CN114458769A - A Quick Response Piloted Solenoid Valve Structure - Google Patents

Abstract

The invention discloses a pilot type electromagnetic valve structure with quick response, which comprises an electromagnet assembly, a spring assembly, a pilot valve assembly and a main valve assembly, wherein the electromagnet assembly generates suction force after a coil is electrified, the pilot valve assembly overcomes the spring force of a pilot spring to move upwards, the pressure in a control cavity is reduced through a pressure relief channel, so that a main valve moves upwards after a pressure difference is generated between an inlet channel and the control cavity of the main valve core, the coil moves downwards under the action of the spring force of the pilot spring after being powered off, an armature can continue to move downwards after a pilot sealing element stops, the end surface of a seal A1 and the end surface of a seal A2 form a sealing surface A again from a separated state, the pressure in the control cavity rises again through the pilot channel, and the main valve core is seated to form a sealing surface B Low pressure-resistant grade, poor sealing performance and the like.

Description

A Quick Response Piloted Solenoid Valve Structure

technical field

The invention relates to the field of solenoid valves, in particular to a fast-response pilot type solenoid valve structure.

Background technique

Normally closed solenoid valve used in high pressure hydraulic system or pneumatic system is often used pilot solenoid valve in order to ensure that the solenoid valve does not leak under high pressure. After the power is turned on, the electromagnetic force attracts the pilot spool. At this time, the pilot channel is connected to the pressure relief hole, the pressure of the upper cavity of the main spool is reduced, and the main spool pushes the main spool to open under the action of the pressure difference between the upper and lower chambers.

At present, the application fields of pilot solenoid valve include new energy vehicle field, clean energy field, fuel system, etc. The main disadvantages of existing pilot solenoid valve products are slow response speed, serious wear of seals, some products have external communication pipelines and Low pressure rating.

In the patent of the existing application publication number CN 110594479A "a kind of pilot solenoid valve in a bottle mouth valve", the connecting sleeve is connected with the valve body and the fixed iron core, and the movable iron core drives the sleeve to move up and down, which is composed of The mass of the moving parts is large, and it is easy to have a large impact on the fixed parts and cause wear, which affects the sealing performance.

In the patent of the existing application publication number CN 110388474A "a fast response miniaturized pilot solenoid valve", the medium in the back pressure cavity will be discharged into the atmosphere after the solenoid valve is energized. If it is applied to the field of hydrogen fuel cells Or in the chemical field, accidents will be caused by medium leakage.

Therefore, it is urgent to develop a fast-response pilot solenoid valve to meet the needs of fuel cell technology development and other industries.

SUMMARY OF THE INVENTION

In view of the above-mentioned problems, the purpose of the present invention is to provide a pilot-operated solenoid valve structure with good sealing performance, high pressure resistance level and fast response speed.

To achieve the above object, the technical scheme adopted in the present invention is:

A quick-response pilot solenoid valve structure includes an electromagnet assembly, a spring assembly, a pilot valve assembly and a main valve assembly, the pilot valve assembly is installed in the electromagnet assembly through the spring assembly, and the main valve assembly is installed through the spring assembly. A valve assembly is connected to the electromagnet assembly to mount the pilot valve assembly and the spring assembly therein.

Preferably, the above-mentioned electromagnet assembly includes a magnetic isolation sleeve, a coil, a compression nut, a tight cap and a nozzle body, and the bottom of the tight cap is a conical surface or a flat surface.

Preferably, the above-mentioned pilot valve assembly includes an armature, a pilot valve core and a pilot seal, the pilot seal is nested at the lower end of the pilot valve core, the pilot valve core is located in the inner hole of the armature, and the armature can drive the The pilot spool and pilot seal move up and down.

