WO2011097790A1

WO2011097790A1 - Water-gas linkage valve

Info

Publication number: WO2011097790A1
Application number: PCT/CN2010/070571
Authority: WO
Inventors: 叶远璋; 钟家淞; 余国保
Original assignee: 广东万和新电气股份有限公司
Priority date: 2010-02-09
Filing date: 2010-02-09
Publication date: 2011-08-18
Also published as: CN102725592A; CN102725592B; UA105828C2; MX338756B; MX2012008192A

Abstract

A water-gas linkage valve includes a water valve body assembly (1) with a high pressure water chamber (121), a gas valve body assembly (2), a linkage assembly (3) for connecting the gas valve assembly (2) with the water valve body assembly (1), and a low pressure water chamber (122). A gas outlet (32) is provided in the linkage assembly (3). The low pressure water chamber (122) is connected with the high pressure water chamber (121) by a venturitube (13). The low pressure water chamber (122) is provided in the water valve body assembly (1). A pressure transmission unit is formed when the water valve body assembly (1) is connected with the linkage assembly (3). The pressure transmission unit is isolated from the high pressure water chamber (121) and the low pressure water chamber (122) by a diaphragm (131,132). The linkage assembly (3) is controlled by the water valve body assembly (1) based on the change of the pressure difference between the high pressure water chamber (121) and the low pressure water chamber (122), and then the linkage assembly (3) controls the open and close of the gas in the gas valve body assembly (2). Since the high and low pressure water chambers (121,122) are isolated from the linkage assembly (3) by the diaphragm (131,132), it avoids the water directly touching with the metal parts of the linkage assembly and effectively prevents sediment incrustation and corrosion.

Description

Water gas linkage valve

Technical field

The invention relates to a water-gas linkage valve, in particular to a water-gas linkage valve for preventing fouling and rusting inside a valve body in a gas water heater. Background technique

In the process of using the gas water heater, the water valve is used to control the air valve. When the water valve is opened, the control valve is opened, and when the water valve is closed, the control valve is closed, thereby realizing the synchronous switch of the bath water and the gas, that is, the water and gas linkage. .

Referring to Figure 1, is a cross-sectional view of a water gas linkage valve in an existing gas water heater. The water valve body assembly of the water-gas linkage valve includes a high-pressure water chamber 12, and the water valve body assembly 1, and the linkage assembly 3, are connected to form a low-pressure water chamber 14, a high-pressure water chamber 12, and a low-pressure water chamber 14, The differential small shaft 31, which is separated from the interlocking component 3 by the differential pressure disc diaphragm 13, is located in the low pressure water chamber 14, on the side center line, and the end of the small shaft 31 is engaged with the diaphragm rubber seat 15, the diaphragm rubber The seat 15, the top pressure differential disc diaphragm 13, and the other end of the linkage small shaft 31, bear against the sealing seat 22 of the gas valve body assembly 2.

When the water flows from the water inlet 11 into the pipe of the water valve body assembly 1, it first enters the high pressure water chamber 12, passes through the high pressure water chamber 12, flows out, flows into the venturi 16, and finally enters the heat exchange. Inside the device. When the water flows through the venturi 16, the pressure of the water flow at the throat 161 of the venturi 16, (i.e., the small diameter portion) is lowered (in Fig. 1, the solid arrow indicates the flow direction of the water flow), and the low pressure water chamber 14 The water in the venturi tube 16, the pressure of the throat 161, is transmitted through the pressure transmitting tube 17, and the pressure of the throat 161 is transferred to the pressure water chamber 14. At this time, the pressure of the high pressure water chamber 12 is greater than the low pressure water chamber 14, and the high pressure water pushes the differential pressure disc diaphragm 13 to move in the direction of the low pressure water chamber 14, and then pushes the linkage small shaft 31 to the sealing sley 22, The direction is moved to open the sealing seat 22' so that the gas at the gas inlet 21 enters the burner device to achieve heating. When the water valve is closed, the water flow no longer enters the high pressure water chamber 12, the high pressure water chamber 12, the medium pressure is gradually reduced to the same pressure as the low pressure water chamber 14, the differential pressure disc diaphragm 13, the fall, the valve inner and outer springs 23 , reset, and tightly seal the sealing seat 22, so as to block the entry of gas into the burner device and prevent dry burning.

