CN111623161A

CN111623161A - Electromagnetic valve

Info

Publication number: CN111623161A
Application number: CN201910152772.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-09-04

Abstract

The invention discloses a gas appliance electromagnetic valve which comprises a valve rod assembly, a valve seat and an electromagnet assembly, wherein the valve rod assembly comprises a valve rod and a movable core, the valve rod is movably connected with the movable core, the electromagnet assembly comprises a static core and a coil assembly, the static core comprises a first flange part and a second flange part, the first flange part comprises an end face, the movable core is driven by the valve rod to be close to or far away from the static core, the second flange part is fixedly connected with the valve seat, a concave part is formed between the first flange part and the second flange part, and the coil assembly is positioned in the concave part. The electromagnetic valve provided by the scheme has the advantages that the structure of the static core is optimized, the static core comprises the first flange part, the second flange part and the concave part arranged between the first flange part and the second flange part, the coil part can be wound and installed in the concave part during installation, compared with the electromagnetic valve in the background technology, the installation process of the coil is simplified, and the manufacturing process cost of the product can be relatively reduced.

Description

Electromagnetic valve

Technical Field

The invention relates to the technical field of valves, in particular to an electromagnetic valve applied to a gas system.

Background

As shown in fig. 1 and 2, fig. 1 is a schematic view of a typical solenoid valve for a gas system; fig. 2 is a schematic structural view of the stationary core in fig. 1.

The solenoid valve is including the disk seat 2 that the cover is equipped with the valve bonnet 1, and the valve bonnet 1 is inside to be equipped with the quiet core 3 of connecting in disk seat 2, and quiet core 3 is the U-shaped, and as shown in fig. 2, the both sides wall cover of the quiet core 3 of U-shaped is equipped with coil 4, and coil 4 includes main coil and secondary coil, and the solenoid valve still includes the core 6 that moves of taking connecting rod 5. Coil 4 is connected with electrode 9, and electrode 9 connects the thermocouple, and connecting rod 5 one end is stretched out valve bonnet 1 and is connected with sealing washer 7, sets up compression spring 8 between sealing washer 7 and the valve bonnet 1, moves core 6 and can be close or keep away from quiet core 3 by connecting rod 5 drives.

In the electromagnetic valve structure, when the coil 4 is installed, the auxiliary coil needs to be installed on the framework formed by processing the static core 3, the main coil is installed later, the static core 3 and the coil 4 are installed together with the valve seat 2 and the electrode 9, the installation mode of the coil is complex, and the cost is high.

Therefore, how to provide a solenoid valve with low cost and simple coil installation mode is an urgent technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention provides a gas appliance electromagnetic valve which comprises a valve rod assembly, a valve seat and an electromagnet assembly, wherein the valve rod assembly comprises a valve rod and a movable core, the valve rod is movably connected with the movable core, the electromagnet assembly comprises a static core and a coil assembly, the static core comprises a first flange part and a second flange part, the first flange part comprises an end face, the movable core is driven by the valve rod to be close to or far from the static core, the second flange part is fixedly connected with the valve seat, a concave part is formed between the first flange part and the second flange part, and the coil assembly is positioned in the concave part.

The electromagnetic valve provided by the scheme has the advantages that the structure of the static core is optimized, the static core comprises the first flange part, the second flange part and the concave part arranged between the first flange part and the second flange part, the coil part can be wound and installed in the concave part during installation, compared with the electromagnetic valve in the background technology, the installation process of the coil is simplified, and the manufacturing process cost of the product can be relatively reduced.

Drawings

FIG. 1 is a schematic diagram of a typical solenoid valve for a gas system;

FIG. 2 is a schematic view of the stationary core of FIG. 1;

FIG. 3 is a schematic structural view of a first embodiment of a solenoid valve for a gas appliance according to the present invention;

FIG. 4 is a schematic view of the valve housing of FIG. 3;

FIG. 5 is an axial cross-sectional view of the valve housing of FIG. 4;

FIG. 6 is a schematic view of the valve seat of FIG. 3;

FIG. 7 is a perspective view of the stationary core of FIG. 3;

FIG. 8 is an axial cross-sectional view of FIG. 7;