Preferably, the above-mentioned spring assembly includes a spring upper seat, a pilot spring, a return spring, a washer, and a limit block, the spring upper seat is connected to the lower end of the tight cap in the above-mentioned electromagnet assembly, and the limit block is installed in the above-mentioned electromagnet assembly At the inner hole of the nozzle body, the limit block is axially limited by the gasket, the two ends of the pilot spring are respectively connected with the upper seat of the spring and the pilot valve core in the pilot valve assembly, the return spring Both ends are respectively connected with the gasket and the armature in the pilot valve assembly, and the pilot valve assembly can move up and down in the spring assembly.

Preferably, the main valve assembly includes a main valve core, a main valve sealing ring, and a main valve seat, the main valve sealing ring is located at the groove of the sealing ring on the main valve core, and the main valve seat is provided with an inlet channel, The main valve core is provided with a pressure relief channel and a pilot channel parallel to the axis, and the main valve core can move up and down between the main valve seat and the washer in the spring assembly.

Preferably, the main valve assembly is connected with the electromagnet assembly to connect the spring assembly and the pilot valve assembly, and the pilot valve assembly is connected to the tight cap and the spacer in the electromagnet assembly. The cavity formed by the magnetic sleeve is a spring upper cavity, the cavity formed between the main valve assembly and the pilot valve assembly is a control cavity, and the pilot passage communicates with the inlet passage and the control cavity.

Preferably, when the coil is not energized, the end face of the seal A1 of the pilot seal in the pilot valve assembly and the end face of the seal A2 of the main valve core in the main valve assembly form a seal face A, and the seal face A In the main valve assembly, the end face of the main valve seal B1 and the end face of the main valve seat seal B2 form a sealing face B, and the form of the sealing face B can be a plane or a conical face.

Preferably, after the electromagnet assembly is energized, a suction force is generated, the pilot valve assembly moves upward against the spring force of the pilot spring, and the sealing surface A is separated so that the control chamber and the back pressure chamber are relieved through pressure relief The channel is connected, and the pressure in the control chamber is reduced through the pressure relief channel, so that the main valve moves upward after the pressure difference between the inlet channel and the control chamber is generated, and the end face of the seal B1 and the seal The separation of the end face of B2 makes the medium in the inlet channel flow out to the back pressure chamber. After the coil is de-energized, the pilot valve assembly moves downward under the action of the spring force of the pilot spring. After the pilot seal stops, the armature can Continue to move downward, the end face of the seal A1 and the end face of the seal A2 form the seal face A again from the separated state, the passage between the control cavity and the back pressure cavity is blocked by the seal face A, and the The pressure rises again through the pilot passage, and the main spool moves downward under the action of the pressure difference between the control chamber and the inlet passage, so that the end face of the seal B1 and the end face of the seal B2 form the seal face B again.

In the present invention, there are two deformation structures for the moving part assembly formed by the pilot valve assembly and the main valve. The first deformation structure of the moving assembly is shown in Figure 9, which includes the armature, the pilot valve core, the main valve core and the main valve sealing ring , the pilot valve core is nested in the armature, the second type of deformation structure of the moving component is shown in Figure 10, including the armature, the pilot valve core, the main valve core and the main valve sealing ring, all the main valve core The pilot channel and the pressure relief channel are coaxial.

In the present invention, a deformed structure of the above electromagnet assembly is shown in Figure 11, wherein the deformed structure of the electromagnet assembly is composed of a magnetic isolation sleeve, a magnetic conductive pad, a coil, a compression nut, and a tight cap. The magnetic conductive pad Installed on the magnetic isolation sleeve.

In the present invention, the above-mentioned main valve assembly has two deformation structures. The first deformation structure of the main valve assembly is shown in Figure 12. It consists of a main valve core, a main valve core sealing ring, a guide sleeve, a main valve seat, and a valve seat cap The main valve seat is installed on the guide sleeve through the valve seat cap, and the sealing form of the sealing surface B formed by the main valve core and the main valve seat can be a conical surface seal or a plane seal, so The second deformation structure of the main valve assembly is shown in Figure 13, which consists of a main valve core, a main valve core sealing ring, a guide sleeve, a main valve seat, and a valve seat cap. The main valve seat is nested in the valve seat cap. On the outer hole, the sealing surface B formed by the main valve core and the main valve seat is in the form of a plane seal, and the main valve core and the upper end surface of the valve seat cap form an axial positioning, which improves the sealing performance.