Since the water-gas interlocking valve is in use, the high-pressure water chamber 12 and the low-pressure water chamber 14 are filled with water, and one end of the interlocking small shaft 31 located in the low-pressure water chamber 14, and the sealing nut 32 are immersed in the water. Therefore, the water-gas linkage valve is prone to failure in an environment with poor water quality for a long time. When the water quality of the bath water is hard and contains a large amount of suspended matter or colloid, the low-pressure water chamber 14 is likely to form scale. In particular, the interlocking small shaft 31 and the sealing nut 32 are easily blocked by the scale; when the bath water is dissolved with a relatively high concentration of inorganic salt electrolyte (Na ⁺ , Cl_, sulfate, etc.) and oxygen, the small shaft 31 is interlocked. It is easy to be rusted with the sealing nut 32. Under the action of scale and rust alone, after the water-gas linkage valve is prone to use for a period of time, the small shaft 31 is linked in the water-gas linkage valve, the operation is not smooth or even completely reset, so that the water-gas linkage valve cannot be completely closed, and the gas remains It can enter the burner unit and continue to burn, causing the burner unit to dry and damage the gas water heater, posing a hazard. Summary of the invention

In order to overcome the problem that the gas valve in the water-gas linkage valve cannot be normally closed due to fouling and rust, the technical proposal of the invention provides a water-gas linkage valve, which effectively solves the water and gas caused by fouling and corrosion. The problem that the linkage valve cannot be closed normally prevents the dry gas from damaging the gas water heater and increases the safety performance of the gas water heater.

In order to solve the above technical problem, the present invention provides a water-gas linkage valve, including:

a water valve body assembly having a high pressure water chamber;

Gas valve body assembly;

a linkage assembly connecting the gas valve body assembly and the water valve body assembly, wherein the linkage assembly is provided with a gas outlet;

Low pressure water chamber;

The low pressure water chamber communicates with the high pressure water chamber through a venturi, and is characterized by:

The low pressure water chamber is disposed in the water valve body assembly,

The water valve body assembly is coupled to the linkage assembly to form a pressure transmitting device, The pressure transmitting device is separated from the high pressure water chamber and the low pressure water chamber by a diaphragm, and the water wide body assembly controls the linkage assembly by a pressure difference change between the high pressure water chamber and the low pressure water chamber, The linkage assembly then controls the opening and closing of the gas in the gas valve body assembly.

The invention isolates the high and low pressure water chamber from the linkage assembly by using the diaphragm, avoids the direct contact between the water and the metal component in the linkage assembly, effectively prevents the scale and rust phenomenon in the linkage assembly, and solves the problem that the water gas linkage valve cannot be solved. The problem of normal closing, preventing dry burning and damaging the gas water heater, increases the safety performance of the gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a water gas linkage valve in a conventional gas water heater;

2 is a schematic perspective structural view of a water-gas interlocking valve according to Embodiment 1 of the present invention;

Figure 3 is a 1/4 cross-sectional view of Figure 2;

Figure 4 is a cross-sectional view of Figure 2;

Figure 5 is an exploded view of the gas valve body assembly and the linkage assembly of Figure 2;

Figure 6 is an exploded view of the water valve body assembly of Figure 2;

Fig. 7 is a cross-sectional view showing a water-gas interlocking valve according to a second embodiment of the present invention. Reference mark comparison table:

Γ——Water valve body assembly; T——Gas wide body assembly; 3'——Linking component;

11, water inlet; 12, - high pressure water chamber; 13, - differential pressure disc diaphragm;

14' - low pressure water chamber; 15, - diaphragm rubber seat 16, - venturi tube; 17, one pressure tube; 21 '- gas inlet; 22' - sealed seat; 23 '- - valve inner and outer springs; 31, - linkage small shaft; 32' - sealing nut; 16 Γ - throat;

I——water valve body assembly; 2——gas valve body assembly; 3——linkage component;

I I water inlet; 12 one pressure tube; 13 - venturi tube;

14 fixed shaft; 15 - lever; 16 - atmospheric communication hole;

