CN214093061U - Master-slave valve type gas electromagnetic valve - Google Patents

Abstract

The utility model relates to a mother and son valve formula gas solenoid valve mainly utilizes the magnetic attraction structure between main stopcock group and the vice stopcock group and forms the interlock relation of a mother valve and sub-valve, makes the interlock that vice stopcock group can really with when main stopcock group work to in case seal incomplete time at main stopcock group, still can rely on vice stopcock group to lead to the gas in low reaches and seal, improve the security. The main valve plug group comprises a movable iron core which can be electrified by the electromagnetic coil group and is far away from the main valve hole, a main valve rod and a main valve plug which are fixed at the tail end of the movable iron core, a small holding iron core which can be attached to the movable iron core in a surface-shaped magnetic absorption manner is movably arranged on the main valve rod, and a secondary valve rod and a secondary valve plug are movably sleeved on the bottom surface of the small holding iron core, so that the linkage magnetic absorption attachment effect between the small holding iron core and the movable iron core is greatly improved through a complete magnetic absorption surface at the top of the small holding iron core, and the secondary valve plug group is ensured to be maintained in a set open state.

Description

Master-slave valve type gas electromagnetic valve

Technical Field

The utility model relates to a master and slave valve formula gas solenoid valve that is relevant with combustion apparatus especially indicates that design between main, vice valve plug group forms the face-like magnetism of a master valve and sub-valve and inhales the interlock relation, has the attached effect of comparatively reliable magnetism of inhaling, ensures that vice valve plug group maintains and is setting for the open valve and the closed valve state.

Background

When the main electromagnetic valve is opened to open the pipeline for supplying gas, a proportional valve for adjusting the gas supply degree according to the water quantity or water temperature change is arranged at the downstream of the pipeline for supplying gas, so that the pipeline for supplying gas of the whole gas water heater can form a switch mechanism for controlling the opening of the upstream gas inlet of the pipeline at the upstream of the pipeline by the electromagnetic valve, and an adjusting mechanism for controlling the opening of the downstream gas outlet is formed at the downstream of the pipeline by the proportional valve.

Along with the requirement on safety, the gas valve is also continuous in the design to advance, the utility model discloses the designer has once developed the multiple proportional valve that lets set up in pipeline low reaches gas outlet department also can receive the main solenoid valve control of upper reaches gas inlet department and open the valve or seal the valve, when gas heater starts on the one hand, only need to let solenoid valve and proportional valve open the valve simultaneously to the main solenoid valve power supply of upper reaches gas inlet department, reach according to the preface control gas inlet and gas outlet open the purpose whether, on the other hand when main solenoid valve is closed, the proportional valve is automatic closing thereupon also, can reach the efficiency of double-close valve in order to improve the security.

The main valve plug set and the sub valve plug set are normally driven to move by a solenoid coil, and when the main valve plug set and the sub valve plug set reach the set valve-opening state, the sub valve plug set is kept in the set valve-opening state through the magnetic attraction between the main valve plug set and the sub valve plug set.

For example, in the CN110486527A patent document, a main sealing plug (i.e., equivalent to a main plug in a main plug group) in a first control valve controls whether a first main gas flow channel connected to a gas inlet is opened or not, a pilot valve plug (i.e., equivalent to an auxiliary plug in an auxiliary plug group) controls whether a pilot flow channel connected to a second control valve is opened or not, and a second control valve opens or seals the valve to further control whether a second main gas flow channel connected to a gas outlet is opened or not.

The main movable valve rod connected with the main sealing rubber plug in the first control valve is coated at the tail end of a main movable valve core, the pilot valve rod connected with the pilot valve rubber plug is connected with a pilot movable valve core arranged in the main movable valve rod in a sliding mode, when the main movable valve core is electrified by an electromagnetic coil, the movable valve rod and the main sealing rubber plug are driven by the main movable valve core to move towards a valve opening direction, and after the pilot valve rod moves towards the valve opening direction for a set distance, the pilot valve rod is drawn by the pilot movable valve core and moves towards the valve opening direction together with the pilot valve rubber plug, and the pilot valve rod and the pilot valve rubber plug (namely an auxiliary valve plug group) are mutually attracted and attached in a magnetic mode (namely magnetic attraction between the main valve plug group and the auxiliary valve plug group) to keep the pilot valve rod and the pilot valve plug (namely the auxiliary valve plug group) in a set valve opening state.

