Electromagnetic valve

Abstract

The electromagnetic valve comprises a valve shell and a lower sealing plate assembled at the bottom of the valve shell, a guide sleeve, an upper coil and a magnet are arranged in the valve shell, the upper coil and the magnet are arranged on the circumferential outer side of the guide sleeve in a sleeving mode, and the magnet divides the assembling space of the valve shell into an upper cavity and a lower cavity which are arranged in the vertical direction; the upper coil is arranged in one of the upper cavity and the lower cavity; an upper iron core and a lower iron core are fixed in the guide sleeve, the upper iron core and the lower iron core are arranged up and down in the vertical direction, a valve element moving in the vertical direction is arranged in the guide sleeve, and the valve element is provided with a transmission rod; the lower iron core penetrates through the lower sealing plate and extends to the outside, and the transmission rod penetrates through the lower iron core and extends to the outside; sealing rings are arranged between the upper iron core and the valve shell and between the lower iron core and the lower sealing plate. According to the electromagnetic valve, the air tightness advantage of an inner valve element and the advantages of small size and low power consumption of an outer valve element can be integrated, so that the requirements of different application scenes are met, and development of related industries and upgrading and updating of products are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to a solenoid valve. Background Art

[0002] In the field of gas and water valve products, solenoid valves are widely used as key components. They realize various functions by switching between two different states: open and closed. At present, solenoid valves on the market are mainly divided into two types: internal valve core and external valve core.

[0003] The valve core of the internal valve core solenoid valve is built inside the solenoid valve, and the movable valve core cannot be seen from the outside. Its advantage is good air tightness and can be used in gas or water products. However, the internal valve core solenoid valve has many disadvantages. For example, the coil needs to be powered all the time to maintain the change of state, which leads to high power consumption, high heat generation, easy burning, and difficult to maintain long-term use. At the same time, it is large in size and high in cost, and cannot be used in small products.

[0004] The valve core of the external valve core solenoid valve protrudes from the outside of the solenoid valve, and the active valve core can be seen from the outside. Its advantages are that it can be small in size and consumes less power when maintaining the changed state. However, the external valve core solenoid valve cannot achieve airtightness and cannot be used in products such as gas or water circuits that require airtightness.

[0005] The two existing types of solenoid valve structures have their own advantages and disadvantages, and it is difficult to simultaneously meet the requirements of small size, low cost, good sealing, low power consumption, and long-term stable use. In fields such as gas appliances that require high air tightness, as well as various high-end intelligent control products, there is an urgent need for a new type of solenoid valve that can combine the air tightness advantages of the inner valve core type with the small size and low power consumption advantages of the outer valve core type, so as to meet the needs of different application scenarios and promote the development of related industries and product upgrades. Summary of the invention

[0006] In order to overcome at least one of the defects of the prior art described above, according to one aspect of the present invention, a solenoid valve is provided, comprising a valve housing and a lower sealing plate assembled at the bottom of the valve housing, wherein a guide sleeve, an upper coil and a magnet are arranged in the valve housing, wherein the upper coil and the magnet are arranged on the circumferential outer side of the guide sleeve, wherein the magnet divides the assembly space of the valve housing into an upper cavity and a lower cavity arranged in a vertical direction, wherein the upper coil is arranged in one of the upper cavity and the lower cavity;

[0007] An upper iron core and a lower iron core are fixed in the guide sleeve, and the upper iron core and the lower iron core are arranged up and down in the vertical direction. A valve core moving in the vertical direction is arranged in the guide sleeve, and the valve core is provided with a transmission rod; the lower iron core passes through the lower sealing plate and extends to the outside, and the transmission rod passes through the lower iron core and extends to the outside;

[0008] Sealing rings are arranged between the upper iron core and the valve housing and between the lower iron core and the lower sealing plate.

[0009] In one embodiment of the present application, the valve housing includes a transverse top section and vertical side sections arranged at the bottom of both ends of the transverse top section, and the transverse top section and a pair of vertical side sections surround and form an assembly space that is arranged through in a horizontal direction.

[0010] In one embodiment of the present application, a limiting pad is provided on the bottom of the upper iron core toward the valve core.

[0011] In one embodiment of the present application, it further includes a lower coil, the lower coil is sleeved on the circumferential outer side of the guide sleeve, and the upper coil, the magnet and the lower coil are arranged in sequence from top to bottom in the vertical direction;

[0012] The upper coil is arranged in the upper cavity, and the lower coil is arranged in the lower cavity.

[0013] In one embodiment of the present application, it also includes a mounting bracket and a magnetic sensor disposed on the mounting bracket;

[0014] The upper coil is disposed in one of the upper cavity and the lower cavity, and the mounting and fixing bracket is detachably inserted in the other of the upper cavity and the lower cavity;

[0015] The solenoid valve also includes a prompt unit, which is communicatively connected to a magnetic sensor, and the magnetic sensor is used to sense magnetic changes to determine whether the solenoid valve is in place; when the solenoid valve is in place, the magnetic sensor feeds back a signal to the prompt unit, and the prompt unit gives a prompt.

[0016] In one embodiment of the present application, the upper coil, the magnet and the magnetic sensor are arranged in sequence from top to bottom in the vertical direction, the upper coil is arranged in the upper cavity, and the mounting and fixing bracket is arranged in the lower cavity.

[0017] In one embodiment of the present application, the vertical side section of the valve housing has a slot, and the mounting and fixing bracket is provided with a buckle. When the mounting and fixing bracket is inserted into the valve housing, the buckle is used to be snapped into the slot.

[0018] In one embodiment of the present application, the mounting and fixing bracket includes a bracket main body section and a pair of buckle side sections arranged on the bracket main body section;

[0019] A pair of buckle side segments are arranged on the same side of the bracket main body segment and arranged inwardly, so as to leave abutment segments arranged outwardly at both ends of the bracket main body segment;

[0020] The respective clamping blocks of a pair of buckle side sections are arranged opposite to each other;

[0021] The valve housing has a pair of vertical side sections, each of which is provided with recessed slots on both sides along the through direction of the assembly space, and the two slots are a first slot and a second slot;

[0022] When the mounting and fixing bracket is inserted into the valve housing, a clamping block of a buckle side section is clamped into a first clamping groove of a vertical side section, and one of the abutting sections is clamped into a second clamping groove of the same vertical side section.

