Constant-pressure steady-flow water-gas linkage valve

Abstract

A constant-pressure steady-flow water-gas linkage valve comprises a gas valve part and a water valve part, the gas valve part comprises a gas valve body, an electromagnetic valve assembly, a gas valve element, a gas valve rod, a one-way valve element, a gas spring and a gas ejector rod, the gas valve body comprises a gas inlet pipe, an electromagnetic valve seat, a valve element cavity, a one-way valve cavity, a gas outlet cavity and a gas outlet connector, and the gas ejector rod is in sliding fit with a guide hole of a guide seat. The gas spring is matched with the closed end of the one-way valve cavity and the one-way valve element; the water ejector rod is fixed with the tray, the tray is attached to the diaphragm, the end cover is buckled with the diaphragm cavity and fixes the diaphragm, and the water ejector rod is in sliding fit with the rod guide hole and extends out; the negative pressure prevention device is fixed with the mounting hole and extends into the diaphragm cavity through the air inlet cavity to be matched with the diaphragm; the end cover is connected with an air outlet cavity of the air valve body, and the air ejector rod and the water ejector rod drive each other. The pressure stabilizing pipe is arranged and communicated with the membrane cavity and the water outlet connector, when the water pressure of a water source is suddenly increased, the membrane cavity releases pressure through the pressure stabilizing pipe, and the pressure in the membrane cavity is kept constant; the air outlet amount of the air valve body is prevented.

Description

Technical Field

[0001] The utility model relates to a gas water heating device, in particular to a water-gas linkage valve. Background Art

[0002] In the current prior art, Chinese Patent No. 201820902872.0, a water-gas linkage valve, both ends of the linkage valve body are respectively connected to a water valve body and a gas valve body. A water pressure chamber is jointly formed inside the water valve body and the linkage valve body, and a gas passage is jointly formed inside the gas valve body and the linkage valve body. It further includes a water pressure chamber diaphragm, a linkage shaft, a valve stop member and a valve. The water pressure chamber diaphragm is arranged inside the water pressure chamber, the valve is arranged inside the gas passage, the linkage shaft is arranged inside the linkage valve body and its two ends are respectively connected to the valve and the water pressure chamber diaphragm, the valve stop member is arranged on the inner wall of the linkage valve body, and the water pressure chamber diaphragm, the linkage shaft and the valve are in linkage; one end of the valve close to the water pressure chamber diaphragm has a first inclined surface and a second inclined surface, and a first air intake gap and a second air intake gap are respectively formed between the first inclined surface and the second inclined surface and the valve stop member, and the minimum value of the second air intake gap is greater than the maximum value of the first air intake gap. The problem is that with the change of the water inlet pressure of the water valve body, the water pressure chamber diaphragm reciprocates, the gas volume of the gas valve body changes, resulting in the change of the water temperature of the gas water heating device. Content of the Utility Model

[0003] The purpose of the utility model is to provide a constant-pressure and stable-flow water-gas linkage valve, which has the characteristics of stable pressure in the diaphragm chamber, preventing diaphragm vibration and keeping the gas volume constant.

[0004] The utility model is realized as follows: a constant-pressure and stable-flow water-gas linkage valve, including a gas valve part and a water valve part, and the special feature is that: the gas valve part includes a gas valve body, an electromagnetic valve assembly, a gas valve core and a gas valve rod, a one-way valve core, a gas spring and a gas push rod. The gas valve body includes an air inlet pipe, an electromagnetic valve seat, a valve core cavity, a one-way valve cavity, an air outlet cavity and an air outlet interface. The communication part between the one-way valve cavity and the air outlet cavity serves as a one-way valve seat, and a guide seat is arranged inside the air outlet cavity; the gas push rod is in sliding fit with the guide hole of the guide seat and extends out of the air outlet cavity, the gas push rod cooperates with the one-way valve core, and the gas spring cooperates with the closed end of the one-way valve cavity and the one-way valve core;