In the above-mentioned structure, the main movable valve rod for accommodating the pilot movable valve core is coated on the tail end of the main movable valve core, the outer diameter of the main movable valve rod is necessarily smaller than the outer diameter of the main movable valve core, and the main movable valve rod must have a thickness enough to coat the outer wall of the periphery of the pilot movable valve core, so that the outer diameter of the pilot movable valve core and the outer diameter of the main movable valve core have an extremely obvious difference.

In addition, the pilot valve rod can form the linkage relation between the pilot movable valve core and the pilot valve rubber plug, one end of the pilot movable valve core, which is adsorbed to the main movable valve core, penetrates through the pilot movable valve core and is connected with the pilot valve rubber plug, and one end of the pilot movable valve core, which is adsorbed to the main movable valve core, is provided with a concave hole for hiding the head end of the pilot valve rod, so that the head end of the pilot valve rod is prevented from influencing the attaching effect of the pilot movable valve core and the main movable valve core.

Because the outer diameter of the pilot movable valve core is quite different from the outer diameter of the main movable valve core, and the binding surface of the pilot movable valve core and the main movable valve core is provided with the concave hole, the magnetic absorption binding effect of the pilot movable valve core and the main movable valve core is far inferior to the expected magnetic absorption binding effect, the pilot movable valve core can be separated from the main movable valve core only by slight vibration or external force collision, and the proportional valve at the downstream gas outlet cannot be kept open in the use process of the combustion appliance, and the opening degree needs to be adjusted by matching with the firepower.

In view of this, the present invention provides a master-slave valve type gas solenoid valve that can reliably attract magnetic materials between the main and auxiliary valve plug sets, so as to maintain the normal operation of the burner by relatively more positive and reliable means and to generate more stable and reliable fire adjusting effect.

SUMMERY OF THE UTILITY MODEL

The object of the utility model is to provide a let have reliably between main, vice plug group inhale the attached effect of magnetism mother and son valve formula gas solenoid valve promptly, when main, vice plug group open the valve after, can let vice plug group stably keep opening the valve state to the means that is relatively more positive, reliable maintains the normal function of gas appliance, and with produce more stable, true firepower regulating effect.

In order to achieve the above object, the present invention provides a master-slave valve type gas solenoid valve disposed in a gas supply pipeline of a control burner, comprising a main valve plug set and a main valve hole for controlling whether a gas inlet at the upstream of the pipeline is opened or not, an auxiliary valve plug set and an auxiliary valve hole for controlling whether a gas outlet at the downstream of the pipeline is opened or not, and an electromagnetic coil set for controlling the operation of the main valve plug set; wherein:

the main valve plug group comprises a movable iron core which receives the magnetism of the electromagnetic coil group and moves away from the main valve hole, a main valve rod fixed at the tail end of the movable iron core, a main valve plug arranged at the tail end of the main valve rod and a main valve plug spring which constantly pushes the main valve plug to the main valve hole for sealing, the top of the main valve rod is provided with a sliding chamber with a fixed distance with the bottom surface of the movable iron core, the bottom of the sliding chamber is provided with a through hole penetrating to the inner periphery of the main valve hole, a small holding iron core is movably arranged in the sliding chamber, the top surface of the small holding iron core is a magnetic absorption surface which can be attached to the bottom surface of the movable iron core after the magnetism is introduced, and the bottom surface of the small holding iron core is provided with a sleeving hole communicated with the through hole;

the auxiliary valve plug group comprises an auxiliary valve rod which penetrates through the sleeve hole in a sliding mode and is connected with the small iron core in a sliding mode, the tail end of the auxiliary valve rod penetrates through the through hole and is provided with an auxiliary valve plug, the auxiliary valve plug is constantly propped by a spring of the auxiliary valve plug to seal the auxiliary valve hole, when the movable iron core receives the magnetic movement of the electromagnetic coil group to enable the main valve plug rod and the main valve plug to be away from the main valve hole synchronously and to be opened, the surface-shaped magnetic absorption attachment is formed by the magnetic absorption surface on the top surface of the small iron core and the bottom surface of the movable iron core, and then the auxiliary valve plug group can be stably maintained in a synchronous opening state.