[0023] In one embodiment of the present application, a power supply unit is further included, and the power supply unit is electrically connected to the magnetic sensor and is used to power the magnetic sensor with a 3V voltage.

[0024] In one embodiment of the present application, the valve core, the upper iron core and the lower iron core are made of the same material.

[0025] In summary, the solenoid valve provided by the present invention has the following technical effects:

[0026] The solenoid valve of the present application can combine the airtightness advantages of the inner valve core type with the small size and low power consumption advantages of the outer valve core type to meet the needs of different application scenarios and promote the development of related industries and product upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a solenoid valve according to an embodiment of the present invention;

[0028] Figure 2 A front view of a solenoid valve according to an embodiment of the present invention;

[0029] Figure 3 A cross-sectional view of the internal structure of a solenoid valve according to an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of another structure of the solenoid valve according to an embodiment of the present invention;

[0031] Figure 5 Another structural schematic diagram of the solenoid valve according to an embodiment of the present invention;

[0032] Figure 6 A front view of a solenoid valve according to another embodiment of the present invention;

[0033] Figure 7 A cross-sectional view of the internal structure of a solenoid valve according to another embodiment of the present invention;

[0034] Figure 8 A front view of another structure of a solenoid valve according to another embodiment of the present invention;

[0035] Fig. 9 A schematic structural diagram of a solenoid valve according to another embodiment of the present invention;

[0036] Fig.10 A front view of a solenoid valve according to another embodiment of the present invention;

[0037] Fig.11 A cross-sectional view of the internal structure of a solenoid valve according to another embodiment of the present invention;

[0038] Fig.12 A front view of another structure of a solenoid valve according to another embodiment of the present invention;

[0039] Fig.13 It is a structural schematic diagram of a mounting and fixing bracket of a solenoid valve according to another embodiment of the present invention;

[0040] Fig.14 A schematic structural diagram of a valve housing of a solenoid valve according to another embodiment of the present invention;

[0041] Fig.15 This is a structural schematic diagram of a solenoid valve installed on an external device according to another embodiment of the present invention;

[0042] Fig.16 A cross-sectional view of the internal structure of a solenoid valve assembled on an external device according to another embodiment of the present invention;

[0043] Figures: 1-valve housing, 11-upper cavity, 12-lower cavity, 13-lateral top section, 14-vertical side section, 141-first slot, 142-second slot, 2-lower sealing plate, 3-guide sleeve, 31-upper iron core, 32-lower iron core, 33-limiting pad, 4-upper coil, 5-magnet, 6-valve core, 61-transmission rod, 7-sealing ring, 8-lower coil, 9-installation and fixing bracket, 91-bracket main section, 911-abutment section, 92-buckle side section, 921-block, 10-magnetic sensor, 20-manual operation connecting rod, 30-manual operation button, 40-spring, 50-external equipment. DETAILED DESCRIPTION

[0044] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0047] Given that the two types of existing solenoid valve structures each have their own advantages and disadvantages, it is difficult to simultaneously meet the requirements of small size, low cost, good sealing, low power consumption, and long-term stable use. To this end, the embodiment of the present application discloses a solenoid valve that combines the advantages of an inner valve core solenoid valve and an outer valve core solenoid valve to better meet the needs of users.

[0048] Example 1 Single-hold solenoid valve

[0049] The following combination Figure 1-Figure 5 The solenoid valve of the present application is described.

[0050] Specifically, a solenoid valve comprises a valve housing 1 and a lower sealing plate 2 assembled on the bottom of the valve housing 1, a guide sleeve 3, an upper coil 4 and a magnet 5 are arranged in the valve housing 1, the upper coil 4 and the magnet 5 are sleeved on the circumferential outer side of the guide sleeve 3, the magnet 5 divides the assembly space of the valve housing 1 into an upper cavity 11 and a lower cavity 12 arranged in the vertical direction, the upper coil 4 is arranged in one of the upper cavity 11 and the lower cavity 12; an upper iron core 31 and a lower iron core 32 are fixed in the guide sleeve 3, the upper iron core 31 and the lower iron core 32 are arranged up and down in the vertical direction, a valve core 6 moving in the vertical direction is arranged in the guide sleeve 3, and the valve core 6 is provided with a transmission rod 61; the lower iron core 32 passes through the lower sealing plate 2 and extends to the outside, and the transmission rod 61 passes through the lower iron core 32 and extends to the outside; a sealing ring 7 is arranged between the upper iron core 31 and the valve housing 1 and between the lower iron core 32 and the lower sealing plate 2.

[0051] In this specific embodiment, the solenoid valve is specifically a normally closed or normally open solenoid valve. For example, when the upper coil 4 is arranged in the upper cavity 11, that is, the upper coil 4 is arranged above the magnet 5, in this specific structure, the solenoid valve is a normally closed solenoid valve, that is, before the solenoid valve is energized to work, the solenoid valve is in a closed state, and the gas path or the water path cannot circulate.

[0052] For example, when the upper coil 4 is arranged in the lower cavity 12, that is, the upper coil 4 is arranged below the magnet 5, in this specific structure, the solenoid valve is a normally open solenoid valve, that is, before the solenoid valve is energized to work, the solenoid valve is in an open state, and the gas path or the water path can always flow.

[0053] In order to better describe the inventive concept of the present application, a normally closed solenoid valve is now described. Figure 2 .

