TWM609514U - Mother-child valve type gas solenoid valve - Google Patents

Abstract

This creation is a mother-child valve type gas solenoid valve, which mainly uses the magnetic structure between the main valve plug group and the auxiliary valve plug group to form a linkage relationship between the mother valve and the child valve, so that the auxiliary valve plug group is in the main valve. The plug group can be reliably linked with it when it is working, and in case the main valve plug group is not completely closed, the auxiliary valve plug group can still be used to close the gas leading to the downstream to improve safety. Among them, the main valve plug group includes a moving iron core that can be magnetized by the solenoid coil group and away from the main valve hole, and a main valve stem and a main valve plug fixed at the tail end of the moving iron core. A movable iron core is arranged on the main valve stem. A holding small iron core that can be attached to the moving iron core in a planar magnetic attraction, and the bottom surface of the holding small iron core is movably sleeved with a pair of valve stems and auxiliary valve plugs, so as to pass through the complete magnetic absorption surface of the top of the holding small iron core To greatly improve the effect of maintaining the linkage between the small iron core and the moving iron core to attract magnetism, and to ensure that the auxiliary valve plug group is maintained in the set valve opening state.

Description

Mother-child valve type gas solenoid valve

This creation relates to a mother-and-child valve type gas solenoid valve related to combustion appliances, especially a design that allows the main and auxiliary valve plug groups to form a planar magnetic linkage relationship between the mother valve and the child valve, which is more reliable The magnetic attraction attachment effect ensures that the auxiliary valve plug group is maintained at the set valve opening and closing state.

Generally, when the main solenoid valve is opened for gas water heaters to open the gas supply pipeline, in order to further meet the need to adjust the fire power during the operation of the gas water heater, a matching water volume or gas supply pipeline can be installed downstream of the gas supply pipeline. The proportional valve that adjusts the degree of gas supply by water temperature changes, so that the gas supply pipeline of the integrated gas water heater can be formed by the solenoid valve at the upstream of the pipeline to control whether the upstream gas inlet of the pipeline is open or not. The proportional valve forms an adjustment mechanism at the downstream of the pipeline to control the opening of the downstream gas outlet.

With safety requirements, the design of gas valves has been continuously improved. The creator has developed a variety of proportional valves installed at the gas outlet downstream of the pipeline to also be affected by the main solenoid valve at the upstream gas inlet. Control the valve opening or closing. On the one hand, when the gas water heater is started, you only need to supply power to the main solenoid valve at the upstream gas inlet to open the solenoid valve and the proportional valve at the same time, so as to control the gas inlet and gas in sequence. The purpose of whether the outlet is open or not, on the other hand, when the main solenoid valve is closed, the proportional valve is also automatically closed accordingly, which can achieve the effect of double closing valve to improve safety.

The design similar to the above-mentioned main solenoid valve is usually a solenoid coil that drives a main valve plug group and a secondary valve plug group to move, and when the main and auxiliary valve plug groups reach the set valve opening state, they pass through the main and auxiliary valves. The magnetic attraction between the plug groups keeps the auxiliary valve plug group in the set valve opening state.

For example, the CN 110486527 A patent document controls whether the first main gas main flow passage connected to the gas inlet is opened or not by the main sealing rubber plug in a first control valve (that is, equivalent to the main valve plug in the main valve plug group). The pilot valve rubber plug (that is equivalent to the auxiliary valve plug in the auxiliary valve plug group) controls whether the pilot flow passage connected to a second control valve is open or not, and the second control valve opens or closes the valve to further control the connection of gas Whether the outlet of the second gas main flow channel is open or not.

Among them, the main movable valve stem connected to the main sealing rubber plug in the first control valve is covered at the tail end of a main movable valve core, and the pilot valve stem connected to the pilot valve rubber plug is slidably arranged inside the main movable valve stem The pilot movable spool is connected. When the main movable spool is energized by the solenoid coil, the movable valve stem and the main sealing rubber plug are driven by the main movable spool to move in the valve opening direction. As for the pilot valve stem, the movable valve stem opens After the valve direction moves for a set distance, the pilot movable valve core and the pilot valve rubber plug move toward the valve opening direction, and the pilot movable valve core and the main movable valve core are magnetically attached to each other (that is, the main and auxiliary valve plug groups). The magnetic attraction between the two) keeps the pilot valve stem and the pilot valve rubber plug (ie, the auxiliary valve plug group) in the set valve opening state.