FIG. 9 is a bottom view of FIG. 8;

FIG. 10 is a schematic structural view of a second embodiment of a solenoid valve for a gas appliance according to the present invention;

FIG. 11 is a schematic view of the magnetic conductive ring of FIG. 10;

FIG. 12 is an enlarged view of the magnetic conductive ring and coil assembly of FIG. 10 in combination with a stationary core;

FIG. 13 is a schematic structural view of a gas appliance solenoid valve according to a third embodiment of the present invention;

FIG. 14 is an enlarged view of the coil component sleeved around the stationary core of FIG. 13;

FIG. 15 is a schematic structural view of a fourth embodiment of a solenoid valve for a gas appliance according to the present invention;

FIG. 16 is an enlarged view of the magnetic ring and coil assembly of FIG. 15, showing the stationary core engaged therewith.

The reference numerals in fig. 1-2 are illustrated as follows:

1, valve cover, 2, valve seat, 3, static core, 4 coil, 5 connecting rod, 6, dynamic core, 7 sealing ring, 8 compression spring and 9 electrode;

the reference numerals in fig. 3-16 are illustrated as follows:

1 valve seat, 101 groove bottom surface, 102 annular protrusion, 103 annular groove, 104 valve seat cavity, 105 valve seat outer wall, 2 stationary core, 201 stationary core main body, 202 second flange part, 203 first flange part, 204a circular groove, 204b through groove, 205 notch, 206 concave part, 3 coil part, 31 main coil, 32 secondary coil, 33 insulating layer, 4 envelope, 51 first pin part, 52 second pin part, 5 pin part, 6 first sealing ring, 7 second sealing ring, 8 flange, 9 valve cover, 901 valve cover through hole, 902 valve cover inner end surface, 903 valve cover bulge, 904 guide part, 10 reset spring, 11 moving core, 12 valve rod, 13 valve flap support part, 14 sealing valve flap, 15 magnetic conductive part, 151 first magnetic conductive end part, 152 second end part, 1501 convex table part.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to fig. 3-5, fig. 3 is a schematic structural diagram of a first embodiment of a gas appliance solenoid valve provided in the present invention; FIG. 4 is a schematic view of the valve housing of FIG. 3; FIG. 5 is an axial cross-sectional view of the valve housing of FIG. 4; fig. 6 is a schematic structural view of the valve seat of fig. 3.

The gas appliance electromagnetic valve in the embodiment comprises a valve rod assembly, a valve seat 1 and an electromagnet assembly, wherein the valve rod assembly comprises a valve rod 12 and a movable core 11, and the movable core 11 is movably connected with the valve rod 12. The electromagnetic valve is also provided with a valve cover 9 and a static core 2 matched with the dynamic core 11, wherein the dynamic core 11 can be an electromagnetic sheet, and the static core 2 can be an electromagnet. The valve cover 9 covers the valve seat 1 to form a valve cavity, the static core 2 and the moving core 11 are both arranged in the valve cavity, the static core 2 is specifically and fixedly arranged in the valve seat 1, as shown in fig. 3, the top of the valve seat 1 is provided with a recess 106, and the recess 106 is provided with an annular wall 107. The bottom end surface of the stationary core 2 abuts against the groove bottom surface 101 of the recess 106 of the valve seat 1.

It should be noted that the stationary core 2 of the electromagnetic valve of the gas appliance in the present embodiment is a cylindrical structure, as shown in fig. 7-9, fig. 7 is a schematic perspective view of the stationary core 2 in fig. 3; FIG. 8 is an axial cross-sectional view of FIG. 7; fig. 9 is a bottom view of fig. 8.

The coil component 3 in this embodiment is fitted around the outer periphery of the stationary core 2, the stationary core 2 may be a cylindrical structure, and electromagnetic force is generated between the stationary core 2 and the moving core 11 after the coil is energized.