[0054] When the solenoid valve needs to be opened, the magnetic field generated by the power supply of the upper coil 4 causes the valve core 6 to move upward, and the movement of the valve core 6 drives the transmission rod 61 to move together. The transmission rod 61 passes through the lower iron core 32 and the lower sealing plate 2 and extends to the outside, and can be connected to the external device 50, thereby realizing the control of the external device 50. At this time, the closed state will be changed to the open state. Even if the current of the upper coil 4 is cut off and the magnetic field disappears, the open state can still be maintained without power supply. When it is necessary to close, the closed state can be restored manually.

[0055] If the solenoid valve is a normally open solenoid valve, please refer to Figure 4 When the solenoid valve needs to be opened, the magnetic field generated by the power supply of the upper coil 4 causes the valve core 6 to move downward, and the movement of the valve core 6 drives the transmission rod 61 to move together. The transmission rod 61 passes through the lower iron core 32 and the lower sealing plate 2 and extends to the outside, and can be connected to the external device 50, thereby realizing the control of the external device 50. At this time, the open state will be changed to the closed state. Even if the current of the upper coil 4 is cut off and the magnetic field disappears, the closed state can still be maintained, and power supply is not required. When it is necessary to open, the open state can be restored manually.

[0056] In this regard, in traditional solenoid valves, continuous power supply is required to maintain the state, resulting in a large amount of electrical energy being wasted. However, the solenoid valve does not need to be continuously powered after the state changes, which can significantly reduce unnecessary energy loss and conform to the current development trend of energy conservation and environmental protection. In addition, the high heat generated by the continuous power supply of the coil is avoided. The traditional solenoid valve generates a large amount of heat when powered on for a long time, which not only easily burns the coil and shortens the service life of the solenoid valve, but also may cause thermal damage to surrounding components, increasing the risk of equipment failure; while the solenoid valve does not need to be continuously powered, which effectively reduces the heat generation, greatly improves the stability and reliability of the equipment, reduces the possibility of failure caused by overheating, and can maintain the working state stably for a long time. Moreover, this design also reduces the requirements for the heat dissipation system, reduces the overall cost and complexity of the equipment, and does not need to be equipped with a complex heat dissipation device to solve the problem of coil heating, making the installation and use of the solenoid valve more convenient, suitable for various application scenarios, especially for environments with limited space or high requirements for heat dissipation, which has important practical significance; at the same time, it also provides the possibility of developing more miniaturized and integrated equipment, further promoting technological progress and product innovation in related fields. It can be seen that the battery valve has the advantage of low power consumption.

[0057] In addition, the solenoid valve is also provided with a sealing ring 7 between the upper iron core 31 and the valve housing 1 and between the lower iron core 32 and the lower sealing plate 2, which can effectively prevent gas or liquid from leaking from the inside of the valve housing 1, ensure the sealing of the solenoid valve in application scenarios such as gas circuits or water circuits, and meet the use requirements of fields with high requirements for air tightness, such as gas appliances, etc. In addition, good sealing enables the solenoid valve to adapt to various complex working environments, and can maintain stable performance under conditions of high pressure, high temperature or corrosive media, which not only broadens the application range of the solenoid valve, allowing it to play a role in different industrial fields and special environments, but also improves the overall reliability and durability of the equipment. At the same time, good sealing performance reduces the possibility of external impurities entering the interior of the solenoid valve, reduces the risk of internal parts being damaged due to impurity contamination, thereby extending the service life of the solenoid valve and reducing maintenance costs. It can be seen that the battery valve also has the advantage of good sealing. In addition, it can withstand the high-pressure 1.6MPa sealing of the national standard GB 35844-2018 "Bottled Liquefied Petroleum Gas Pressure Regulator".

[0058] Moreover, the combined design of the upper coil 4, the magnet 5 and the guide sleeve 3, and the layout of the upper iron core 31 and the lower iron core 32 in the guide sleeve 3 make the overall structure of the solenoid valve compact and occupy a small space, which is conducive to installation in various space-limited devices. Moreover, in space-limited application scenarios, such as miniaturized smart devices, portable electronic products, and compact industrial control systems, the small size enables the solenoid valve to be easily installed and integrated without taking up too much space, providing greater flexibility for the overall layout and design of the device. At the same time, a smaller volume usually means a lighter weight, which is crucial for devices that need to be mobile or portable. It reduces the overall weight burden of the device, facilitates carrying and transportation, and improves the portability and convenience of use of the device; furthermore, a small-volume solenoid valve can use less material in the production process, which can effectively reduce the production cost. It can be seen that the battery valve also has the advantage of a small size. After calculation, the volume of the solenoid valve is only 1 / 3 of the common solenoid valves on the market, and the cost is 1 / 2 of the common solenoid valves on the market.

[0059] In summary, the solenoid valve of the present application can combine the airtightness advantages of the 6 inner valve cores with the small size and low power consumption advantages of the 6 outer valve cores to meet the needs of different application scenarios and promote the development of related industries and product upgrades.

[0060] It should be noted that a magnet 5 is also provided in the solenoid valve. When the solenoid valve is powered off, the magnetic force of the magnet 5 can help the valve core 6 and the transmission rod 61 to remain in a specific position. For example, when the solenoid valve is a normally closed solenoid valve, the magnetic force of the magnet 5 keeps the valve core 6 and the transmission rod 61 in a closed position when the power is off, and the gas or water path cannot flow; when the solenoid valve is a normally open solenoid valve, the magnetic force of the magnet 5 keeps the valve core 6 and the transmission rod 61 in an open position when the power is off, and the gas or water path can flow.

[0061] It should also be noted that in the present solenoid valve, the original closed state or manual state can be restored manually. The structure of the manual restoration component may specifically include a manual operation connecting rod 20 and a manual operation button 30. Fig.15 and Fig.16 Specifically, when the solenoid valve needs to be restored to its initial state, the manual operation link 20 connects the manual operation button 30 and the relevant mechanical structure inside the solenoid valve. When the manual operation button 30 is pressed, the external operating force is transmitted to the inside of the solenoid valve through the manual operation link 20. For example, the manual operation link 20 pushes or pulls the transmission rod 61 inside the solenoid valve to return it to its original closed state.

