Gas valve with adjustable low-gear flow channel

Abstract

The utility model discloses a gas valve with an adjustable low-gear flow channel, which comprises a valve body, a gas inlet cavity, a transition cavity and a gas outlet cavity which are sequentially connected with one another and are arranged in the valve body; the valve body comprises an air outlet communicated with the air outlet cavity; the push rod is arranged in the air outlet cavity and can do linear motion in the axial direction of the air outlet cavity; the electromagnetic valve is arranged at the end, close to the air inlet cavity, of the valve body, the electromagnetic valve comprises a valve element capable of doing linear motion in the axial direction of the air inlet cavity and a sealing block connected to the valve element, and the sealing block can separate the air inlet cavity from the transition cavity; a first sealing ring which can be matched with the push rod for sealing is arranged in the valve body, and the first sealing ring can separate the transition cavity from the air outlet cavity; a low-gear air channel capable of communicating the transition cavity with the air outlet is formed in the valve body, a low-gear adjusting rod is arranged in the low-gear air channel, and a circulation gap is formed between the low-gear adjusting rod and the inner wall of the low-gear air channel; the low-gear adjusting rod is movably arranged in the low-gear air channel so as to adjust the size of the circulation gap.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to a gas valve with an adjustable low-speed flow channel. Background Art

[0002] Gas fireplaces are a type of heating equipment that uses clean energy. They are popular among consumers because they not only provide adequate heating effects, but also provide real flames for viewing. As a decorative gas appliance, gas fireplaces usually require valves to control the supply and disconnection of gas. In addition, for installation and layout needs, direct-push valves with axial linear push are often used.

[0003] However, many direct-push valves on the market currently do not have flow adjustment functions, that is, they only have two states: open and closed. Even if some valves have two flow usage states: low-range and high-range, such as the gas valve mentioned in patent number CN201520987032.5, the low-range flow channel is fixed inside the valve and cannot be adjusted after the valve is assembled. Sometimes, in order to adapt to different product requirements, the low-range flow is different, which makes the use of the valve very inconvenient. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is to provide a gas valve with an adjustable low-speed flow channel. By setting a low-speed gas path channel, a low-speed working state can be achieved; by setting a low-speed adjustment rod in the low-speed gas path channel, the flow size can be adjusted as needed.

[0006] (II) Technical solution

[0007] The utility model solves the above technical problems by adopting a solution which is a gas valve with an adjustable low-speed flow channel. The gas valve comprises

[0008] A valve body, wherein an air inlet cavity, a transition cavity and an air outlet cavity are sequentially connected therein; and the valve body comprises an air inlet port communicating with the air inlet cavity and an air outlet port communicating with the air outlet cavity;

[0009] A push rod, which is arranged in the air outlet cavity and can move linearly along the axial direction of the air outlet cavity;

[0010] A solenoid valve is arranged at one end of the valve body close to the air inlet cavity, and the solenoid valve comprises a valve core capable of linear motion along the axial direction of the air inlet cavity, and a sealing block connected to one end of the valve core close to the air outlet cavity, wherein the sealing block can separate the air inlet cavity from the transition cavity;

[0011] Among them, a first sealing ring capable of cooperating with the push rod for sealing is provided in the valve body, and the first sealing ring can separate the transition chamber and the air outlet chamber; a low-grade air path channel capable of connecting the transition chamber and the air outlet is provided in the valve body, and a low-grade adjusting rod is provided in the low-grade air path channel, and a flow gap is formed between the low-grade adjusting rod and the inner wall of the low-grade air path channel; the low-grade adjusting rod is movably arranged in the low-grade air path channel to adjust the size of the flow gap.

[0012] Specifically, a first sealing ring is arranged between the transition chamber and the air outlet chamber. Through the cooperative sealing of the push rod and the first sealing ring, the airflow entering from the air inlet chamber can only flow to the air outlet through the low-grade air path channel; and when the seal of the push rod and the first sealing ring is released, the airflow entering from the air inlet chamber can flow to the air outlet through the low-grade air path channel and can flow to the air outlet from the air outlet chamber. There are two pathways to lead the airflow out, so a high fire state can be achieved.

[0013] By adopting the above scheme, a low-speed working state can be achieved by setting up a low-speed air path channel; by setting up a low-speed adjustment rod in the low-speed air path channel, the low-speed adjustment rod can be adjusted as needed, thereby adjusting the size of the flow gap between the low-speed adjustment rod and the inner wall of the low-speed air path channel, and then adjusting the flow rate flowing to the air outlet.