Description of drawings

The accompanying drawings, which form a part hereof, are used to provide a further understanding of the invention, and to make other features, objects and advantages of the invention more apparent. The accompanying drawings and descriptions of the exemplary embodiments of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a quick-response pilot solenoid valve according to an embodiment of the present invention;

2 is a schematic diagram of the opening operation of the pilot valve of the pilot solenoid valve according to the embodiment of the present invention;

3 is a schematic diagram of the opening operation of the main valve of the pilot solenoid valve according to the embodiment of the present invention;

4 is a schematic diagram of a solenoid coil assembly of a pilot solenoid valve according to an embodiment of the present invention;

5 is a schematic diagram of a pilot valve assembly of a pilot solenoid valve according to an embodiment of the present invention;

6 is a schematic diagram of a spring assembly of a pilot solenoid valve according to an embodiment of the present invention;

7 is a schematic diagram of a main valve assembly of a pilot solenoid valve according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a moving assembly of a pilot solenoid valve according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of the deformation structure 1 of the pilot solenoid valve moving assembly according to the embodiment of the present invention;

10 is a schematic diagram of the deformation structure 2 of the pilot solenoid valve moving assembly according to the embodiment of the present invention;

11 is a schematic diagram of a deformation structure of an electromagnet assembly of a pilot solenoid valve according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of the first deformation structure of the pilot solenoid valve according to the embodiment of the present invention;

FIG. 13 is a schematic diagram of the second variant of the pilot solenoid valve according to the embodiment of the present invention;

Reference number meaning: 01 magnetic isolation sleeve; 02 coil; 03 compression nut; 04 tight cap; 05 spring seat; 06 pilot spring; 07 armature; 08 pilot valve core; 09 return spring; 10 pilot seal; 11 main valve Sealing ring; 12 main valve core; 13 main valve seat; 14 gasket; 15 limit block; 16 nozzle body; 17 pilot channel; 18 inlet channel; 19 pressure relief channel; 20 back pressure chamber; 21 control chamber; 22 spring Upper chamber; 23 seal A1 end face; 24 seal A2 end face; 25 seal B1 end face; 26 seal B2 end face; 27 seal face A; 28 seal face B; 29 magnetic pad; 30 guide sleeve; 31 valve seat cap; 001 pilot Solenoid valve; 002 solenoid assembly; 003 pilot valve assembly; 004 main valve assembly; 005 spring assembly.

Detailed ways

The purpose of the present invention is to provide a quick-response pilot solenoid valve structure, which can be used in the field of hydrogen energy and also in the field of natural gas.

In order to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention.

It should be noted that the terms "first", "second", etc. used in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", The orientation or positional relationship indicated by "vertical", "horizontal", "horizontal", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are primarily used to better describe the invention and its embodiments, and are not intended to limit the fact that the indicated device, element or component must have a particular orientation, or be constructed and operated in a particular orientation.

Furthermore, the terms "installed", "set up", "provided with", "connected", "connected", "socketed" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediary, or between two devices, elements, or components. internal communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

1-12 are a specific embodiment of the present invention. A quick-response pilot solenoid valve 001 structure includes an electromagnet assembly 002, a spring assembly 005, a pilot valve assembly 003 and a main valve assembly 004, the pilot valve assembly 003 is mounted on the electromagnet through the spring assembly 005 In the assembly 002, the main valve assembly 004 is connected with the electromagnet assembly 002 to install the pilot valve assembly 003 and the spring group 005 therein.

