Pressure reducing valve and gas appliance

Abstract

The invention discloses a pressure reducing valve and a gas appliance. The pressure reducing valve comprises a valve body, the valve body comprises a pressure regulating part and a gas inlet part, the pressure regulating part is used for being connected with a stove end, and the gas inlet part and the pressure regulating part are integrally arranged; the pressure regulating structure comprises a diaphragm, a first elastic piece, a mandrel, a connecting rod and a sliding rod, the diaphragm, the first elastic piece and the mandrel are arranged in the pressure regulating part, the first end of the connecting rod and the mandrel are rotationally arranged, the middle of the connecting rod and the valve body are rotationally arranged, the second end of the connecting rod and the sliding rod are rotationally arranged, and the sliding rod is slidably arranged in the air inlet part; the connector is connected to the end, away from the pressure adjusting part, of the air inlet part and used for being connected with an air cylinder. According to the pressure reducing valve, the pressure regulating part and the air inlet part are integrally formed, so that the cost can be reduced, and the manufacturing efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, and in particular to a pressure reducing valve and a gas appliance. Background Art

[0002] A pressure reducing valve is a valve that automatically maintains a stable outlet pressure by adjusting the inlet pressure to the required outlet pressure and relying on the energy of the medium itself.

[0003] The valve body in the current technology includes two parts, a pressure regulating part connected to the gas appliance and a connecting part connected to the gas cylinder. The connecting part is usually made of copper material, which leads to a high cost of the pressure reducing valve. Summary of the Invention

[0004] In order to solve at least one of the problems existing in the above-mentioned prior art, according to one aspect of the present invention, a pressure reducing valve is provided, comprising:

[0005] The valve body includes a pressure regulating part and an air inlet part, wherein the pressure regulating part is used to connect to the stove end, and the air inlet part and the pressure regulating part are integrally arranged;

[0006] A pressure regulating structure comprising a diaphragm, a first elastic member, a core shaft, a connecting rod, and a sliding rod, wherein the diaphragm, the first elastic member, and the core shaft are disposed within the pressure regulating portion, a first end of the connecting rod is rotatably disposed with the core shaft, a middle portion is rotatably disposed with the valve body, and a second end is rotatably disposed with the sliding rod, and the sliding rod is slidably disposed within the air inlet portion;

[0007] A connector is connected to an end of the air inlet portion away from the pressure regulating portion and is configured to connect to the gas cylinder. In some embodiments, the connecting rod has a first pivot point relative to the sliding rod, and a first linear distance between the free end of the sliding rod and the first pivot point is L1. The connecting rod has a second pivot point relative to the core shaft, and a second linear distance between the first pivot point and the second pivot point is L2. The ratio of L1:L2 ranges from 0.5 to 2.5.

[0008] In some embodiments, the connecting rod has a first rotation point relative to the sliding rod, and the first straight-line distance between the free end of the sliding rod and the first rotation point is L1. The connecting rod has a second rotation point relative to the core shaft, and the second straight-line distance between the first rotation point and the second rotation point is L2, wherein the ratio range of L1:L2 is 0.5-2.5.

[0009] In some embodiments, the sliding rod is provided with a flow groove extending along its length direction.

[0010] In some embodiments, the connector comprises:

[0011] a housing, wherein the housing is provided with an air flow channel;

[0012] An over-flow protection structure is provided in the air flow channel. When the flow rate at the air inlet end of the connector is greater than a preset flow rate, the over-flow protection structure can at least reduce the flow rate of the air flow channel, and can open the air flow channel when the air pressure in the valve body reaches equilibrium.

[0013] In some embodiments, the pressure reducing valve further includes a first buffer member, and the first buffer member is provided at one end of the sliding rod facing the connector.

[0014] In some embodiments, the pressure reducing valve further includes a second buffer member and / or a third buffer member;

[0015] A through hole is provided at one end of the sliding rod connected to the connecting rod, the second end is passed through the through hole, the second buffer is provided on the inner wall of the through hole, and / or a third buffer is provided on the outer wall of the second end.

[0016] In some embodiments, the pressure reducing valve further includes an adjusting member, which is disposed in the air inlet portion, between the sliding rod and the connector, and is threadedly connected to the air inlet portion.