[0014] In some embodiments, the low-gear air path channel includes a low-gear air inlet channel connected to the transition chamber, and a low-gear air outlet channel connected to the air outlet, and the low-gear air inlet channel and the low-gear air outlet channel intersect; the low-gear air inlet channel or the low-gear air outlet channel extends axially to form a low-gear adjustment port, and the low-gear adjustment rod is arranged in the low-gear adjustment port and can make linear motion along the axial direction of the low-gear adjustment port.

[0015] In some embodiments, the low-speed air inlet passage and the low-speed air outlet passage are perpendicular.

[0016] By adopting the above scheme, during the process of the low-gear adjustment rod making linear motion along the axial direction of the low-gear adjustment port, the size of the flow gap between the low-gear adjustment rod and the inner wall of the low-gear air path can be adjusted, thereby adjusting the flow rate flowing to the air outlet.

[0017] In some embodiments, the low-gear adjustment rod includes a first shaft portion and a second shaft portion connected in sequence along the axial direction of the low-gear adjustment port, the shaft diameter of the first shaft portion is smaller than the shaft diameter of the second shaft portion, and a transition shaft portion is formed between the first shaft portion and the second shaft portion, the first shaft portion can extend into the low-gear air intake passage or the low-gear air outlet passage, and the flow gap is formed between the transition shaft portion and the inner wall of the low-gear air path passage; and since the outer surface of the transition shaft portion is a transition curved surface connecting the outer surfaces of the first shaft portion and the second shaft portion, when the low-gear adjustment rod moves along the axial direction of the low-gear adjustment port toward a direction away from the low-gear air intake passage or the low-gear air outlet passage, the size of the flow gap changes from small to large; when the low-gear adjustment rod moves along the axial direction of the low-gear adjustment port toward a direction close to the low-gear air intake passage or the low-gear air outlet passage, the size of the flow gap changes from large to small.

[0018] In some embodiments, a second sealing ring is provided between the low-range adjustment rod and the low-range adjustment port.

[0019] In some embodiments, the low-gear adjustment rod includes a third shaft portion arranged at an end of the second shaft portion away from the transition shaft portion, the shaft diameter of the third shaft portion is larger than the shaft diameter of the second shaft portion, and the outer wall of the third shaft portion abuts against the inner wall of the low-gear adjustment port; an annular groove is opened on the third shaft portion, and the second sealing ring is embedded in the annular groove; an interference fit is adopted between the second sealing ring and the low-gear adjustment port, so that the sealing between the second sealing ring and the low-gear adjustment port can be achieved, and the interference fit is adopted between the second sealing ring and the annular groove, so that the sealing between the second sealing ring and the resisting adjustment rod can be achieved, thereby ensuring the sealing between the resisting adjustment rod and the low-gear adjustment port to prevent airflow leakage, with high safety; and, since the second sealing ring is embedded in the annular groove of the resisting adjustment rod, the second sealing ring will move synchronously with the low-gear adjustment rod to prevent the second sealing ring from detaching from the low-gear adjustment rod, further ensuring the sealing between the resisting adjustment rod and the low-gear adjustment port.

[0020] In some embodiments, a mating portion capable of mating with an external structure is disposed at the rear end of the low-gear adjustment rod, so that the low-gear adjustment rod can perform linear motion along the axial direction of the low-gear adjustment port.

[0021] In some embodiments, the low-gear adjustment rod and the low-gear adjustment port are threadedly connected; the mating portion includes a cross slot, a slotted slot and other structures, and a common screwdriver can be used to conveniently screw the low-gear adjustment rod in or out, thereby adjusting the size of the flow gap formed between the low-gear adjustment rod and the low-gear air path, which is easy to operate.

[0022] In some embodiments, one of the low-speed air inlet channel and the low-speed air outlet channel is extended axially to form the low-speed adjustment port; the other of the low-speed air inlet channel and the low-speed air outlet channel is extended axially to form a process hole, and a plug is fitted in the process hole.

[0023] In some embodiments, the plug includes a steel ball, and an interference fit is adopted between the plug and the process hole. After the plug is assembled into the process hole, the process hole can be sealed, thereby ensuring the sealing of the low-grade air path channel, and the sealing performance is good.

