Gas valve capable of adjusting flow

Abstract

The gas valve comprises a valve body, a gas inlet cavity is formed in one end of the valve body, an inner valve cavity is formed in the valve body, a gas outlet cavity is formed in the other end of the valve body, a first valve port is formed between the inner valve cavity and the gas inlet cavity, and a second valve port is formed between the inner valve cavity and the gas outlet cavity. A switch electromagnetic valve corresponding to the first valve port is installed on the valve body, an auxiliary valve rod is arranged at the front end of the main valve rod in an extending mode, an expansion cavity is further formed in the valve body, a gulp valve port extending into the inner valve cavity is formed in the expansion cavity, a switch valve is installed on the second valve port, and the switch valve abuts against a diaphragm on the side wall of the expansion cavity. A flow adjusting cavity is formed in one side of the valve body, a flow adjusting valve is arranged in the flow adjusting cavity, the expansion cavity is communicated with the flow adjusting cavity through an internal blind pass of the valve body, and the flow adjusting cavity is communicated with the air outlet cavity through an air supplementing flow channel. The gas valve of the gas water heater solves the problem that a gas valve of an existing gas water heater is unstable in gas adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a gas valve capable of adjusting flow rate. Background Art

[0002] A gas valve needs to be installed in a gas water heater to control the gas input into the burner of the water heater. Current gas valves are generally controlled directly by solenoid valves. The opening and closing of the solenoid valves have a large impact on the change in the inlet and outlet flow of the gas. As a result, the combustion of the gas in the burner also has large fluctuations, resulting in incomplete combustion and unstable water temperature, which affects the daily use of the gas water heater. Utility Model Content

[0003] The utility model provides a gas valve with adjustable flow rate, which solves the problem that the gas valve of the existing gas water heater is unstable in regulating the gas and affects the daily use effect of the gas water heater.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas valve with adjustable flow rate, comprising a valve body, an air inlet cavity is arranged at one end of the valve body, an inner valve cavity is arranged inside the valve body, an air outlet cavity is arranged at the other end of the valve body, a first valve port is arranged between the inner valve cavity and the air inlet cavity, a second valve port is arranged between the inner valve cavity and the air outlet cavity, a switch solenoid valve corresponding to the first valve port is installed on the valve body, a first sealing ring for sealing the first valve port is arranged on the main valve stem of the switch solenoid valve, a secondary valve stem is extended from the front end of the main valve stem, a second sealing ring is arranged at the front end of the secondary valve stem, and a valve body is also provided inside An expansion chamber is provided, and an air replenishing valve port extending into the inner valve chamber is provided on the expansion chamber, the second sealing ring corresponds to the air replenishing valve port, a first spring is provided on the outer side of the main valve stem, a second spring is provided between the front end of the auxiliary valve stem and the first sealing ring, a switch valve is installed on the second valve port, the switch valve is abutted against a diaphragm on the side wall of the expansion chamber, a flow regulating chamber is provided on one side of the valve body, a flow regulating valve is provided in the flow regulating chamber, the expansion chamber is connected with the flow regulating chamber through an internal secret passage of the valve body, the valve stem of the flow regulating valve blocks the internal secret passage, and the flow regulating chamber is connected with the air outlet chamber through the air replenishing passage.

[0005] Preferably, an axially movable limiting sleeve is disposed inside the main valve stem, and the tail of the auxiliary valve stem passes through the limiting sleeve.

[0006] Preferably, a detachable end plate is installed on the valve body at a position corresponding to the diaphragm.

[0007] Preferably, the switch valve includes a valve seat clamped between the inner valve cavity and the air outlet cavity, a second valve port is arranged on the top of the valve seat, a sealing valve plate for closing the second valve port is arranged in the middle of the valve seat, a sealing valve stem that abuts against the diaphragm is vertically connected to the lower end of the sealing valve plate, a guide frame is arranged in the middle of the valve seat, the sealing valve stem passes through the guide frame, and a third spring is installed between the outer side of the sealing valve stem and the guide frame.

[0008] Preferably, the flow regulating valve is an electromagnetic regulating valve.