Preferably, the above-mentioned electromagnet assembly 002 includes a magnetic isolation sleeve 01, a coil 02, a compression nut 03, a tightening cap 04 connected to the nozzle body 16, and the bottom of the tightening cap 04 is a conical surface or a plane.

Preferably, the above-mentioned pilot valve assembly 003 includes an armature 07 , a pilot valve core 08 and a pilot seal 10 , the pilot seal 10 is nested at the lower end of the pilot valve core 08 , and the pilot valve core 08 is located in the inner hole of the armature 07 , the armature 07 can drive the pilot valve core 08 and the pilot seal 10 to move up and down.

Preferably, the above-mentioned spring assembly 005 includes a spring upper seat 05, a pilot spring 06, a return spring 09, a washer 14, and a limit block 15. The spring upper seat 05 is connected to the lower end of the tightening cap 04 in the above-mentioned electromagnet assembly 002. The position block 15 is installed at the inner hole of the nozzle body 16 in the above electromagnet assembly 002, the limit block 15 is axially limited by the washer 14, and the two ends of the pilot spring 06 are respectively connected to the upper seat of the spring. 05 is connected with the pilot valve core 08 in the above-mentioned pilot valve assembly 003, and the two ends of the return spring 09 are respectively connected with the washer 14 and the armature 07 in the above-mentioned pilot valve assembly 003. The pilot valve assembly 003 is in the The spring assembly 005 can move up and down.

Preferably, the above-mentioned main valve group 004 includes a main valve core 12, a main valve sealing ring 11, and a main valve seat 13. The main valve sealing ring 11 is located at the groove of the sealing ring 11 on the main valve. The seat 13 is provided with an inlet channel 18, the main valve core 12 is provided with a pressure relief channel 19 and a pilot channel 17 parallel to the axis, the main valve core 12 can be in the main valve seat 13 and the above-mentioned spring assembly 005 The spacers 14 move up and down.

Preferably, the main valve assembly 004 is connected with the electromagnet assembly 002 to connect the spring assembly 005 and the pilot valve assembly 003, the pilot valve assembly 003 and the electromagnet assembly 002 described in The cavity formed by the tight cap 04 and the magnetic isolation sleeve 01 is the upper spring cavity 22 , the cavity formed between the main valve assembly 004 and the pilot valve assembly 003 is the control cavity 21 , and the pilot passage communicates with the cavity 21 . The inlet channel 18 and the control chamber 21 are connected.

Preferably, when the coil 02 is not energized, the sealing surface 23 of the pilot seal 10 in the pilot valve assembly 003 and the sealing A2 end surface 24 of the main valve core 12 in the main valve assembly 004 form a sealing surface A27, the form of the sealing surface A27 can be a plane or a conical surface. In the main valve assembly 004, the main valve seal B1 end surface 25 and the main valve seat 13 seal B2 end surface 26 form a sealing surface B28, the seal The form of the face B28 may be a plane or a conical face.

Preferably, after power-on, the electromagnet assembly 002 generates suction, the pilot valve assembly 003 moves upward against the spring force of the pilot spring 06, and the sealing surface A27 is separated so that the control chamber 21 and the back pressure chamber are separated 20 is communicated through the pressure relief channel 19, and the pressure in the control chamber 21 is reduced through the pressure relief channel 19, so that the main valve core 12 after the inlet channel 18 and the control chamber 21 generate a pressure difference, the main valve core 12 Moving upward, the end face 25 of the seal B1 is separated from the end face 26 of the seal B2, so that the medium in the inlet channel 18 flows out to the back pressure chamber 20. After the coil 02 is de-energized, the pilot valve assembly 003 is under the spring force of the pilot spring 06. The armature 07 can continue to move downward after the pilot seal 10 stops, and the end face 23 of the seal A1 and the end face 24 of the seal A2 form the seal face A27 again from the separated state. The passage between the control chamber 21 and the back pressure chamber 20 is blocked by the sealing surface A27, the pressure in the control chamber 21 rises again through the pilot passage 17, and the main spool 12 is pressed between the control chamber 21 and the inlet passage 18. The downward movement under the differential action causes the end face 25 of the seal B1 and the end face 26 of the seal B2 to form the seal face B28 again.