[0024] With the above solution, the low-grade gas path is machined. Due to the manufacturing process, a process hole is usually formed. In order to block the process hole, the process hole can be sealed by the plug to ensure the sealing of the low-grade gas path.

[0025] In some embodiments, the transition chamber is located between the air inlet chamber and the air outlet chamber, and the air inlet chamber, the transition chamber and the air outlet chamber are interconnected; the low-grade air path channel can connect the transition chamber and the air outlet; and the sealing block can separate the air inlet chamber and the transition chamber.

[0026] In some embodiments, the valve body is further provided with a pilot flame air outlet communicating with the transition chamber.

[0027] In some embodiments, the gas valve also includes an intermediate sealing body and a first return spring mounted on the push rod, the first return spring is arranged between the intermediate sealing body and the tail of the push rod, the tail of the push rod is arranged at the end of the push rod away from the air outlet chamber, the first return spring can give the push rod a tendency to always move in a direction away from the air outlet chamber; and, the valve body is located between the transition chamber and the air outlet chamber and is provided with a first sealing ring, the push rod can cooperate with the first sealing ring to seal to separate the transition chamber and the air outlet chamber.

[0028] In some embodiments, the head of the push rod is provided with a bevel to serve as a guide so that the movement of the push rod is smoother, especially when the push rod is adapted to the inner hole of the first sealing ring, the bevel can enable the push rod to enter smoothly without scratching the inner hole of the first sealing ring; the tail of the push rod is a round shaft structure, and a notch is provided at one end of the tail of the push rod close to the middle sealing body to release the air pressure in the space formed between the tail of the push rod and the inner wall of the valve body.

[0029] By adopting the above scheme, when the push rod makes a linear motion along the axial direction of the air outlet cavity, the tail of the push rod cooperates with the inner wall of the valve body to move. Since the gap between the tail of the push rod and the inner wall of the valve body is relatively small, and when in use, due to the effect of grease, the tail of the push rod and the inner wall of the valve body will be in a sealed state, then when the push rod makes a linear motion, the air pressure in the space formed by the tail of the push rod and the inner wall of the valve body is also changing. The setting of the notch can release the air pressure in the space formed between the tail of the push rod and the inner wall of the valve body, which has high safety.

[0030] In some embodiments, a second return spring is provided between the valve core and the sealing block, and the second return spring can give the valve core a tendency to always move toward a direction close to the transition chamber.

[0031] The working principle of this utility model:

[0032] Closed state: when there is no external force acting on the push rod, the push rod is in a state of being farthest away from the air inlet chamber under the action of the first return spring; and the valve core of the solenoid valve, under the action of the second return spring, drives the sealing block to seal and isolate the air inlet chamber and the transition chamber. At this time, the air inlet chamber is a sealed and closed space, and the gas valve is in a closed state;

[0033] Ignition state: the push rod is pushed in an appropriate manner to move along the axial direction of the air outlet cavity toward the air inlet cavity, until the head of the push rod pushes the sealing block so that the solenoid valve reaches the closed position, and the second return spring is compressed. At this time, the air inlet cavity is connected with the transition cavity, and the transition cavity is connected with the pilot flame outlet, so that ignition can be performed;

[0034] Low-speed state: after the flame is ignited, a thermoelectric potential is generated by an external thermocouple under the action of the flame, and the generated thermoelectric potential can maintain the solenoid valve in the attracted state; after the flame is ignited, the push rod is relaxed at this time, and under the action of the first return spring, the push rod moves along the axial direction of the air outlet cavity in the direction away from the air inlet cavity, before the push rod is separated from the first sealing ring, at this time, the push rod and the first sealing ring are still in a sealed state, because the air inlet cavity is connected to the transition cavity, and the transition cavity is connected to the low-speed gas path channel, then after the gas in the air inlet cavity enters the transition cavity, it can enter the air outlet through the low-speed gas path channel for combustion by the gas fireplace burner, and this is the low-speed flow state;

[0035] High-speed state: after entering the low-speed state, the push rod continues to be relaxed. Under the action of the first return spring, the push rod continues to move along the axial direction of the air outlet cavity toward the direction away from the air inlet cavity until the push rod is out of contact with the first sealing ring. Then, the transition cavity and the air outlet cavity are connected. After the gas in the air inlet cavity enters the transition cavity, it can enter the air outlet through the air outlet cavity. Moreover, the caliber of this air path is much larger than the caliber of the low-speed air path channel, and a larger airflow will be formed to flow to the main air outlet, which is the high-speed flow state;

[0036] Since the tail end of the low-gear adjustment port is connected to the outside, that is, the tail end of the low-gear adjustment rod is connected to the outside of the valve body, appropriate tools can be used to conveniently adjust the depth of the low-gear adjustment rod screwed into the low-gear adjustment port, thereby adjusting the size of the flow gap formed between the low-gear adjustment rod and the low-gear air path channel, thereby achieving the adjustment of the flow rate flowing through the low-gear air path channel to the air outlet.

