CN219588230U - Novel fuel gas proportional valve and fuel gas water heater thereof - Google Patents

Abstract

The utility model discloses a novel fuel gas proportional valve, which comprises: the valve body assembly is provided with a valve chamber, an air inlet and an air outlet, the valve chamber comprises an air outlet cavity and an adjusting cavity, at least part of the air outlet cavity is positioned at the periphery of the upper end of the adjusting cavity and is communicated with the adjusting cavity, the air inlet is communicated with the adjusting cavity, and the air outlet is communicated with the air outlet cavity; the electromagnetic assembly is arranged at the bottom of the valve body assembly; the valve core assembly comprises an adjusting valve core, an adjusting diaphragm and a magnetic ring, wherein the adjusting valve core is movably arranged in the adjusting cavity and the air outlet cavity, the adjusting diaphragm and the magnetic ring are respectively sleeved on the positioning part of the adjusting valve core, and the adjusting diaphragm is positioned between the magnetic ring and the electromagnetic assembly and the edge of the adjusting diaphragm is connected with the valve body assembly; and the adjusting elastic piece is arranged in the air outlet cavity, and the upper end and the lower end of the adjusting elastic piece are respectively abutted or connected with the upper end of the adjusting valve core and the upper cavity wall of the air outlet cavity. The utility model effectively solves the problem of airflow oscillation caused by the fact that the proportional valve cannot stabilize pressure in the sectional combustion process. The utility model also discloses a gas water heater.

Description

Novel fuel gas proportional valve and fuel gas water heater thereof

Technical Field

The utility model relates to the technical field of proportional valves and gas water heaters, in particular to a novel gas proportional valve and a gas water heater thereof.

Background

At present, the combustion and heating industry adopts a sectional combustion mode to meet the requirements of users on the temperature range of the water heater. When the sectional combustion is carried out, the problem that the pressure stabilizing diaphragm of the moving-magnet type fuel gas proportional valve shakes due to the fact that the fuel gas pressure value is increased greatly in a partial load section, and finally the noise of airflow oscillation can occur in the using process of the machine, so that the bathing comfort of a user is affected.

Therefore, the problem of airflow oscillation caused by the fact that the proportional valve cannot stabilize pressure in the sectional combustion process is solved effectively, and the method is a main research direction of the utility model.

Disclosure of Invention

The utility model aims to solve one of the problems existing in the related art to at least a certain extent, and therefore, the utility model provides a novel fuel gas proportional valve which is simple in structure and effectively solves the problem of airflow oscillation caused by the fact that the proportional valve cannot be stabilized in the sectional combustion process.

The utility model also provides a gas water heater with the novel gas proportional valve.

According to the novel fuel gas proportional valve, the novel fuel gas proportional valve is realized through the following technical scheme:

a novel gas proportioning valve, comprising: the valve body assembly is provided with a valve chamber, an air inlet and an air outlet, the valve chamber comprises an air outlet cavity and a regulating cavity, at least part of the air outlet cavity is positioned at the periphery of the upper end of the regulating cavity and is communicated with the regulating cavity, the air inlet is communicated with the regulating cavity, and the air outlet is communicated with the air outlet cavity; the electromagnetic assembly is arranged at the bottom of the valve body assembly; the valve core assembly comprises an adjusting valve core, an adjusting diaphragm and a magnetic ring, wherein the adjusting valve core is arranged in the adjusting cavity and the air outlet cavity in a vertically movable manner, a positioning part extending downwards is fixedly arranged at the lower end of the adjusting valve core, the adjusting diaphragm and the magnetic ring are respectively sleeved on the positioning part, and the adjusting diaphragm is positioned between the magnetic ring and the electromagnetic assembly and the edge of the adjusting diaphragm is connected with the valve body assembly; and the adjusting elastic piece is arranged in the air outlet cavity, and the upper end and the lower end of the adjusting elastic piece are respectively abutted or connected with the upper end of the adjusting valve core and the upper cavity wall of the air outlet cavity.

In some embodiments, the magnetic ring is distributed between the bottom surface of the fixed seat of the electromagnetic assembly and the top surface of the mounting bracket of the valve body assembly, or the bottom surface of the magnetic ring is distributed between the bottom surface of the fixed seat of the electromagnetic assembly and the top surface of the regulating valve core.

In some embodiments, the magnetic ring is a neodymium-iron-boron magnet.

In some embodiments, the valve shaft is movably disposed in the adjusting cavity and the air outlet cavity up and down, the positioning portion is disposed at the lower end of the valve shaft, an annular groove opening towards the radial outer side is disposed at the upper end of the valve shaft, the annular groove is disposed at the junction of the adjusting cavity and the air outlet cavity, and the sealing element is embedded in the annular groove.