17 oil hole; 18 - sealing cap; 19 venturi throat;

I I I——water flow stabilizer; 112--low pressure water chamber return spring; 121——high pressure water chamber; 122--low pressure water chamber;

131 - first diaphragm; 132 - - second diaphragm; 141 - a first air cavity; 142 a second air cavity;

151 first diaphragm capsule; 152 second diaphragm capsule;

161 first push block; 162 second push block;

171 first oil chamber; 172 second oil chamber;

21 gas inlet; 22 valve inner spring; 23 valve outer spring;

24 a sealed sley; 25 gas valve seal 圏; 26 —— connect seal 圏;

31 — linkage small shaft; 32 gas outlet; 33 connecting flange;

34 sealing spring; 35 open stop; 36 limit nut;

37 sealed spring seat; 38 small shaft seal 圏.

detailed description

The invention will now be further described with reference to the drawings and embodiments.

As shown in Fig. 2, the water-gas linkage valve includes: a water valve body assembly 1, a gas valve body assembly 2, and a linkage assembly 3 for connecting the gas valve body assembly 2 and the water valve body assembly 1. Referring again to Figures 3 and 4, the linkage assembly 3 is provided with a gas outlet 32. The water valve body assembly 1 includes a high pressure water chamber 121. The water valve body assembly 1 further includes a low pressure water chamber 122 through which the low pressure water chamber 122 passes. The water valve body assembly 1 is connected to the high-pressure water chamber 121, and the water valve body assembly 1 is connected with the linkage assembly 3 to form a pressure transmission device. The pressure transmission device is separated from the high-pressure water chamber 121 and the low-pressure water chamber 122 through the diaphragm, and the water valve body assembly 1 passes through the high-pressure water. The pressure difference between the chamber 121 and the low pressure water chamber 122 changes to control the linkage assembly 3, and the linkage assembly 3 controls the opening and closing of the gas in the gas valve body assembly 2.

The solid arrows in Figure 4 indicate the direction of water flow. After the water flows into the high pressure water chamber 121, it flows into the heat exchanger through the venturi tube 13. Wherein, when the water flows through the venturi 13, the pressure of the water flow at the throat 19 (i.e., the small diameter portion) of the venturi 13 is lowered, and the water in the low pressure water chamber 122 is taken at the throat 19 of the venturi 13 The pressure is transmitted through the pressure transmitting tube 12 to the low pressure water chamber 122. The pressure transmitting device transmits the high pressure of the high pressure water chamber 121 to the vicinity of the low pressure water chamber 122. At this time, the water valve body assembly 1 pushes the interlocking small shaft 31 of the linkage assembly 3 along the low pressure direction near the high pressure water chamber 121, and the linkage assembly 3 is controlled. The gas valve body assembly 2 is opened to allow gas to flow out into the gas outlet 32 for delivery to an external burner unit. When the water valve body assembly 1 is closed, the water flow no longer flows through the high pressure water chamber 121. At this time, the water in the high pressure water chamber 121 is stationary, and the pressure in the high pressure water chamber 121 is in phase with the pressure in the low pressure water chamber 122. Then, the interlocking small shaft 31 in the interlocking assembly 3 is reset, thereby controlling the gas valve assembly 2 to close, and cutting off the outflow of the gas.

The invention separates the high and low pressure water chamber from the pressure transmission device by using the diaphragm, avoids direct contact between the water and the metal parts in the linkage assembly, effectively prevents the scale and rust phenomenon, and solves the problem that the water gas linkage valve cannot be normally closed. , to prevent dry burning and damage gas water heaters, and increase the safety performance of gas water heaters.