Specific embodiments of the various elements are further described below:

when the sliding chamber is used, the outer diameter of the top of the main valve rod is larger than the tail end of the movable iron core, and the main valve rod is fixed at the tail end of the movable iron core in a wrapping mode from outside to inside relative to the position above the sliding chamber, so that the area of the magnetic attraction surface of the small iron core inside the sliding chamber is approximately equal to the area of the tail end of the movable iron core, and the magnetic attraction force between the magnetic attraction surface and the tail end of the movable iron core is improved.

When the valve is in use, one end of the auxiliary valve rod extending into the sleeve hole is provided with a necking section, and the necking section is movably sleeved with a plug ring fixed at the sleeve hole.

When the valve is operated, a miniature spring which constantly pushes the small keeping iron core against the moving iron core is arranged in the sliding chamber of the main valve rod, and the elasticity of the miniature spring is smaller than that of the auxiliary valve plug spring so as to assist the small keeping iron core to be magnetically attracted to the moving iron core through the miniature spring.

When the electromagnetic coil group is implemented, the electromagnetic coil group comprises a sleeve and an electromagnetic coil wound on the periphery of the sleeve, the movable iron core is movably arranged in the sleeve, a fixed iron core is fixedly arranged at one end, away from the movable iron core, of the sleeve, and the electromagnetic coil can be electrified to enable the movable iron core to move towards the fixed iron core.

When the proportional main valve is used, the auxiliary valve hole is connected to a proportional main valve for controlling the downstream gas outlet to be closed or opened, the proportional main valve is controlled to open or close by the gas pressure provided by the auxiliary valve hole, the section of the auxiliary valve hole connected with the proportional main valve is connected with the downstream gas outlet by a pressure relief valve hole, the pressure relief valve hole is provided with a thimble and a pressure relief valve plug which can be pushed by the auxiliary valve plug group to move away from the pressure relief valve hole when the auxiliary valve plug group seals the valve, and a pressure relief valve plug spring is arranged to constantly push the thimble and the pressure relief valve plug towards the direction of the pressure relief valve hole.

In practice, the sub-valve hole is further connected with a proportional regulating valve for controlling the opening degree of the proportional main valve in a section connected with the proportional main valve, and the proportional regulating valve comprises a proportional regulating valve hole connected with the sub-valve hole, a proportional regulating valve plug and a driving component for driving the proportional regulating valve plug to move away from or close to the proportional regulating valve hole.

When the driving assembly is used, the driving assembly comprises a motor and a gear set which is in transmission connection with the motor and the proportional regulating valve plug, the gear set is separated from the motor through a clutch mechanism when the proportional regulating valve plug is abutted against the proportional regulating valve hole, and the motor stops running when a gear set rotation signal is not received.

In practice, the motor is further electrically connected to a pressure sensor that senses the pressure at the downstream gas outlet.

In practice, the driving assembly includes a center guide rod connected to the proportional control valve plug, and a proportional control solenoid coil for driving the center guide rod to move in a predetermined direction.

Compared with the prior art, the utility model discloses a this cup joint the hole and be connected with this pair valve rod that keep little iron core bottom, can let keep little iron core top to have the complete face of inhaling magnetism, and utilize main valve rod top cladding cover to be in solid moving iron core outlying design, let the setting at the little iron core sectional area maximize of keeping of the sliding chamber of main valve rod, promote should keep little iron core and should move the attached effect of inhaling magnetism between the iron core, it drives this owner to lead to magnetism at this solenoid group, this owner is kept away from according to the preface to vice valve plug group, when vice valve hole, can ensure this vice valve plug group and maintain the open valve state of setting for, it is more positive relatively, reliable means maintains the combustor normal operating, and in order to produce more stable, real firepower regulating effect.

The following technical means according to the present invention are listed as the embodiments suitable for the present invention, and are described with reference to the drawings as follows:

drawings

Fig. 1 is a schematic view of the configuration of the master-slave valve type gas solenoid valve of the present invention.