In some embodiments, the valve core assembly further comprises a pressure plate and a clamp spring, wherein the clamp spring is clamped outside the positioning part and is positioned below the adjusting diaphragm, and the pressure plate is arranged between the adjusting diaphragm and the clamp spring and is used for tightly pressing the adjusting diaphragm to the bottom surface of the magnetic ring.

In some embodiments, the valve body assembly further has a damping hole, the adjusting diaphragm divides the adjusting cavity into a gas cavity and a buffer cavity, the gas cavity is respectively communicated with the gas inlet and the gas outlet, and the buffer cavity is located below the gas cavity and is communicated with the external atmosphere through the damping hole.

In some embodiments, the upper end of the adjusting valve core is provided with an upward opening and is communicated with the mounting groove of the air outlet cavity, a downward extending limiting part is fixedly arranged at the position of the upper cavity wall of the air outlet cavity corresponding to the mounting groove, the lower end of the adjusting elastic piece is inserted into the mounting groove, and the upper end of the adjusting elastic piece is sleeved outside the limiting part and is abutted to the upper cavity wall of the air outlet cavity.

In some embodiments, the valve body assembly comprises a valve body, a valve cover and a mounting bracket, wherein the valve body is provided with an air pressure cavity with openings at the upper end and the lower end, the air inlet and the air outlet, the valve cover covers the opening at the lower end of the air pressure cavity and is in sealing connection with the valve body, and the mounting bracket covers the opening at the upper end of the air pressure cavity and is in sealing connection with the valve body; the valve chamber is formed by surrounding the air pressure cavity, the valve cover and the mounting bracket; the outer edge of the adjusting diaphragm is clamped between the valve body and the valve cover.

In some embodiments, the valve body of the valve body assembly further comprises a vertically arranged gas flow passage, the gas outlet end of the gas flow passage is communicated with the adjusting cavity through the gas inlet, a mounting opening is arranged at the position, corresponding to the gas inlet, of the gas flow passage, and the stop valve is arranged at the mounting opening and is in sealing connection with the valve body.

In some embodiments, the bottom of the fuel gas flow channel is open to form a fuel gas inlet at which a filter screen is provided; and/or the top of the fuel gas runner is opened to form a core pulling port, and a plug is connected at the core pulling port in a sealing way.

According to the gas water heater, the gas water heater is realized through the following technical scheme: the gas water heater is provided with the novel gas proportional valve.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

1. according to the novel fuel gas proportional valve, the regulating valve core is arranged in the regulating cavity and the air outlet cavity in a vertically movable manner, the regulating diaphragm and the magnetic ring are respectively sleeved on the positioning part of the regulating valve core, the regulating elastic piece is clamped between the regulating valve core and the upper cavity wall of the air outlet cavity, the magnetic ring drives the regulating valve core through the magnetic force action of the electromagnetic assembly so as to realize the fuel gas proportional output function, and the fuel gas regulated output is realized under the cooperation of the regulating diaphragm and the regulating elastic piece;

2. compared with the traditional moving-magnet type electric valve, the magnetic ring is far away from the electromagnetic assembly and is closer to the air outlet adjusting end of the adjusting valve core, the problem that the adjusting diaphragm shakes easily in the adjusting process, especially when the air inlet pressure is too large due to the overlong moment arm is solved, so that the problem of airflow oscillation caused by the fact that the proportional valve cannot stabilize pressure in the sectional combustion process is effectively solved, and noise is reduced;

3. the magnetic rings are distributed between the bottom surface of the fixed seat of the electromagnetic assembly and the top surface of the mounting bracket of the valve body assembly, or the bottom surface of the magnetic rings are distributed between the bottom surface of the fixed seat of the electromagnetic assembly and the top surface of the adjusting valve core, so that the distance between the magnetic rings and the air outlet adjusting end of the adjusting valve core is reduced, the magnetic rings better play a role in balancing the force arm, and the problem that the adjusting diaphragm shakes in the adjusting process due to overlong force arm is solved.

Drawings

FIG. 1 is an exploded view of a novel fuel gas proportional valve in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view I of a novel fuel gas proportional valve in accordance with an embodiment of the present utility model;

FIG. 3 is a second cross-sectional view of the novel fuel gas proportional valve in accordance with an embodiment of the present utility model;

FIG. 4 is an exploded view of a valve cartridge assembly in an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a valve cartridge assembly in an embodiment of the utility model;

FIG. 6 is an enlarged partial view of portion A of FIG. 5;

FIG. 7 is a schematic view of the structure of a valve body according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a valve body in an embodiment of the utility model;

FIG. 9 is a schematic view of a valve cover according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a mounting bracket in an embodiment of the utility model;

FIG. 11 is a graph showing the pressure regulating or stabilizing characteristics of the novel fuel gas proportional valve in an embodiment of the present utility model.