In the present invention, there are two deformation structures of the moving component assembly 006 formed by the pilot valve assembly 003 and the main valve core 12. The first deformation structure of the moving component is shown in Figure 9, including the armature 07, the pilot valve core 08, the main valve The core 12 and the main valve sealing ring 11, the pilot valve core 08 is nested in the armature 07, the second deformation structure of the moving component is shown in Figure 10, including the armature 07, the pilot valve core 08, the main valve core 12 and the main valve sealing ring 11, the pilot passage 17 of the main valve core 08 and the pressure relief passage 19 are coaxial.

In the present invention, a deformation structure of the electromagnet assembly 002 is shown in FIG. 11 , wherein the deformation structure of the electromagnet assembly 002 is composed of a magnetic isolation sleeve 01 , a magnetic conductive pad 29 , a coil 02 , a compression nut 03 , and a clamping cap 04 composition, the magnetic conductive pad 29 is installed on the magnetic isolation sleeve 01 .

In the present invention, the above-mentioned main valve assembly 004 has two deformation structures. The first deformation structure of the main valve assembly 004 is shown in FIG. 12 . The main valve seat 13 is installed on the guide sleeve 30 through the valve seat cap 31, and the sealing surface B28 formed by the main valve core 12 and the main valve seat 13 is formed by the seat 13 and the valve seat cap 31. The sealing form can be a conical surface seal or a plane seal. The second deformation structure of the main valve assembly 004 is shown in Figure 13. The main valve core 12, the main valve core sealing ring 11, the guide sleeve 30, the main valve seat 13, the valve The main valve seat 13 is nested on the outer hole of the valve seat cap 31. The sealing surface B28 formed by the main valve core 12 and the main valve seat 13 is in the form of a plane seal. The main valve core 12 is axially positioned with the upper end surface of the valve seat cap 31, which improves the sealing performance.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. The present invention is not limited to application in the technical field of solenoid valves, but also includes other technical fields requiring application of control valve products. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A quick-response pilot-operated solenoid valve structure is characterized by comprising a solenoid assembly, a spring assembly, a pilot valve assembly and a main valve assembly, wherein the pilot valve assembly is installed in the solenoid assembly through the spring assembly, and the pilot valve assembly and the spring assembly are installed in the solenoid assembly through the connection of the main valve assembly and the solenoid assembly.

2. The structure of a quick-response pilot operated solenoid valve according to claim 1, wherein the electromagnet assembly comprises a magnetic isolation sleeve, a coil, a compression nut, a locking cap and a nozzle body, and the bottom of the locking cap is a conical surface or a flat surface.

3. The quick-response pilot-operated solenoid valve structure according to claim 1, wherein the pilot valve assembly comprises an armature, a pilot valve spool and a pilot sealing member, the pilot sealing member is nested at a lower end of the pilot valve spool, the pilot valve spool is located in the inner bore of the armature, and the armature can drive the pilot valve spool and the pilot sealing member to move up and down.

4. The quick-response pilot-operated solenoid valve structure as claimed in claim 1, wherein the spring assembly comprises an upper spring seat, a pilot spring, a return spring, a spacer and a limiting block, the upper spring seat is connected with the lower end of a tightening cap of the solenoid assembly, the limiting block is installed at the inner hole of a nozzle body of the solenoid assembly, the limiting block is axially limited by the spacer, two ends of the pilot spring are respectively connected with the upper spring seat and a pilot valve core of the pilot valve assembly, two ends of the return spring are respectively connected with the spacer and the armature of the pilot valve assembly, and the pilot valve assembly can move up and down in the spring assembly.