Fig. 2 is a schematic view of the valve-sealing state structure of the master-slave valve type gas solenoid valve of the present invention.

Fig. 3 is a schematic structural view of the main and auxiliary valve plug sets of the present invention.

Fig. 4 is a schematic structural view of the open state of the master-slave valve type gas solenoid valve of the present invention.

Fig. 5 is a schematic diagram of the state that the auxiliary valve plug set can still reliably seal the valve when the main valve plug set of the present invention cannot completely seal the valve.

Fig. 6 is a schematic diagram of the operation of the proportional main valve when the master-slave valve type gas solenoid valve of the present invention is in the open state.

Fig. 7 is a schematic view of the valve-sealing state of the proportional regulating valve disclosed in the present invention.

Fig. 8 is an external view structural view of a second embodiment of the present invention showing the use and arrangement of the master-slave valve type gas solenoid valve.

Fig. 9 is a schematic view of the configuration of a master-slave valve type gas solenoid valve according to a second embodiment of the present invention.

Description of reference numerals: 100 mother-child valve type gas electromagnetic valves; 10 main valve plug group; 11 a movable iron core; 111 grooves; 12 a main valve stem; 121 a sliding chamber; 122 through holes; 123 inner flange; 13, a main valve plug; 14 a main valve plug spring; 15 holding the small iron core; 151 magnetic attracting surfaces; 152 a socket hole; 16 micro-springs; 20 main valve bore; 30 pairs of valve plug groups; 31 subsidiary valve stems; 311 a necked down section; 32 sub valve plugs; 33 secondary valve plug springs; 34 a plug ring; 40 auxiliary valve holes; 50 electromagnetic coil groups; 51 a sleeve; 52 an electromagnetic coil; 53 fixing the iron core; 61 relief valve openings; 62 a thimble and a pressure relief valve plug; 63 a pressure relief valve plug spring; a 200-ratio main valve; 201 proportion main valve plug; 202 proportion main valve diaphragm; 301 back pressure chamber; 302 a back pressure channel; 303 a partial pressure channel; 304 a pressure-dividing chamber; 305 partial pressure holes; a 400 proportion regulating valve; 401 proportional regulating valve orifice; 402 proportional control valve plug; 403 proportional control valve diaphragm; 404 a motor; 405 a gear set; 406 a pressure sensor; 407 a central guide bar; 408 proportional solenoid.

Detailed Description

As shown in fig. 1 to 3, the present invention relates to a primary and secondary valve type gas solenoid valve 100, which is installed in a pipeline for controlling the supply of gas to a combustion device, and comprises a primary valve plug set 10 and a primary valve hole 20 for controlling whether the upstream gas inlet of the pipeline is opened or not, a secondary valve plug set 30 and a secondary valve hole 40 for controlling whether the downstream gas outlet of the pipeline is opened or not, and an electromagnetic coil set 50 for controlling the operation of the primary and secondary valve plug sets 10, 30; wherein:

the main valve plug assembly 10 includes a plunger 11 receiving the magnetic field from the solenoid assembly 50 and far away from the main valve hole 20, a main valve stem 12 covering and fixed to the end of the plunger 11, a main valve plug 13 disposed at the end of the main valve stem 12, and a main valve plug spring 14 for constantly urging the main valve plug 13 toward the main valve hole 20.

In the illustration, the electromagnetic coil set 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 movable iron core 11 of the main valve plug set 10 is movably disposed in the sleeve 51, and a moving stroke for moving the movable iron core 11 away from or close to the fixed iron core 53 is formed inside the sleeve 51.

The top of the main valve rod 12 is provided with a sliding chamber 121 having a fixed distance with the bottom surface of the movable iron core 11, a small holding iron core 15 movably arranged in the sliding chamber 121 and capable of attracting the movable iron core 11 after the movable iron core 11 is magnetized, the bottom of the sliding chamber 121 is provided with a through hole 122 penetrating to the inner periphery of the main valve hole 20, the top surface of the small holding iron core 15 is a magnetic attracting surface 151 capable of attracting the movable iron core 11 after the movable iron core is magnetized in a planar manner, and the bottom surface of the small holding iron core 15 is provided with a sleeve hole 152 communicated with the through hole 122.