The main movable valve stem used to house the pilot movable spool in the prior art structure is covered at the end of the main movable spool. The outer diameter of the main movable valve stem must be smaller than the outer diameter of the main movable spool, plus The main movable valve stem must have an outer wall thickness sufficient to cover the periphery of the pilot movable valve core, so that the outer diameter of the pilot movable valve core is extremely different from the outer diameter of the main movable valve core.

In addition, the above-mentioned pilot valve stem is capable of forming a linkage relationship between the pilot movable spool and the pilot valve rubber plug. It is from the end of the pilot movable spool and the main movable spool that passes through the pilot movable spool and the pilot. If the valve plug is connected, the end of the pilot movable spool and the main movable spool must be provided with a recessed hole that hides the head end of the pilot valve stem to prevent the head end of the pilot valve stem from affecting the pilot movable spool and the main movement The fitting effect of the spool.

Because the outer diameter of the pilot movable spool and the outer diameter of the main movable spool is very obvious, and the bonding surface of the pilot movable spool and the main movable spool is provided with recessed holes, it can only be used in The ring-shaped bonding surface formed on the periphery of the concave hole is magnetically attached to the main movable spool, which will make the magnetic attachment of the pilot movable spool and the main movable spool far less than expected, as long as a little vibration or external force collision The pilot movable spool will be separated from the main movable spool, and the proportional valve at the downstream gas outlet cannot be kept open during the use of the combustion appliance, not to mention the need to adjust the opening in accordance with the firepower.

In view of this, the author has accumulated many years of research and practical experience in related fields, and specially created a mother-and-child valve gas solenoid valve with a reliable magnetic attachment effect between the main and auxiliary valve plug groups. It is a positive and reliable means to maintain the normal operation of combustion appliances, and to produce a more stable and reliable fire control effect.

The purpose of this creation is to provide a mother-and-child valve gas solenoid valve with a reliable magnetic attachment effect between the main and auxiliary valve plug groups. When the main and auxiliary valve plug groups are opened, the auxiliary valve plug groups can be opened. Maintain the valve open state steadily, maintain the normal operation of the combustion appliance with a relatively more active and reliable means, and thereby produce a more stable and reliable firepower adjustment effect.

In order to achieve the above purpose, this creation is a parent-child valve type gas solenoid valve set in the gas supply pipeline of the control burning appliance, including a main valve plug group and a main valve hole that control whether the gas inlet upstream of the pipeline is open or not. A secondary valve plug group and secondary valve hole that control whether the gas outlet downstream of the pipeline is open or not, and a solenoid coil group that controls the action of the main valve plug group; among them:

The main valve plug group includes a moving iron core that receives the magnetic flux of the solenoid coil group and moves away from the main valve hole, a main valve stem fixed at the tail end of the moving iron core, and a main valve set at the tail end of the main valve stem Plug, and a main valve plug spring that constantly pushes the main valve plug toward the main valve hole, the top of the main valve stem is provided with a sliding chamber with a fixed distance from the bottom surface of the moving iron core, the The bottom of the sliding chamber is provided with a through hole that penetrates to the inner circumference of the main valve hole, and a small holding iron core is movably arranged in the sliding chamber, and the top surface of the holding small iron core is a bottom surface of the moving iron core after being magnetically fused A magnetic attraction surface attached in a planar magnetic attraction, and the bottom surface of the holding small iron core is provided with a socket hole communicating with the through hole;

The auxiliary valve plug assembly includes an auxiliary valve rod slidably penetrated through the sleeve hole and slidably connected to the holding small iron core. The tail end of the auxiliary valve rod passes through the through hole and is provided with an auxiliary valve plug. The auxiliary valve The plug always receives the push of a secondary valve plug spring to close the secondary valve hole. When the movable iron core receives the magnetic movement of the solenoid coil assembly, the main valve plug stem and the main valve plug are synchronized away from the main valve hole to open. During valve operation, the magnetic attraction surface of the top surface of the holding small iron core is attached to the bottom surface of the movable iron core in a planar magnetic attraction manner, so that the auxiliary valve plug group can be stably maintained in a synchronized valve opening state.