[0062] For example, for a normally closed solenoid valve, when the solenoid valve is in an open state and needs to be restored to a closed state, the manual operation button 30 is pulled down, and the manual operation connecting rod 20 pulls the transmission rod 61 downward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state. For another example, for a normally open solenoid valve, when the solenoid valve is in a closed state and needs to be restored to an open state, the manual operation button 30 is pressed, and the manual operation connecting rod 20 pushes the transmission rod 61 upward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state.

[0063] In practical applications, in addition to the above-mentioned manual restoration of the original closed state or manual state, an automatic reset structure can also be designed. For example, in some other embodiments, a spring 40 is specifically provided between the lower sealing plate 2 and the transmission rod 61, and the spring 40 is used for reset. Figure 5 .

[0064] It should also be noted that in addition to the above-mentioned solution of manually restoring the original closed state or manual state, and resetting by spring 40, the solenoid valve also has other different reset schemes. For example, in some other embodiments, a positive voltage or a reverse voltage can be applied to the upper coil 4 to realize the movement of the valve core 6 in different directions. This is electric reset.

[0065] For example, for a normally closed solenoid valve, when the upper coil 4 is connected to a positive voltage, the magnetic field generated will act on the valve core 6 inside the solenoid valve in an upward direction, thereby driving the valve core 6 to move upward, and it can be changed from a closed state to an open state; and when the upper coil 4 is connected to a reverse voltage, the direction of the magnetic field will change, thereby pushing the valve core 6 to move in the opposite direction, that is, to move downward, and achieve a reset from an open state to a closed state. For another example, for a normally open solenoid valve, when the upper coil 4 is connected to a reverse voltage, the magnetic field generated will act on the valve core 6 inside the solenoid valve in a downward direction, thereby driving the valve core 6 to move downward, and it can be changed from an open state to a closed state; and when the upper coil 4 is connected to a positive voltage, the direction of the magnetic field will change, thereby pushing the valve core 6 to move in the opposite direction, that is, to move upward, and achieve a reset from a closed state to an open state.

[0066] Specifically, the valve housing 1 includes a transverse top section 13 and vertical side sections 14 arranged at the bottom of both ends of the transverse top section 13. The transverse top section 13 and a pair of vertical side sections 14 surround and form an assembly space that is arranged through in a horizontal direction. In this regard, the assembly space formed by the transverse top section 13 and the vertical side sections 14 of the valve housing 1 provides installation positions for various components of the solenoid valve. During operation, the upper coil 4, the magnet 5, the guide sleeve 3, the upper iron core 31, the lower iron core 32, the valve core 6 and other components are placed in this assembly space.

[0067] Furthermore, the combination of the transverse top section 13 and the vertical side section 14 forms a stable frame structure that can effectively support and fix the various internal components. This structural design enables the solenoid valve to withstand certain external forces and vibrations during operation, maintain stable performance, and reduce the probability of failures caused by external interference. Furthermore, the through-set assembly space provides convenience for the installation of various components. During the assembly process, the staff can place the components into the assembly space in sequence from one direction for orderly assembly. This design simplifies the assembly process, improves production efficiency, and reduces assembly costs. More importantly, the through-set assembly space is conducive to air circulation and heat dissipation. During the operation of the solenoid valve, the heat generated can be dissipated through the air flow in the assembly space, reducing the internal temperature and avoiding overheating that affects the performance and life of the solenoid valve.

[0068] Specifically, a limit pad 33 is provided on the upper iron core 31 toward the bottom of the valve core 6. In this way, during the operation of the solenoid valve, when the valve core 6 moves in the vertical direction in the guide sleeve 3, the upper iron core 31 plays an important electromagnetic role. The limit pad 33 provided on the upper iron core 31 toward the bottom of the valve core 6 mainly plays a role when the valve core 6 moves to a specific position. For example, when the valve core 6 moves upward and approaches the upper iron core 31, the limit pad 33 can limit the further upward movement of the valve core 6, preventing the valve core 6 from excessively hitting the upper iron core 31 and causing damage. At the same time, in some cases, the limit pad 33 can also play a buffering role, reducing the impact force between the valve core 6 and the upper iron core 31, so that the movement of the valve core 6 is more stable.

[0069] It can be seen that the limit pad 33 can effectively protect the upper iron core 31 and the valve core 6 from damage caused by excessive impact. During the frequent switching of the solenoid valve, the movement speed and force of the valve core 6 may be relatively large. Without the protection of the limit pad 33, the valve core 6 may directly hit the upper iron core 31, causing deformation, damage to the upper iron core 31 or wear of the valve core 6, thereby affecting the performance and life of the solenoid valve. Therefore, the setting of the limit pad 33 can greatly reduce the risk of such damage. In addition, when the impact force between the valve core 6 and the upper iron core 31 is buffered, the limit pad 33 can reduce the noise and vibration generated during the operation of the solenoid valve, which is very important for some application scenarios with high requirements for noise and vibration, such as medical equipment, precision instruments and other application scenarios.

[0070] Specifically, the valve core 6, the upper iron core 31 and the lower iron core 32 are made of the same material. During the operation of the solenoid valve, when the upper coil 4 is energized to generate a magnetic field, since the valve core 6, the upper iron core 31 and the lower iron core 32 are made of the same material, their magnetic characteristics in the magnetic field are relatively consistent, and the magnetic field will produce similar electromagnetic forces on these components, making the movement of the valve core 6 in the guide sleeve 3 smoother. In addition, the same manufacturing materials ensure that the electromagnetic responses of the valve core 6, the upper iron core 31 and the lower iron core 32 in the magnetic field are highly consistent, which means that when the magnetic field changes, they will be affected in a similar way, so that the action of the solenoid valve is more stable and reliable, and it can maintain good performance whether in a fast switching state or in a long-term working process.

