CN212900030U

CN212900030U - Small-sized pilot-operated gas electric control valve

Info

Publication number: CN212900030U
Application number: CN202021538073.3U
Authority: CN
Inventors: 庞智勇; 刘光钱; 高荣健
Original assignee: Guangzhou Jingding Electric Technology Co ltd
Current assignee: Guangzhou Jingding Electric Technology Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-04-06
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a small-sized pilot-operated gas electric control valve, which comprises a valve body, a gas inlet channel, a gas outlet channel and a working channel; the first electromagnetic valve controls the connection or disconnection between the air inlet channel and the working channel; the proportional valve is used for adjusting the communication state between the working channel and the air outlet channel; the input port of the servo channel is communicated with the working channel, the first output port of the servo channel is communicated with the input end of the proportional valve, and the second output port of the servo channel is communicated with the air outlet channel; a pressure regulator controlling an output pressure of the first output port; the sealing assembly is internally provided with a cleaning channel which is communicated with the servo channel; the small-sized pilot-operated gas electric control valve redesigns a servo channel, reduces the volume of the whole valve body, keeps the original adjusting function and saves the manufacturing cost; meanwhile, the cleaning channel is additionally arranged, when cleaning is needed, the servo channel can be backwashed only by aligning the air gun to the cleaning channel, dust blockage is avoided, and the subsequent cleaning steps are simplified.

Description

Small-sized pilot-operated gas electric control valve

Technical Field

The utility model relates to a gas equipment control technical field, in particular to small-size guide's formula gas automatically controlled valve.

Background

Most of the automatic control gas appliance products sold in the market are provided with current by a controller to drive a gas proportional valve, and the maximum current and the minimum current are realized by a software part of the controller. When the controller fails and an overlarge current is applied to a coil of the proportional valve, the gas flow at the outlet is increased along with the overlarge current due to the fact that a device for limiting the maximum opening degree of the proportional valve is not arranged, and potential safety hazards exist; therefore, a gas proportional valve capable of controlling the maximum air intake quantity and the minimum air intake quantity through a servo system or a servo loop is needed. However, the existing electric control valve has a complex structure, excessive flow channel division and arrangement waste production cost and design cost, so that the volume is large, the occupied space when the valve is placed in a gas appliance is large, and the assembly efficiency is low; meanwhile, the flow channel of the valve body is easily blocked by gas or impurities in the pipeline, such as dust and the like, and the valve body can be cleaned only by integrally disassembling after being blocked.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a small-size guide's formula gas automatically controlled valve, the structure is compacter, washs more conveniently.

According to an embodiment of the first aspect of the present invention, there is provided a small pilot-operated gas electric control valve, which includes a valve body, including an air inlet channel and an air outlet channel, and a working channel located between the air inlet channel and the air outlet channel; the first electromagnetic valve is arranged on the valve body and controls the connection or disconnection between the air inlet channel and the working channel; the proportional valve is arranged on the valve body and used for adjusting the communication state between the working channel and the air outlet channel; the medium cavity is arranged on the valve body and is connected with the input end of the proportional valve; the servo channel is arranged on the valve body and comprises an input port, a first output port and a second output port, the input port is communicated with the working channel, the first output port is communicated with the medium cavity, and the second output port is communicated with the air outlet channel; the pressure regulator is arranged on the valve body, and the output end of the pressure regulator is arranged between the servo channel and the air outlet channel and used for controlling the output pressure of the first output port; the sealing assembly is detachably arranged on the valve body, a cleaning channel is arranged in the sealing assembly, the upper end of the cleaning channel is located at the top of the sealing assembly, and the lower end of the cleaning channel is communicated with the servo channel.

Has the advantages that: the small-sized pilot-operated gas electric control valve reduces the volume of the whole valve body, keeps the original adjusting function and saves the manufacturing cost by redesigning the servo channel; further, add when designing the runner and establish the washing passageway, the upper end of wasing the passageway directly sets up on the valve body surface, only needs aim at the upper end of wasing the passageway with the air gun when needs wash, can the servo passageway of backwash, avoids the dust to block up, has simplified follow-up abluent step.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment still is equipped with the second solenoid valve on the valve body, and the output setting of second solenoid valve is between input port and working channel, and intercommunication or disconnection between second solenoid valve control input port and the working channel, the second solenoid valve is convenient for adjust as the switch, plays the effect of protection pressure regulator.

