CN201236990Y - Thin gas proportion valve - Google Patents

Abstract

The utility model relates to a thin gas proportional valve, which comprises a valve body, a first-stage solenoid valve, a second-stage solenoid valve and a proportional valve. The first-stage solenoid valve, the second-stage solenoid valve and the proportional valve are fixedly installed on the valve On the body; the second-stage solenoid valve and the proportional valve are located on one side of the first-stage solenoid valve, and the second-stage solenoid valve and the first-stage solenoid valve are placed opposite to each other. The thin gas proportional valve is reasonable and compact in structure, thin in thickness; the diameter of the valve port and channel is large, and the hot water production rate is high; it adopts a two-stage solenoid valve structure, double insurance, good sealing performance, safe and reliable. In summary, the thin gas proportional valve can be well applied to ultra-thin gas water heaters.

Description

Thin Gas Proportional Valve

technical field

The utility model relates to a valve tool for gas, in particular to a thin gas proportional valve.

Background technique

Proportional control technology is a technical means to realize the linear relationship between the controlled quantity (output) and the controlled quantity (input or instruction) of a component or system. By relying on this method, it is necessary to ensure that the output quantity follows the input quantity according to a certain ratio. change with change.

The rapid development of proportional technology and the continuous improvement of the performance of proportional components provide a reliable technical basis for the transformation of traditional servo systems, and have been successfully applied to some equipment. In the industrial field, many users have put forward the requirement of using proportional components instead of servo components due to the difficulty and high cost of servo system maintenance.

The gas inlet pressure of today's water heaters is actually not constant, which will lead to changes in the gas outlet pressure, and the combustion conditions cannot reach a stable state. The water heater cannot be kept at a constant temperature, and the water temperature will fluctuate. The outlet pressure stabilizes the gas outlet pressure and keeps the water temperature stable.

However, the gas proportional valves of the dual solenoid valves currently on the market all have large diameters and large thicknesses, and thinner diameters have small diameters. A gas proportional valve with a large thickness cannot meet the volume requirement of an ultra-thin gas water heater, while a gas proportional valve with a thin thickness cannot meet the hot water production rate requirement of an ultra-thin gas water heater.

Contents of the invention

In order to overcome the shortcomings of the prior art above, the utility model provides a thin gas proportional valve with reasonable and compact structure, thin thickness, safety and reliability.

The purpose of this utility model is achieved through the following technical solutions: This thin gas proportional valve includes a valve body, a first-stage solenoid valve, a second-stage solenoid valve and a proportional valve, and is characterized in that: the first-stage solenoid valve, the second-stage solenoid valve The second-stage solenoid valve and proportional valve are fixedly installed on the valve body; the second-stage solenoid valve and proportional valve are located on one side of the first-stage solenoid valve, and the second-stage solenoid valve and the first-stage solenoid valve are placed opposite to each other.

The proportional valve is located directly above the first-stage solenoid valve; both the first-stage solenoid valve and the second-stage solenoid valve include a sealing assembly, the sealing assembly of the first-stage solenoid valve cooperates with a valve port of the valve body, and the second-stage solenoid valve The sealing assembly of the solenoid valve cooperates with the other valve port of the valve body.

The two valve ports are both core-pulling valve ports, and the channel connecting one valve port to the other valve port is a process core-pulling channel.

The channel is sealed with a stainless steel plug.

The proportional valve includes a magnetic core, a proportional coil, a permanent magnet, an upper cover, a lower cover, a diaphragm and a ball valve, the permanent magnet is fixedly connected to the ball valve, and the proportional coil and the magnetic core are located above the permanent magnet.

A sealing gasket is provided at the connection between the first stage electromagnetic valve and the valve body, and a sealing gasket is provided at the connection between the second stage electromagnetic valve and the valve body.

The proportional valve is connected with patch cords.

The valve body is connected with the intake joint.

The proportional valve is connected with the air outlet joint.

The connection between the valve body and the intake joint is provided with an "O"-shaped sealing ring and a filter screen.

Compared with the prior art, the utility model has the following advantages: the thin gas proportional valve provided by the utility model improves the structure of the existing gas proportional valve, and can achieve the following effects:

1. The structure is reasonable and compact, and the thickness is thin: the structure is newly arranged, and the thickness can be 58.5mm when equipped with a two-stage solenoid valve and a proportional valve, which is more than 15mm thinner than the gas proportional valve with the same function;

2. The diameter of the valve port and channel is large: the valve port and channel adopt core-pulling technology, with a diameter of φ22mm, which can be used for high-power ultra-thin gas water heaters and wall-hung boilers;

3. Adopt two-stage solenoid valve structure, double insurance, good sealing performance, safe and reliable.

In summary, the thin gas proportional valve can be well applied to ultra-thin gas water heaters.

Description of drawings

Fig. 1 is a structural schematic diagram of a thin gas proportional valve of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, a thin gas proportional valve includes a valve body 1, a first-stage solenoid valve 2, a second-stage solenoid valve 3 and a proportional valve 4, a first-stage solenoid valve 2, a second-stage solenoid valve 3 and The proportional valve 4 is fixedly installed on the valve body 1, the first-stage solenoid valve 2 is on the lower left of the valve body 1, the second-stage solenoid valve 3 is on the upper right of the valve body 1, the second-stage solenoid valve 2 and the first-stage solenoid The valve 1 is placed opposite to each other, and the proportional valve 4 is directly above the first-stage solenoid valve 2. The first-stage electromagnetic valve 2 and the second-stage electromagnetic valve 3 include a sealing assembly, the sealing assembly of the first-stage electromagnetic valve 2 cooperates with a valve port 101 of the valve body 1, and the sealing assembly of the second-stage electromagnetic valve 3 and the valve body 1 The other valve port 102 cooperates, and the first-stage solenoid valve 2 and the second-stage solenoid valve 3 open or close the valve port 101 and the valve port 102 according to the electrical signal of the controller.