In the figure: 1-valve body assembly, 101-air inlet, 102-air outlet, 1031-air outlet cavity, 1032-gas cavity, 1033-buffer cavity, 104-damping hole, 1041-orifice, 105-limit part, 11-valve body, 111-gas pressure cavity, 112-gas flow channel, 1121-mounting port, 1122-gas inlet, 1123-core pulling port, 113-positioning groove, 12-valve cover, 120-annular protrusion, 121-void-avoiding groove, 122-through hole, 13-mounting bracket, 131-diaphragm, 132-riser, 14-gasket, 141-gap, 15-seal ring, 16-filter screen, 17-plug, 18-first fastener; 2-electromagnetic components, 21-fixing seats, 22-coils, 23-iron cores and 24-second fasteners; 3-valve core components, 31-adjusting valve cores, 311-valve shafts, 3111-positioning parts, 3112-inverted conical parts, 3113-annular grooves, 3114-mounting grooves, 312-sealing elements, 32-adjusting diaphragms, 321-central cavities, 322-outer annular cavities, 323-outer annular walls, 33-magnetic rings, 34-pressure plates, 341-cavities, 342-sinking tables, 35-clamp springs, 351-central holes and 352-flanging; 4-adjusting the elastic member; 5-stop valve.

Detailed Description

The following examples illustrate the utility model, but the utility model is not limited to these examples. Modifications and equivalents of some of the technical features of the specific embodiments of the present utility model may be made without departing from the spirit of the present utility model, and they are all included in the scope of the claimed utility model.

Referring to fig. 1-3, the present embodiment provides a novel fuel gas proportional valve, which includes a valve body assembly 1, an electromagnetic assembly 2, a valve core assembly 3 and an adjusting elastic member 4, wherein the valve body assembly 1 has a valve chamber (not shown in the figure), an air inlet 101 and an air outlet 102, the valve chamber includes an air outlet chamber 1031 and an adjusting chamber (not shown in the figure), at least part of the air outlet chamber 1031 is located at the periphery of the upper end of the adjusting chamber and is communicated with the air outlet end of the adjusting chamber, the air inlet 101 is communicated with the adjusting chamber, the air outlet 102 is communicated with the air outlet chamber 1031, and thus, the air inlet 101, the adjusting chamber, the air outlet chamber 1031 and the air outlet 102 together form a fuel gas output channel. The electromagnetic assembly 2 is mounted at the bottom of the valve body assembly 1 and is arranged near the air inlet end of the adjusting cavity. Specifically, if the regulating chamber is designed to be located at the upper end of the outlet chamber 1031, and the outlet end of the regulating chamber is in communication with the upper end of the outlet chamber 1031, the solenoid assembly 2 is correspondingly fixedly mounted on the top of the valve body assembly 1 and disposed adjacent to the inlet end of the regulating chamber.

The valve core assembly 3 is disposed in the adjusting cavity and the air outlet cavity 1031, and the valve core assembly 3 moves up and down under the driving of the electromagnetic assembly 2 to adjust the ventilation area of the adjusting cavity and the air outlet cavity 1031. In this embodiment, the valve core assembly 3 includes an adjusting valve core 31, an adjusting diaphragm 32 and a magnetic ring 33, where the adjusting valve core 31 is movably disposed in the adjusting cavity and the air outlet cavity 1031 up and down, and is used for adjusting the ventilation area of the adjusting cavity and the air outlet cavity 1031. A positioning part 3111 extending downwards is fixed at the lower end of the adjusting valve core 31, an adjusting diaphragm 32 and a magnetic ring 33 are respectively sleeved on the positioning part 3111, the adjusting diaphragm 32 is positioned between the magnetic ring 33 and the electromagnetic assembly 2, and the outer edge of the adjusting diaphragm is connected with the valve body assembly 1. Therefore, the magnetic ring 33 drives the regulating valve core 31 to realize the function of fuel gas proportion output through the magnetic force action of the electromagnetic assembly 2, and the regulating diaphragm 32 is plastically deformed to realize the valve chamber pressure stabilizing action in the working process of the fuel gas proportion valve, namely, the self-adaptive regulation of the regulating diaphragm 32 is realized to realize the fuel gas pressure stabilizing output. The adjusting elastic piece 4 is arranged in the air outlet cavity 1031, the upper end and the lower end of the adjusting elastic piece 4 are respectively abutted or connected with the upper end of the adjusting valve core 31 and the upper cavity wall of the air outlet cavity 1031, and the gas pressure is buffered and balanced when the gas proportion is adjusted through the adjusting elastic piece 4, so that the stable output of the gas pressure is ensured, and the stable output of the gas proportion valve is ensured under the cooperation of the adjusting diaphragm 32 and the adjusting elastic piece 4.

Compared with the traditional moving-magnet type fuel gas proportional valve, the magnetic ring 33 of the embodiment has a relatively long distance from the electromagnetic assembly 2, if ferrite materials are adopted, the magnetic ring 33 of the embodiment is made of neodymium-iron-boron materials with stronger magnetism, namely, the magnetic ring 33 is made of neodymium-iron-boron magnets, so that the distance between the magnetic ring 33 and the air outlet adjusting end of the adjusting valve core is reduced, and the problem that the adjusting diaphragm 32 shakes due to overlong force arms in the adjusting process is solved.