In addition, the movable core 11 is connected to the valve rod 12 and can move synchronously with the valve rod 12 along the axial direction, the valve rod 12 is inserted into the top of the valve housing 9, in fig. 5, a guide portion 904 which extends upwards and guides the valve rod 12 to move is arranged on the top of the valve housing 9, a valve housing through hole 901 which penetrates through the inside and the outside is arranged on the top of the valve housing 9, the valve housing through hole 901 penetrates through the guide portion 904, the valve rod 1 penetrates through the valve housing through hole 901 to be connected with the movable core 11 which is located inside the valve housing 9, and the upper end face 1101 of the movable core 11 is located below the inner end face 902 of the valve housing. The valve cover 9 is covered on the valve seat 1, and as shown in fig. 5, the lower end of the valve cover 9 is provided with a valve cover protrusion 903 which is clamped with the annular protrusion 102 of the valve seat 1.

A sealing portion is connected to the upper end of the valve stem 12. As shown in fig. 3, the sealing portion is specifically a sealing valve flap 14, a valve flap supporting member 13 is further disposed at the upper end of the valve rod 12, and the sealing valve flap 14 is sleeved at the upper end of the valve rod 12 and supported by the valve flap supporting member 13. A pre-compressed return spring 10 is arranged between the flap support 13 and the top of the valve housing 9. In addition, an envelope 4 is arranged in a valve seat cavity of the valve seat 1, the upper part of the pin part 5 is enveloped in the cavity of the valve seat 1, an annular groove is formed at the upper end of the envelope 4, and a first sealing ring 6 is arranged to prevent gas from leaking to the outside. The upper end of the pin unit is connected to the coil component 3, and the lower end of the pin unit 5 is connected to a thermocouple (not shown).

The electromagnetic valve of the gas appliance can also be provided with a flange 8, and the flange 8 is sleeved on the outer wall 105 of the valve seat and is used for connecting a plug valve. The outer wall of valve seat 1 sets up annular groove 103, can set up second sealing washer 7 in the annular groove 103, and second sealing washer 7 is used for the sealed of plug valve, prevents that the gas from leaking.

The working principle of the electromagnetic valve of the gas appliance in the scheme is as follows:

fixedly assembling a solenoid valve and a plug valve of a gas appliance, installing the solenoid valve and the plug valve on a gas stove, and connecting a pin part with a thermocouple;

when a knob on a gas stove is pressed and rotated, a push rod of the plug valve pushes a valve rod 12 to move downwards, a sealing valve clack 14 and a movable core 11 move downwards under the driving of the valve rod 12, a valve port (the valve port is the valve port of the plug valve assembled with a gas appliance electromagnetic valve) is opened, gas flows into the plug valve and flows into a gas stove system, and the movable core 11 is pushed to a position attached to a stationary core 2;

meanwhile, an igniter of the stove is ignited to ignite gas, a thermocouple generates thermoelectric force under the heating action of flame, the thermoelectric force acts on a coil, a coil component 3 generates current and generates a magnetic field, electromagnetic force is generated between a movable core 11 and a static core 2, when the electromagnetic force is larger than reset force generated by a reset spring 10, the movable core 11 and the static core 2 are attracted, even if a knob of the gas stove is loosened, a valve rod 12 cannot move upwards, an electromagnetic valve can be kept to be opened, and the gas cannot be closed.

When the gas stove is accidentally extinguished, the thermocouple is not heated any more, the temperature of the thermocouple begins to decrease, the current on the coil component 3 also begins to decrease, the electromagnetic field begins to weaken, when the electromagnetic force between the movable core 11 and the stationary core 2 is not enough to overcome the spring force generated by the return spring 10, the movable core 11 is separated from the stationary core 2, the valve rod 12 drives the sealing valve clack 14 to move upwards under the action of the spring force, so that the valve port of the plug valve is closed, and the gas is cut off.

As shown in fig. 7 and 8, the cylindrical stationary core 2 includes a stationary core main body 201, and both ends of the stationary core main body 201 extend outward to form a first flange portion 203 and a second flange portion 202, respectively, and the axial cross section of the stationary core 2 is "i" shaped, that is, a concave portion 206 is formed between the first flange portion 203 and the second flange portion 202. The coil member 3 may be fitted between the first flange portion 203 and the second flange portion 202, that is, the coil member 3 may be provided in the recess 206. This facilitates positioning of the coil member 3, and prevents the coil member 3 from being separated from the top or bottom of the stationary core 2.