According to the utility model discloses small-size guide's formula gas automatically controlled valve, pressure regulator's output setting forms pressure feedback system between second delivery outlet and air outlet channel, the output pressure of direct control second delivery outlet to the output pressure of the first delivery outlet of indirect control redesigns runner and pressure distribution mode, when guaranteeing original regulatory function, reduces whole volume.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment, the passageway of input port, first delivery outlet and second delivery outlet is the damping hole, guarantees rational in infrastructure.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment, proportional valve detachably set up on the valve body, and the proportional valve often receives the impact, damages easily, and detachable sets up the convenient adjustment in time and changes.

According to the utility model discloses small-size guide's formula gas automatically controlled valve, proportional valve include support, valve rod and diaphragm, and support detachably sets up on the valve body, and the valve rod sets up on the support, and the diaphragm contacts with the one end of valve rod, and the motion of output drive diaphragm in medium chamber, diaphragm drive valve rod motion make the transmission of motion more accurate, more stable as output element through the diaphragm.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment is equipped with reset spring between valve rod and the support, and the normal close sets up safelyr.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment, the other end of valve rod is equipped with the ball valve, and valve rod drive ball valve motion, the intercommunication state between working channel and the air outlet channel is adjusted to the ball valve, adjusts the intercommunication state through valve rod and ball valve, and the structure is compacter.

According to the utility model discloses small-size guide's formula gas automatically controlled valve of first aspect embodiment, seal assembly include damping screw and sealing washer, and damping screw detachably sets up on the valve body, all is equipped with the sealing washer on damping screw's top and the end, need not disassemble maintenance or change completely, and only need align damping screw to wash, and only need dismantle a damping screw and just can change.

According to the utility model discloses small-size guide's formula gas automatically controlled valve, pressure regulator are electric regulator, and atmospheric pressure size is stable, can not diminish with the change of time and grow, ensures that the firepower size of gas equipment is stable.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is an enlarged view at C in fig. 2.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, a small-sized pilot-operated gas electric control valve comprises a valve body 10, wherein the valve body 10 comprises an air inlet channel 11, an air outlet channel 12 and a working channel 13, and the working channel 13 is respectively communicated with the air inlet channel 11 and the air outlet channel 12; the first electromagnetic valve 20 is arranged on the valve body 10, controls the connection or disconnection between the air inlet channel 11 and the working channel 13 and plays a role of a switch; the proportional valve 30 is arranged on the valve body 10, adjusts the communication state between the working channel 13 and the air outlet channel 12, and changes the air pressure of the output air by controlling the flow area of the tube pass; the medium cavity 36 is arranged on the valve body 10, the medium cavity 36 is connected with the input end of the proportional valve 30, the servo channel 40 is arranged on the valve body 10, the servo channel 40 comprises an input port 41, a first output port 42 and a second output port 43, the input port 41 is communicated with the working channel 13, the first output port 42 is communicated with the medium cavity 36, and the second output port 43 is communicated with the air outlet channel 12; a pressure regulator 60 disposed between the servo channel 40 and the air outlet channel 12, controlling the output pressure of the first output port 42, thereby regulating the output of the proportional valve 30; the sealing assembly 50 is detachably arranged on the valve body 10, a cleaning channel 51 is arranged in the sealing assembly 50, the upper end of the cleaning channel 51 is positioned at the top of the sealing assembly 50, and the lower end of the cleaning channel 51 is communicated with the servo channel 40. The small-sized pilot-operated gas electric control valve reduces the volume of the whole valve body 10 by redesigning the servo channel 40, keeps the original adjusting function and saves the manufacturing cost; further, when the flow channel is designed, the cleaning channel 51 is additionally arranged, the upper end of the cleaning channel 51 is arranged on the surface of the valve body 10, when cleaning is needed, the servo channel 40 can be backwashed only by aligning the air gun to the upper end of the cleaning channel 51, dust blockage is avoided, and subsequent cleaning steps are simplified.

In this embodiment, a second solenoid valve 70 is further mounted on the valve body 10, an output end of the second solenoid valve 70 is disposed between the input port 41 and the working channel 13, the second solenoid valve 70 controls the connection or disconnection between the input port 41 and the working channel 13, and the second solenoid valve 70 serves as a switch for facilitating adjustment and functions to protect the pressure regulator 60.