[0005] The water valve part includes a water valve main body, a water valve core and a water valve rod, an anti-negative pressure device, a diaphragm, a tray, a water push rod and an end cover,

[0006] The water valve main body includes a water inlet interface, a water inlet cavity, a mounting hole arranged on the water inlet cavity, a diaphragm cavity, a water valve core cavity, a water outlet interface and a pressure stabilizing pipe. The water valve core cavity is communicated with the diaphragm cavity, a water inlet hole is arranged on the partition between the water inlet cavity and the diaphragm cavity, and one end of the pressure stabilizing pipe is communicated with the diaphragm cavity and is located inside the water outlet interface;

[0007] The end cover is provided with a rod guide hole;

[0008] The water ejector rod is fixed to the tray, the tray is in contact with the diaphragm, the end cover is fastened to the membrane cavity and fixes the diaphragm, the water ejector rod is in sliding fit with the rod guide hole and extends out; the anti-negative pressure device is fixed to the mounting hole and extends into the membrane cavity through the air inlet cavity to cooperate with the diaphragm; the end cover is connected to the end of the air outlet cavity of the air valve body, and the air ejector rod and the water ejector rod drive each other.

[0009] In the described constant-pressure and steady-flow water-air linkage valve, its special feature lies in: the voltage stabilizing tube extends into the membrane cavity, and a voltage stabilizing hole is provided at one end of the voltage stabilizing tube located in the membrane cavity.

[0010] In the described constant-pressure and steady-flow water-air linkage valve, its special feature lies in: the anti-negative pressure device includes a seat body, a pressure spring and a limit rod member.

[0011] The seat body is provided with a seat spring cavity, the limit rod member includes a head and a rod portion, and a head spring cavity is provided on the head.

[0012] Both ends of the pressure spring are respectively embedded in the seat spring cavity and the head spring cavity, the seat body is fixed and sealed with the mounting hole, and the rod portion extends into the membrane cavity through the water inlet hole and abuts against the diaphragm.

[0013] In the described constant-pressure and steady-flow water-air linkage valve, its special feature lies in: the one-way valve core includes an annular valve core and a valve core seat body.

[0014] The valve core seat body includes a body portion, an annular seat plate and a spring column.

[0015] The annular valve core is sleeved on the body portion and is in contact with the annular seat plate, the spring column is inserted into one end of the air spring; the body portion extends into the valve core seat, and the annular valve core is in contact with the valve core seat.

[0016] In the described constant-pressure and steady-flow water-air linkage valve, its special feature lies in: the end cover is provided with a head, and the rod guide hole is provided on the head.

[0017] The end of the air valve body is provided with a cavity seat, a head cavity is provided in the cavity seat, and the guide hole of the guide seat extends to a cavity seat.

[0018] The end cover is fitted with the cavity seat, the cavity seat is fixed to the membrane cavity, and the head is inserted into the head cavity.

[0019] In the described constant-pressure and steady-flow water-air linkage valve, its special feature lies in: the guide seat is provided with an activity cavity with a rear opening.

[0020] It further includes a transmission member, a seat frame and a micro switch provided on the seat frame.

[0021] The transmission member includes a fork frame, a cross bar and a vertical shaft.

[0022] The seat frame is provided on the air valve body, the vertical shaft is hinged to two frame plates of the seat frame, the fork frame extends into the activity cavity and is hinged to the water ejector rod; the vertical shaft cooperates with the micro switch.

[0023] The utility model relates to a constant-pressure and stable-flow water-air linkage valve. A voltage stabilizing tube is provided and communicated with a membrane cavity and a water outlet interface. When the water pressure of the water source suddenly increases, the membrane cavity discharges pressure through the voltage stabilizing tube, maintaining a constant pressure in the membrane cavity and preventing the change of the air output of the air valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a sectional view of the utility model.

[0025] Figure 2 is Figure 1 the A-A view of ...

[0026] Figure 3 is Figure 1 the B-B view of

[0027] Figure 4 is Figure 1 the C-C view of

[0028] Figure 5 It is a three-dimensional view of the utility model.