[0017] In some embodiments, the pressure reducing valve also includes a handwheel structure, which is rotatably installed outside the air inlet part and includes a detachable twisting handwheel and a threaded handwheel. The twisting handwheel is used to drive the threaded handwheel to rotate under the drive of an external force, and the threaded handwheel is used to connect to the gas cylinder.

[0018] Another aspect of the present invention provides a gas appliance comprising the above-mentioned pressure reducing valve.

[0019] In summary, the pressure reducing valve and gas appliance provided by the present invention have the following technical effects:

[0020] The pressure of the inlet and outlet gases is adjusted by the pressure regulating structure, and the gas cylinder is connected through a connector to realize the input of gas into the valve body. The gas inlet part and the pressure regulating part of the valve body are integrated into one unit:

[0021] (1) It avoids the subsequent threaded assembly of the air inlet and pressure regulating parts, thereby improving the molding efficiency of the entire pressure reducing valve;

[0022] (2) Due to the use of an integrated molding method, the molding accuracy of the entire valve body can be controlled, so that the size of the entire pressure reducing valve can be controlled within the range of standard length;

[0023] (3) Since the air inlet part and the pressure regulating part are made of the same material, the use of copper material is reduced and the molding cost of the entire pressure reducing valve is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of a pressure reducing valve in the prior art;

[0025] Figure 2 It is a structural schematic diagram of another pressure reducing valve in the prior art;

[0026] Figure 3 This is a schematic structural diagram of a pressure reducing valve according to a first embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of a pressure reducing valve according to a second embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a pressure reducing valve according to a third embodiment of the present invention;

[0029] Figure 6 for Figure 3 Schematic diagram of the installation method of the pressure reducing valve;

[0030] Figure 7 for Figure 3 Schematic diagram of the structure of the connecting rod and the sliding rod;

[0031] Figure 8 for Figure 7 Schematic cross-section of the connecting rod and the sliding rod;

[0032] Figure 9 for Figure 7 Schematic diagram of the structure of the slider in ;

[0033] Figure 10 for Figure 3 A schematic structural diagram of an embodiment of a connector in FIG.

[0034] Figure 11 for Figure 10 A schematic diagram of the structure of the blocking member;

[0035] Figure 12 for Figure 3 A schematic structural diagram of another embodiment of the connector;

[0036] Figure 13 for Figure 12 A schematic structural diagram of the blocking member, the first foaming component and the second foaming component;

[0037] Figure 14 FIG. 4 is a schematic structural diagram of a pressure reducing valve according to a fourth embodiment of the present invention.

[0038] Figures: 100-pressure reducing valve, 10-valve body, 11-pressure regulating part, 12-air inlet, 20-pressure regulating structure, 21-diaphragm, 22-first elastic member, 23-core shaft, 24-connecting rod, 241-first rotation point, 242-second rotation point, 25-sliding rod, 251-circulation groove, 252-through hole, 30-connector, 31-first connector, 311-glue groove, 32-second connector, 33-housing, 331-air flow channel, 3311-first section, 3312-second section, 332-air inlet end, 333-air outlet end, 334-auxiliary flow channel, 34-overflow protection structure, 341-second elastic member, 342-sealing part, 3421-installing section, 3422-sealing section, 3423-pressure relief channel, 3424-receiving chamber, 3425-first covering part, 3426-second covering part, 343-first sealing ring, 35-adjusting structure, 36-first foaming component, 361-first foaming agent, 362-first covering film, 37-second foaming component, 371-second foaming agent, 372-second covering film, 38-second sealing ring, 40-first buffer part, 50-second buffer part, 60-third buffer part, 70-adjusting part, 80-handwheel structure, 81-twisting handwheel, 82-threaded handwheel, 400-wrench. DETAILED DESCRIPTION

[0039] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Example 1

[0044] See also Figure 1, is a structural schematic diagram of a pressure reducing valve 200 in the prior art, including a valve body a and a pressure regulating structure provided in the valve body a, the pressure regulating structure including a flexible membrane b1, a spring b2, a core shaft b3 and a connecting rod b4, the valve body a includes a pressure regulating part a1 and an air inlet part a2, the pressure regulating part a1 has a valve cavity a11, and the pressure regulating part a1 is provided with a communication port a3 connected to the air inlet part a2, the flexible membrane b1 is installed in the valve cavity a11, dividing the valve cavity a11 into an upper cavity and a lower cavity, a spring b2 is installed between the flexible membrane b1 and the inner wall of the upper cavity, the core shaft b3 is connected to the flexible membrane b1, and the connecting rod b4 is provided in the lower cavity and is rotatably arranged with the valve body a, and is used to open or close the communication port a3 when the flexible membrane b1 vibrates.