The following further describes the implementation of each element:

In implementation, the outer diameter of the top of the main valve stem is larger than the tail end of the moving iron core, and it is fixed on the tail end of the moving iron core from the outside to the inside relative to the upper position of the sliding chamber, so that the inside of the sliding chamber is kept The area of the magnetic attraction surface of the small iron core is approximately equal to the area of the tail end of the moving iron core to increase the magnetic attraction between the two.

During implementation, the end of the auxiliary valve rod extending into the socket hole is provided with a necked section, and a plug ring fixed at the socket hole is movably sleeved at the necked section.

During implementation, the sliding chamber of the main valve stem is provided with a miniature spring that constantly pushes the holding small iron core toward the moving iron core. The elastic force of the miniature spring is smaller than that of the auxiliary valve plug spring to pass the miniature spring. The spring assists the holding small iron core to magnetically attract the moving iron core.

In implementation, the electromagnetic coil set includes a sleeve and an electromagnetic coil wound around the sleeve, the movable iron core is movably arranged in the sleeve, and the sleeve is fixedly arranged at an end away from the movable iron core There is a fixed iron core. After the electromagnetic coil is energized, the moving iron core can be moved toward the fixed iron core by magnetic flux through the fixed iron core.

In implementation, the auxiliary valve hole is connected to a proportional main valve whose gas outlet downstream of the control pipeline is closed or opened. The proportional main valve is controlled to open or close the valve by the gas pressure provided by the auxiliary valve hole. A pressure relief valve hole is bypassed in the section connecting the proportional main valve to connect to the downstream gas outlet. The pressure relief valve hole is provided with a valve that can be pushed against and moved by the auxiliary valve plug group when the auxiliary valve plug group closes the valve. The ejector pin and the pressure relief valve plug far away from the pressure relief valve hole are additionally provided with a pressure relief valve plug spring to constantly push the ejector pin and the pressure relief valve plug toward the pressure relief valve hole.

During implementation, the auxiliary valve hole is further connected to a proportional regulating valve that controls the opening of the proportional main valve in the section connecting the proportional main valve. The proportional regulating valve includes a proportional regulating valve hole connected with the auxiliary valve hole, and a proportional regulating valve. Proportional regulating valve plug, a drive assembly that drives the proportional regulating valve plug to move away from or close to the proportional regulating valve hole.

In implementation, the drive assembly includes a motor, a gear set connected to the motor and the proportional regulating valve plug, and a clutch mechanism is used between the gear set and the motor to push the proportional regulating valve plug against the proportional regulating valve. When the valve hole is disconnected from the transmission coupling, the motor is set to stop running when it does not receive the rotation signal of the gear set.

During implementation, the motor is further electrically connected with a pressure sensor that detects the downstream gas outlet pressure.

In implementation, the drive assembly includes a central guide rod connected with the proportional adjustment valve plug, and a proportional adjustment solenoid coil that drives the central guide rod to move in a set direction.

Compared with the prior art, this creation is connected to the auxiliary valve stem through the socket hole at the bottom of the holding small iron core, so that the top of the holding small iron core has a complete magnetic absorption surface, and the top of the main valve stem is covered and fixed. The design on the periphery of the moving iron core maximizes the sectional area of the small holding iron core set in the sliding chamber of the main valve stem, and improves the magnetic attraction and attachment effect between the holding small iron core and the moving iron core. When the coil assembly drives the main and auxiliary valve plug groups away from the main and auxiliary valve holes in sequence, it can ensure that the auxiliary valve plug group is maintained in the set valve opening state, and the combustion appliance can be maintained by a relatively more active and reliable means. Normal operation, and to produce a more stable and reliable firepower adjustment effect.

The following is based on the technical means of this creation, enumerating the implementation methods suitable for this creation, and the description with the diagrams is as follows:

As shown in the first to third figures, this creation is a mother-child valve type gas solenoid valve 100, which is set in the pipeline that controls the gas supply of the combustion appliance, including a control whether the upstream gas inlet of the pipeline is open or not The main valve plug group 10 and the main valve hole 20, the auxiliary valve plug group 30 and the auxiliary valve hole 40 that control whether the gas outlet downstream of the pipeline is open or not, and an electromagnetic coil that controls the action of the main and auxiliary valve plug groups 10, 30 Group 50; among them:

The main valve plug assembly 10 includes a movable iron core 11 that receives the magnetic flux of the solenoid coil assembly 50 and is away from the main valve hole 20, a main valve stem 12 that is sheathed and fixed on the tail end of the movable iron core 11, and a main valve rod 12 is arranged at the end of the movable iron core 11 The main valve plug 13 at the tail end of the main valve stem 12 and a main valve plug spring 14 that constantly push the main valve plug 13 toward the main valve hole 20.