[0029] Figure 6 It is a sectional view of the water valve part of the utility model.

[0030] Figure 7 is Figure 6 the D-D view of

[0031] Figure 8 is Figure 6 the E-E view of

[0032] Figure 9 is Figure 8 the F-F view of

[0033] Figure 10 It is a three-dimensional exploded view of the water valve part of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following is a detailed description of the embodiments of the utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model and should not be construed as a limitation of the utility model.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] As Figure 1 shown, a constant-pressure and steady-flow water-air interlock valve includes an air valve part 1 and a water valve part 2. The air valve part 1 includes an air valve body 3, a solenoid valve assembly 4, an air valve core 5 and an air valve rod (not marked), a one-way valve core 6, an air spring 7 and an air push rod 8. The air valve body 3 includes an air inlet pipe 31, a solenoid valve seat 32 provided on the air inlet pipe 31, a valve core cavity 33, a one-way valve cavity 34, an air outlet cavity 35 and an air outlet interface 36. The air inlet pipe 31, the valve core cavity 33, the one-way valve cavity 34, the air outlet cavity 35 and the air outlet interface 36 are connected in sequence. The air valve core 5 is arranged in the valve core cavity 33. The connection part between the one-way valve cavity 34 and the air outlet cavity 35 serves as a one-way valve seat. A guide seat 351 is arranged in the air outlet cavity 35. The air push rod 8 is in sliding fit with the guide hole of the guide seat 351. The air push rod 8 cooperates with the one-way valve core 6. The air spring 7 cooperates with the closed end of the one-way valve cavity 34 and the one-way valve core 6. The one-way valve core 6 cooperates with the one-way valve seat to achieve air on-off. When the one-way valve core 6 and the one-way valve seat are in contact, it is cut off. When the one-way valve core 6 leaves the one-way valve seat, it is conducted. The air push rod 8 drives the one-way valve core 6;

[0037] The water valve part 2 includes a water valve main body 9, a water valve core 10 and a water valve rod, a negative pressure prevention device 11, a diaphragm 12, a tray 13, a water push rod 14 and an end cover 15.

[0038] The water valve main body 9 includes a water inlet interface 91, a water inlet cavity 92, a mounting hole 93 provided on the water inlet cavity 92, a diaphragm cavity 94, a water valve core cavity 95, a water outlet interface 96 and a pressure stabilizing pipe 97. The water valve core cavity 95 is communicated with the diaphragm cavity 94. A water inlet hole 98 is provided on the partition between the water inlet cavity 92 and the diaphragm cavity 94. One end of the pressure stabilizing pipe 97 is communicated with the diaphragm cavity 94 and is located inside the water outlet interface 96. The water inlet interface 91 is communicated with the water inlet cavity 92;

[0039] The end cover 15 is provided with a rod guide hole 151;

[0040] The water push rod 14 is fixed to the tray 13. The tray 13 is in contact with the diaphragm 12. The end cover 15 is buckled with the diaphragm cavity 94 and fixes the diaphragm 12. The water push rod 14 is in sliding fit with the rod guide hole 151 and extends out. The negative pressure prevention device 11 is fixed to the mounting hole 93 and extends into the diaphragm cavity 94 through the water inlet cavity 92 and the water inlet hole 98 to cooperate with the diaphragm 12. The end cover 15 is connected to the end of the air outlet cavity 35 of the air valve body 3. The air push rod 8 and the water push rod 14 drive each other.

[0041] As a further improvement of the present utility model: the voltage stabilizing tube 97 extends into the membrane cavity 94, and a voltage stabilizing hole 971 is provided at one end of the voltage stabilizing tube 97 located in the membrane cavity 94. The inner cavity of the voltage stabilizing tube 97 includes a circular cavity 972 and a frustum-shaped pressure relief cavity 973, and the voltage stabilizing hole 971 communicates with the circular cavity 972; with such a structure, rapid pressure relief is achieved and fluctuations are reduced.