In practice, the outer diameter of the top of the main valve stem 12 is larger than the tail end of the plunger 11, and the main valve stem is fixed to the tail end of the plunger 11 in a covering manner from the outside to the inside at a position above the sliding chamber 121, so that the magnetic attraction surface 151 for holding the small plunger 15 inside the sliding chamber 121 is substantially equal to the area of the tail end of the plunger 11, thereby increasing the magnetic attraction force therebetween.

In the figure, the outer periphery of one end of the movable iron core 11, which is wrapped by the main valve rod 12, is provided with a slot 111, the end of the main valve rod 12, which is wrapped by the main valve rod 11, is processed to form an inner flange 123 embedded in the slot 111, the inner flange 123 extends the tail end of the movable iron core 11 into the sliding chamber 121 of the main valve rod 12, and then the overlapping portion of the outer wall surface of the sliding chamber 121 and the slot 111 is rolled towards the direction of the slot 111 by a rolling process, so that the main valve rod 12 is stably wrapped at the tail end of the movable iron core 11, and a moving stroke for keeping the small iron core 15 moving away from or close to the movable iron core 11 is formed inside the sliding chamber 121 of the main valve rod 12.

The sub-valve plug assembly 30 includes a sub-valve stem 31 slidably disposed through the sleeve hole 152 and slidably connected to the small holding iron core 15, the tail end of the sub-valve stem 31 passes through the through hole 122 and is provided with a sub-valve plug 32, and the sub-valve plug 32 is constantly pressed by a sub-valve plug spring 33 to close the sub-valve hole 40.

In practice, a necking section 311 is disposed at one end of the sub-valve rod 31 extending into the sleeve hole 151, and a plug ring 34 fixed at the sleeve hole 152 is movably sleeved at the necking section 311. By virtue of the movable sleeve of the plug ring 34 in the necked-down section 311, when the plunger 11 is energized by the solenoid group 50, together with the main valve rod 12, and the small iron core 15 is kept moving away from the main valve hole 20, and does not reach a set stroke, the plug ring 34 is firstly slid between the necked-down sections 311 until the plug ring 34 reaches the end of the necked-down section 311 away from the auxiliary valve plug 32, and the auxiliary valve rod 31 and the auxiliary valve plug 32 are driven to move away from the auxiliary valve hole 40 (as shown in fig. 4), thereby generating a control effect of sequentially opening the main plug group 10 and the auxiliary plug group 30.

In particular, when the main valve plug 12 and the main valve plug 13 are opened by the solenoid group 50 moving magnetically, the auxiliary valve plug group 30 can be stably maintained in a synchronous opening state by the magnetic attraction surface 151 on the top surface of the holding small core 15 and the bottom surface of the movable core 11 adhering magnetically. Even through the design of fixedly covering the main valve stem 12 on the periphery of the movable iron core 11, the sectional areas of the sliding chamber 121 of the main valve stem 12 and the small holding iron core 15 disposed in the sliding chamber 121 are maximized, and the magnetic force lines between the small holding iron core 15 and the movable iron core 11 are avoided from unnecessary areas or non-magnetic objects, so as to improve the magnetic attraction and adhesion effect between the small holding iron core 15 and the movable iron core 11.

Utilize above-mentioned structural design, the utility model discloses when this owner is driven to the logical magnetism of this solenoid group 50, vice plug group 10, 30 keeps away from this owner according to the preface, vice valve hole 20, 40, be unlikely to receive little vibrations or exogenic action and let the main, moving iron core 11 in the middle of vice plug group 10, 30 break away from with keeping little iron core 15 promptly, ensure that this vice plug group 30 maintains the open valve state of settlement, it is normal function to maintain the combustion apparatus with more positive, reliable means relatively, and with produce more stable, real firepower regulation effect.

The utility model discloses a when mother and son valve formula gas solenoid valve 100 implements, can further be equipped with a constant and will keep the miniature spring 16 that little iron core 15 pushed up towards this movable iron core 11 direction in the sliding chamber 121 of this main valve pole 12, this miniature spring 16's elasticity is less than this vice valve plug spring 33's elasticity relatively, make under this vice valve plug 31 removes the state of keeping away from this vice valve opening 40, will keep little iron core 15 to push up towards this movable iron core 11 direction by this miniature spring 16's effort, strengthen this and keep little iron core 15 and this movable iron core 11 attached effect.