The magnetic ring position of the traditional moving-magnet type electric valve adjusting valve core is arranged on the adjusting diaphragm and the electromagnetic assembly, so that the magnetic ring position is close to the electromagnetic assembly end and far away from the air outlet adjusting end of the adjusting valve core 31, and the problem that the diaphragm shakes easily in the adjusting process, especially when the air inlet pressure is overlarge, due to overlong force arm is caused. To solve this problem, in this embodiment, the magnetic ring 33 is distributed between the bottom surface of the fixed seat 21 of the electromagnetic assembly 2 and the top surface of the mounting bracket 13 of the valve body assembly 1, and referring to fig. 2-3, it is specifically described that "middle" may be understood as a midpoint of the relative distance d between the bottom surface of the fixed seat 21 and the top surface of the mounting bracket 13, and "middle" may also be understood as being near the midpoint of the relative distance d, for example, the midpoint of the relative distance d±1 to 6%d; alternatively, the bottom surface of the magnetic ring 33 is distributed between the bottom surface of the fixed seat 21 of the electromagnetic assembly 2 and the top surface of the adjusting valve core 31, and referring to fig. 3, it is specifically explained that "middle" may be understood as a midpoint of a relative distance D between the bottom surface of the fixed seat 21 and the top surface of the adjusting valve core 31, and "middle" may be understood as a vicinity of the midpoint of the relative distance D, for example, a midpoint ±1 to 6%D of the relative distance D. Therefore, the distance between the magnetic ring 33 and the air outlet adjusting end of the adjusting valve core 31 is reduced, so that the magnetic ring 33 plays a better role in balancing the force arm, and the problem that an adjusting diaphragm shakes in an adjusting process due to overlong force arm is solved.

Referring to fig. 3 and 5, the valve body assembly 1 further has a damping hole 104. The adjusting diaphragm 32 divides the adjusting chamber into a gas chamber 1032 and a buffer chamber 1033, the gas chamber 1032 is respectively communicated with the gas inlet 101 and the gas outlet chamber 1031, in this embodiment, the gas chamber 1032 adopts a structure of a conical gas chamber, so that the effect of buffering the gas flow can be achieved in the gas adjusting process. The buffer chamber 1033 is located below the gas chamber 1032, i.e., the buffer chamber 1033 is located between the regulator membrane 32 and the solenoid assembly 2, and the buffer chamber 1033 communicates with the external atmosphere outside the valve body assembly 1 through the damping orifice 104. Therefore, when the fuel gas proportional valve performs a fuel gas adjusting process and the pressure of the fuel gas end above the adjusting diaphragm 32 changes, the adjusting diaphragm 32 realizes a pressure stabilizing effect through the balance adjustment of the atmospheric pressure.

In this embodiment, the damping hole 104 includes an outer large through hole, a middle and small through hole and an orifice 1041 sequentially from outside to inside, the diameter of the orifice 1041 is smaller than the diameter of the middle and small through hole and smaller than the diameter of the outer large through hole, and the buffer chamber 1033 directly throttles the radially inner end of the orifice 1041, so that the sudden change of the atmospheric pressure in the buffer chamber 1033 is prevented by the orifice 1041, and the atmospheric pressure in the buffer chamber 1033 is effectively ensured to play a better role in buffering the regulating membrane 32. In other embodiments, the outer large or small through holes may be omitted.

Referring to fig. 1-3, the electromagnetic assembly 2 is an electromagnetic proportional valve, which includes a fixing base 21, a coil 22, an iron core 23, and a second fastening member 24, wherein the fixing base 21 is installed at the bottom of the valve body assembly 1, and is detachably connected with the valve body assembly 1 through a plurality of second fastening members 24 (such as screws). The iron core 23 is vertically arranged at the center of the fixed seat 21 and is stably and reliably connected with the fixed seat 21, and the coil 22 is arranged in the fixed seat 21 and is positioned at the periphery of the iron core 23. When the coil 22 of the electromagnetic assembly 2 is electrified, an electromagnetic field for driving the magnetic ring 33 is generated, different magnetic field forces are generated through the output of the current, the magnetic ring 33 drives the regulating valve core 31 to move up and down under the action of the different magnetic field forces, so that the ventilation area of the regulating cavity and the gas outlet cavity 1031, namely the ventilation area of the gas cavity 1032 and the gas outlet cavity 1031, is regulated, and the required secondary pressure is output; when the coil 22 of the electromagnetic assembly 2 is de-energized, the regulating valve core 31 is reset downwards in the regulating elastic member 4, so as to cut off the passage between the gas cavity 1032 and the gas outlet cavity 1031, and stop outputting the secondary pressure.