A preferred embodiment of the invention is:

The diaphragm includes a first diaphragm 131 and a second diaphragm 132. The pressure transmitting device includes: a first air chamber 141 separated from the high pressure water chamber 121 by a first diaphragm 131, and a first push block 151 is disposed in the first air chamber 141, a push block 161 abuts against the first diaphragm 131, the first push block 161 is connected to one end of the linkage small shaft 31 of the linkage assembly, and the other end of the linkage small shaft 31 is connected to the sealing seat 24 of the gas valve body assembly 2; a second air chamber 142 is disposed in the second air chamber 142 by the second diaphragm 132. The second air block 142 is disposed on the second diaphragm 132. The first air chamber The first air block 161 and the second push block 162 are connected by a lever 15 . When the water valve is opened, the water flows into the high pressure water chamber 121, at which time the pressure of the high pressure water chamber 121 is greater than the pressure in the pressure water chamber 122, and the pressure in the high pressure water chamber 121 is transmitted to the first push through the first diaphragm 131. Block 161, the pressure in the low pressure water chamber 122 is transmitted to the second push block 162 through the second diaphragm 132. Since the first push block 161 and the second push block 162 are connected by the lever 15, the pressure difference causes the lever 15 to be turned over, the high voltage The lever 15 on the water chamber 121 side is turned in the direction of the interlocking small shaft 31, and the lever 15 on the low pressure water chamber 122 side is turned in the direction of the low pressure water chamber 122, and the lever 15 drives the first push block 161 to move in the direction of the interlocking small shaft 31. The first push block 161 pushes the interlocking small shaft 31 again, and the interlocking small shaft 31 controls the gas valve body assembly 2 to open.

When the water valve is closed, the water flow no longer flows into the high pressure water chamber 121, the water in the high pressure water chamber 121 is stationary, and the pressure in the high pressure water chamber 121 gradually decreases to the same pressure as in the low pressure water chamber 122, and the lever 15 is opposite. The direction is reversed and reset to the horizontal position. During the reset of the lever 15, the first push block 161 is retracted, the interlocking small shaft 31 and the air valve seal 圏 25 are reset, and the reset valve seal 圏 25 causes the gas valve body assembly 2 closure.

Since the first diaphragm 131 and the second diaphragm 132 completely separate the water from the metal parts such as the interlocking small shaft 31, The lever is used to transmit high and low pressure, effectively avoiding the influence of fouling and rust on the metal parts such as the linkage small shaft, so that the linkage small shaft 31 can be normally reset, thereby ensuring the safety of the gas water heater.

In the embodiment of the present invention, the lever 15 is fixed to the penetration of the first air chamber 141 and the second air chamber 142 by the fixed shaft 14. When the lever 15 is turned over, the fixed shaft 14 is the center of rotation.

In the embodiment of the present invention, the first diaphragm 131 and the second diaphragm 132 are disposed at a joint between the linkage assembly 3 and the water valve body assembly 1, and the first air chamber 141 is formed between the linkage assembly 3 and the first diaphragm 131. A second air cavity 142 is formed between the assembly 3 and the second diaphragm 132.

In the embodiment of the present invention, the first air chamber 141 and/or the second air chamber 142 are provided with an atmosphere communication hole 16. The first air chamber 141 and the second air chamber 142 communicate with the outside atmosphere through the atmosphere communication hole 16, and the atmosphere communication hole 16 may be one or more.

In the embodiment of the present invention, as shown in FIG. 6, the first air chamber 141 is further provided with a first diaphragm capsule seat 151, and the first diaphragm 131 is in close contact with the first diaphragm capsule seat 151, and the first diaphragm capsule seat 151 is connected to the first push block 161; the low pressure water chamber 122 is further provided with a low pressure water chamber return spring 112, and the second air chamber 142 is further provided with a second diaphragm capsule seat 152, a low pressure water chamber return spring 112 and a second The diaphragm 132 abuts, the second diaphragm 132 abuts the second diaphragm capsule 152, and the second diaphragm capsule 152 is coupled to the second push block 162. When the pressure in the high pressure water chamber 121 and the pressure difference in the low pressure water chamber 122 are large, the first diaphragm 131 pushes the first diaphragm capsule 151, and the first diaphragm capsule 151 pushes the first push block 161. A water flow stabilizing device 111 is further disposed in the high pressure water chamber 121, and the water flow stabilizing device 111 may be disposed at the first diaphragm 131; or may be disposed at the water inflow port 11. The water flow stabilizing device 111 includes a spring.

In the embodiment of the present invention, as shown in FIG. 5, a sealing valve seat 24 is provided on the side of the sealing seat 24, and the other side of the sealing seat 24 is stepped, and a valve inner spring 22 and an outer valve spring are respectively provided. twenty three. The valve inner spring 22 and the valve outer spring 23 close the sealing seat 24, and the squeeze valve seal 圏 25 ensures a good airtightness between the gas valve and the gas outlet 32. The connection between the gas valve body assembly 2 and the linkage assembly 3 is also provided with a connection seal 圏 26 to prevent gas leakage.

