CN103104721B - Water-air interstage valve - Google Patents

Abstract

A water-gas linkage valve, including a water valve, a linkage valve and a Venturi differential pressure pipe, the water valve and the linkage valve together form a water pressure chamber, a diaphragm is arranged in the water pressure chamber and the water pressure chamber is divided into a high-pressure chamber and a low-pressure chamber , the high-pressure chamber is provided with a water outlet channel, and the water outlet channel is provided with a water valve core channel containing a water valve core, wherein the Venturi differential pressure tube is arranged in parallel with the water outlet channel, the inlet end of the Venturi differential pressure tube is connected with the high-pressure chamber, and the Venturi differential pressure tube The outlet end and the water outlet channel meet at or before the water spool channel, and the throat of the Venturi differential pressure tube communicates with the low-pressure chamber through the bypass channel. In the present invention, the Venturi differential pressure pipe is arranged in parallel with the water outlet channel, and meets the water outlet channel before the water valve core, thereby avoiding the influence of the minimum starting water pressure of the gas water heater due to the adjustment of the water flow rate of the water valve core, so that the gas water heater is The minimum starting water pressure fluctuates less and tends to be consistent under the conditions of large water and small water.

Description

Water and gas linkage valve

technical field

The present invention relates to a water-gas linkage valve, in particular to a water-gas linkage valve used for gas water heaters or gas wall-hung boilers.

Background technique

The water pressure chamber of the water-gas linkage valve of a gas water heater is generally divided into two chambers, a high-pressure chamber and a low-pressure chamber, by a diaphragm. Water output. In order to obtain a larger water output for the gas water heater, the existing water-gas linkage valve is connected in series with a Venturi pressure difference tube in the water outlet channel of the high pressure chamber of the water pressure chamber, and the Venturi pressure difference tube is located in the water valve core channel of the water outlet channel After that, the throat of the Venturi differential pressure tube communicates with the low-pressure chamber of the water pressure chamber. When the water flows through the Venturi differential pressure tube, the throat of the Venturi differential pressure tube generates a low pressure, thereby pumping out part of the water flow and gas in the low pressure chamber, which can not only increase the water output of the gas water heater, but also increase the water pressure chamber. The pressure difference between the inner high-pressure chamber and the low-pressure chamber enables the gas water heater to start at a lower water pressure. However, since the Venturi differential pressure tube is located behind the water valve core channel of the water outlet channel, when the water flow of the water valve core is adjusted, the water flow through the Venturi differential pressure tube will change accordingly, and the throat of the Venturi differential pressure tube will produce The low pressure of the gas water heater will also change accordingly, which will directly affect the pressure difference between the high pressure chamber and the low pressure chamber in the water pressure chamber, resulting in the inconsistency of the minimum starting water pressure of the gas water heater under the conditions of large water and small water. Fluctuation, product performance is not stable enough. In order to overcome these defects, we have improved the water-gas linkage valve of the gas water heater.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water-gas linkage valve, which can effectively reduce the fluctuation range of the minimum starting water pressure of the gas water heater under different working conditions.

The technical scheme adopted by the present invention to solve the technical problem is: comprising a water valve, a linkage valve, an air valve and a Venturi differential pressure pipe, the air valve is provided with an air valve, and the water valve and the linkage valve together form a water pressure chamber, and inside the water pressure chamber There is a diaphragm and the water pressure chamber is divided into a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is provided with a water outlet channel, and the water outlet channel is provided with a water valve core channel containing a water valve core. The inlet end of the differential pressure pipe is connected with the high pressure chamber, the outlet end of the Venturi differential pressure pipe and the water outlet channel meet at the water valve core channel or before the water valve core channel, and the throat of the Venturi differential pressure tube passes through the bypass channel and the low pressure chamber connected.

The diaphragm is provided with a plug body corresponding to the water outlet channel, and the maximum diameter of the plug body is smaller than the inlet diameter of the water outlet channel.

The plug body is a cylinder or a cone.

The inside of the plug body is a hollow structure.

The air valve is provided with an air flow regulating surface, and the air flow regulating surface is a tapered surface.

The air valve is provided with an air flow regulating surface, the air flow regulating surface is a rotating surface, the generatrix of the rotating surface is a broken line, and the angle formed by each segment of the broken line and the rotating axis of the rotating surface gradually increases.

A buffer valve is arranged in the bypass channel.

The buffer valve includes a valve body, a ball valve core and a limit pin. The valve body is provided with a cavity and a main water flow channel and a secondary water flow channel. The main water flow channel and the secondary water flow channel respectively pass through the cavity and communicate with the bypass channel. The ball valve The core and the limit pin are set in the cavity, the limit pin blocks the water flow path of the cavity, and the ball valve core moves back and forth between the limit pin and the channel opening on the side of the main water flow channel close to the Venturi differential pressure tube. The main water flow channel, the secondary water flow channel and the bypass channel are kept in communication.

The diameter ratio of the secondary water flow channel to the main water flow channel is 0.1-0.3.