Referring to fig. 1 to 5, the regulating valve core 31 includes a valve shaft 311 and a sealing member 312 having an inverted cone shape, the valve shaft 311 is disposed in the regulating chamber and the gas outlet chamber 1031 to be movable up and down, a positioning portion 3111 is provided at a lower end of the valve shaft 311, and a limit step (not shown) for upper limit of the magnet ring 33 is formed at an upper end of the positioning portion 3111 at a periphery thereof. At the upper end of the valve shaft 311, an inverted conical portion 3112 is provided, the inverted conical portion 3112 being provided with an annular groove 3113 opening radially outward, the annular groove 3113 being arranged in correspondence of the junction of the regulating chamber and the outlet chamber 1031. The sealing element 312 is embedded in the annular groove 3113, and the sealing element 312 is driven by the valve shaft 311 to open or close a passage between the adjusting cavity and the gas outlet cavity 1031, and is also used for adjusting a ventilation area between the adjusting cavity and the gas outlet cavity 1031, i.e. adjusting a gap between the sealing element 312 and a junction, when the gas proportional valve works, so as to realize the output of the size of the gas channel.

The upper end of the regulating valve core 31 is provided with a mounting groove 3114 which is opened upwards and communicated with the air outlet cavity 1031, namely, the upper end of the valve shaft 311 is concavely provided with a mounting groove 3114 which is opened upwards and communicated with the air outlet cavity 1031. The position of the upper cavity wall of the air outlet cavity 1031 corresponding to the mounting groove 3114 is fixedly provided with a limiting portion 105 extending downwards, i.e. the position of the mounting bracket 13 of the valve body assembly 1 corresponding to the mounting groove 3114 is fixedly provided with a limiting portion 105 extending downwards. The adjusting elastic member 4 is an adjusting spring, the lower end of the adjusting elastic member is inserted into the mounting groove 3114 and abuts against the valve shaft 311, and the upper end of the adjusting elastic member is sleeved outside the limiting portion 105 and abuts against the upper cavity wall of the air outlet cavity 1031 or the mounting bracket 13.

Referring to fig. 3 to 5, the adjusting diaphragm 32 has a central cavity 321 opened downward, a central through hole for the positioning portion 3111 to pass through is provided at the central position of the central cavity 321, the adjusting diaphragm 32 is sleeved outside the positioning portion 3111 and is respectively in sealing connection with the bottom surfaces of the positioning portion 3111 and the magnetic ring 33, in addition, the edge of the adjusting diaphragm 32 is in sealing connection with the valve body assembly 1, so that the adjusting cavity is divided into a gas cavity 1032 and a buffer cavity 1033 which are not communicated with each other by the adjusting diaphragm 32, and the gas in the gas cavity 1032 and the atmosphere in the buffer cavity 1033 are prevented from being in a mutually-stringing phenomenon.

The adjusting diaphragm 32 is further provided with an outer annular cavity 322 which is opened upwards and is positioned at the periphery of the central cavity 321, and the radial inner side of the bottom surface of the outer annular cavity 322 is enclosed with the inner annular wall to form a V shape, so that the plastic deformation of the adjusting diaphragm 32 is enhanced, and the pressure stabilizing effect of the air pressure cavity is better achieved. In this embodiment, the outer annular wall 323 of the outer annular cavity 322 and the radial outer side of the bottom surface of the outer annular cavity 322 are both clamped between the valve body 11 and the valve cover 12 of the valve body assembly 1, so that not only the adjusting diaphragm 32 is firmly and reliably connected with the valve body assembly 1 in a sealing manner, but also the matching position of the valve body 11 and the valve cover 12 can be sealed, and the air leakage phenomenon at the matching position of the valve body 11 and the valve cover 12 is prevented.

Referring to fig. 4-6, the magnetic ring 33 is sleeved outside the positioning portion 3111 and clamped between the adjusting diaphragm 32 and the limiting step. The valve core assembly 3 further comprises a pressure plate 34 and a clamp spring 35, wherein the clamp spring 35 is clamped outside the positioning part 3111 and is located below the adjusting diaphragm 32. The pressure plate 34 is disposed between the adjusting diaphragm 32 and the clamp spring 35 and sleeved outside the positioning portion 3111, and is used for pressing the top surface of the central cavity 341 of the adjusting diaphragm 32 against the bottom surface of the magnetic ring 33. Thus, the regulating diaphragm 32 is fixedly connected to the positioning portion 3111 by the engagement of the pressure plate 34 and the clamp spring 35.

In this embodiment, the pressure plate 34 has a cavity 341 with a downward opening, a sinking platform 342 extending into the cavity 341 is integrally formed by downward stamping at the center of the top surface of the pressure plate 34, a shaft hole for the positioning portion 3111 to pass through is formed at the center of the sinking platform 342, and when the pressure plate 34 is installed, the pressure plate 34 is accommodated in the central cavity 341 of the adjusting diaphragm 32 from bottom to top and is sleeved outside the positioning portion 3111.

