provided with an arc limiting spigot or an arc limiting hole 14f, the valve cover 2 is provided with a stop block 2j, the stop block 2j is inserted into the arc limiting spigot or the arc limiting hole 14f, an included angle between inner walls of two ends of the arc limiting spigot or the arc limiting hole 14f is 90 degrees, the manual knob can only rotate 90 degrees in a reciprocating mode by means of the arrangement of the arc limiting spigot or the arc limiting hole and the stop block, so that the manual knob can be further positioned out during manual control, when the rotary piece 14a is in the vertical direction, the electromagnetic valve is manually closed, and at the moment, the opening and closing of the electromagnetic valve can be controlled only through the coil 6. When the rotary piece 14a is horizontal, the movable iron core 5 is in a lifting state, the electromagnetic valve is in an opening state at the moment, and the electromagnetic valve is always in the opening state no matter whether the coil 6 is electrified or not at the moment, so that the pilot valve opening can be conveniently positioned and identified to be opened and closed, and the manual operation is more convenient and easier to understand.

In this embodiment, the outer port of the inlet channel 1a and the outer port of the outlet channel 1b are both detachably connected with a pipe connecting piece 9 through end covers, inner threads 9a are arranged on the inner walls of the outer ports of the two pipe connecting pieces 9, O-rings 10 are respectively arranged between the inner end surfaces of the two pipe connecting pieces 9 and the outer end surfaces of the inlet channel 1a and the outlet channel 1b, specifically, the outer port of the inlet channel 1a and the outer end surface of the outlet channel 1b are both connected with end covers 8 in a threaded manner, the outer end surface of the inlet channel 1a and the outer end surface of the outlet channel 1b are respectively attached with the pipe connecting pieces 9, the first step 9b of the pipe connecting piece 9 is in mutual contact with and limited by the second step 8a on the inner wall of the end cover 8, the outer end surface of the inlet channel 1a and the outer end surface of the outlet channel 1b are both provided with annular grooves 1f, the O-rings 10 are embedded in the annular grooves 1f, make and obtain sealed between inlet channel 1 a's outer port and the pipe connection spare 9, obtain sealed between outlet channel 1 b's outer port and the pipe connection spare 9, the end cover 8 material is the nylon of fine enhancement mode of glass, and through the injection moulding technology shaping, the material of pipe connection spare can be various, can be stainless steel, also can be plastic.

The pipe body connecting mechanism formed based on the above structure separates the part connected with the pipeline from the valve body, thereby facilitating the installation of the electromagnetic valve, facilitating the maintenance and replacement of the electromagnetic valve, and avoiding the possibility that the valve body is damaged in the installation and disassembly processes.

The pipe connector 9 is provided with a thread 9a in the middle for direct connection with the pipe, and an irregular connection thread is configured according to different connection sizes. Therefore, the connection mode of the whole electromagnetic valve can be changed only by changing the connection size of the pipe connecting piece 9 without changing the connection thread of the valve body 1, so that the flexibility of the electromagnetic valve is better, and the cost is greatly reduced.

The O-shaped ring 10 enables the end cover 8 and the valve body 1 to form sealing connection through locking of the end cover 8, and therefore sealing performance of the connecting mechanism and the valve body is guaranteed.

The pipe body connecting mechanism is convenient and reliable to install and does not need to directly connect the valve body and the pipeline. The valve body is connected with the pipeline through the connecting mechanism and then connected with the valve body, so that the valve body is protected to the maximum extent, and the technical problem that the valve body is damaged in the installation process due to the fact that the valve body in the conventional electromagnetic valve is directly connected with the pipeline in a separated installation mode, and the replacement cost is relatively high after the valve body is damaged is solved. Meanwhile, threads of the valve body are generally unique, different valve bodies are needed in different connection modes, and the solenoid valve is better in interchangeability due to the fact that the main valve body is not needed to be replaced as long as the pipe connecting piece is replaced in the separated connection mode.

In the plastic solenoid valve described in this embodiment, the main valve housing 1, the valve cover 2, the end cover 8, and the manual knob 14 are all made of glass fiber reinforced nylon, so that the pressure strength of the solenoid valve is ensured. The plastic electromagnetic valve has the characteristics of low cost, convenient installation, simple maintenance, convenient use, safety and reliability. The main body of the plastic electromagnetic valve is made of plastic materials, and the plastic electromagnetic valve is low in manufacturing cost, light in weight, low in coil power and convenient to use. Can satisfy the automatic control of various water pipelines. The device is particularly suitable for the application of pipelines in ordinary families, and does not need professional technicians for installation and maintenance. The utility model comprises electromagnetic valves with various calibers, can meet the requirements of different pipelines, adopts a pilot type structure, and has wide application pressure range and large flow.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims

1. A valve diaphragm assembly for keeping flow balance comprises an elastic diaphragm, and is characterized in that a first balance hole is formed in the elastic diaphragm, a balance pin is positioned at the first balance hole, and a second balance hole which does not deform along with the deformation of the elastic diaphragm is formed in the balance pin; the balance pin is inserted into the first balance hole, and the balance pin and the first balance hole are fixedly positioned through the clamping structure.