[0071] Specifically, the valve core 6, the upper iron core 31 and the lower iron core 32 can be made of 1215 steel. Since 1215 steel has good magnetic conductivity and can efficiently conduct magnetic fields, the valve core 6, the upper iron core 31 and the lower iron core 32 can respond quickly under the action of the magnetic field, thereby improving the speed and sensitivity of the electromagnetic valve. The magnetic field can be concentrated on these components, reducing energy loss and improving the utilization efficiency of the magnetic field.

[0072] It should also be noted that in the present solenoid valve, the original closed state or manual state can be restored manually. The structure of the manual restoration component may specifically include a manual operation connecting rod 20 and a manual operation button 30. Fig.15 and Fig.16 Specifically, when the solenoid valve needs to be restored to its initial state, the manual operation link 20 connects the manual operation button 30 and the relevant mechanical structure inside the solenoid valve. When the manual operation button 30 is pressed, the external operating force is transmitted to the inside of the solenoid valve through the manual operation link 20. For example, the manual operation link 20 pushes or pulls the transmission rod 61 inside the solenoid valve to return it to its original closed state.

[0073] For example, for a normally closed solenoid valve, when the solenoid valve is in an open state and needs to be restored to a closed state, the manual operation button 30 is pulled down, and the manual operation connecting rod 20 pulls the transmission rod 61 downward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state. For another example, for a normally open solenoid valve, when the solenoid valve is in a closed state and needs to be restored to an open state, the manual operation button 30 is pressed, and the manual operation connecting rod 20 pushes the transmission rod 61 upward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state.

[0074] In practical applications, in addition to the above-mentioned manual restoration of the original closed state or manual state, an automatic reset structure can also be designed. For example, in some other embodiments, a spring 40 is specifically provided between the lower sealing plate 2 and the transmission rod 61, and the spring 40 is used for reset. Figure 8 .

[0075] Example 2 Double-hold solenoid valve

[0076] The following combination Figure 6-Figure 8 The solenoid valve of the present application is described.

[0077] The solenoid valve of the second embodiment is improved on the basis of the first embodiment. On the basis of the first embodiment, the solenoid valve further specifically includes a lower coil 8, which is sleeved on the circumferential outer side of the guide sleeve 3, and the upper coil 4, the magnet 5 and the lower coil 8 are arranged in sequence from top to bottom in the vertical direction; the upper coil 4 is arranged in the upper cavity 11, and the lower coil 8 is arranged in the lower cavity 12.

[0078] Thus, when the state of the electromagnetic valve needs to be changed, the upper coil 4 and the lower coil 8 can be energized and controlled respectively. In the initial state, the upper coil 4, the magnet 5 and the lower coil 8 are arranged in sequence in the vertical direction, and the valve core 6 is at a specific position in the guide sleeve 3.

[0079] In order to better describe the inventive concept of the solenoid valve, the following is described in conjunction with the accompanying drawings, wherein Figure 7 The solenoid valve is in the closed state.

[0080] For example, when the solenoid valve needs to be changed from a closed state to an open state, a positive voltage is applied to the upper coil 4, and the upper coil 4 generates a magnetic field. At the same time, the electromagnetic action of the upper iron core 31 is cooperated to make the valve core 6 move upward in the guide sleeve 3 to switch to an open state. At this time, even if the current of the upper coil 4 is cut off and the magnetic field disappears, the open state can be maintained all the time without the need for continuous power supply. It should be noted that in this embodiment, in addition to the magnet 5 that can keep the valve core 6 and the transmission rod 61 in a specific position, if it is necessary to further maintain the open state, a positive voltage can also be applied to the lower coil 8, and the lower coil 8 can generate an upward force acting on the valve core 6 inside the solenoid valve, thereby stably maintaining the valve core 6 in the open state.

[0081] Furthermore, when it is necessary to restore the solenoid valve from an open state to a closed state, a reverse voltage can be applied to the lower coil 8, and the lower coil 8 generates a magnetic field, which generates a force acting on the valve core 6 inside the solenoid valve in a downward direction, and at the same time cooperates with the electromagnetic action of the lower iron core 32 to make the valve core 6 move downward in the guide sleeve 3 to switch to a closed state. At this time, even if the current of the lower coil 8 is cut off and the magnetic field disappears, the open state can still be maintained without the need for continuous power supply. It should be noted that in this embodiment, in addition to the magnet 5 being able to keep the valve core 6 and the transmission rod 61 in a specific position, if it is necessary to further maintain the closed state, a reverse voltage can also be applied to the upper coil 4, and the upper coil 4 can generate a force acting on the valve core 6 inside the solenoid valve in a downward direction, thereby stably maintaining the position of the valve core 6 in the closed state.

[0082] It should be noted that the above-mentioned switching of the open state or the closed state by energizing the upper coil 4 or the lower coil 8 is an electric reset. In the present application, in addition to the electric reset mentioned, manual reset can also be performed to meet the requirements of different use occasions and has a wider application.

[0083] The structure of the manual reset may specifically refer to the structure of the manual recovery component in the first embodiment, for example, it may specifically include a manual operation connecting rod 20 and a manual operation button 30. Specifically, when the solenoid valve is in a state where it needs to be restored to the initial state, the manual operation connecting rod 20 connects the manual operation button 30 and the relevant mechanical structure inside the solenoid valve. When the manual operation button 30 is pressed, the external operating force is transmitted to the inside of the solenoid valve through the manual operation connecting rod 20. For example, the manual operation connecting rod 20 will push or pull the transmission rod 61 inside the solenoid valve to return it to its original closed state.

[0084] For example, for a normally closed solenoid valve, when the solenoid valve is in an open state and needs to be restored to a closed state, the manual operation button 30 is pulled down, and the manual operation connecting rod 20 pulls the transmission rod 61 downward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state. For another example, for a normally open solenoid valve, when the solenoid valve is in a closed state and needs to be restored to an open state, the manual operation button 30 is pressed, and the manual operation connecting rod 20 pushes the transmission rod 61 upward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state.