In this embodiment, the output end of the pressure regulator 60 acts between the second output port 43 and the air outlet channel 12 to form a pressure feedback system, which directly controls the output pressure of the second output port 43, thereby indirectly controlling the output pressure of the first output port 42, redesigning the flow channel and the pressure distribution mode thereof, and reducing the overall volume while ensuring the original regulation function. Preferably, the passages of the input port 41, the first output port 42 and the second output port 43 are all damping holes, so that the structure is reasonable.

In this embodiment, the proportional valve 30 is detachably mounted on the valve body 10 through a threaded connection, the proportional valve 30 is often impacted and easily damaged, and the detachable arrangement is convenient to adjust and replace in time. The proportional valve 30 includes a support 32, a stem 31 and a diaphragm 35, the support 32 is detachably disposed on the valve body 10 as a carrier mounted on the valve body 10, and simultaneously carries the stem 31, one end of the stem 31 is in contact with the diaphragm 35, and the output pressure of the medium chamber is changed by the change of the output pressure of the first output port 42, so that the output end of the medium chamber drives the diaphragm 35 to move, the diaphragm 35 lifts or lowers the stem 31, thereby changing the tube-pass flow area, and the output element is more stable by the diaphragm 35, and the transmission of mechanical movement is more accurate. Preferably, the other end of the valve rod 31 passes through the bracket 32 and then is provided with a ball valve 33, the ball valve 33 adjusts the communication state between the working channel 13 and the air outlet channel 12 to be used as a carrier for changing the flow area of the tube pass, and the communication state is adjusted through the valve rod 31 and the ball valve 33, so that the structure is more compact. Be equipped with reset spring 34 between valve rod 31 and the support 32, the setting of ball valve 33 normal close is safer, and the trouble meeting self-closing valve has taken place when air supply or power, cuts off the gas circuit, prevents that the gas from revealing, adds a safety guarantee for the user.

In this embodiment, the sealing assembly 50 includes a damping screw and a sealing ring, the damping screw is detachably disposed on the valve body 10, the sealing ring is disposed on the top and the end of the damping screw, the sealing effect is ensured, and only one damping screw needs to be detached for cleaning.

In the present embodiment, the pressure regulator 60 is an electric regulator, and when the current is adjusted to a high level, the pressure at the output end is kept stable, and the gas pressure value does not become large or small with time, thereby ensuring that the heating power of the gas appliance is stable.

When the small-sized pilot-operated gas electric control valve is used specifically, gas enters from the gas inlet channel 11, when the first electromagnetic valve 20 is electrified, the gas enters the working channel 13, at the moment, the proportional valve 30 and the second electromagnetic valve 70 are in a closed state, and the gas stays in the working channel 13 and cannot flow into the servo channel 40 or flow out of the gas outlet channel 12; when the second electromagnetic valve 70 is electrified, the working channel 13 is communicated with the servo channel 40, the servo loop is opened, and the fuel gas is shunted to the first output port 42 and the second output port 43 from the input port 41; the first output port 42 directly utilizes gas to act on the diaphragm 35 through the medium cavity, the diaphragm 35 drives the valve rod 31 of the proportional valve 30 to move, the second output port 43 passes through the flow channel and then goes to the pressure regulator 60, and after the pressure regulator 60 is powered on, the gas of the second output port 43 reaches the gas outlet channel 12 through the pressure regulator 60.

When the pressure regulator 60 is specifically adjusted, the air pressure of the second output port 43 is directly adjusted by adjusting the current of the pressure regulator 60, so that the air pressure diverted to the first output port 42 can be indirectly adjusted, the opening size of the proportional valve 30 is further controlled by the air pressure value, when the opening of the proportional valve 30 is large, the pressure of the air outlet channel 12 is larger, and when the opening of the proportional valve 30 is smaller, the pressure of the air outlet channel 12 is smaller. If it is desired to reduce the pressure in outlet channel 12, the current flowing through pressure regulator 60 is reduced, and the opening degree of pressure regulator 60 is increased, and the output pressure of second output port 43 is increased, so that the output pressure of first output port 42 is reduced, that is, the pressure at medium chamber 36 is reduced, the force of diaphragm 35 lifting up valve rod 31 is reduced, the opening of proportional valve 30 is reduced, and the output pressure is reduced; when it is desired to increase the pressure in outlet channel 12, the current flowing through pressure regulator 60 is increased, and the opening degree of pressure regulator 60 becomes smaller, and the output pressure of second output port 43 becomes smaller, so that the output pressure of first output port 42 increases, that is, the pressure at medium chamber 36 increases, the force of diaphragm 35 lifting up valve stem 31 increases, the opening of proportional valve 30 becomes larger, and the output pressure becomes higher.