The solenoid valve provided by the present embodiment optimizes the structure of the stationary core, so that the stationary core 2 includes the first flange portion 203, the second flange portion 202, and the recess 206 is provided between the first flange portion 203 and the second flange portion 202, and the coil component 3 can be wound and mounted in the recess 3 when mounted.

In addition, the stationary core 2 in the present embodiment has a columnar structure (preferably, a cylindrical shape), and compared with the U-shaped stationary core in the background art, when the bottom surface diameter of the stationary core 2 is the same, the upper end suction area of the cylindrical stationary core 2 is greater than or equal to 4/3 of the U-shaped stationary core. It should be understood that the electromagnetic force between the static core 2 and the dynamic core 11 of the gas appliance electromagnetic valve has a very close relationship with the attraction area, and the larger the attraction area is, the stronger the electromagnetic force is. Therefore, under the same voltage and with the same area of the bottom surface, the electromagnetic force generated by using the cylindrical stationary core 2 is larger. Correspondingly, when using with the same thermocouple cooperation and reaching same required electromagnetic force, the time that cylindrical quiet core 2 was used is shorter, so, unclamp the required latency of gas-cooker knob and just be short, be difficult to appear unclamping the knob after, because quiet core and movable core suction force are not big enough and the phenomenon of closing the valve port, promote user experience.

Further, as shown in fig. 7, the second flange portion 202 is provided with a notch 205, i.e., an opening penetrating the second flange portion vertically, and a root of the notch 205 may be flush with the outer wall of the stationary core main body 201. The bottom of the stationary core 2 is provided with a groove, and the groove is communicated with the notch 205, in fig. 7, the groove includes a first groove 204a and a through groove 204b, the first groove 204a is communicated with the notch 205 through the through groove 204b, and the first groove 204a may be a circular groove. The coil component 3 is sleeved on the stationary core 2, one end of the coil component is fixed with the valve seat 1, and the other end of the coil component needs to be connected with a needle portion 5 located below the stationary core 2. After the notch 205 and the groove are provided, the coil component 3 may pass through the notch 205 and the groove so that the other end thereof is positioned below the groove, thereby being connected to the pin portion 5 positioned below the groove.

The notch 205 and the groove here serve as a structure for accommodating a part of the coil so as not to interfere with the valve seat 1 extending below the stationary core 2 after the coil part 3 is wound. It will be appreciated that the coil component 3 may be connected to the pin portion 5 in other ways, such as providing an escape passage for the valve seat 1, but obviously the arrangement of the present solution facilitates the machining and does not affect the machining of the valve seat 1.

Example 2

Referring to fig. 10, fig. 10 is a schematic structural view of a second embodiment of the electromagnetic valve of a gas appliance provided in the present invention; FIG. 11 is a schematic view of the magnetic conductive part in FIG. 10; fig. 12 is an enlarged view of the magnetic conductive part, the coil component, and the stationary core of fig. 10.

This embodiment is basically the same as embodiment 1 except that a magnetic permeable part 15 is additionally provided in addition to embodiment 1. The magnetic conductive part 15 is fitted to the outside of the coil component 3. As shown in the figure, after the magnetic conductive part 15 is provided, two closed magnetic circuits can be formed, the magnetic field density is increased, the magnetic field is stronger, and the electromagnetic force is larger under the same current. Further, the magnetic conductive portion 15 is provided on the outer peripheral portion of the coil component 3, and can increase the stability of the housing of the coil component 3. Other structures and operation principles of embodiment 2 are the same as those of embodiment 1, and are not described again.

As shown in fig. 10 and 12, the outer diameter of the first flange portion 203 of the stationary core 2 is larger than the outer diameter of the second flange portion 202; the magnetic conductive portion 15 is located between the first flange portion 203 and the valve seat 1, and as shown in fig. 10, the magnetic conductive portion 15 is located between the first flange portion 203 and the groove bottom surface 101 of the recess portion 106 of the valve seat 1, and the magnetic conductive portion 15 has a first magnetic conductive end portion 151 and a second magnetic conductive end portion 152, both of which protrude radially outward.