2. The diaphragm assembly for a valve for maintaining flow balance as claimed in claim 1, wherein the catching structure comprises a first catching groove provided on the balance pin, and an inner wall portion of the first balance hole is correspondingly fitted into the first catching groove;

3. The valve diaphragm assembly for maintaining flow balance of claim 1, further comprising a diaphragm pressure plate positioned on an upper side of the elastic diaphragm, wherein the upper side of the diaphragm pressure plate is provided with a cavity.

4. The diaphragm assembly for valve for maintaining flow balance as claimed in claim 3, further comprising a bottom plate pin penetrating the elastic diaphragm and connected to the diaphragm pressing plate to fix the diaphragm pressing plate, wherein the lower step of the bottom plate pin and the diaphragm pressing plate are respectively abutted against the lower side and the upper side of the elastic diaphragm.

5. A novel electromagnetic valve is characterized by comprising a valve body, an electromagnetic control device and a diaphragm assembly as claimed in any one of claims 1 to 4, wherein the valve body comprises an inlet channel, an outlet channel, a through hole, a pilot valve channel and a main valve port, the pilot valve channel is respectively communicated with the outlet channel and the through hole, the main valve port is arranged on the outlet channel, a cavity is formed above the main valve port, the diaphragm assembly is arranged in the cavity, the pilot valve channel comprises a pilot valve port, the electromagnetic control device is arranged at the pilot valve port, and the electromagnetic control device controls the pilot valve port to be opened or closed.

6. The new solenoid valve of claim 5 wherein the chamber and diaphragm assembly are in interference with the spool spring.

7. A novel solenoid valve according to claim 5 characterised in that the valve body comprises a valve cover and a main valve housing defining a chamber therebetween, the flexible diaphragm of the diaphragm assembly having an edge secured between the valve cover and the main valve housing, the pilot valve passage comprising an upper passage and a lower passage disposed in correspondence with each other, the inlet passage, the outlet passage and the lower passage all being disposed in the main valve housing, the through-hole and the upper passage all being disposed in the valve cover, the solenoid control means being mounted in the pilot valve port in the valve cover, the valve cover further being provided with a pilot valve cavity communicating the through-hole and the pilot valve passage with each other.

8. The novel electromagnetic valve according to claim 7, wherein the electromagnetic control device comprises a movable iron core, a static iron core, an iron core spring, a magnetism isolating tube and a coil assembly, wherein the static iron core, the magnetism isolating tube and the movable iron core are all positioned in the center of the coil assembly, the movable iron core is positioned in an inner hole of the magnetism isolating tube, a lower end connecting tube body of the magnetism isolating tube is connected to a cavity of the pilot valve, the lower end of the movable iron core penetrates through the lower end connecting tube body of the magnetism isolating tube, and a sealing element corresponding to the position of the opening of the pilot valve is arranged at the lower end of the movable iron core; the iron core spring is sleeved at the lower end of the movable iron core, and the two ends of the iron core spring are respectively abutted against the boss at the lower end of the movable iron core and the bottom surface of the magnetism isolating pipe.

9. The novel electromagnetic valve according to claim 7 or 8, further comprising a manual knob, wherein the inner wall of the pilot valve cavity is provided with a manual control hole communicated with the pilot valve cavity, the manual knob comprises a control rod and a rotary piece located at the outer end of the control rod, the control rod is inserted into the manual control hole, the inner end of the control rod is provided with a lifting column located below the lower end face of the movable iron core, the lifting column is provided with a notch passing through the axis of the control rod, the bottom side surface of the notch is located below the pilot valve port, so that a gap is formed between the bottom side surface of the notch and the lower end face of the movable iron core, a sealing ring is arranged between the control rod and the manual control hole, the inner wall of the manual control hole is provided with a jack, a positioning pin is fixed in the jack, the control rod is provided with a ring groove, and the positioning pin is correspondingly inserted into the ring groove.

10. The novel electromagnetic valve according to claim 9, wherein the root of the rotor is provided with a rotation limiting plate, the rotation limiting plate is provided with an arc-shaped limiting seam allowance or an arc-shaped limiting hole, the valve cover is provided with a stop block, the stop block is inserted into the arc-shaped limiting seam allowance or the arc-shaped limiting hole, and the included angle between the inner walls of the two ends of the arc-shaped limiting seam allowance or the arc-shaped limiting hole is 90 °.

11. A novel electromagnetic valve according to claim 7, characterized in that the outer port of the inlet channel and the outer port of the outlet channel are detachably connected with pipe connectors through end covers, inner threads are arranged on the inner walls of the outer ports of the two pipe connectors, and O-rings are arranged between the inner end surfaces of the two pipe connectors and the outer end surfaces of the inlet channel and the outlet channel respectively.