As shown in the figure, the solenoid coil assembly 50 includes a sleeve 51 and an electromagnetic coil 52 wound around the sleeve 51. A fixed iron core 53 is fixed at one end of the sleeve 51. The main valve plug assembly 10 The moving iron core 11 is movably arranged in the sleeve 51, and the inside of the sleeve 51 forms a moving stroke that allows the moving iron core 11 to move away from or close to the fixed iron core 53.

The top of the main valve rod 12 is provided with a sliding chamber 121 with a fixed distance from the bottom surface of the moving iron core 11, and a sliding chamber 121 is movably provided in the sliding chamber 121 that can be energized with the moving iron core 11 after being magnetized. The core 11 is magnetically attached to the holding small iron core 15. The bottom of the sliding chamber 121 is provided with a through hole 122 penetrating the inner circumference of the main valve hole 20. The top surface of the holding small iron core 15 is a magnet that can communicate with the magnetic flux. The bottom surface of the movable iron core 11 is a magnetic attraction surface 151 that is magnetically attracted and attached, and the bottom surface of the holding small iron core 15 is provided with a socket hole 152 communicating with the through hole 122.

In implementation, the outer diameter of the top of the main valve stem 12 is larger than the tail end of the moving iron core 11, and it is covered and fixed on the tail end of the moving iron core 11 from the outside in the position relative to the upper position of the sliding chamber 121, so that the sliding The area of the magnetic attraction surface 151 holding the small iron core 15 inside the chamber 121 and the tail end of the moving iron core 11 are approximately the same to increase the magnetic attraction between the two.

As shown in the figure, the movable iron core 11 is provided with a groove 111 on the outer periphery of one end covered by the main valve stem 12, and the main valve stem 12 is processed to form an insert at its end covered by the movable iron core 11 The inner flange 123 of the groove 111 extends the tail end of the movable iron core 11 into the sliding chamber 121 of the main valve rod 12, and then the outer wall surface of the sliding chamber 121 is connected with the outer wall surface of the sliding chamber 121 through a rolling process. The overlapping part of the groove 111 is rolled into the direction of the groove 111, so that the main valve stem 12 can be firmly covered on the end of the movable iron core 11, and the sliding chamber 121 of the main valve stem 12 is formed One allows the small holding iron core 15 to move away from or close to the moving stroke of the moving iron core 11.

As for the auxiliary valve plug assembly 30, it includes an auxiliary valve rod 31 slidably passing through the socket hole 152 and slidably connected to the holding small iron core 15. The tail end of the auxiliary valve rod 31 passes through the through hole 122 and is arranged There is a secondary valve plug 32, and the secondary valve plug 32 constantly receives the abutment of a secondary valve plug spring 33 to close the secondary valve hole 40.

In implementation, one end of the sub-valve stem 31 extending into the socket hole 151 is provided with a necked section 311, and a plug ring 34 fixed at the socket hole 152 is movably sleeved at the necked section 311. With the stopper ring 34 movably sleeved on the necked section 311, the movable iron core 11 can be magnetized by the electromagnetic coil assembly 50 together with the main valve stem 12 and keep the small iron core 15 moving away from the main valve hole When 20 has not reached the set stroke, first let the stopper ring 34 slide between the necked sections 311 until the stopper ring 34 reaches the end of the necked section 311 away from the auxiliary valve plug 32, and then starts to drive the auxiliary valve The rod 31 and the auxiliary valve plug 32 move away from the auxiliary valve hole 40 (as shown in the fourth figure), thereby generating the control effect of allowing the main and auxiliary plug groups 10 and 30 to open in sequence.

In particular, when the moving iron core 11 receives the magnetic movement of the solenoid coil assembly 50 to move the main valve plug rod 12 and the main valve plug 13 synchronously away from the main valve hole 20 to open the valve, the top surface of the holding small iron core 15 The magnetic attraction surface 151 and the bottom surface of the movable iron core 11 are magnetically attracted and attached in a planar shape, thereby enabling the auxiliary valve plug group 30 to be stably maintained in a synchronized valve opening state. It is even possible to maximize the cross-sectional area of the sliding chamber 121 of the main valve rod 12 and the holding small iron core 15 provided in the sliding chamber 121 through the design of covering and fixing the main valve rod 12 on the periphery of the moving iron core 11, And let the magnetic field lines between the holding small iron core 15 and the moving iron core 11 avoid unnecessary areas or non-magnetic objects, and improve the magnetic attraction between the holding small iron core 15 and the moving iron core 11 effect.