Specifically, the first flange portion 203 includes a first outer peripheral wall 203b and a first bottom wall 203c, the second flange portion 202 includes a second outer peripheral wall 202b and a second top wall 202a, the first magnetic end 151 is fixedly connected to the first bottom wall 203c, an inner peripheral wall of the second magnetic end 152 is fixedly connected to the second outer peripheral wall 202b, and an outer peripheral wall of the second magnetic end 152 is fixedly connected to the valve seat 1. The second magnetic conduction end part (152) radially protrudes to form a magnetic conduction boss part 1501, and the annular wall part 107 rivets and fixes the magnetic conduction boss part 1501 of the second magnetic conduction end part 152 by deformation.

As shown in fig. 11, the outer periphery of the second magnetic conduction end portion 152 of the magnetic conduction portion 15 is provided with a magnetic conduction boss portion 1501 extending radially outward, in fig. 10, the top portion of the valve seat 1 is provided with a recessed portion 106, and when the end surface of the second magnetic conduction end portion 152 of the magnetic conduction portion 15 is pressed against the groove bottom surface 101, the annular wall portion 107 of the recessed portion 106 can be caulked against the magnetic conduction boss portion 1501, thereby fixing the magnetic conduction portion 15 more reliably.

Example 3

Referring to fig. 13 and 14, fig. 13 is a schematic structural diagram of a gas appliance electromagnetic valve according to a third embodiment of the present invention; fig. 14 is an enlarged view of the coil component fitted around the outer periphery of the stationary core in fig. 13.

This embodiment is substantially the same as embodiment 1 except that, on the basis of embodiment 1, the coil member includes the main coil 31 and the sub-coil 32, the pin portion also includes the first pin portion 41 and the second pin portion 42, respectively, the first pin portion 41 connects the sub-coil 32, and the second pin portion 42 connects the main coil 31. The primary coil 31 functions as the coil member 3 in example 1, and is energized by a thermocouple, while the secondary coil 32 is directly connected to a power source. As shown in fig. 13, the main coil 31 and the sub-coil 32 extend from the notches and grooves provided in the stationary core 2 to the lower side of the stationary core 2, and are connected to the corresponding pin portions, and the arrangement of the notches and grooves can be understood with reference to embodiment 1.

The sub-coil 32 is sleeved on the periphery of the stationary core 2, an insulating layer 33 is sleeved on the outer side of the sub-coil 32, and the main coil 31 is sleeved on the outer side of the insulating layer 33. By the arrangement, the auxiliary coil 32 can be controlled to be electrified before the thermocouple is heated, so that the time for an operator to keep the position of the knob on the stove can be shortened, and after the thermocouple is heated and the main coil 31 is electrified, the auxiliary coil 32 can be automatically powered off, so that the power consumption is reduced.

Other structures and operation principles of embodiment 3 are the same as those of embodiment 1, and are not described again.

Example 4

Referring to fig. 15 and 16, fig. 15 is a schematic structural diagram of a fourth embodiment of a gas appliance solenoid valve provided in the present invention; fig. 16 is an enlarged view of the magnetic conductive part, the coil component, and the stationary core of fig. 15.

This embodiment is basically the same as embodiment 3 except that in addition to embodiment 3, a magnetic permeable part 15 is additionally provided, and the principle of the magnetic permeable part 15 is the same as that of the magnetic permeable part 15 added in embodiment 2. The magnetic conductive part 15 is sleeved outside the coil, the coil in embodiment 4 includes a main coil 31 and a sub-coil 32, an insulating layer 33 is further disposed between the main coil 31 and the sub-coil 32, and the magnetic conductive part 15 is sleeved outside the outermost main coil 31. In the scheme, the main coil 31 is arranged outside the auxiliary coil 32, the auxiliary coil 32 is directly connected with a power supply and can bear relatively higher voltage, the diameter of the main coil 31 can be selected from thin wires, the main coil 31 is connected with a thermocouple, the voltage is relatively smaller, the diameter of the main coil can be selected from relatively thick wires, the main coil 31 and the insulating layer 33 can equivalently support the auxiliary coil 32, and a framework does not need to be additionally arranged for the auxiliary coil 32.