One valve port 101 is a core-pulling valve port, and the other valve port 102 is also a core-pulling valve port. The channel 5 connecting one valve port 101 to the other valve port 102 is a process core-pulling channel, and the channel 5 is provided with a stainless steel plug 6 seal.

Proportional valve 4 comprises magnetic core 401, proportional coil 402, permanent magnet 403, upper cover 404, lower cover 405, diaphragm 406 and ball valve 407, permanent magnet 403 is fixedly connected with ball valve 407, proportional coil 402 and magnetic core 401 are positioned at permanent magnet 403 above.

A gasket 9 is provided at the joint between the first stage solenoid valve 2 and the valve body 1 , and a gasket 9 is provided at the junction between the second stage solenoid valve 3 and the valve body 1 . The proportional valve 4 is connected with a patch cord 10 . The valve body 1 is connected with the air inlet joint 11, and the proportional valve 4 is connected with the air outlet joint. An O-ring 12 and a filter screen 13 are provided at the connection between the valve body 1 and the intake joint 11 .

The air flow direction of the thin gas proportional valve: as shown in Figure 2, the first-stage solenoid valve 2 and the second-stage solenoid valve 3 are closed, and the electric signal of the controller opens the first-stage solenoid valve 2 and the second-stage solenoid valve. Stage solenoid valve 3, proportional coil 402 controls ball valve 407 to open. The gas enters from ①, then into ② and ③, and then enters from ④ to ⑤ of the proportional valve 4 from the valve port 102, and finally the gas flows into and out of the gas joint.

The adjustment process of the proportional valve 4: when the proportional coil 402 receives the control current, an electromagnetic field with the same polarity as that of the upper end surface of the permanent magnet 403 is generated on the lower end surface of the magnetic core 401. The permanent magnet 403 and the ball valve 407 move down to form a corresponding opening with the ball valve port. When the current increases, the magnetic field of the magnetic core 401 increases accordingly, the force to push away the permanent magnet 403 increases, and the opening of the ball valve port increases; when the current decreases, the magnetic field of the magnetic core 401 decreases correspondingly, the force to push away the permanent magnet 403 decreases, and the ball valve opens. Mouth opening decreases. In this way, the controller can automatically adjust the current through the water temperature feedback signal to realize automatic control of the gas flow. It comes with a precise proportional adjustment system, which truly achieves stepless adjustment and can instantly adjust the required gas flow, so as to achieve the purpose of regulating and stabilizing the water temperature. .

When the proportional coil 402 is powered off, the electromagnetic force disappears, and the permanent magnetic force makes the permanent magnet 403 attract to the magnetic core 401, and the ball valve 407 moves upward to close the ball valve port; Constant tension makes the ball valve 407 have a sealing effect.

Voltage stabilization process of proportional valve 4: When the current is determined according to the set temperature value, the magnetic field force can be regarded as a constant force. When the gas input pressure rises, the force on diaphragm 406 increases and moves upwards, which reduces the opening of the ball valve and reduces the gas output pressure; when the gas input pressure decreases, the force on diaphragm 406 decreases and moves downward, making The opening of the ball valve port increases to increase the gas output pressure. In this way, the stability of the gas output pressure is ensured, and the combustion condition is always maintained at the desired state.

The specific implementation described above is a preferred embodiment of the utility model, and cannot limit the claims of the utility model. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the utility model include Within the protection scope of the present utility model.

Claims (10)

1. Thin gas proportional valve, including valve body, first-stage solenoid valve, second-stage solenoid valve and proportional valve, characterized in that: the first-stage solenoid valve, second-stage solenoid valve and proportional valve are fixedly installed on the valve On the body; the second-stage solenoid valve and the proportional valve are located on one side of the first-stage solenoid valve, and the second-stage solenoid valve and the first-stage solenoid valve are placed opposite to each other. 2. The thin gas proportional valve according to claim 1, characterized in that: the proportional valve is located directly above the first-stage solenoid valve; both the first-stage solenoid valve and the second-stage solenoid valve include sealing components, the first stage The sealing assembly of the first-stage solenoid valve cooperates with one valve port of the valve body, and the sealing assembly of the second-stage electromagnetic valve cooperates with the other valve port of the valve body. 3. The thin gas proportional valve according to claim 2, characterized in that: the two valve ports are core-pulling valve ports, and the channel connecting one valve port to the other valve port is a process core-pulling channel. 4. The thin gas proportional valve according to claim 3, characterized in that: said channel is sealed with a stainless steel plug. 5. The thin gas proportional valve according to claim 1, characterized in that: the proportional valve includes a magnetic core, a proportional coil, a permanent magnet, an upper cover, a lower cover, a diaphragm and a ball valve, and the permanent magnet is fixedly connected to the ball valve. The proportional coil and magnetic core are located above the permanent magnet. 6. The thin gas proportional valve according to claim 1, characterized in that: a gasket is provided at the connection between the first-stage solenoid valve and the valve body, and a gasket is provided at the connection between the second-stage solenoid valve and the valve body. 7. The thin gas proportional valve according to claim 1, characterized in that: said proportional valve is connected with a patch cord. 8. The thin gas proportional valve according to claim 1, characterized in that: the valve body is connected to the inlet joint. 9. The thin gas proportional valve according to claim 1, characterized in that: the proportional valve is connected to the gas outlet joint. 10. The thin gas proportional valve according to claim 8, characterized in that: an "O"-shaped sealing ring and a filter screen are provided at the connection between the valve body and the inlet joint.

Images