[0042] As shown in Figure 7 the anti-negative pressure device 11 includes a seat body 111, a pressure spring 112 and a limiting rod member,

[0043] the seat body 111 is provided with a seat spring cavity 1111, the limiting rod member includes a head portion 1131 and a rod portion 1132, and a head spring cavity is provided on the head portion 1131;

[0044] both ends of the pressure spring 112 are respectively embedded in the seat spring cavity 1111 and the head spring cavity, the seat body 111 is fixedly and sealed with the mounting hole 93, and the rod portion 1132 extends into the membrane cavity 94 through the water inlet hole 98 and abuts against the diaphragm 12. The diaphragm 12 and the limiting rod member move synchronously.

[0045] As a further improvement of the present utility model: the one-way valve core 6 includes an annular valve core 61 and a valve core seat body,

[0046] the valve core seat body includes a body portion 621, an annular seat plate 622 and a spring column 623;

[0047] the annular valve core 61 is sleeved on the body portion 621 and fits with the annular seat plate 622, and the spring column 623 is inserted into one end of the air spring 7; the body portion 621 extends into the one-way valve seat, and the annular valve core 61 fits with the one-way valve seat; there is a gap between the body portion 621 and the inner cavity of the one-way valve seat and they are in sliding fit. The end of the body portion 621 cooperates with the air ejector rod 8; it can also be understood that: the body portion 621 extends into the air outlet cavity 35, and the annular valve core 61 fits with the end plate adjacent to the one-way valve cavity and the air inlet cavity 35.

[0048] As a further improvement of the present utility model: the end cover 15 is provided with a head portion 152, and a rod guiding hole 151 is provided on the head portion 152;

[0049] the end of the air valve body 3 is provided with a cavity seat 37, a head cavity is provided in the cavity seat 37, and the guiding hole of the guiding seat 351 extends to the cavity seat 37;

[0050] the end cover 15 is fitted with the cavity seat 37, the cavity seat 37 is fixed to the membrane cavity 94, and the head portion 152 is inserted into the head cavity.

[0051] As a further improvement of the present utility model: the guiding seat 351 is provided with an activity cavity 352 with a rear opening;

[0052] It further includes a transmission member 16, a seat frame 17, and a microswitch (not shown in the figure) provided on the seat frame.

[0053] The transmission member 16 includes a fork frame 161, a cross bar 162, and a vertical shaft 163.

[0054] The seat frame is provided on the gas valve body 3. The vertical shaft 163 is hinged to two frame plates of the seat frame 17. The fork frame 161 extends into the movable cavity 352 and is hinged to the water push rod 14. The vertical shaft 163 cooperates with the microswitch.

[0055] When the present utility model is in use, the source water enters the membrane cavity 94 through the water inlet interface 91 and the water inlet cavity 92. As Figure 1 shown, the limiting rod member, the water push rod 14, the gas push rod 8, and the valve core seat body move synchronously to the left. The annular valve core 61 leaves the one-way valve seat, and the gas is supplied to the combustion appliance by the gas outlet joint 36. The water in the membrane cavity 94 enters the heat exchanger through the water valve core cavity 95 and the water outlet interface 96.

[0056] Within the set water flow pressure range, as the water flow pressure increases, the gas volume increases; as the water flow pressure decreases, the gas volume decreases, achieving a constant water outlet temperature of the heat exchanger.

[0057] When the source water pressure suddenly increases and exceeds the set water flow pressure range, the water pressure in the membrane cavity 94 increases. The water in the membrane cavity 94 enters the water outlet interface through the pressure stabilizing pipe to relieve pressure, maintaining the pressure in the membrane cavity constant and preventing membrane vibration.

[0058] When the water pressure decreases, the rod portion 1132 of the limiting rod member supports the diaphragm to keep the pressure in the membrane cavity unchanged.