The clip 35 has a center hole 351 through which the positioning portion passes, and a flange 352 is integrally formed at the periphery of the center hole 351, and the flange 352 is disposed downward and obliquely toward the inside of the center hole 351. During installation, the clamp spring 35 is sleeved outside the positioning portion 3111 from bottom to top, the pressure plate 34 is tightly pressed on the adjusting diaphragm 32, the flange 352 is in interference fit connection with the positioning portion 3111, and referring to fig. 6, the clamp spring 35 is firmly and reliably connected to the positioning portion.

Referring to fig. 1-2, the novel fuel gas proportional valve further comprises a stop valve 5, the valve body assembly 1 is further provided with a fuel gas flow passage 112 which is vertically arranged, the fuel gas flow passage 112 is arranged on the left side of the adjusting cavity, the air outlet end of the fuel gas flow passage 112 is communicated with the adjusting cavity through the air inlet 101, a mounting opening 1121 is arranged at the position of the fuel gas flow passage 112 corresponding to the air inlet 101, and the stop valve 5 is arranged at the mounting opening 1121 and is in sealing connection with the valve body 11 and used for opening or closing the air inlet 101. In this embodiment, the stop valve 5 is detachably connected with the valve body 11 by using a screw, and a sealing ring 15 is disposed at the matching position of the mounting port 1121 and the stop valve 5 to ensure that the stop valve 5 is in sealing connection with the mounting port 1121.

Referring to fig. 1 to 3 and 7 to 10, the valve body assembly 1 includes a valve body 11, a valve cover 12 and a mounting bracket 13, the valve body 11 has an air pressure chamber 111 with upper and lower ends open, an air inlet 101 and an air outlet 102, the air inlet 101 is disposed at the left side of the air pressure chamber 111 and communicates with the air pressure chamber 111, and the air outlet 102 is disposed at the front side of the valve body 11 and communicates with the air pressure chamber 111. The valve cover 12 covers the lower end opening of the air pressure chamber 111 and is hermetically connected to the valve body 11, and the valve cover 12 presses the edge of the regulating diaphragm 32 against the bottom surface of the valve body 11. The mounting bracket 13 covers the upper end opening of the air pressure cavity 111 and is in sealing connection with the valve body 11, and in addition, the mounting bracket 13 is not only used for abutting against the upper end of the adjusting spring, but also used for fixedly connecting the fuel gas proportional valve on the fuel gas water heater. In this embodiment, the valve chamber is formed by the air pressure chamber 111, the valve cover 12 and the mounting bracket 13.

A fuel gas flow passage 112 is integrally formed on the right side of the valve body 11, and the gas outlet end of the fuel gas flow passage 112 communicates with the air pressure chamber 111 or the valve chamber through the air inlet 101. The bottom of the gas flow passage 112 is opened to form a gas inlet 1122, and a filter screen 16 is arranged at the gas inlet 1122 to realize that the gas entering the valve body assembly 1 is ensured to be clean by the filter screen 16, so that the performance of the proportional valve is prevented from being influenced by the entering of impurities. Further, the top of the fuel gas flow passage 112 is opened to form a core back port 1123. Thus, by forming the gas inlet 1122 at the bottom of the gas flow path 112 and the core pulling port 1123 at the top of the gas flow path 112, the problem of the reduction in the diameter of the gas flow path 112 due to the presence of the angle of pulling the film by single-side core pulling can be avoided, and the upper and lower core pulling methods are employed to form the lower and upper gas flow paths which are in communication, and the gas flow path 112 is composed of the lower and upper gas flow paths. The upper gas flow passage forms a core-pulling port 1123 after demolding and core pulling, and a plug 17 is connected at the core-pulling port 1123 in a sealing way, so that the core-pulling port 1123 is plugged by the plug 17, and the tightness of the gas flow passage 112 is ensured.

The bottom of the valve body 11 is provided with a positioning groove 113 which is downward opened and is annular, the positioning groove 113 is used for accommodating or clamping an outer annular wall 323 of the adjusting diaphragm 32, and referring to fig. 2-3, when the valve is installed, the adjusting diaphragm 32 is pushed into the air pressure cavity 111 from bottom to top, and the outer annular wall 323 of the adjusting diaphragm 32 is clamped in the positioning groove 113, so that the positioning of the adjusting diaphragm 32 in a preset position and the limiting of the radial direction are realized through the outer annular wall 323 and the positioning groove 113 which are matched and clamped.