[0085] It should also be noted that, in other embodiments, when the electromagnetic valve needs to be changed from a closed state to an open state, a forward voltage may be applied to the upper coil 4 and a forward voltage may be applied to the lower coil 8 at the same time, which will generate an upward force, causing the valve core 6 to move upward in the guide sleeve 3 to switch to an open state. Alternatively, when the electromagnetic valve needs to be restored from an open state to a closed state, a reverse voltage may be applied to the lower coil 8 and a reverse voltage may be applied to the upper coil 4 at the same time, which will generate a downward force, causing the valve core 6 to move downward in the guide sleeve 3 to switch to a closed state.

[0086] Example 3 Solenoid valve with feedback

[0087] The following combination Figure 9-14 The solenoid valve of the present application is described.

[0088] Since the solenoid valves currently on the market all have a single function, that is, normally open or normally closed, they change their working state to normally closed or normally open after being powered on, and they must be powered on all the time. In actual use, it is found that when these solenoid valves are installed in internal working scenes such as valve bodies and machines, it is impossible to judge whether the solenoid valve has been actuated or has been fully actuated. For example, if the solenoid valve is used in gas equipment, serious accidents may occur if it does not actuate. Based on this, the applicant has developed a solenoid valve with feedback, which can feedback a signal when the solenoid valve is fully actuated, allowing staff or users to easily identify whether the solenoid valve is "really" fully actuated. At the same time, its status can be remotely monitored to make various remote control commands to ensure functional and safe use.

[0089] The solenoid valve of the third embodiment is improved on the basis of the first embodiment. On the basis of the first embodiment, the solenoid valve further specifically includes a mounting bracket 9 and a magnetic sensor 10 arranged on the mounting bracket 9; the upper coil 4 is arranged in one of the upper cavity 11 and the lower cavity 12, and the mounting bracket 9 is detachably inserted in the other of the upper cavity 11 and the lower cavity 12; the solenoid valve also includes a prompt unit, which is communicatively connected with the magnetic sensor 10, and the magnetic sensor 10 is used to sense the change in magnetic force to determine whether the solenoid valve is in place; when the solenoid valve is in place, the magnetic sensor 10 feeds back a signal to the prompt unit, and the prompt unit gives a prompt.

[0090] In order to better understand the inventive concept of the solenoid valve, a normally open solenoid valve is now described.

[0091] The solenoid valve is in an open state, at which time the upper coil 4 is not energized, the valve core 6 is in a specific position, and the magnetic sensor 10 does not detect obvious magnetic changes. When the solenoid valve needs to be closed, the upper coil 4 is energized, and the upper coil 4 generates a magnetic field after being energized, causing the valve core 6 to move downward, and the solenoid valve changes from an open state to a closed state.

[0092] During the action of the valve core 6, the magnetic sensor 10 determines whether the solenoid valve is in place by sensing the change in the magnetic field. When the solenoid valve is in place, that is, the valve core 6 reaches the closed position completely, the change in the magnetic field reaches a specific value, and the specific value can be determined based on multiple actual tests. At this time, the magnetic sensor 10 can determine that the solenoid valve is in place based on the specific value reached by the magnetic field change, and feedback a signal to the prompt unit. The prompt unit and the magnetic sensor 10 are connected in communication, and a prompt is given after receiving the signal. The prompt can be in various forms, such as flashing lights, sound prompts, etc. If the solenoid valve is not in place, there is no feedback signal, and the prompt unit will not give a prompt.

[0093] It can be seen that the prompt unit can provide clear status indications for staff or users. In practical applications, especially in some complex systems, it is difficult to directly observe the internal action of the solenoid valve. By setting up the prompt unit, people can quickly understand whether the solenoid valve is in place, which improves the convenience and accuracy of operation. This is very important for work scenes that are difficult to directly observe inside valve bodies, machines, etc. In addition, for some application scenarios with high safety requirements, such as those involving gas, chemical and other fields, timely and accurate prompts can ensure the normal operation of the solenoid valve and avoid safety accidents caused by solenoid valve failures. The existence of the prompt unit greatly enhances the safety of the equipment.

[0094] Furthermore, the mounting bracket 9 is detachably inserted, which facilitates the installation and maintenance of the magnetic sensor 10; at the same time, this design also allows the prompt unit to be flexibly arranged according to actual needs, thereby improving the maintainability and adaptability of the entire system.

[0095] Specifically, the upper coil 4, the magnet 5 and the magnetic sensor 10 are arranged in sequence from top to bottom in the vertical direction. That is, the upper coil 4 is arranged in the upper cavity 11, and the mounting bracket 9 is arranged in the lower cavity 12. This design of sequential arrangement in the vertical direction makes the structure of the solenoid valve more compact, and the upper coil 4, the magnet 5 and the magnetic sensor 10 are reasonably arranged in a limited space, which reduces the overall volume of the solenoid valve and facilitates installation in various devices, especially in application scenarios with limited space.

[0096] Furthermore, if the solenoid valve needs to be maintained or upgraded, each component can be easily operated separately; for example, the upper coil 4 can be replaced, the position of the magnet 5 can be adjusted, or the magnetic sensor 10 can be upgraded without causing much impact on other components. This design improves the maintainability and scalability of the solenoid valve. In order to better understand the scalability of the solenoid valve, an example is given to illustrate.

[0097] Since the mounting fixing bracket 9 is detachably inserted, it is equivalent to a modular design. The difference between the single-holding type solenoid valve in Example 1 and the solenoid valve with feedback in Example 3 is that the solenoid valve with feedback in Example 3 has an additional feedback-related structure, while other structures are the same. Therefore, the installation and replacement of the two different solenoid valves, the single-holding type and the solenoid valve with feedback, can be achieved by simply pulling and disassembling, which is extremely convenient for later after-sales maintenance or product upgrades.