Utilizing the above-mentioned structural design, when the solenoid coil assembly 50 drives the main and auxiliary valve plug assemblies 10, 30 to move away from the main and auxiliary valve holes 20, 40 in order, it will not be subjected to slight vibration or external force. Let the movable iron core 11 in the main and auxiliary valve plug groups 10 and 30 separate from the small holding iron core 15 to ensure that the auxiliary valve plug group 30 is maintained in the set valve opening state, and the combustion is maintained by relatively more active and reliable means. The appliance operates normally, and thereby produces a more stable and reliable firepower adjustment effect.

When the mother-child valve type gas solenoid valve 100 of this creation is implemented, a micro spring that constantly pushes the holding small iron core 15 toward the moving iron core 11 can be further provided in the sliding chamber 121 of the main valve stem 12 16. The elastic force of the micro spring 16 is relatively smaller than that of the auxiliary valve plug spring 33, so that when the auxiliary valve plug 31 moves away from the auxiliary valve hole 40, the force of the micro spring 16 will hold the small iron The core 15 abuts toward the moving iron core 11 to enhance the adhesion effect of the small holding iron core 15 and the moving iron core 11.

In addition, in the process of sealing the valves of the main and auxiliary valve plug groups 10 and 30, if the main valve plug group 10 cannot be reliably sealed due to the jamming of components or the influence of foreign matter, the auxiliary valve plug group 30 can still be used Under the elastic force of the auxiliary valve plug spring 33, as shown in the fifth figure, the auxiliary valve plug 31 is surely kept in contact with the auxiliary valve hole 40, which seals the gas to the downstream and improves the safety of the use of the combustion appliance.

As shown in the first figure, when this creation is used, the auxiliary valve hole 40 can be connected to a proportional main valve 200 with a closed or open gas outlet downstream of the control pipeline. The proportional main valve 200 is provided by the auxiliary valve hole 40. The gas pressure controls the opening or closing of the valve, and the opening or closing of the proportional main valve 200 is controlled by the auxiliary valve plug group 30 and the auxiliary valve hole 40 to indirectly control whether the downstream gas outlet is open or not.

In this embodiment, the auxiliary valve hole 40 bypasses a pressure relief valve hole 61 in the section connected to the proportional main valve 200 to connect to the downstream gas outlet. The pressure relief valve hole 61 is provided with a plug on the auxiliary valve plug. When the group 30 seals the valve, it can be pushed by the auxiliary valve plug group 30 and move away from the ejector pin of the pressure relief valve hole 61 and the pressure relief valve plug 62. A pressure relief valve plug spring 63 is also provided to constantly release the ejector pin and pressure. The valve plug 62 abuts toward the pressure relief valve hole 61.

In the figure, the proportional main valve 200 is provided with a proportional main valve plug 201 capable of closing or opening the downstream gas outlet and a proportional main valve diaphragm 202 linked with the proportional main valve plug 201. The proportional main valve diaphragm 202 A back pressure chamber 301 is formed on the back in the direction opposite to the valve sealing direction of the proportional main valve plug 201. The auxiliary valve hole 40 and the back pressure chamber 301 are connected by a back pressure passage 302, and the pressure relief valve hole 61 is connected to the back pressure chamber. The bypass type of the pressure passage 302 is connected to the downstream gas outlet.

When the combustion appliance is started and the solenoid coil assembly 50 is energized, the main valve plug assembly 10 first opens. As shown in Figure 6, gas enters the position of the proportional main valve 200 from the main valve hole 20 Then when the auxiliary valve plug group 30 opens, the back pressure channel 302 allows gas to enter the back pressure chamber 301 to open the proportional main valve plug 201, so that the gas can enter the combustion appliance smoothly and maintain the normal combustion appliance. Operation.