Referring to fig. 2-3 and 9, the top surface of the valve cover 12 is integrally formed with an upwardly extending annular protrusion 120, and the annular protrusion 120 extends into the air pressure chamber 111 from bottom to top and abuts the adjusting diaphragm 32 to press the edge of the adjusting diaphragm 32 against the valve body 11. In this embodiment, the buffer chamber 1033 is defined by the annular protrusion 120, the top surface of the valve cover 12, and the regulator membrane 32. In order to ensure a sufficient downward movement space of the regulating valve core 31, a downward concave and upward opening clearance groove 121 is provided on the top surface of the valve cover 12, and the clearance groove 121 is located right below the positioning portion 3111 and communicates with the buffer chamber 1033. The positioning portion 3111 of the regulating valve core 31 is inserted into the clearance groove 121 so as to be movable up and down, and a space is left between the positioning portion and the bottom surface of the clearance groove 121.

The front surface of the valve cover 12 is provided with a damping hole 104 communicated with the buffer chamber 1033, and four corners of the valve cover 12 are respectively provided with vertically arranged through holes 122 which respectively penetrate through the upper end surface and the lower end surface of the valve cover 12 and are used for the second fastening piece 24 to movably penetrate through. The electromagnetic assembly 2 is arranged at the bottom of the valve cover 12, the electromagnetic assembly 2 is provided with second fasteners 24 which are arranged in one-to-one correspondence with the through holes 122, and the second fasteners 24 penetrate through the through holes 122 from bottom to top and are in fastening connection with the valve body 11, so that the electromagnetic assembly 2 and the valve cover 12 are detachably connected at the bottom of the valve body 11 together by the aid of the second fasteners 24, connecting parts and connecting procedures are reduced, and the dismounting efficiency is improved.

Referring to fig. 2 to 3 and 10, the mounting bracket 13 includes a cross plate 131 and a vertical plate 132 connected in an L-shape, the cross plate 131 covers an upper end opening of the air pressure chamber 111 and is detachably connected with an upper end of the valve body 11 through a first fastener 18, and a limiting part 105 recessed downward is integrally formed at a position of the cross plate 131 corresponding to the adjusting spring. The riser 132 is formed by the integrative upward bending of rear side of diaphragm 131, and the gas proportional valve can pass through riser 132 fixed connection gas heater.

In order to ensure air tightness between the transverse plate 131 and the valve body 11, a gasket 14 is provided between the transverse plate 131 and the valve body 11, and notches 141 are formed at four corners of the gasket 14, each notch 141 being for the first fastener 18 to move through.

The pressure regulating characteristic or the pressure stabilizing characteristic of the novel fuel gas proportional valve of the present embodiment is described below with reference to fig. 11.

Test conditions of the novel fuel gas proportional valve: normal temperature, 25+/-15 degrees; normal humidity, 15-85% RH; atmospheric pressure, 86000-106000 Pa; the intelligent tester for the proportional valve comprises a testing instrument; testing the medium, air; gas type, natural gas; equivalent nozzle aperture, Φ3.48mm; minimum primary pressure, 1000Pa; standard primary pressure, 2000Pa; maximum primary pressure, 3000Pa.

The test results of the pressure regulating characteristic or the pressure stabilizing characteristic of the novel fuel gas proportional valve are shown in table 1.

TABLE 1 pressure regulating or stabilizing characteristics of novel gas proportional valve

Referring to fig. 11 and table 1, after the output of the novel fuel gas proportional valve, the pressure change process can be analyzed by the proportional valve adjusting curve. When the pressure output return difference is less than 30Pa under the condition of the minimum secondary pressure output; the pressure output return difference is less than 70Pa when the pressure output is at the maximum secondary pressure output. It can be seen that the proportional valve has better pressure stabilizing characteristics.

The embodiment also provides a gas water heater, the gas water heater has a novel gas proportional valve as described above, the magnetic ring 33 structure of the novel gas proportional valve is changed to arrange the balance proportion adjusting force arm, and the problem that the adjusting diaphragm shakes easily when the adjusting process, especially the air inlet pressure is overlarge due to overlong force arm is solved by changing the material selection of the magnetic ring 33, thereby effectively solving the problem of airflow oscillation caused by the fact that the proportional valve cannot stabilize pressure in the sectional combustion process and reducing noise.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (11)

1. A novel gas proportioning valve, characterized by comprising:

a valve body assembly (1) provided with a valve chamber, an air inlet (101) and an air outlet (102), wherein the valve chamber comprises an air outlet cavity (1031) and a regulating cavity, at least part of the air outlet cavity (1031) is positioned at the periphery of the upper end of the regulating cavity and communicated with the regulating cavity, the air inlet (101) is communicated with the regulating cavity, and the air outlet (102) is communicated with the air outlet cavity (1031);

the electromagnetic assembly (2) is arranged at the bottom of the valve body assembly (1);

the valve core assembly (3) comprises an adjusting valve core (31), an adjusting diaphragm (32) and a magnetic ring (33), wherein the adjusting valve core (31) is arranged in the adjusting cavity and the air outlet cavity (1031) in a vertically movable mode, a positioning part (3111) extending downwards is fixedly arranged at the lower end of the adjusting valve core (31), the positioning part (3111) is respectively sleeved with the adjusting diaphragm (32) and the magnetic ring (33), and the adjusting diaphragm (32) is arranged between the magnetic ring (33) and the electromagnetic assembly (2) and is connected with the valve body assembly (1) at the edge of the adjusting diaphragm; and

the adjusting elastic piece (4) is arranged in the air outlet cavity (1031), and the upper end and the lower end of the adjusting elastic piece are respectively abutted or connected with the upper end of the adjusting valve core (31) and the upper cavity wall of the air outlet cavity (1031).