In addition, in the process of sealing the main and auxiliary valve plug sets 10, 30, in case the main valve plug set 10 cannot reliably seal the valve due to the element jamming or the influence of foreign matters, the auxiliary valve plug set 30 can still ensure the auxiliary valve plug 31 to be adhered to the auxiliary valve hole 40 by the elastic force of the auxiliary valve plug spring 33, as shown in fig. 5, to seal the gas flowing to the downstream, thereby improving the safety of the burner in use

As shown in fig. 1, in the present invention, the auxiliary valve hole 40 can be connected to a proportional main valve 200 for controlling the downstream gas outlet to be closed or opened, the proportional main valve 200 is controlled to open or close by the gas pressure provided by the auxiliary valve hole 40, and the downstream gas outlet is indirectly controlled to open or close by controlling the open or close of the proportional main valve 200 through the auxiliary valve plug set 30 and the auxiliary valve hole 40.

In this embodiment, the sub-valve hole 40 bypasses a relief valve hole 61 to connect with the downstream gas outlet at the section connected with the proportional main valve 200, a thimble and a relief valve plug 62 are disposed at the relief valve hole 61 and can be pushed by the sub-valve plug 30 to move away from the relief valve hole 61 when the sub-valve plug 30 seals the valve, and a relief valve plug spring 63 is disposed to constantly push the thimble and the relief valve plug 62 toward the 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 a downstream gas outlet and a proportional main valve diaphragm 202 linked with the proportional main valve plug 201, a back part of the proportional main valve diaphragm 202 forms a back pressure chamber 301 in a direction opposite to the direction of closing the proportional main valve plug 201, the auxiliary valve hole 40 is communicated with the back pressure chamber 301 through a back pressure channel 302, and the pressure relief valve hole 61 is connected with the downstream gas outlet in a bypass mode with the back pressure channel 302.

When the gas burner is started and the solenoid set 50 is energized, the main valve plug set 10 is first opened, as shown in fig. 6, the gas enters the position of the proportional main valve 200 from the main valve hole 20, and then when the sub valve plug set 30 is opened, the gas enters the back pressure chamber 301 from the back pressure channel 302 to open the proportional main valve plug 201, so that the gas can smoothly enter the gas burner, and the normal operation of the gas burner is maintained.

When the combustion device stops operating and the electromagnetic coil set 50 is demagnetized, as shown in fig. 1, the main and auxiliary valve plug sets 10, 30 are respectively sealed under the action of the main and auxiliary valve plug springs 14, 33, the thimble and the pressure relief valve plug 62 are pushed by the auxiliary valve plug set 30 to move away from the pressure relief valve hole 61, so that the excessive gas in the backpressure chamber 301 and the backpressure channel 302 is discharged from the pressure relief valve hole 61, and the proportional main valve plug 200 recovers the valve sealing state before the combustion device is started, thereby reliably closing the gas.

In practice, the sub-valve plug spring 33 may be a conical spring with an outer diameter gradually decreasing toward the sub-valve plug 40, so that the sub-valve stem 31 and the sub-valve plug 32 under the action of the conical spring generate a better coaxial guiding effect, which is helpful for the sub-valve plug 32 to seal with the sub-valve hole 40; similarly, the relief plug spring 63 may be a conical spring with an outer diameter gradually decreasing toward the pin and the relief plug 62, so as to facilitate the pin and the relief plug 62 to be tightly fitted to the relief valve hole 61.

The utility model discloses during the use, this sub-valve hole 40 can further connect a proportional control valve 400 of controlling this proportional main valve 200 aperture in the district section of connecting this proportional main valve 200, and this proportional control valve 400 includes a proportional control valve hole 401, a proportional control valve plug 402 that is connected with this sub-valve hole 40, drives this proportional control valve plug 402 and removes the drive assembly (motor 404 and gear train 405 as in the drawing) of keeping away from or being close to this proportional control valve hole 401.