When the combustion appliance stops operating and the solenoid coil assembly 50 is demagnetized, as shown in the first figure, the main and auxiliary valve plug groups 10, 30 are sealed under the action of the main and auxiliary valve plug springs 14, 33, respectively. The ejector pin and the pressure relief valve plug 62 are pushed by the auxiliary valve plug assembly 30 and move away from the pressure relief valve hole 61, so that the excess gas in the back pressure chamber 301 and the back pressure passage 302 is discharged from the pressure relief valve hole 61. The pressure valve hole 61 is discharged, so that the proportional main valve plug 200 returns to the closed valve state before the combustion appliance is not started, and the gas is surely shut off.

In implementation, the aforementioned secondary valve plug spring 33 may be a conical spring whose outer diameter gradually decreases toward the secondary valve plug 40, so that the secondary valve stem 31 and the secondary valve plug 32 acted on by it can produce a better coaxial guiding effect. , It helps the auxiliary valve plug 32 and the auxiliary valve hole 40 to be tightly closed; similarly, the pressure relief valve plug spring 63 can also be a conical spring whose outer diameter gradually shrinks toward the ejector pin and the pressure relief valve plug 62. It helps the ejector pin and the pressure relief valve plug 62 to tightly fit the pressure relief valve hole 61.

When used in this creation, the auxiliary valve hole 40 can be further connected to a proportional regulating valve 400 that controls the opening of the proportional main valve 200 in the section where the auxiliary valve hole 40 is connected to the proportional main valve 200. The proportional regulating valve 400 includes a connection with the auxiliary valve hole. 40 connected to the proportional regulating valve hole 401, a proportional regulating valve plug 402, and a drive assembly that drives the proportional regulating valve plug 402 to move away from or close to the proportional regulating valve hole 401 (such as the motor 404 and the gear set 405 in the figure) .

In implementation, the back pressure passage 302 is also bypassed by a partial pressure passage 303 connected to the proportional regulating valve hole 401, and another proportional regulating valve diaphragm 403 is blocked above the proportional regulating valve hole 403 to form a partial pressure chamber 304. The partial pressure chamber 304 is provided with a partial pressure hole 305 connected to the downstream gas outlet, and the proportional regulating valve plug 402 is arranged in the proportional regulating valve in a form that can be driven by the drive assembly to move away from or close to the proportional regulating valve hole 401膜片403上。 Diaphragm 403.

The way that the proportional regulating valve plug 402 is moved away from or approaching the proportional regulating valve hole 401 through the drive assembly changes the proportion of gas from the back pressure passage 302 into the partial pressure passage 303 and the proportional regulating valve hole 401, thereby reducing Or increase the gas back pressure of the back pressure chamber 301 to move the proportional main valve plug 201 toward the valve closing or valve opening direction to adjust the firepower of the combustion appliance.

In the embodiment shown in the first and seventh figures, the drive assembly includes a motor 404, a gear set 405 that is drivingly connected to the motor 404 and the proportional adjustment valve plug 402, the gear set 405 and the motor 404 When the proportional regulating valve plug 402 abuts against the proportional regulating valve hole 401, the transmission coupling is disconnected through a clutch mechanism. The motor 404 is set to stop running when it does not receive the rotation signal of the gear set 405 to avoid causing the motor 404 Overrun.

The motor 404 can even be further electrically connected to a pressure sensor 406 that detects the downstream gas outlet pressure, and the feedback signal from the pressure sensor 406 controls the motor 404 to stop when it runs to a set position, and does not require continuous power supply. Keep the burning appliance at the set firepower under the state.

The aforementioned driving assembly for driving the proportional regulating valve plug 402 to move away from or close to the proportional regulating valve hole 401 can also include a center connected to the proportional regulating valve plug 402 as shown in Figures 8 and 9 The structure of the guide rod 407, a proportional adjustment solenoid 408 that drives the central guide rod 407 to move in a set direction, can also achieve the action effect of driving the proportional adjustment valve plug 402 to move away from or close to the proportional adjustment valve hole 401 .

In summary, this creation is connected to the auxiliary valve stem through the socket hole at the bottom of the holding small iron core, so that the top of the holding small iron core can have a complete magnetic absorption surface, and the main valve stem can be covered and fixed in motion. The periphery of the iron core can maximize the cross-sectional area of the sliding chamber of the main valve stem and the small holding iron core provided in the sliding chamber, and improve the magnetic attraction and adhesion effect between the holding small iron core and the moving iron core. When the coil assembly drives the main and auxiliary valve plug groups away from the main and auxiliary valve holes in sequence, it can ensure that the auxiliary valve plug group is maintained in the set valve opening state, and the combustion appliance can be maintained by a relatively more active and reliable means. Normal operation, and to produce a more stable and reliable firepower adjustment effect.