The linkage assembly 3 further includes a small shaft seal jaw 38, a seal spring 34, a seal spring seat 37, an opening stop 35, and a limit nut 36 that are sequentially sleeved outside the linkage small shaft 31. When the interlocking small shaft 31 is reset, the interlocking small shaft 31 is reset by the valve inner spring 22 and the valve outer spring 23, and the opening stopper 35 is stuck tightly. The sealing spring seat 37 causes the sealing spring 34 to press the small shaft sealing jaw 38 to ensure good airtightness between the interlocking small shaft 31 and the linkage assembly 3.

Another preferred embodiment of the invention is:

As shown in FIG. 7, the water-gas interlocking valve includes: the diaphragm includes a first diaphragm 131 and a second diaphragm 132; the pressure transmitting device includes: a first oil chamber 171 separated from the high-pressure water chamber 121 by the first diaphragm 131, the first oil A first diaphragm capsule 151 is disposed in the cavity 171, and the diaphragm capsule 151 abuts against the first diaphragm 131. The first diaphragm capsule 151 is connected to one end of the linkage small shaft 31 of the linkage assembly, and the small shaft 31 is interlocked. The other end is connected to the sealing seat 24 of the gas valve body assembly 2; the second oil chamber 172 is separated from the low pressure water chamber 122 by the second diaphragm 132. The second oil chamber 172 is provided with a second diaphragm capsule 152, The second diaphragm rubber seat 152 abuts against the second diaphragm 132; the first oil chamber 171 and the second oil chamber 172 are interpenetrated and filled with hydraulic oil.

When the water valve is opened, the water flows into the high pressure water chamber 121, at which time the pressure of the high pressure water chamber 121 is greater than the pressure in the low pressure water chamber 122, and the pressure in the high pressure water chamber 121 is transmitted to the first diaphragm glue through the first diaphragm 131. The pressure in the low pressure water chamber 122 is transmitted to the second diaphragm capsule 152 through the second diaphragm 132. Since the first oil chamber 171 and the second oil chamber 172 are filled with hydraulic oil, the first oil chamber 171 and The second oil chamber 172 penetrates, and under the action of the water pressure of the high pressure water chamber 121, the hydraulic oil flows from the first oil chamber 171 to the second oil chamber 172, and the first diaphragm rubber seat 151 moves in the direction of the linkage small shaft 31, A diaphragm rubber seat 151 pushes the linkage small shaft 31 again, and the linkage small shaft 31 controls the gas valve body assembly 2 to open.

When the water valve is closed, the water flow no longer flows into the high pressure water chamber 121, the water in the high pressure water chamber 121 is stationary, and the pressure in the high pressure water chamber 121 gradually decreases to the same pressure as in the low pressure water chamber 122, and the small shaft 31 is interlocked. The valve seal 25 is then reset, and the valve seal 25 after reset causes the gas valve body assembly 2 to close.

Since the first diaphragm 131 and the second diaphragm 132 completely separate the water from the metal parts such as the linkage small shaft 31, and use the hydraulic oil to transmit the high and low pressures, the metal parts such as the linkage small shaft are effectively prevented from being affected by the scale and rust. , the linkage small shaft 31 can be normally reset, thereby closing the gas valve body assembly 2, thereby ensuring the safety of the gas water heater.

In the embodiment of the present invention, the first diaphragm 131 and the second diaphragm 132 are disposed at a joint between the linkage assembly 3 and the water valve body assembly 1, and the first oil chamber 171 is formed between the linkage assembly 3 and the first diaphragm 131. A second oil chamber 172 is formed between the assembly 3 and the second diaphragm 132.

In the embodiment of the present invention, the first oil chamber 171 and/or the second oil chamber 172 are provided with oil holes 17. A sealing cap 18 is provided on the oil hole 17. The oil hole 17 is used to fill and discharge hydraulic oil.