In practice, the back pressure channel 302 bypasses a pressure dividing channel 303 connected to the proportional regulating valve hole 401, a proportional regulating valve diaphragm 403 is blocked above the proportional regulating valve hole 403 to form a pressure dividing chamber 304, the pressure dividing chamber 304 is provided with a pressure dividing hole 305 connected to a downstream gas outlet, and the proportional regulating valve plug 402 is disposed on the proportional regulating valve diaphragm 403 in a manner that the proportional regulating valve plug can be driven by the driving assembly to move away from or close to the proportional regulating valve hole 401.

The driving assembly drives the proportional control valve plug 402 to move away from or close to the proportional control valve hole 401, so as to change the proportion of the fuel gas entering the partial pressure channel 303 and the proportional control valve hole 401 from the back pressure channel 302, further reduce or increase the fuel gas back pressure of the back pressure chamber 301, and enable the proportional main valve plug 201 to move towards the valve closing or opening direction, thereby adjusting the fire power of the combustion appliance.

In the embodiment shown in fig. 1 and 7, the driving assembly includes a motor 404, a gear set 405 drivingly coupled to the motor 404 and the proportional regulating valve plug 402, the gear set 405 is drivingly coupled to the motor 404 via a clutch mechanism when the proportional regulating valve plug 402 abuts against the proportional regulating valve hole 401, and the motor 404 is set to stop operating when the gear set 405 rotation signal is not received, thereby preventing the motor 404 from over-operating.

The motor 404 may be further electrically connected to a pressure sensor 406 for detecting the pressure of the downstream gas outlet, and the signal fed back from the pressure sensor 406 controls the motor 404 to stop operating when the motor is operated to a predetermined position, so as to maintain the burner at a predetermined level of heating power without the need of continuous power supply.

The 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 be represented by a structural configuration including a central guide rod 407 connected to the proportional regulating valve plug 402 and a proportional regulating solenoid 408 for driving the central guide rod 407 to move toward a predetermined direction, as shown in fig. 8 and 9, so as to achieve the action effect of driving the proportional regulating valve plug 402 to move away from or close to the proportional regulating valve hole 401.

To sum up, the utility model discloses a this cup joint hole that keeps little iron core bottom is connected with this pair valve rod, can let keep that little iron core top has the complete magnetic surface of inhaling, and with the main valve rod cladding cover solid moving the iron core periphery, can let the sliding chamber of main valve rod and establish the little iron core sectional area maximize of keeping at the sliding chamber, promote should keep little iron core and should move the attached effect of inhaling magnetism between the iron core, lead to magnetism at this solenoid group and drive this owner, this owner is kept away from according to the preface to vice valve plug group, when vice valve hole, can ensure this vice valve plug group and maintain the open valve state of setting for, more positive relatively, reliable means maintains the combustion apparatus and normally operates, and in order to produce more stable, real firepower regulating effect.

The above description of the embodiments and the drawings are only for purposes of illustrating the preferred embodiments of the present invention and are not to be construed as limiting the scope of the present invention; the similar or equivalent objects, structures, devices, characteristics, etc. should be considered as belonging to the protection scope of the present invention.

Claims (10)

1. The utility model provides a mother and son valve formula gas solenoid valve, this mother and son valve formula gas solenoid valve sets up in the pipeline of control combustion apparatus supply gas which characterized in that: the device comprises a main valve plug group and a main valve hole for controlling whether the upstream gas inlet of the pipeline is opened or not, an auxiliary valve plug group and an auxiliary valve hole for controlling whether the downstream gas outlet of the pipeline is opened or not, and an electromagnetic coil group for controlling the main valve plug group and the auxiliary valve plug group to act; wherein:

the main valve plug group comprises a movable iron core which receives the magnetism of the electromagnetic coil group and moves away from the main valve hole, a main valve rod fixed at the tail end of the movable iron core, a main valve plug arranged at the tail end of the main valve rod and a main valve plug spring which constantly pushes the main valve plug to the main valve hole for sealing, the top of the main valve rod is provided with a sliding chamber with a fixed distance with the bottom surface of the movable iron core, the bottom of the sliding chamber is provided with a through hole penetrating to the inner periphery of the main valve hole, a small holding iron core is movably arranged in the sliding chamber, the top surface of the small holding iron core is a magnetic absorption surface which can be attached to the bottom surface of the movable iron core after the magnetism is introduced, and the bottom surface of the small holding iron core is provided with a sleeving hole communicated with the through hole;