[0009] Preferably, an air outlet regulating rod is radially installed at the air outlet of the air outlet cavity.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] An expansion chamber and an internal secret passage connected to the expansion chamber are provided, and when the first valve port is opened, the gas can enter the expansion chamber and the internal secret passage, and the internal secret passage cooperates with the flow regulating valve to realize the gas directly passing into the gas outlet chamber to realize the gas replenishment of the gas outlet, and the gas outlet size can be stably adjusted by the flow regulating valve, so that the gas can burn more fully in the water heater and the hot water is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the closed state structure of the utility model;

[0013] Figure 2 for Figure 1 A magnified structural diagram;

[0014] Figure 3 for Figure 1 The enlarged structure diagram at B;

[0015] Figure 4 This is a cross-sectional schematic diagram of the switch solenoid valve of the utility model at the moment of opening;

[0016] Figure 5 It is a cross-sectional schematic diagram of the expansion chamber of the utility model when opening the air intake;

[0017] Figure 6 It is a cross-sectional schematic diagram of the switch valve of the utility model in the open low-fire state;

[0018] Figure 7 It is a cross-sectional schematic diagram of the switch valve of the utility model in the open medium-fire state;

[0019] Figure 8 It is a cross-sectional schematic diagram of the switch valve of the utility model in the open high-fire state;

[0020] Fig. 9It is a schematic diagram of the manual adjustment structure of the utility model. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] like Figure 1-8 As shown, the utility model provides a gas valve with adjustable flow rate, including a valve body 1, one end of the valve body 1 is provided with an air inlet cavity 2, the interior of the valve body 1 is provided with an inner valve cavity 3, the other end of the valve body 1 is provided with an air outlet cavity 4, a first valve port 5 is provided between the inner valve cavity 3 and the air inlet cavity 2, a second valve port 13 is provided between the inner valve cavity 3 and the air outlet cavity 4, a switch solenoid valve 6 corresponding to the first valve port 5 is installed on the valve body 1, a first sealing ring 18 for blocking the first valve port 5 is provided on the main valve stem 19 of the switch solenoid valve 6, a secondary valve stem 22 is provided at the front end of the main valve stem 19, a second sealing ring 17 is provided at the front end of the secondary valve stem 22, an expansion cavity 7 is further provided inside the valve body 1, and a second sealing ring 18 is provided on the expansion cavity 7. A supplementary air valve port 24 extending into the inner valve cavity 3 is provided, the second sealing ring 17 corresponds to the supplementary air valve port 24, a first spring 23 is provided on the outer side of the main valve stem 19, a second spring 21 is provided between the front end of the auxiliary valve stem 22 and the first sealing ring 18, a switch valve 11 is installed on the second valve port 13, the switch valve 11 is abutted against the diaphragm 9 on the side wall of the expansion cavity 7, a flow regulating cavity 15 is provided on one side of the valve body 1, a flow regulating valve 16 is provided in the flow regulating cavity 15, the expansion cavity 7 is connected with the flow regulating cavity 15 through the internal dark channel 8 of the valve body 1, the valve stem 25 of the flow regulating valve 16 blocks the internal dark channel 8, and the flow regulating cavity 15 is connected with the air outlet cavity 4 through the supplementary air channel 14.

[0023] As the working principle of this embodiment:

[0024] like Figure 1 As shown, all valves are in the closed state and gas cannot enter the gas valve.

[0025] Then as Figure 4 As shown, the switch solenoid valve 6 is powered on and opened, the main valve stem 19 rises, the first valve port 5 is opened, and the gas in the air intake chamber 2 enters the inner valve chamber 3 from the air intake chamber 2. At this time, the air supply valve port 24 and the second valve port 13 are still in a closed state.

[0026] As the main valve stem 19 continues to rise, Figure 5As shown, the main valve stem 19 will also pull up the auxiliary valve stem 22, so that the air supply valve port 24 is also opened, and the gas can enter the expansion chamber 7. The gas in the expansion chamber 7 also enters the internal dark channel 8 at the same time. If the flow regulating valve 16 is opened at this time, the gas can enter the flow regulating chamber 15, enter the air outlet chamber 4 from the air supply channel 14 and be discharged, thereby realizing a small amount of gas discharge.

[0027] As more and more gas enters the expansion chamber 7, Figure 6 As shown, the gas pushes up the diaphragm 9 and opens the switch valve 11, and the second valve port 13 is opened. The gas can directly enter the gas outlet cavity 4 from the second valve port 13 to achieve a relatively large gas outlet volume.

[0028] And as Figure 7-8 As shown, the gas output can be directly adjusted through the flow regulating chamber 15. Since the gas output of the supplementary gas flow channel 14 is relatively small, the adjustment range of the gas output is relatively small, which can ensure the stable and accurate adjustment of small, medium and large fires, so that the gas in the water heater burns more fully and the hot water is relatively stable. The flow regulating valve 16 can be an electromagnetic regulating valve, which adjusts the size of the supplementary gas entering the flow regulating chamber 15 through electric current.