[0037] (III) Beneficial effects

[0038] Compared with the prior art, the utility model designs a gas valve with an adjustable low-speed flow channel;

[0039] (1) The utility model can realize a low-speed working state by providing a low-speed air passage; by providing a low-speed adjusting rod in the low-speed air passage, the low-speed adjusting rod can be adjusted as needed, thereby adjusting the size of the flow gap between the low-speed adjusting rod and the inner wall of the low-speed air passage, and then adjusting the flow size flowing to the air outlet. The utility model has a simple structure and is easy to adjust. It can meet the different low-speed flow requirements of different products and has a wider adaptability.

[0040] (2) According to the utility model, before the push rod is out of contact with the first sealing ring, the transition chamber and the air outlet can only be connected through the low-speed air path. The low-speed position of the push rod is wider. Even if the positioning is not very accurate during the process of relaxing the push rod, a stable low-speed flow rate that meets the requirements can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a schematic isometric cross-sectional view of a gas valve with an adjustable low-speed flow passage according to the first embodiment;

[0043] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0044] Figure 3 It is an exploded sectional schematic diagram of a gas valve with an adjustable low-speed flow passage according to the first embodiment;

[0045] Figure 4 It is a three-dimensional exploded schematic diagram of a gas valve with an adjustable low-speed flow channel according to the first embodiment;

[0046] Figure 5 A cross-sectional view of a gas valve with an adjustable low-speed flow passage in a closed state according to Embodiment 1;

[0047] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0048] Figure 7 It is a cross-sectional view of a gas valve with an adjustable low-speed flow passage in the first embodiment in an ignition state;

[0049] Figure 8 It is a cross-sectional view of a gas valve with an adjustable low-speed flow passage in a low-speed state according to the first embodiment;

[0050] Fig. 9 A cross-sectional view of a gas valve with an adjustable low-range flow passage in embodiment 1 in a high-range state;

[0051] Fig.10 This is a cross-sectional view of a gas valve with an adjustable low-speed flow channel in a closed state according to Embodiment 2.

[0052] The names of the components corresponding to the reference numerals in the figure are: 100, valve body; 101, air inlet cavity; 102, air outlet cavity; 103, air inlet port; 104, air outlet port; 105, low-grade air passage; 105a, low-grade air inlet passage; 105b, low-grade air outlet passage; 106, low-grade regulating port; 107, process hole; 108, transition cavity; 109, long-fire air outlet port; 110, first sealing ring; 200, push rod; 201, intermediate sealing body; 202, first return spring; 20 3. The tail of the push rod; 204. The head of the push rod; 205. The inclined surface; 206. The notch; 300. The solenoid valve; 301. The valve core; 302. The sealing block; 303. The second return spring; 400. The low-speed adjustment rod; 401. The first shaft portion; 402. The second shaft portion; 403. The transition shaft portion; 404. The tail end of the low-speed adjustment rod; 404a. The matching portion; 405. The third shaft portion; 405a. The annular groove; 500. The flow gap; 600. The second sealing ring; 700. The plug. DETAILED DESCRIPTION

[0053] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0054] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0056] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0057] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0058] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0059] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0060] Embodiment 1:

[0061] like Figure 1-Figure 9 As shown, the utility model provides a gas valve with an adjustable low-speed flow channel, the gas valve includes a valve body 100, the interior of which is provided with an air inlet chamber 101, a transition chamber 108 and an air outlet chamber 102 connected in sequence; and the valve body 100 includes an air inlet 103 connected to the air inlet chamber 101, and an air outlet 104 connected to the air outlet chamber 102; a push rod 200, which is arranged in the air outlet chamber 102 and can move linearly along the axial direction of the air outlet chamber 102; an electromagnetic valve 300, which is arranged at one end of the valve body 100 close to the air inlet chamber 101, and the electromagnetic valve 300 includes a valve core 301 that can move linearly along the axial direction of the air inlet chamber 101, and a valve core 301 connected to one end of the valve core 301 close to the air outlet chamber 102. A sealing block 302 is provided, and the sealing block 302 can separate the transition chamber 108 from the air outlet chamber 102; wherein, the valve body 100 is provided with a first sealing ring 110 that can cooperate with the push rod 200 for sealing, and the first sealing ring (110) can separate the transition chamber 108 from the air outlet chamber 102; the valve body 100 is provided with a low-grade air path channel 105 that can connect the transition chamber 108 and the air outlet 104, and the low-grade air path channel 105 is provided with a low-grade adjustment rod 400, and a flow gap 500 is formed between the low-grade adjustment rod 400 and the inner wall of the low-grade air path channel 105; the low-grade adjustment rod 400 is movably arranged in the low-grade air path channel 105 to adjust the size of the flow gap 500. By adopting the above scheme, a low-gear working state can be achieved by setting up a low-gear air path channel 105; by setting up a low-gear adjustment rod 400 in the low-gear air path channel 105, the low-gear adjustment rod 400 can be adjusted as needed, thereby adjusting the size of the flow gap 500 between the low-gear adjustment rod 400 and the inner wall of the low-gear air path channel 105, and then adjusting the flow rate flowing to the air outlet 104.

[0062] In some embodiments, the low-grade gas path channel 105 includes a low-grade air inlet channel 105a connected to the transition chamber 108, and a low-grade air outlet channel 105b connected to the air outlet 104, wherein the low-grade air inlet channel 105a and the low-grade air outlet channel 105b are perpendicular to each other; the low-grade air outlet channel 105b extends along the axial direction to form a low-grade adjustment port 106, and the low-grade adjustment rod 400 is disposed in the low-grade adjustment port 106 and can perform linear motion along the axial direction of the low-grade adjustment port 106. With the above solution, during the process of the low-grade adjustment rod 400 performing linear motion along the axial direction of the low-grade adjustment port 106, the size of the flow gap 500 between the low-grade adjustment rod 400 and the inner wall of the low-grade gas path channel 105 can be adjusted, thereby adjusting the flow size to the air outlet 104. In some embodiments, the low-gear adjustment lever 400 includes a first shaft portion 401 and a second shaft portion 402 connected in sequence along the axial direction of the low-gear adjustment port 106, the shaft diameter of the first shaft portion 401 is smaller than the shaft diameter of the second shaft portion 402, and a transition shaft portion 403 is formed between the first shaft portion 401 and the second shaft portion 402, the first shaft portion 401 can extend into the low-gear air outlet channel 105b, and the flow gap is formed between the transition shaft portion 403 and the inner wall of the low-gear air path channel 105. and since the outer surface of the transition shaft portion 403 is a transition curved surface connecting the outer surfaces of the first shaft portion 401 and the second shaft portion 402, when the low-gear adjustment rod 400 moves along the axial direction of the low-gear adjustment port 106 toward a direction away from the low-gear air outlet channel 105b, the size of the flow gap 500 changes from small to large; when the low-gear adjustment rod 400 moves along the axial direction of the low-gear adjustment port 106 toward the low-gear air outlet channel 105b, the size of the flow gap 500 changes from large to small.

[0063] In some embodiments, a second sealing ring 600 is provided between the low-gear adjustment rod 400 and the low-gear adjustment port 106. In some embodiments, the low-gear adjustment rod 400 includes a third shaft portion 405 provided at one end of the second shaft portion 402 away from the transition shaft portion 403, the shaft diameter of the third shaft portion 405 is larger than the shaft diameter of the second shaft portion 402, and the outer wall of the third shaft portion 405 abuts against the inner wall of the low-gear adjustment port 106; an annular groove 405a is provided on the third shaft portion 405, and the second sealing ring 600 is embedded in the annular groove 405a; an interference fit is adopted between the second sealing ring 600 and the low-gear adjustment port 106, so that the sealing between the second sealing ring 600 and the low-gear adjustment port 106 can be achieved, The second sealing ring 600 and the annular groove 405a are fitted with an interference fit, so that the sealing between the second sealing ring 600 and the resisting adjustment rod 400 can be achieved, thereby ensuring the sealing between the resisting adjustment rod 400 and the low-gear adjustment port 106 to prevent airflow leakage, which is highly safe; and the second sealing ring 600 is embedded in the annular groove 405a, so that the second sealing ring 600 will move synchronously with the low-gear adjustment rod 400 to prevent the second sealing ring 600 from detaching from the low-gear adjustment rod 400, further ensuring the sealing between the resisting adjustment rod and the low-gear adjustment port 106. In some embodiments, the tail end 404 of the low-gear adjustment rod 400 is provided with a matching portion 404a that can match with an external structure, so that the low-gear adjustment rod 400 can move linearly along the axial direction of the low-gear adjustment port 106. In some embodiments, the low-gear adjustment rod 400 and the low-gear adjustment port 106 are threadedly connected; the mating portion 404a is a slotted groove, and a common screwdriver can be used to conveniently screw the low-gear adjustment rod 400 in or out, thereby adjusting the size of the flow gap 500 formed between the low-gear adjustment rod 400 and the low-gear air path channel 105, which is easy to operate.