the auxiliary valve plug group comprises an auxiliary valve rod which penetrates through the sleeve hole in a sliding mode and is connected with the small iron core in a sliding mode, the tail end of the auxiliary valve rod penetrates through the through hole and is provided with an auxiliary valve plug, the auxiliary valve plug is constantly propped by a spring of the auxiliary valve plug to seal the auxiliary valve hole, when the movable iron core receives the magnetic movement of the electromagnetic coil group to enable the main valve plug rod and the main valve plug to be away from the main valve hole synchronously and to be opened, the surface-shaped magnetic absorption attachment is formed by the magnetic absorption surface on the top surface of the small iron core and the bottom surface of the movable iron core, and then the auxiliary valve plug group can be stably maintained in a synchronous opening state.

2. A master-slave valve type gas solenoid valve as claimed in claim 1, wherein the top of the main valve rod has an outer diameter larger than the tail end of the movable iron core, and is fixed to the tail end of the movable iron core by wrapping from outside to inside at a position above the sliding chamber, so that the magnetic attraction surface of the small iron core inside the sliding chamber and the tail end of the movable iron core have the same area to increase the magnetic attraction force therebetween.

3. A master-slave valve type gas electromagnetic valve as claimed in claim 1, wherein the end of the auxiliary valve stem extending into the socket hole is provided with a necking section, and a plug ring fixed at the socket hole is movably sleeved at the necking section.

4. A master-slave valve type gas solenoid valve as claimed in claim 1, wherein a micro spring is disposed in the sliding chamber of the main valve stem for constantly urging the small holding core toward the movable core, and the micro spring has a smaller elastic force than the sub valve plug spring so as to assist the small holding core to be magnetically attracted to the movable core through the micro spring.

5. A master-slave valve type gas solenoid valve as claimed in claim 1, wherein the solenoid coil set comprises a sleeve and a solenoid coil wound around the sleeve, the movable iron core is movably disposed in the sleeve, and a fixed iron core is fixedly disposed at one end of the sleeve away from the movable iron core, and after the solenoid coil is energized, the movable iron core can move towards the fixed iron core by the fixed iron core being energized.

6. The master-slave valve type gas solenoid valve according to any one of claims 1 to 5, wherein the sub-valve hole is connected to a proportional main valve for controlling the downstream gas outlet of the pipeline to be closed or opened, the proportional main valve is controlled to open or close by the gas pressure provided by the sub-valve hole, the sub-valve hole bypasses a pressure relief valve hole in a section connected to the proportional main valve to be connected to the downstream gas outlet, the pressure relief valve hole is provided with a needle and a pressure relief valve plug which can be pushed by the sub-valve plug set to move away from the pressure relief valve hole when the sub-valve plug set seals the valve, and a pressure relief valve plug spring is further provided for constantly pushing the needle and the pressure relief valve plug against the pressure relief valve hole in the pressure relief direction.

7. The master-slave valve type gas solenoid valve as claimed in claim 6, wherein the sub-valve hole is further connected to a proportional regulating valve for controlling the opening degree of the proportional main valve at a section connected to the proportional main valve, the proportional regulating valve comprises a proportional regulating valve hole connected to the sub-valve hole, a proportional regulating valve plug, and a driving assembly for driving the proportional regulating valve plug to move away from or close to the proportional regulating valve hole.

8. A master-slave valve type gas solenoid valve as claimed in claim 7, wherein said driving assembly comprises a motor, a gear set drivingly coupled to said motor and said proportional regulating valve plug, said gear set being drivingly coupled to said motor via a clutch mechanism when said proportional regulating valve plug abuts against said proportional regulating valve hole, said motor being set to stop operating when said gear set rotation signal is not received.

9. A master-slave valve type gas electromagnetic valve as claimed in claim 8, wherein the motor is further electrically connected with a pressure sensor for detecting the pressure of the downstream gas outlet.

10. The master-slave valve type gas solenoid valve as claimed in claim 7, wherein the driving assembly comprises a central guide rod connected to the proportional control valve plug, and a proportional control solenoid coil for driving the central guide rod to move in a predetermined direction.

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