[0098] Specifically, the vertical side section 14 of the valve housing 1 has a card slot, and the mounting and fixing bracket 9 is provided with a card buckle. When the mounting and fixing bracket 9 is inserted into the valve housing 1, the card buckle is used to be snapped into the card slot. In this way, when it is necessary to install the mounting and fixing bracket 9 into the valve housing 1, the mounting and fixing bracket 9 is inserted into the valve housing 1. During the insertion process, the card buckle on the mounting and fixing bracket 9 gradually approaches the card slot of the vertical side section 14 of the valve housing 1. When the mounting and fixing bracket 9 is fully inserted into place, the card buckle will be snapped into the card slot to achieve the fixed installation of the mounting and fixing bracket 9 in the valve housing 1; when it is necessary to disassemble the mounting and fixing bracket 9, a certain external force can be applied to disengage the card buckle from the card slot, and then the mounting and fixing bracket 9 can be pulled out of the valve housing 1.

[0099] It can be seen that the design of the buckle and the slot makes the installation and removal of the mounting bracket 9 very convenient and quick, which can greatly improve work efficiency and save time and labor costs during the production, installation and maintenance process. In addition, if the magnetic sensor 10 fails or needs to be upgraded, the mounting bracket 9 can be easily removed through the connection method of the buckle and the slot for maintenance or replacement, which makes the maintenance and upgrade of the solenoid valve simpler and more convenient, and reduces maintenance costs. More importantly, the design of the buckle and the slot can be applied to mounting brackets 9 and valve housings 1 of different specifications and models, and has a certain degree of versatility, which allows standardized components to be used in the design and production process to improve production efficiency and reduce costs, such as the installation and replacement of two different solenoid valves, a single retention model and a feedback model.

[0100] Specifically, the mounting and fixing bracket 9 includes a bracket main section 91 and a pair of snap-on side sections 92 arranged on the bracket main section 91, the pair of snap-on side sections 92 are arranged on the same side of the bracket main section 91 and are arranged inwardly, so as to leave an abutting section 911 arranged outwardly at both ends of the bracket main section 91, and the respective clamping blocks 921 of the pair of snap-on side sections 92 are arranged back to back; the valve housing 1 has a pair of vertical side sections 14, each of which has recessed clamping grooves on both sides along the through direction of the assembly space, and the two clamping grooves are a first clamping groove 141 and a second clamping groove 142; when the mounting and fixing bracket 9 is inserted into the valve housing 1, the clamping block 921 of a snap-on side section 92 is clamped in the first clamping groove 141 of a vertical side section 14, and an abutting section 911 is clamped in the second clamping groove 142 of the same vertical side section 14.

[0101] When the mounting bracket 9 is ready to be inserted into the valve housing 1, the bracket main section 91 of the mounting bracket 9 is aligned with the assembly space of the valve housing 1; then, the mounting bracket 9 is pushed into the valve housing 1 along the through direction of the assembly space. During the insertion process, as the block 921 of one of the buckle side sections 92 on the mounting bracket 9 continues to be pushed in, the block 921 will eventually be engaged in the first slot 141. At the same time, the abutting section 911 on the same side of the buckle side section 92 will gradually approach the second slot 142 of the same vertical side section 14, and finally be engaged in the second slot 142. For the other buckle side section 92 and the corresponding vertical side section 14, the engagement of the block 921 with the first slot 141 and the engagement of the abutting section 911 with the second slot 142 are also achieved in the same way.

[0102] When the installation and fixing bracket 9 is fully inserted into the valve housing 1, the installation and fixing bracket 9 is fixed in the valve housing 1 by the engagement of the block 921 of the buckle side section 92 with the first slot 141 of the vertical side section 14, and the engagement of the abutment section 911 with the second slot 142; the engagement of the block 921 with the first slot 141 provides a fixing force in the horizontal direction to prevent the installation and fixing bracket 9 from moving.

[0103] It can be known that this structural design enables the mounting bracket 9 to be firmly installed in the valve housing 1. Through the double clamping of the clamping block 921 and the first clamping groove 141 and the abutting section 911 and the second clamping groove 142, a stable fixing force is provided to ensure that the mounting bracket 9 will not loosen or shift during the operation of the solenoid valve, thereby ensuring the normal operation of the magnetic sensor 10. In addition, the clamping structure can realize the precise positioning of the mounting bracket 9 in the valve housing 1. The clamping block 921 and the abutting section 911 of each buckle side section 92 are matched with the corresponding clamping groove, ensuring that the mounting bracket 9 can accurately reach the predetermined position when inserted into the valve housing 1, thereby improving the accuracy and consistency of the installation. At the same time, although the mounting bracket 9 can be firmly fixed in the valve housing 1, this clamping structure also makes installation and disassembly very convenient and quick. When the magnetic sensor 10 needs to be installed or replaced, it is only necessary to insert or pull out the mounting bracket 9 from the valve housing 1, without using complex tools or performing cumbersome operations, thereby improving work efficiency.

[0104] Specifically, the solenoid valve also includes a power supply unit, which is electrically connected to the magnetic sensor 10 and is used to power the magnetic sensor 10 with a 3V voltage. In this way, when the system is started or the magnetic sensor 10 is required to work, the power supply unit outputs a stable 3V voltage, and this 3V voltage provides the required electrical energy for the circuit elements inside the magnetic sensor 10, so that it can operate normally. At the same time, a 3V low voltage, that is, two dry batteries can be used to supply the electromagnetic force sensor 10 without connecting to a 220V mains supply, which has broad application prospects for the intelligent control of portable mobile products or outdoor products. In addition, the 3V voltage provides a relatively stable working power supply for the magnetic sensor 10. At this voltage, the internal circuit of the magnetic sensor 10 can operate in a relatively stable state, reducing the measurement error and instability caused by voltage fluctuations, ensuring that the magnetic sensor 10 can accurately detect changes in the magnetic field and provide reliable data for the state feedback of the solenoid valve.