As shown in fig. 16, by providing the magnetic conductive portion 15, two closed magnetic paths can be formed, the magnetic field density can be increased, the magnetic field can be made stronger, and the electromagnetic force can be made larger by the same current. The magnetic conductive portion 15 is fitted to the outer sides of the main coil 31 and the sub-coil 32, and the stability of fitting the coils can be increased. Other structures and operation principles of embodiment 4 are the same as those of embodiment 3, and are not described again.

As shown in fig. 15 and 16, the outer diameter of the first flange portion 203 of the stationary core 2 is larger than the outer diameter of the second flange portion 202; the magnetic conductive part 15 is located between the first flange part 203 and the valve seat 1, and as shown in fig. 15, the magnetic conductive part 15 is specifically provided between the first flange part 203 and the groove bottom surface 101 of the valve seat 1, and the arrangement manner is the same as that of embodiment 3, and is not described again.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The electromagnetic valve is characterized by comprising a valve rod assembly, a valve seat (1) and an electromagnet assembly, wherein the valve rod assembly comprises a valve rod (12) and a movable core (11), the valve rod (12) is movably connected with the movable core (11), the electromagnet assembly comprises a static core (2) and a coil component (3), the static core (2) comprises a first flange portion (203) and a second flange portion (202), the movable core (11) is driven by the valve rod (12) to be close to or far away from the static core (2), the second flange portion (202) is fixedly connected with the valve seat (1), a concave portion (206) is formed between the first flange portion (203) and the second flange portion (202), and the coil component (3) is located in the concave portion (206).

2. The solenoid valve according to claim 1, further comprising a magnetically conductive portion (15), wherein the magnetically conductive portion (15) is located at an outer peripheral portion of the coil member (3), and wherein the magnetically conductive portion (15) is fixedly connected to the stationary core (2) and/or the valve seat (1).

3. The solenoid valve according to claim 2, characterised in that said magnetically conductive portion (15) comprises a first magnetically conductive end (151) and a second magnetically conductive end (152), said first magnetically conductive end (151) being fixedly connected to said first flange portion (203) and said second magnetically conductive end (152) being fixedly connected to said second flange portion (202), said second flange portion (202) being fixedly connected directly or indirectly to said valve seat (1).

4. The solenoid valve according to claim 3, characterised in that said valve seat (1) is provided with a recess (106), said recess (106) having an annular wall portion (107), said first flange portion (203) comprising a first peripheral wall (203b) and a first bottom wall (203c), said second flange portion (202) comprising a second peripheral wall (202b) and a second top wall (202a), said first magnetically conductive end portion (151) being fixedly connected to said first bottom wall (203c) and an inner peripheral wall of said second magnetically conductive end portion (152) being fixedly connected to said second peripheral wall (202b), an outer peripheral wall of said second magnetically conductive end portion (152) being fixedly connected to said valve seat (1); the second magnetic conduction end part (152) protrudes in the radial direction to form a magnetic conduction boss part (1501), and the annular wall part (107) rivets and fixes the magnetic conduction boss part (1501) of the second magnetic conduction end part (152) through deformation.

5. The solenoid valve according to claim 1, characterized in that it further comprises at least one pin portion (5), said second flange portion (202) being provided with a notch (205) and a groove communicating with said notch (205), one end of said coil member (3) passing through said notch (205) and said groove to connect with said pin portion (5).

6. The solenoid valve according to claim 5, characterized in that said notch (205) is located in a side wall of said second flange portion (202) and said groove is located in a bottom of said second flange portion (202), said groove comprising a first groove (204a) and a through groove (204b) in communication, said through groove (204b) communicating with said notch (205).

7. The solenoid valve according to any of the claims from 1 to 6, characterized in that said coil assembly (3) comprises a primary coil (31) and a secondary coil (32), said secondary coil (32) being housed in said recess (206) of said stationary core (2), said secondary coil (32) being externally sheathed with an insulating layer (33), said insulating layer (33) being externally sheathed with said primary coil (31).

8. The solenoid valve according to claim 8, characterized in that said needle portion (5) comprises a first needle portion (51) and a second needle portion (52), one end of said secondary coil (32) being connected to said second needle portion (52), one end of said primary coil (31) being connected to said first needle portion (51).