[0045] Specifically, when the pressure reducing valve 200 is in use, the gas with higher pressure enters the lower cavity from the air inlet part a2, and the air flow will push the flexible membrane b1 to move upward and compress the adjusting spring b2, while driving the connecting rod b4 to rotate. As the air flow in the lower cavity enters, the air pressure in the lower cavity gradually increases, compressing the spring b2, and the connecting rod b4 will close the connecting port a3. As the gas is continuously discharged from the gas outlet, when the air pressure in the lower cavity decreases, under the action of the elastic force of the spring b2, and when the elastic force is greater than the thrust generated by the air pressure in the lower cavity, the flexible membrane b1 is pushed downward, and the connecting rod b4 is driven to open the connecting port a3. This reciprocating process makes the gas pressure flowing out of the gas outlet stable within the set range, thereby achieving the effect of stabilizing and reducing pressure.

[0046] However, in the prior art, when the valve body a is set, the pressure regulating part a1 and the air inlet part a2 are formed in a separate manner, and the two are connected by a thread, which has the following defects:

[0047] (1) The installation of valve body a is complicated and the molding efficiency is low;

[0048] (2) In order to ensure the stability of installation, a threaded section is reserved during the molding of the air inlet part a2. After installation, the threaded section is exposed, affecting the aesthetics. At the same time, the length of the reserved threaded section after connection is different, affecting the dimensional consistency of the entire valve body a.

[0049] (3) In order to ensure the sealing, the air inlet part a2 and the air inlet part a2 will be glued and tightened after being connected by threads. The glue will overflow onto the handwheel and affect the subsequent rotation of the handwheel;

[0050] (4) The air intake portion a2 is usually made of copper, which makes the molding cost of the valve body a high.

[0051] To solve the above technical problems, the first embodiment of the present invention provides a pressure reducing valve 100 to reduce the molding cost of the entire valve body 10 and ensure the installation accuracy and efficiency between the pressure regulating part 11 and the air inlet part 12 of the valve body 10.

[0052] For details of the pressure regulating unit 11 and the air inlet unit 12, please refer to Figures 3 to 5 , which is a pressure reducing valve 100 provided in the first embodiment of the present invention, includes a valve body 10, a pressure regulating structure 20 and a connector 30.

[0053] Among them, the valve body 10 includes a pressure regulating part 11 and an air inlet part 12. The pressure regulating part 11 is used to connect the stove end, and the air inlet part 12 and the pressure regulating part 11 are integrated; the pressure regulating structure 20 is arranged in the pressure regulating part 11, including a diaphragm 21, a first elastic part 22, a core shaft 23, a connecting rod 24 and a sliding rod 25. The diaphragm 21, the first elastic part 22 and the core shaft 23 are arranged in the pressure regulating part 11. The first end of the connecting rod 24 and the core shaft 23 are rotatably arranged, the middle part and the valve body 10 are rotatably arranged, and the second end and the sliding rod 25 are rotatably arranged. The sliding rod 25 is slidably arranged in the air inlet part 12; the connector 30 is connected to the end of the air inlet part 12 away from the pressure regulating part 11, and is used to be connected to the gas cylinder.

[0054] The pressure reducing valve 100 regulates the pressure of the inlet and outlet gases through the pressure regulating structure 20 and is connected to the gas cylinder through the connector 30 to realize the input of gas into the valve body 10. The air inlet portion 12 and the pressure regulating portion 11 of the valve body 10 are integrated into one body.