The linkage valve is provided with a valve retaining ring connected to the end of the valve, and the valve retaining ring is clamped on the linkage valve.

Compared with the background technology, the present invention has the beneficial effects: The Venturi differential pressure pipe of the present invention is arranged in parallel with the water outlet channel, and intersects with the water outlet channel before the water valve core channel or the water valve core channel, so that the venturi pressure difference The water flow rate of the pipe will not change due to the adjustment of the water valve core. The throat of the Venturi pressure difference pipe produces a relatively stable low pressure, which ensures the pressure difference between the high pressure chamber and the low pressure chamber in the water pressure chamber, thereby avoiding the pressure caused by the adjustment. The water flow rate of the water valve core affects the minimum starting water pressure of the gas water heater, so that the minimum starting water pressure of the gas water heater under the conditions of large water and small water fluctuates less and tends to be consistent.

Further, because the diaphragm is provided with a plug body whose diameter is smaller than that of the water outlet channel inlet, when the water pressure is low, the water flow accumulates in the high-pressure chamber to open the air valve in time, and dry burning can be effectively prevented.

Furthermore, the plug body is a cylinder or a cone, which can effectively improve the control accuracy of the plug body to the water volume ratio; and the inside of the plug body is a hollow structure, which can prevent shrinkage and deformation of the plug body due to uneven thickness.

Furthermore, the gas flow regulating surface of the valve adopts a conical surface or a rotating surface structure whose generatrix is a broken line, which can effectively improve the control accuracy of the valve to the gas volume ratio.

Furthermore, a buffer valve is provided in the bypass channel, which can effectively prevent the sudden movement of the air valve when the water flow increases suddenly, so that the air volume increases suddenly and the water temperature rises suddenly.

Further, the valve retaining ring is clamped on the linkage valve through the snap ring, which facilitates the replacement of the valve retaining ring and makes the linkage valve applicable to various air sources.

BRIEF DESCRIPTION OF THE DRAWINGS: Fig. 1 is a cross-sectional structure diagram of the present invention;

Fig. 2 is the enlarged structure diagram of place A in Fig. 1;

Fig. 3 is a kind of connection structure schematic diagram of the present invention;

Fig. 4 is a schematic diagram of another connection structure of the present invention;

Fig. 5 is the structural representation of valve 9;

FIG. 6 is a schematic structural view of the buffer valve 12;

FIG. 7 is a partial cross-sectional structural schematic diagram of the buffer valve 12;

FIG. 8 is a schematic cross-sectional plan view of the buffer valve 12 .

Specific embodiments: As shown in Figure 1 and Figure 2, this embodiment includes a water valve 1, a linkage valve 2, an air valve 3, and a Venturi differential pressure pipe 11. The air valve 3 is provided with a valve 9, and the linkage valve 2 is A small linkage shaft is provided, and the water valve 1 and the linkage valve 2 together form a water pressure chamber 7. The water pressure chamber 7 is provided with a diaphragm 6 that separates the water pressure chamber 7 into a low-pressure chamber and a high-pressure chamber. The low-pressure chamber is provided with a diaphragm glue The ring seat 8, the high-pressure chamber is provided with a water regulator 5 and a water outlet channel 10, the water outlet channel 10 is provided with a water valve core channel containing a water valve core 4, one end of the linkage small shaft is inserted into the diaphragm rubber ring seat 8, and the other end is inserted into the valve 9, the Venturi differential pressure pipe 11 is arranged in parallel with the outlet channel 10, the inlet end of the Venturi differential pressure tube 11 communicates with the high-pressure chamber, the outlet end of the Venturi differential pressure tube 11 meets the water outlet channel 10 in the water valve core channel, and the venturi The throat of the pressure difference pipe 11 communicates with the low-pressure chamber through a bypass passage 17, as shown in FIG. 3 .

In addition, the outlet end of the Venturi differential pressure pipe 11 and the water outlet channel 10 can also meet before the channel of the water valve core, as shown in FIG. 4 .

The diaphragm 6 is provided with a plug body 16 corresponding to the water outlet channel 10 , and the maximum diameter of the plug body 16 is smaller than the inlet diameter of the water outlet channel 10 . The plug body 16 is a cylinder or a cone, and the inside of the plug body 16 is a hollow structure.

As shown in Figure 2 and Figure 5, the end of the valve 9 is connected with a valve retaining ring 13, and the valve retaining ring 13 is clamped on the linkage valve 2 through the clip spring 15, and is sealed with the linkage valve 2 through the sealing ring 14, which can be convenient Replace the valve retaining ring 13, so that the linkage valve 2 can be adapted to a variety of air sources and increase the versatility. The gas flow regulating surface 91 of the valve 9 is a rotating surface, and the generatrix of the rotating surface is a broken line, and the angles formed by each section of the broken line and the axis of rotation of the rotating surface gradually increase, which helps the air volume to change in a certain proportion.