The above descriptions and drawings of the embodiments only illustrate the preferred embodiments of this creation, and are not intended to limit the scope of this creation. Anything similar or similar to the purpose, structure, device, feature, etc. of this creation should belong to The patent scope of this creation.

100: Mother-child valve type gas solenoid valve 10: Main valve plug group 11: Moving iron core 111: Groove 12: Main valve stem 121: Sliding Room 122: Through hole 123: inner flange 13: Main valve plug 14: Main valve plug spring 15: Keep a small iron core 151: magnetic surface 152: socket hole 16: micro spring 20: Main valve hole 30: Secondary valve plug group 31: Secondary valve stem 311: Necking section 32: Secondary valve plug 33: Secondary valve plug spring 34: plug ring 40: auxiliary valve hole 50: Electromagnetic coil group 51: sleeve 52: Electromagnetic coil 53: fixed core 61: Pressure relief valve hole 62: thimble and pressure relief valve plug 63: Pressure relief valve plug spring 200: Proportional main valve 201: Proportional main valve plug 202: Proportional main valve diaphragm 301: Back Pressure Chamber 302: Back pressure channel 303: partial pressure channel 304: partial pressure chamber 305: Partial pressure hole 400: Proportional control valve 401: Proportional control valve hole 402: Proportional regulating valve plug 403: proportional control valve diaphragm 404: Motor 405: Gear Set 406: Pressure sensor 407: Center guide rod 408: Proportional adjustment solenoid

The first picture: the schematic diagram of the configuration of the mother-child valve type gas solenoid valve in this creation. Figure 2: A schematic diagram of the closed state structure of the mother-child valve type gas solenoid valve in this creation. Figure 3: The schematic diagram of the main and auxiliary valve plug assemblies in this creation. Figure 4: The structure diagram of the open state of the mother and child valve gas solenoid valve in this creation. Figure 5: In this creation, when the main valve plug group cannot completely seal the valve, the auxiliary valve plug group can still seal the valve. Figure 6: The action diagram of the proportional main valve in the open state of the mother-child valve gas solenoid valve in this creation. Figure 7: Schematic diagram of the closed valve state of the proportional control valve disclosed in this creation. Figure 8: The configuration diagram of the mother-child valve gas solenoid valve used in the second implementation of this creation. Figure 9: A schematic diagram of the configuration of the mother-child valve type gas solenoid valve used in the second implementation of this creation.

100: Mother-child valve type gas solenoid valve

10: Main valve plug group

11: Moving iron core

111: Groove

12: Main valve stem

121: Sliding Room

122: Through hole

123: inner flange

13: Main valve plug

14: Main valve plug spring

15: Keep a small iron core

151: magnetic surface

152: socket hole

16: micro spring

20: Main valve hole

30: Secondary valve plug group

31: Secondary valve stem

311: Necking section

32: Secondary valve plug

33: Secondary valve plug spring

34: plug ring

40: auxiliary valve hole

50: Electromagnetic coil group

51: sleeve

52: Electromagnetic coil

53: fixed core

61: Pressure relief valve hole

62: thimble and pressure relief valve plug

63: Pressure relief valve plug spring

302: Back pressure channel

Claims (10)