In the embodiment of the present invention, the high-pressure water chamber 121 is further provided with a water flow stabilizing device 111, and the water flow stabilizing device 111 may be disposed at the first diaphragm 131; or may be disposed at the water inlet 11 . The water flow stabilizing device 111 includes a spring. A low pressure water chamber return spring 112 is also disposed in the low pressure water chamber 122, and the low pressure water chamber return spring 112 abuts the second diaphragm 132. The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and principle of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

1. A water-gas linkage valve, comprising:

a water valve body assembly having a high pressure water chamber;

Gas valve body assembly;

Low pressure water chamber;

The low pressure water chamber is disposed in the water valve body assembly,

The water valve body assembly is coupled to the linkage assembly to form a pressure transmitting device,

The pressure transmitting device is separated from the high pressure water chamber and the low pressure water chamber by a diaphragm,

The water valve body assembly controls the linkage assembly by a pressure difference change between the high pressure water chamber and the low pressure water chamber, and the linkage assembly controls the opening and closing of the gas in the gas valve body assembly.

2. The water-gas interlocking valve according to claim 1, wherein

The diaphragm includes a first diaphragm and a second diaphragm;

The pressure transmitting device includes: a first air chamber separated from the high pressure water chamber by the first diaphragm, wherein the first air chamber is provided with a first push block, and the first push block is placed at the On the first diaphragm, the first push block is connected to one end of the linkage small shaft of the linkage assembly, and the other end of the linkage small shaft is connected to the sealing seat of the gas valve body assembly;

a second air chamber separated from the low pressure water chamber by the second diaphragm, a second push block disposed in the second air chamber, the second push block abutting on the second diaphragm;

The first air cavity and the second air cavity are penetrated;

The first push block and the second push block are connected by a lever.

3. The water-gas interlocking valve of claim 2, wherein said first diaphragm and said second a diaphragm disposed at a junction between the linkage assembly and the water valve body assembly, the first air chamber being formed between the linkage assembly and the first diaphragm, the linkage assembly and the second diaphragm The second air cavity is formed between.

The water-gas interlocking valve according to claim 3, wherein the first air chamber and/or the second air chamber are provided with an atmosphere communication hole.

The water-gas interlocking valve according to claim 4, wherein the first air chamber is further provided with a first diaphragm capsule, one side of the first diaphragm capsule and the first a diaphragm abutting, the opposite side of the first diaphragm capsule seat is connected to the first push block;

a low pressure water chamber return spring is further disposed in the low pressure water chamber, and a second diaphragm capsule seat is further disposed in the second air chamber, the low pressure water chamber return spring abutting the second diaphragm, One side of the second diaphragm capsule is abutted against the second diaphragm, and the opposite side of the second diaphragm capsule side is connected to the second push block.

6. The water-gas interlocking valve of claim 1 wherein:

The diaphragm includes a first diaphragm and a second diaphragm;

The pressure transmitting device includes: a first oil chamber separated from the high pressure water chamber by the first diaphragm, a first diaphragm capsule seat disposed in the first oil chamber, the first diaphragm capsule seat Abutting on the first diaphragm, the opposite side of the first diaphragm capsule is connected to one end of the linkage small shaft of the linkage assembly, and the other end of the linkage small shaft is a sealing seat connection of the gas valve body assembly;

a second diaphragm chamber separated from the low pressure water chamber by the second diaphragm, a second diaphragm capsule seat disposed in the second oil chamber, the second diaphragm capsule seat abutting against the second On the diaphragm;

The first oil chamber and the second oil chamber are interpenetrated and filled with hydraulic oil.

7. The water-gas interlocking valve according to claim 6, wherein the first diaphragm and the second diaphragm are disposed at a joint between the linkage assembly and the water valve body assembly, Linkage component and said The first oil chamber is formed between the first diaphragms, and the second oil chamber is formed between the linkage assembly and the second diaphragm.

The water-gas interlocking valve according to claim 7, wherein the first oil chamber and/or the second oil chamber are provided with oil holes.

9. The water-gas interlocking valve according to claim 8, wherein the oil hole is provided with a sealing cap.

The water-gas interlocking valve according to claim 5 or 9, wherein the sealing jaw is provided with a sealing jaw on one side and a valve spring on the other side.