[0059] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A constant-pressure and steady-flow water-air interlocking valve, comprising an air valve part and a water valve part, characterized in that: The air valve part includes an air valve body, a solenoid valve assembly, an air valve core and an air valve rod, a one-way valve core, an air spring and an air push rod. The air valve body includes an air inlet pipe, a solenoid valve seat, a valve core cavity, a one-way valve cavity, an air outlet cavity and an air outlet interface. The communication part between the one-way valve cavity and the air outlet cavity serves as a one-way valve seat, and a guide seat is arranged in the air outlet cavity. The air push rod is slidably matched with the guide hole of the guide seat, the air push rod is matched with the one-way valve core, and the air spring is matched with the closed end of the one-way valve cavity and the one-way valve core. The water valve part includes a water valve body, a water valve core and a water valve rod, an anti-negative pressure device, a diaphragm, a tray, a water push rod and an end cover. The water valve body includes a water inlet interface, a water inlet cavity, a mounting hole arranged on the water inlet cavity, a diaphragm cavity, a water valve core cavity, a water outlet interface and a pressure stabilizing pipe. The water valve core cavity communicates with the diaphragm cavity, and a water inlet hole is arranged on the partition plate between the water inlet cavity and the diaphragm cavity. One end of the pressure stabilizing pipe communicates with the diaphragm cavity and is located in the water outlet interface. The end cover is provided with a rod guide hole. The water push rod is fixed to the tray, the tray is attached to the diaphragm, the end cover is buckled with the diaphragm cavity and fixes the diaphragm, and the water push rod is slidably matched with the rod guide hole and extends out. The anti-negative pressure device is fixed to the mounting hole and extends into the diaphragm cavity through the air inlet cavity to cooperate with the diaphragm. The end cover is connected to the end of the air outlet cavity of the air valve body, and the air push rod and the water push rod drive each other.

2. The constant-pressure and steady-flow water-air interlock valve according to claim 1, wherein: The pressure stabilizing pipe extends into the diaphragm cavity, and a pressure stabilizing hole is arranged at one end of the pressure stabilizing pipe located in the diaphragm cavity.

3. The constant-pressure and steady-flow water-air interlocking valve according to claim 1, characterized in that: The anti-negative pressure device includes a seat body, a pressure spring and a limiting rod member. The seat body is provided with a seat spring cavity, and the limiting rod member includes a head and a rod portion. A head spring cavity is arranged on the head. The two ends of the pressure spring are respectively embedded in the seat spring cavity and the head spring cavity. The seat body is fixed and sealed with the mounting hole, and the rod portion extends into the diaphragm cavity through the water inlet hole to abut against the diaphragm.

4. The constant-pressure and steady-flow water-air interlocking valve according to claim 1, wherein: The one-way valve core includes an annular valve core and a valve core seat body. The valve core seat body includes a body portion, an annular seat plate and a spring column. The annular valve core is sleeved on the body portion and is attached to the annular seat plate. The spring column is inserted into one end of the air spring. The body portion extends into the one-way valve seat, and the annular valve core is attached to the one-way valve seat.

5. A constant-pressure and steady-flow water-air interlock valve according to claim 1, characterized in that: The end cover is provided with a head, and the rod guide hole is arranged on the head. The end of the air valve body is provided with a cavity seat, and a head cavity is arranged in the cavity seat. The guide hole of the guide seat extends to the cavity seat. The end cover is fitted with the cavity seat, the cavity seat is fixed to the diaphragm cavity, and the head is inserted into the head cavity.

6. The constant-pressure and steady-flow water-air linkage valve according to claim 5, wherein: The guide seat is provided with an activity cavity with a rear opening. It further includes a transmission member, a seat frame and a micro switch arranged on the seat frame. The transmission member includes a fork frame, a cross bar and a vertical shaft. The seat frame is arranged on the air valve body. The vertical shaft is hinged to two frame plates of the seat frame. The fork frame extends into the activity cavity and is hinged to the water push rod. The vertical shaft cooperates with the micro switch.

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