[0064] In some embodiments, the low-grade air outlet channel 105b is formed with the low-grade regulating port 106 along the axial extension; the low-grade air inlet channel 105a is formed with a process hole 107 along the axial extension, and a plug 700 is adapted in the process hole 107. In some embodiments, the plug 700 is a steel ball, and an interference fit is adopted between the plug 700 and the process hole 107. After the plug 700 is assembled into the process hole 107, the process hole 107 can be sealed, thereby ensuring the sealing of the low-grade air path channel 105, and the sealing is good. With the above scheme, the low-grade air path channel 105 is machined and formed. Due to the process manufacturing reasons, a process hole 107 is usually formed. In order to block the process hole 107, the process hole 107 can be blocked by the plug 700 to ensure the sealing of the low-grade air path channel 105.

[0065] In some embodiments, the transition chamber 108 is disposed between the air inlet chamber 101 and the air outlet chamber 102, and the air inlet chamber 101, the transition chamber 108 and the air outlet chamber 102 are interconnected; the low-grade air passage 105 can connect the transition chamber 108 and the air outlet 104; the sealing block 302 can separate the air inlet chamber 101 from the transition chamber 108. In some embodiments, the valve body 100 is further provided with a pilot flame air outlet 109 that is connected to the transition chamber 108. In some embodiments, the gas valve also includes an intermediate sealing body 201 and a first return spring 202 which are sleeved on the push rod 200. The first return spring 202 is arranged between the intermediate sealing body 201 and the tail 203 of the push rod 200. The tail 203 of the push rod 200 is arranged at the end of the push rod 200 away from the air outlet chamber 102. The first return spring 202 can give the push rod 200 a tendency to always move in a direction away from the air outlet chamber 102. In addition, the valve body 100 is located between the transition chamber 108 and the air outlet chamber 102 and is provided with a first sealing ring 110. The push rod 200 can cooperate with the first sealing ring 110 to seal to separate the transition chamber 108 and the air outlet chamber 102. In some embodiments, the head 204 of the push rod 200 is provided with a bevel 205, which plays a guiding role so that the movement of the push rod 200 is smoother, especially when the push rod 200 is adapted to the inner hole of the first sealing ring 110, the bevel 205 can enable the push rod 200 to enter smoothly without scratching the inner hole of the first sealing ring 110; the tail 203 of the push rod 200 is a round shaft structure, and a notch 206 is provided at one end of the tail 203 of the push rod 200 close to the middle sealing body 201 to release the air pressure in the space formed between the tail 203 of the push rod 200 and the inner wall of the valve body 100. By adopting the above scheme, when the push rod 200 makes a linear motion along the axial direction of the air outlet cavity 102, the tail 203 of the push rod 200 cooperates with the inner wall of the valve body 100 to move. Since the gap between the tail 203 of the push rod 200 and the inner wall of the valve body 100 is relatively small, and when in use, due to the effect of grease, the tail 203 of the push rod 200 and the inner wall of the valve body 100 will be in a sealed state, then, when the push rod 200 makes a linear motion, the air pressure in the space formed between the tail 203 of the push rod 200 and the inner wall of the valve body 100 is also changing. The setting of the notch 206 can release the air pressure in the space formed between the tail 203 of the push rod 200 and the inner wall of the valve body 100, which has high safety.In some embodiments, a second return spring 303 is disposed between the valve core 301 and the sealing block 302 , and the second return spring 303 can give the valve core 301 a tendency to always move toward a direction close to the transition chamber 108 .