[0105] It should also be noted that in the present solenoid valve, the original closed state or manual state can be restored manually. The structure of the manual restoration component may specifically include a manual operation connecting rod 20 and a manual operation button 30. Fig.15 and Fig.16 Specifically, when the solenoid valve needs to be restored to its initial state, the manual operation link 20 connects the manual operation button 30 and the relevant mechanical structure inside the solenoid valve. When the manual operation button 30 is pressed, the external operating force is transmitted to the inside of the solenoid valve through the manual operation link 20. For example, the manual operation link 20 pushes or pulls the transmission rod 61 inside the solenoid valve to return it to its original closed state.

[0106] For example, for a normally closed solenoid valve, when the solenoid valve is in an open state and needs to be restored to a closed state, the manual operation button 30 is pulled down, and the manual operation connecting rod 20 pulls the transmission rod 61 downward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state. For another example, for a normally open solenoid valve, when the solenoid valve is in a closed state and needs to be restored to an open state, the manual operation button 30 is pressed, and the manual operation connecting rod 20 pushes the transmission rod 61 upward to restore the solenoid valve to a closed state, thereby realizing the function of manually restoring the closed state.

[0107] In practical applications, in addition to the above-mentioned manual restoration of the original closed state or manual state, an automatic reset structure can also be designed. For example, in some other embodiments, a spring 40 is specifically provided between the lower sealing plate 2 and the transmission rod 61, and the spring 40 is used for reset. Fig.12 .

[0108] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A solenoid valve, characterized in that: The valve housing (1) comprises a valve housing (1) and a lower sealing plate (2) mounted on the bottom of the valve housing (1); a guide sleeve (3), an upper coil (4) and a magnet (5) are arranged in the valve housing (1); the upper coil (4) and the magnet (5) are sleeved on the circumferential outer side of the guide sleeve (3); the magnet (5) divides the assembly space of the valve housing (1) into an upper cavity (11) and a lower cavity (12) arranged in a vertical direction; the upper coil (4) is arranged in one of the upper cavity (11) and the lower cavity (12); An upper iron core (31) and a lower iron core (32) are fixed in the guide sleeve (3), and the upper iron core (31) and the lower iron core (32) are arranged vertically up and down. A valve core (6) that moves in the vertical direction is arranged in the guide sleeve (3), and the valve core (6) is provided with a transmission rod (61); the lower iron core (32) passes through the lower sealing plate (2) and extends to the outside, and the transmission rod (61) passes through the lower iron core (32) and extends to the outside; A sealing ring (7) is provided between the upper iron core (31) and the valve housing (1), and between the lower iron core (32) and the lower sealing plate (2).

2. A solenoid valve according to claim 1, characterized in that: The valve housing (1) comprises a transverse top section (13) and vertical side sections (14) arranged at the bottom of both ends of the transverse top section (13); the transverse top section (13) and a pair of vertical side sections (14) surround and form an assembly space that is arranged through in a horizontal direction.

3. The solenoid valve according to claim 1, characterized in that: A limiting pad (33) is provided on the bottom of the upper iron core (31) facing the valve core (6).

4. A solenoid valve according to any one of claims 1 to 3, characterized in that: It also includes a lower coil (8), wherein the lower coil (8) is sleeved on the circumferential outer side of the guide sleeve (3), and the upper coil (4), the magnet (5) and the lower coil (8) are arranged in sequence from top to bottom in the vertical direction; The upper coil (4) is arranged in the upper cavity (11), and the lower coil (8) is arranged in the lower cavity (12).

5. A solenoid valve according to any one of claims 1 to 3, characterized in that: It also includes a mounting and fixing bracket (9) and a magnetic sensor (10) arranged on the mounting and fixing bracket (9); The upper coil (4) is arranged in one of the upper cavity (11) and the lower cavity (12), and the mounting and fixing bracket (9) is detachably inserted in the other of the upper cavity (11) and the lower cavity (12); The solenoid valve further comprises a prompting unit, the prompting unit being in communication connection with a magnetic sensor (10), the magnetic sensor (10) being used to sense magnetic force changes to determine whether the solenoid valve has been fully actuated; when the solenoid valve has been fully actuated, the magnetic sensor (10) feeds back a signal to the prompting unit, and the prompting unit performs a prompt.

6. A solenoid valve according to claim 5, characterized in that: The upper coil (4), the magnet (5) and the magnetic sensor (10) are arranged in sequence from top to bottom in the vertical direction; the upper coil (4) is arranged in the upper cavity (11), and the mounting and fixing bracket (9) is arranged in the lower cavity (12).

7. The solenoid valve according to claim 5, characterized in that: The vertical side section (14) of the valve housing (1) has a slot, and the mounting and fixing bracket (9) is provided with a buckle. When the mounting and fixing bracket (9) is inserted into the valve housing (1), the buckle is used to be snapped into the slot.

8. The solenoid valve according to claim 7, characterized in that: The mounting and fixing bracket (9) comprises a bracket main body section (91) and a pair of buckle side sections (92) arranged on the bracket main body section (91); A pair of snap side sections (92) are arranged on the same side of the bracket main section (91) and are arranged inwardly, so as to leave abutment sections (911) arranged outwardly at both ends of the bracket main section (91); The respective clamping blocks (921) of a pair of the buckle side segments (92) are arranged opposite to each other; The valve housing (1) has a pair of vertical side sections (14), each of the vertical side sections (14) having recessed slots on both sides along the through direction of the assembly space, the two slots being a first slot (141) and a second slot (142); When the mounting and fixing bracket (9) is inserted into the valve housing (1), a clamping block (921) of a clamping side section (92) is clamped into a first clamping groove (141) of a vertical side section (14), and abutting section (911) is clamped into a second clamping groove (142) of the same vertical side section (14).

9. The solenoid valve according to claim 5, characterized in that: It also comprises a power supply unit, which is electrically connected to the magnetic sensor (10) and is used to supply power to the magnetic sensor (10) using a 3V voltage.

10. A solenoid valve according to any one of claims 1 to 3, characterized in that: The valve core (6), the upper iron core (31) and the lower iron core (32) are made of the same material.

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