[0029] like Fig. 9 As shown, the flow regulating valve 16 can also be a manually set regulating valve, and an air outlet regulating rod 26 needs to be installed radially at the air outlet hole 27 of the air outlet cavity 4. The air outlet volume can be directly adjusted by rotating the air outlet regulating rod 26, which is convenient and reliable.

[0030] In this embodiment, an axially movable limiting sleeve 20 is provided inside the main valve stem 19, and the tail of the auxiliary valve stem 22 passes through the limiting sleeve 20. When the auxiliary valve stem 22 opens the valve, the limiting sleeve 20 can be lifted up to play a buffering role for the auxiliary valve stem 22.

[0031] In this embodiment, a detachable end plate 10 is installed at a position on the valve body 1 corresponding to the diaphragm 9 to facilitate installation and removal of the diaphragm 9 .

[0032] In this embodiment, if Figure 3 As shown, the switch valve 11 includes a valve seat 113 clamped between the inner valve cavity 3 and the air outlet cavity 4, the top of the valve seat 113 is provided with a second valve port 13, the middle of the valve seat 113 is provided with a sealing valve plate 111 for closing the second valve port 13, the lower end of the sealing valve plate 111 is vertically connected with a sealing valve stem 112 that abuts against the diaphragm 9, the middle of the valve seat 113 is provided with a guide frame 114, the sealing valve stem 112 passes through the guide frame 114, and a third spring 115 is installed between the outer side of the sealing valve stem 112 and the guide frame 114, so as to realize the rapid opening and closing of the second valve port 13.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A gas valve with adjustable flow, characterized in that: include: A valve body (1), wherein an air inlet cavity (2) is arranged at one end of the valve body (1), an inner valve cavity (3) is arranged inside the valve body (1), an air outlet cavity (4) is arranged at the other end of the valve body (1), a first valve port (5) is arranged between the inner valve cavity (3) and the air inlet cavity (2), a second valve port (13) is arranged between the inner valve cavity (3) and the air outlet cavity (4), a switch solenoid valve (6) corresponding to the first valve port (5) is installed on the valve body (1), a first sealing ring (18) for blocking the first valve port (5) is arranged on the main valve stem (19) of the switch solenoid valve (6), a secondary valve stem (22) is extended from the front end of the main valve stem (19), a second sealing ring (17) is arranged at the front end of the secondary valve stem (22), an expansion cavity (7) is further arranged inside the valve body (1), and a valve member (18) is arranged on the expansion cavity (7) to extend into the inner valve cavity (3) The second sealing ring (17) corresponds to the air supply valve port (24); a first spring (23) is arranged on the outer side of the main valve stem (19); a second spring (21) is arranged between the front end of the auxiliary valve stem (22) and the first sealing ring (18); a switch valve (11) is installed on the second valve port (13); the switch valve (11) abuts against a diaphragm (9) on the side wall of the expansion chamber (7); a flow regulating chamber (15) is arranged on one side of the valve body (1); a flow regulating valve (16) is arranged in the flow regulating chamber (15); the expansion chamber (7) is connected to the flow regulating chamber (15) through an internal dark channel (8) of the valve body (1); the valve stem (25) of the flow regulating valve (16) blocks the internal dark channel (8); and the flow regulating chamber (15) is connected to the air outlet chamber (4) through the air supply channel (14).

2. The flow-adjustable gas valve according to claim 1, characterized in that: An axially movable limiting sleeve (20) is arranged inside the main valve stem (19), and the tail of the auxiliary valve stem (22) passes through the limiting sleeve (20).

3. The flow-adjustable gas valve according to claim 1, characterized in that: A detachable end plate (10) is installed on the valve body (1) at a position corresponding to the diaphragm (9).

4. The flow-adjustable gas valve according to claim 1, characterized in that: The switch valve (11) comprises a valve seat (113) clamped between the inner valve cavity (3) and the air outlet cavity (4); a second valve port (13) is arranged at the top of the valve seat (113); a sealing valve plate (111) for closing the second valve port (13) is arranged in the middle of the valve seat (113); a sealing valve stem (112) abutting against the diaphragm (9) is vertically connected to the lower end of the sealing valve plate (111); a guide frame (114) is arranged in the middle of the valve seat (113); the sealing valve stem (112) passes through the guide frame (114); and a third spring (115) is installed between the outer side of the sealing valve stem (112) and the guide frame (114).

5. The flow-adjustable gas valve according to claim 1, characterized in that: The flow regulating valve (16) is an electromagnetic regulating valve.

6. The flow-adjustable gas valve according to claim 1, characterized in that: An air outlet regulating rod (26) is radially mounted at the air outlet hole (27) of the air outlet cavity (4).

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