[0066] The working principle of this utility model:

[0067] Closed state: when there is no external force acting on the push rod 200, the push rod 200 is in a state of being farthest away from the air inlet chamber 101 under the action of the first return spring 202; and the valve core 301 of the solenoid valve 300, under the action of the second return spring 303, drives the sealing block 302 to seal and isolate the air inlet chamber 101 and the transition chamber 108, so that the air inlet chamber 101 is a sealed and closed space, and the gas valve is in a closed state;

[0068] Ignition state: the push rod 200 is pushed in an appropriate manner to move along the axial direction of the air outlet cavity 102 toward the air inlet cavity 101, until the head 204 of the push rod 200 pushes the sealing block 302 so that the solenoid valve 300 reaches the closed position, and the second return spring 303 is compressed. At this time, the air inlet cavity 101 is connected with the transition cavity 108, and the transition cavity 108 is connected with the pilot flame air outlet 109, so that ignition can be performed;

[0069] Low-speed state: after the flame is ignited, a thermoelectric potential is generated by an external thermocouple under the action of the flame, and the generated thermoelectric potential can maintain the solenoid valve 300 in the attracted state; after the flame is ignited, the push rod 200 is relaxed at this time, and under the action of the first return spring 202, the push rod 200 moves along the axial direction of the air outlet cavity 102 in the direction away from the air inlet cavity 101, before the push rod 200 is separated from the first sealing ring 110, at this time, the push rod 200 and the first sealing ring 110 are still in a sealed state, because the air inlet cavity 101 is connected with the transition cavity 108, and the transition cavity 108 is connected with the low-speed gas path channel 105, then after the gas in the air inlet cavity 101 enters the transition cavity 108, it can enter the air outlet 104 through the low-speed gas path channel 105 for combustion by the gas fireplace burner, and it is in the low-speed flow state;

[0070] High-speed state: after entering the low-speed state, the push rod 200 is continuously relaxed. Under the action of the first return spring 202, the push rod 200 continues to move along the axial direction of the air outlet cavity 102 in the direction away from the air inlet cavity 101 until the push rod 200 is out of contact with the first sealing ring 110. Then, the transition cavity 108 is connected to the air outlet cavity 102. After the gas in the air inlet cavity 101 enters the transition cavity 108, it can enter the air outlet 104 through the air outlet cavity 102. Moreover, the caliber of this air path is much larger than the caliber of the low-speed air path 105, so a larger airflow will be formed to flow to the main air outlet 104, which is the high-speed flow state;

[0071] Since the tail end of the low-gear adjustment port 106 is connected to the outside, that is, the tail end 404 of the low-gear adjustment rod 400 is connected to the outside of the valve body 100, appropriate tools can be used to conveniently adjust the depth of the low-gear adjustment rod 400 screwed into the low-gear adjustment port 106, thereby adjusting the size of the flow gap 500 formed between the low-gear adjustment rod 400 and the low-gear air path channel 105, thereby achieving the adjustment of the flow rate flowing through the low-gear air path channel 105 to the air outlet 104.

[0072] Embodiment 2:

[0073] like Fig.10 As shown, the difference between this embodiment and the above-mentioned embodiment 1 is that;

[0074] The low-grade air inlet passage 105 a of the present embodiment is extended along the axial direction to form a low-grade regulating port 106 ; the low-grade air outlet passage 105 b is extended along the axial direction to form a process hole 107 .

[0075] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0076] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A gas valve with an adjustable low-range flow channel, characterized in that: The gas valve comprises A valve body (100) is provided with an air inlet cavity (101), a transition cavity (108) and an air outlet cavity (102) connected in sequence therein; and the valve body (100) comprises an air inlet (103) communicating with the air inlet cavity (101), and an air outlet (104) communicating with the air outlet cavity (102); A push rod (200), which is disposed in the air outlet cavity (102) and can move linearly along the axial direction of the air outlet cavity (102); A solenoid valve (300) is arranged at one end of the valve body (100) close to the air inlet chamber (101), and the solenoid valve (300) comprises a valve core (301) capable of linear motion along the axial direction of the air inlet chamber (101), and a sealing block (302) connected to one end of the valve core (301) close to the air outlet chamber (102), wherein the sealing block (302) is capable of separating the air inlet chamber (101) from the transition chamber (108); The valve body (100) is provided with a first sealing ring (110) capable of cooperating with the push rod (200) for sealing, and the first sealing ring (110) is capable of separating the transition chamber (108) and the air outlet chamber (102); the valve body (100) is provided with a low-speed air path channel (105) capable of connecting the transition chamber (108) and the air outlet (104), and the low-speed air path channel (105) is provided with a low-speed adjustment rod (400), and a flow gap (500) is formed between the low-speed adjustment rod (400) and the inner wall of the low-speed air path channel (105); the low-speed adjustment rod (400) is movably arranged in the low-speed air path channel (105) to adjust the size of the flow gap (500).