As shown in FIG. 6 , FIG. 7 and FIG. 8 , a buffer valve 12 is provided in the bypass channel 17 . The buffer valve 12 includes a valve body 121, a ball valve core 122 and a limit pin 126. The valve body 121 is provided with a cavity 124, a main water flow channel 123, and a secondary water flow channel 125, and the main water flow channel 123 and the secondary water flow channel 125 respectively pass through the cavity 124. And communicate with the bypass channel 17, the ball valve core 122, the limit pin 126 is arranged in the cavity 124, the limit pin 126 is blocked on the water flow path of the cavity 124, the ball valve core 122 is in the limit pin 126, the main water flow channel 123 The main water flow channel 123 is moved back and forth between the channel openings on the side close to the Venturi differential pressure pipe 11 , and the secondary water flow channel 125 is kept in communication with the bypass channel 17 . When the water valve 1 is opened quickly, the water flows into the high-pressure chamber to push the diaphragm 6, and the water in the low-pressure chamber is squeezed, quickly passes through the bypass channel 17 and the buffer valve 12, and is discharged from the Venturi differential pressure pipe 11. When the water flow quickly passes through the buffer valve 12, the ball valve core 122 is driven to rush to the channel opening of the main water flow channel 123, and the main water flow channel 123 is blocked, so that the water flow can only flow out of the low-pressure chamber through the secondary water flow channel 125, and the water in the low-pressure chamber cannot be quickly discharge, so that the valve 9 is slowly opened to ensure that the gas water heater is evenly ignited. When the low-pressure chamber and the high-pressure chamber reach a pressure balance, the ball valve core 122 is separated from the channel opening of the main water flow channel 123 due to gravity, the main water flow channel 123 is opened, and the buffer valve 12 loses its buffering effect. In order to ensure that the water in the depression chamber cannot be discharged quickly, the diameter of the secondary water flow channel 125 should be smaller than the diameter of the main water flow channel 123, and the ratio of the two diameters is 0.1-0.3.

The working principle of the present invention: during use, the water valve 1 is opened, and the water flows into the high-pressure chamber. Under the joint action of the Venturi differential pressure pipe 11 and the buffer valve 12, the diaphragm 6, the diaphragm rubber ring seat 8, and the small linkage shaft are slowly pushed And the valve 9 moves to the left, the valve 9 is opened, and the gas flows to the burner, thereby starting the gas water heater.

Claims (8)

1. a water vapor linked valve, comprise water valve (1), interstage valve (2), air valve (3) and venturi pressure reduction pipe (11), valve (9) is provided with in air valve (3), water valve (1), interstage valve (2) is composition hydraulic pressure chamber (7) jointly, be provided with barrier film (6) in hydraulic pressure chamber (7) and hydraulic pressure chamber (7) are divided into hyperbaric chamber and low-pressure cavity, hyperbaric chamber is provided with exhalant canal (10), exhalant canal (10) is provided with the water valve core passage containing water valve core (4), it is characterized in that described venturi pressure reduction pipe (11) and exhalant canal (10) are arranged in parallel, venturi pressure reduction pipe (11) entry end is communicated with hyperbaric chamber, venturi pressure reduction pipe (11) outlet end and exhalant canal (10) crossed before water valve core passage or water valve core passage, and the throat of venturi pressure reduction pipe (11) is communicated with low-pressure cavity by bypass passageways (17), described valve (9) is provided with throughput adjusting range (91), throughput adjusting range (91) is surface of revolution, the bus of surface of revolution is broken line, each section of broken line increases progressively gradually with the running shaft angulation of surface of revolution.

2. water vapor linked valve according to claim 1, it is characterized in that described barrier film (6) is provided with the cock body (16) corresponding with exhalant canal (10), the maximum diameter of cock body (16) is less than the inlet diameter of exhalant canal (10).

3. water vapor linked valve according to claim 2, is characterized in that described cock body (16) is cylinder or taper.

4. water vapor linked valve according to claim 2, is characterized in that the inside of described cock body (16) is hollow structure.

5. the water vapor linked valve according to any one of Claims 1 to 4, is characterized in that being provided with trimmer valve (12) in described bypass passageways (17).

6. water vapor linked valve according to claim 5, it is characterized in that described trimmer valve (12) comprises valve body (121), ball valve core (122) and position limit pin (126), valve body (121) is provided with cavity volume (124) and main flow channel (123), secondary flow channel (125), main flow channel (123), secondary flow channel (125) the through cavity volume of difference (124) is also communicated with bypass passageways (17), ball valve core (122), position limit pin (126) is located in cavity volume (124), position limit pin (126) gear is on the flow path of cavity volume (124), ball valve core (122) is in position limit pin (126), main flow channel (123) reciprocates opening and closing main flow channel (123) between the passway of venturi pressure reduction pipe (11) side, secondary flow channel (125) keeps being communicated with bypass passageways (17).

7. water vapor linked valve according to claim 6, is characterized in that described secondary flow channel (125) is 0.1 ~ 0.3 with the diameter ratio of main flow channel (123).

8. the water vapor linked valve according to any one of Claims 1 to 4, it is characterized in that being provided with the valve baffle ring (13) be connected with valve (9) end in described interstage valve (2), valve baffle ring (13) is connected on interstage valve (2).