In the whole air passage system, the air passages on the first output port 42 and the second output port 43 are damping holes, particularly the second output port 43 is the smallest flow passage, and a plurality of 'corners', which are the places where dust is most easily blocked, exist, if the positions are blocked, an air gun is aligned to the cleaning passage 51 to dredge the dust in the inner part, if the blockage is serious, a screwdriver is used for detaching the damping screw, the cleaning is further carried out, and then the damping screw is installed on the valve body 10 again. This structure is simple and quick, and does not require disassembly of the entire valve body 10. Compared with the prior art, the damping device has the advantages that the damping block is omitted, and other excessive channels such as a cleaning channel and a clean channel do not need to be divided, so that the structure is more compact, and the cleaning is more convenient.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A small-size guide formula gas automatically controlled valve which characterized in that includes:

the valve body comprises an air inlet channel, an air outlet channel and a working channel positioned between the air inlet channel and the air outlet channel;

the first electromagnetic valve is arranged on the valve body and controls the connection or disconnection between the air inlet channel and the working channel;

the proportional valve is arranged on the valve body and used for adjusting the communication state between the working channel and the air outlet channel;

the medium cavity is arranged on the valve body and is connected with the input end of the proportional valve;

the servo channel is arranged on the valve body and comprises an input port, a first output port and a second output port, the input port is communicated with the working channel, the first output port is communicated with the medium cavity, and the second output port is communicated with the air outlet channel;

the pressure regulator is arranged on the valve body, and the output end of the pressure regulator is arranged between the servo channel and the air outlet channel and used for controlling the output pressure of the first output port;

the sealing assembly is detachably arranged on the valve body, a cleaning channel is arranged in the sealing assembly, the upper end of the cleaning channel is located at the top of the sealing assembly, and the lower end of the cleaning channel is communicated with the servo channel.

2. The small pilot-operated gas electric control valve according to claim 1, characterized in that: the valve body is also provided with a second electromagnetic valve, the output end of the second electromagnetic valve is arranged between the input port and the working channel, and the second electromagnetic valve controls the connection or disconnection between the input port and the working channel.

3. The small pilot-operated gas electric control valve according to claim 2, characterized in that: the output end of the pressure regulator is arranged between the second output port and the air outlet channel to form a pressure feedback system, and the output pressure of the second output port is directly controlled, so that the output pressure of the first output port is indirectly controlled.

4. The small pilot-operated gas electric control valve according to claim 3, characterized in that: the channels of the input port, the first output port and the second output port are all damping holes.

5. The small pilot-operated gas electric control valve according to claim 1, characterized in that: the proportional valve is detachably arranged on the valve body.

6. The small pilot-operated gas electric control valve according to claim 5, characterized in that: proportional valve includes support, valve rod and diaphragm, support detachably sets up on the valve body, the valve rod sets up on the support, the diaphragm with the one end contact of valve rod, the output drive in medium chamber the diaphragm motion, the diaphragm drive the valve rod motion.

7. The small pilot-operated gas electric control valve according to claim 6, characterized in that: and a return spring is arranged between the valve rod and the support.

8. The small pilot-operated gas electric control valve according to claim 6, characterized in that: the other end of the valve rod is provided with a ball valve, the valve rod drives the ball valve to move, and the ball valve adjusts the communication state between the working channel and the air outlet channel.

9. The small pilot-operated gas electric control valve according to claim 1, characterized in that: the sealing assembly comprises a damping screw and a sealing ring, the damping screw is detachably arranged on the valve body, and the sealing ring is arranged at the top and the tail end of the damping screw.

10. The small pilot-operated gas electric control valve according to claim 1, characterized in that: the pressure regulator is an electric regulator.