A mother-child valve type gas solenoid valve is arranged in a pipeline for controlling the supply of gas to a combustion appliance, and includes a main valve plug group and a main valve for controlling whether the upstream gas inlet of the pipeline is open or not Hole, an auxiliary valve plug group and auxiliary valve hole that control whether the gas outlet downstream of the pipeline is open or not, and an electromagnetic coil group that controls the action of the main and auxiliary valve plug groups; among them: The main valve plug group includes a moving iron core that receives the magnetic flux of the solenoid coil group and moves away from the main valve hole, a main valve stem fixed at the tail end of the moving iron core, and a main valve set at the tail end of the main valve stem Plug, and a main valve plug spring that constantly pushes the main valve plug toward the main valve hole, the top of the main valve stem is provided with a sliding chamber with a fixed distance from the bottom surface of the moving iron core, the The bottom of the sliding chamber is provided with a through hole that penetrates to the inner circumference of the main valve hole, and a small holding iron core is movably arranged in the sliding chamber, and the top surface of the holding small iron core is a bottom surface of the moving iron core after being magnetically fused A magnetic attraction surface attached in a planar magnetic attraction, and the bottom surface of the holding small iron core is provided with a socket hole communicating with the through hole; The auxiliary valve plug assembly includes an auxiliary valve rod slidably penetrated through the sleeve hole and slidably connected to the holding small iron core. The tail end of the auxiliary valve rod passes through the through hole and is provided with an auxiliary valve plug. The auxiliary valve The plug always receives the push of a secondary valve plug spring to close the secondary valve hole. When the movable iron core receives the magnetic movement of the solenoid coil assembly, the main valve plug stem and the main valve plug are synchronized away from the main valve hole to open. During valve operation, the magnetic attraction surface of the top surface of the holding small iron core is attached to the bottom surface of the movable iron core in a planar magnetic attraction manner, so that the auxiliary valve plug group can be stably maintained in a synchronized valve opening state. The mother-child valve gas solenoid valve according to claim 1, wherein the outer diameter of the top of the main valve stem is larger than the tail end of the moving iron core, and the upper part of the sliding chamber is covered and fixed from the outside to the inside. The tail end of the moving iron core makes the area of the magnetic attraction surface holding the small iron core inside the sliding chamber approximately equal to the area of the tail end of the moving iron core, so as to increase the magnetic attraction force between the two. The mother-child valve type gas solenoid valve of claim 1, wherein the end of the auxiliary valve stem that extends into the socket hole is provided with a necked section, and a movably sleeve is fixed on the necked section at the necked section. The plug ring at the socket hole. The mother-child valve type gas solenoid valve according to claim 1, wherein the sliding chamber of the main valve stem is provided with a miniature spring that constantly pushes the holding small iron core toward the moving iron core. The elastic force is relatively smaller than the elastic force of the auxiliary valve plug spring, so that the miniature spring assists the holding small iron core to be magnetically attracted to the moving iron core. The mother-child valve type gas solenoid valve according to claim 1, wherein the solenoid coil group includes a sleeve and an electromagnetic coil arranged around the sleeve, and the movable iron core is movably arranged in the sleeve, And the sleeve is fixedly provided with a fixed iron core at one end far away from the moving iron core, and the electromagnetic coil can be magnetized through the fixed iron core to move the moving iron core toward the fixed iron core after being energized. The mother-child valve type gas solenoid valve according to any one of claims 1 to 5, wherein the auxiliary valve hole is connected to a proportional main valve whose gas outlet downstream of the control line is closed or opened, and the proportional main valve The valve is opened or closed by the gas pressure provided by the auxiliary valve hole. The auxiliary valve hole bypasses a pressure relief valve hole in the section connected to the proportional main valve to connect to the downstream gas outlet. The pressure relief valve hole is provided with There is a thimble and pressure relief valve plug that can be pushed by the auxiliary valve plug assembly to move away from the pressure relief valve hole when the auxiliary valve plug assembly seals the valve, and a pressure relief valve plug spring is provided to constantly release the thimble needle and the relief valve plug. The pressure valve plug pushes against the pressure relief valve hole. The mother-child valve type gas solenoid valve according to claim 6, wherein the auxiliary valve hole is further connected to a proportional regulating valve for controlling the opening of the proportional main valve in the section connecting the proportional main valve, and the proportional regulating valve includes A proportional regulating valve hole connected with the auxiliary valve hole, a proportional regulating valve plug, and a driving assembly that drives the proportional regulating valve plug to move away from or close to the proportional regulating valve hole. The mother-child valve type gas solenoid valve according to claim 7, wherein the drive assembly includes a motor, a gear set connected to the motor and the proportional regulating valve plug, and a gear set is connected to the motor. The clutch mechanism is disengaged from the transmission coupling when the proportional regulating valve plug abuts against the proportional regulating valve hole, and the motor is set to stop running when the gear set rotation signal is not received. The mother-child valve type gas solenoid valve according to claim 8, wherein the motor is further electrically connected with a pressure sensor that detects the downstream gas outlet pressure. The mother-child valve gas solenoid valve according to claim 7, wherein the drive assembly includes a center guide rod connected with the proportional adjustment valve plug, and a proportional adjustment solenoid coil that drives the center guide rod to move in a set direction.

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