2. The gas valve with an adjustable low-speed flow passage according to claim 1, characterized in that: The low-gear air path channel (105) comprises a low-gear air inlet channel (105a) connected to the transition chamber (108), and a low-gear air outlet channel (105b) connected to the air outlet (104), wherein the low-gear air inlet channel (105a) and the low-gear air outlet channel (105b) intersect each other; the low-gear air inlet channel (105a) or the low-gear air outlet channel (105b) extends axially to form a low-gear adjustment port (106), and the low-gear adjustment rod (400) is disposed in the low-gear adjustment port (106) and can perform linear motion along the axial direction of the low-gear adjustment port (106).

3. The gas valve with an adjustable low-speed flow passage according to claim 2, characterized in that: The low-gear adjustment lever (400) comprises a first shaft portion (401) and a second shaft portion (402) which are sequentially connected along the axial direction of the low-gear adjustment port (106); the shaft diameter of the first shaft portion (401) is smaller than the shaft diameter of the second shaft portion (402); and a transition shaft portion (403) is formed between the first shaft portion (401) and the second shaft portion (402); the first shaft portion (401) can extend into the low-gear air inlet passage (105a) or the low-gear air outlet passage (105b); and the transition shaft portion (403) and the low-gear air passage (105a) are connected to each other. 5) is formed between the inner walls of the low-gear adjustment port (106); when the low-gear adjustment rod (400) moves along the axial direction of the low-gear adjustment port (106) in a direction away from the low-gear air intake passage (105a) or the low-gear air outlet passage (105b), the size of the flow gap (500) changes from small to large; when the low-gear adjustment rod (400) moves along the axial direction of the low-gear adjustment port (106) in a direction close to the low-gear air intake passage (105a) or the low-gear air outlet passage (105b), the size of the flow gap (500) changes from large to small.

4. The gas valve with an adjustable low-speed flow passage according to claim 2, characterized in that: A second sealing ring (600) is provided between the low-range adjustment rod (400) and the low-range adjustment port (106).

5. The gas valve with an adjustable low-range flow passage according to claim 2, characterized in that: The low-range adjustment rod (400) and the low-range adjustment port (106) are connected by threaded connection.

6. The gas valve with an adjustable low-range flow passage according to claim 2, characterized in that: The tail end (404) of the low-gear adjustment rod (400) is provided with a matching portion (404a) that can match with an external structure, so that the low-gear adjustment rod (400) can perform linear movement along the axial direction of the low-gear adjustment port (106).

7. The gas valve with an adjustable low-range flow passage according to claim 2, characterized in that: One of the low-grade air inlet channel (105a) and the low-grade air outlet channel (105b) is extended along the axial direction to form the low-grade regulating port (106); the other of the low-grade air inlet channel (105a) and the low-grade air outlet channel (105b) is extended along the axial direction to form a process hole (107), and a plug (700) is adapted in the process hole (107).

8. The gas valve with an adjustable low-range flow passage according to claim 1, characterized in that: The gas valve also includes an intermediate sealing body (201) and a first return spring (202) which are sleeved on the push rod (200); the first return spring (202) is arranged between the intermediate sealing body (201) and the tail portion (203) of the push rod (200); the tail portion (203) of the push rod (200) is arranged at one end of the push rod (200) away from the air outlet cavity (102); the first return spring (202) can give the push rod (200) a tendency to always move in a direction away from the air outlet cavity (102).

9. The gas valve with an adjustable low-range flow passage according to claim 1, characterized in that: The head (204) of the push rod (200) is provided with an inclined surface (205).

10. The gas valve with an adjustable low-range flow passage according to claim 1, characterized in that: The tail portion (203) of the push rod (200) is provided with a notch (206).

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