2. The novel fuel gas proportional valve according to claim 1, wherein the magnetic ring (33) is distributed between the bottom surface of the fixed seat (21) of the electromagnetic assembly (2) and the top surface of the mounting bracket (13) of the valve body assembly (1), or the bottom surface of the magnetic ring (33) is distributed between the bottom surface of the fixed seat (21) of the electromagnetic assembly (2) and the top surface of the regulating valve core (31).

3. A novel gas proportioning valve as set forth in claim 1 or 2, wherein said magnetic ring (33) is a neodymium-iron-boron magnet.

4. The novel fuel gas proportional valve according to claim 1, wherein the valve core (31) comprises a valve shaft (311) and a sealing member (312) in an inverted cone shape, the valve shaft (311) is arranged in the adjusting cavity and the air outlet cavity (1031) in a vertically movable manner, the positioning part (3111) is arranged at the lower end of the valve shaft (311), an annular groove (3113) opening towards the radial outer side is arranged at the upper end of the valve shaft (311), the annular groove (3113) is arranged at the junction of the adjusting cavity and the air outlet cavity (1031), and the sealing member (312) is embedded in the annular groove (3113).

5. The novel fuel gas proportional valve according to claim 1 or 4, wherein the valve core assembly (3) further comprises a pressure plate (34) and a clamp spring (35), the clamp spring (35) is clamped outside the positioning portion (3111) and is located below the adjusting diaphragm (32), and the pressure plate (34) is disposed between the adjusting diaphragm (32) and the clamp spring (35) and is used for tightly pressing the adjusting diaphragm (32) to the bottom surface of the magnetic ring (33).

6. The novel fuel gas proportional valve according to claim 1, wherein the valve body assembly (1) further comprises a damping hole (104), the adjusting diaphragm (32) divides the adjusting cavity into a fuel gas cavity (1032) and a buffer cavity (1033), the fuel gas cavity (1032) is respectively communicated with the air inlet (101) and the air outlet cavity (1031), the buffer cavity (1033) is located below the fuel gas cavity (1032), and the buffer cavity is communicated with the outside atmosphere through the damping hole (104).

7. The novel fuel gas proportional valve according to claim 1, wherein an upward opening mounting groove (3114) is formed in the upper end of the regulating valve core (31) and is communicated with the air outlet cavity (1031), a downward extending limiting portion (105) is fixedly arranged at a position of the upper cavity wall of the air outlet cavity (1031) corresponding to the mounting groove (3114), the lower end of the regulating elastic member (4) is inserted into the mounting groove (3114), and the upper end of the regulating elastic member is sleeved outside the limiting portion (105) and is abutted to the upper cavity wall of the air outlet cavity (1031).

8. The novel fuel gas proportional valve according to claim 1, wherein the valve body assembly (1) comprises a valve body (11), a valve cover (12) and a mounting bracket (13), the valve body (11) is provided with a gas pressure cavity (111) with upper and lower ends open, the gas inlet (101) and the gas outlet (102), the valve cover (12) covers the lower end opening of the gas pressure cavity (111) and is in sealing connection with the valve body (11), and the mounting bracket (13) covers the upper end opening of the gas pressure cavity (111) and is in sealing connection with the valve body (11); the valve chamber is formed by surrounding the air pressure cavity (111), the valve cover (12) and the mounting bracket (13); the outer edge of the adjusting diaphragm (32) is clamped between the valve body (11) and the valve cover (12).

9. A novel gas proportional valve as claimed in any one of claims 1-2 or 6-8, further comprising a shut-off valve (5) for opening or closing the gas inlet (101), the valve body (11) of the valve body assembly (1) further having a vertically arranged gas flow passage (112), the gas outlet end of the gas flow passage (112) being in communication with the regulating chamber via the gas inlet (101), a mounting opening (1121) being provided in the gas flow passage (112) at a position corresponding to the gas inlet (101), the shut-off valve (5) being provided in the mounting opening (1121) and being in sealing connection with the valve body (11).

10. The novel gas proportioning valve of claim 9 wherein the bottom of said gas flow path (112) is open to form a gas inlet (1122), a screen (16) being provided at said gas inlet (1122); and/or the top of the gas flow channel (112) is opened to form a loose core opening (1123), and a plug (17) is connected at the loose core opening (1123) in a sealing way.

11. A gas water heater, characterized by a novel gas proportional valve as claimed in any one of claims 1-10.