5. A rapid response pilot operated solenoid valve structure as set forth in claim 1 wherein said main valve assembly comprises a main valve spool, a main valve seal seated in a seal groove in said main valve spool, a main valve seat having an inlet passage, said main valve spool having a pressure relief passage and a pilot passage parallel to the axis, said main valve spool being movable up and down between said main valve seat and said spacer in said spring assembly.

6. The structure of claim 1, wherein the main valve assembly connects the spring assembly and the pilot valve assembly by connecting with the electromagnet assembly, a cavity formed by the tightening cap and the magnetic isolating sleeve in the electromagnet assembly and the pilot valve assembly is an upper spring cavity, a cavity formed between the main valve assembly and the pilot valve assembly is a control cavity, and the pilot channel connects the inlet channel and the control cavity.

7. A fast response pilot operated solenoid valve arrangement as claimed in claims 1-6 wherein when said coil is de-energized, said pilot seal a1 end face of said pilot valve assembly and said main valve spool seal a2 end face of said main valve assembly form a sealing face a, which may be in the form of a flat or conical face, said main valve seal B1 end face of said main valve assembly and said main valve seat seal B2 end face form a sealing face B, which may be in the form of a flat or conical face.

8. The structure of claim 1-6, wherein the electromagnet assembly generates attraction force when it is energized, the pilot valve assembly moves upward against the spring force of the pilot spring, the sealing surface A separates to connect the control chamber and the back pressure chamber through a pressure relief channel, the pressure in the control chamber is reduced through the pressure relief channel, the main valve moves upward after the pressure difference between the inlet channel and the control chamber is generated, the sealing B1 end surface separates from the sealing B2 end surface to allow the medium in the inlet channel to flow out to the back pressure chamber, after the coil is de-energized, the pilot valve assembly moves downward under the action of the spring force of the pilot spring, after the pilot sealing element stops, the armature can continue to move downward, the sealing surface A1 end surface and the sealing A2 end surface form the sealing surface A again from the separated state, the channel between the control cavity and the back pressure cavity is blocked by a sealing surface A, the pressure in the control cavity is increased again through a pilot channel, and the main valve core moves downwards under the action of the pressure difference between the control cavity and the inlet channel to enable the end face of the seal B1 and the end face of the seal B2 to form a sealing surface B again.

9. The structure of a pilot-operated solenoid valve with fast response according to claims 2-6, wherein there are two kinds of deformation structures for the moving component assembly formed by the pilot valve assembly and the main valve, the first kind of deformation structure for the moving component assembly is shown in fig. 9, which includes the armature, the pilot valve core, the main valve core and the main valve sealing ring, the pilot valve core is nested in the armature, the second kind of deformation structure for the moving component assembly is shown in fig. 10, which includes the armature, the pilot valve core, the main valve core and the main valve sealing ring, the pilot passage of the main valve core is coaxial with the pressure relief passage, and one kind of deformation structure for the electromagnet assembly is shown in fig. 11, wherein the deformation structure for the electromagnet assembly is composed of a magnetism isolating sleeve, a magnetism guiding pad, a coil, a gland nut and a tightening cap, and the magnetism guiding pad is installed on the magnetism isolating sleeve.

10. A quick-response pilot operated solenoid valve structure according to claim 5 wherein there are two variants of said main valve assembly, the first variant of said main valve assembly is shown in FIG. 12 and comprises a main valve spool, a main valve spool seal ring, a guide housing, a main valve seat, and a valve seat cap, said main valve seat is mounted on said guide housing through said valve seat cap, the seal form of said main valve spool and said main valve seat forming a sealing surface B can be either a conical seal or a planar seal, the second variant of said main valve assembly is shown in FIG. 13 and comprises a main valve spool, a main valve spool seal ring, a guide housing, a main valve seat, and a valve seat cap, said main valve seat is nested on said valve seat cap outer bore, said main valve spool and said main valve seat forming a sealing surface B in a planar seal, said main valve spool and said valve seat cap forming an axial positioning, the sealing performance is improved.

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