[0055] (1) The subsequent threaded assembly of the air inlet portion 12 and the pressure regulating portion 11 is avoided, thereby improving the molding efficiency of the entire pressure reducing valve 100;

[0056] (2) Due to the integrated molding method, the molding accuracy of the entire valve body 10 can be controlled, so that the size of the entire pressure reducing valve 100 can be controlled within the range of standard length;

[0057] (3) Since the air inlet portion 12 and the pressure regulating portion 11 are made of the same material, the use of copper material is reduced, and the molding cost of the entire pressure reducing valve 100 is reduced.

[0058] Example 2

[0059] Further, see Figures 3 to 5 , since when the connector 30 is connected to the air inlet part 12, in order to ensure the tightness of the connection, colloid will be injected between the two, in order to avoid colloid overflow, the connector 30 includes a first connector 31 and a second connector 32, the first connector 31 is provided with an external thread for connecting to the air inlet part 12, and the second connector 32 is located outside the air inlet part 12 and is used to connect to the gas cylinder, wherein the end of the first connector 31 connected to the second connector 32 is provided with a glue containing groove 311, so that through the setting of the glue containing groove 311, when the first connector 31 and the air inlet part 12 are sealed by the colloid, the colloid can overflow into the glue containing groove 311, avoiding overflow to the outside of the connector 30 and avoiding the influence of the hand wheel.

[0060] It can be understood that when the glue containing groove 311 is set on the first connecting head 31, a circle of glue containing grooves 311 can be set along the circumference of the first connecting head 31 to ensure the glue containing capacity; or in another embodiment, multiple glue containing grooves 311 can be set separately along the circumference of the first connecting head 31. In this way, not only the glue containing effect can be achieved, but also the structural strength of the first connecting head 31 can be ensured.

[0061] Example 3

[0062] See also Figure 2 , is a structural diagram of another pressure reducing valve 300 in the prior art, including a valve body m, a pressure regulating structure provided in the valve body m, a transition structure q provided on one side of the valve body m, and a connector o provided at one end of the transition structure q. The connector o is used to connect to the gas cylinder. The pressure regulating structure includes a flexible membrane n1, a first spring n2, a core shaft n3, a connecting rod n4, and a sliding rod n5. The valve body m includes a pressure regulating part m1 and an air inlet part m2. The air inlet part m2 is provided with a connecting thread, which is connected to the connecting section q1 of the transition structure q. The pressure part m1 has a valve chamber m11, and a flexible membrane n1 is installed in the valve chamber m11, dividing the valve chamber m11 into an upper chamber and a lower chamber. A first spring n2 is installed between the flexible membrane n1 and the inner wall of the upper chamber, the core shaft n3 is connected to the flexible membrane n1, and the connecting rod n4 is arranged in the lower chamber and is rotated with the valve body m to drive the sliding rod n5 to slide in the air intake part m2. When the flexible membrane n1 vibrates up and down, the connecting rod n4 is driven to rotate through the core shaft n3, and the sliding rod n5 is driven to slide, thereby achieving approaching or moving away from the connector o.

[0063] Specifically, when the pressure reducing valve 300 is in use, high-pressure gas enters the lower chamber from the intake portion m2. The airflow pushes the flexible membrane n1 upward, compressing the first regulating spring n2 and simultaneously driving the slide bar n5 to move closer to the transition structure q, thereby reducing the gas intake flow. When the gas pressure in the lower chamber becomes excessive, the slide bar n5 moves to close the outlet of the transition structure q, preventing the gas from entering the lower chamber. When the gas in the lower chamber flows out of the pressure regulating portion m1, the pressure in the lower chamber decreases. When the elastic force of the first spring n2 is greater than the thrust generated by the gas pressure in the lower chamber, the flexible membrane n1 is pushed downward and the slide bar n5 is driven away from the transition structure q, gradually opening the transition structure q. This reciprocating process stabilizes the gas pressure flowing out of the pressure regulating portion 11 within a set range, achieving the desired pressure stabilization and pressure reduction effect.

[0064] However, in the pressure reducing valve 300 in the prior art, the slide rod n5 is slidably arranged in the part where the air intake part m2 and the connecting section q1 are connected. The adapter structure q is also provided with a switch structure (the switch structure includes a button p1, a second spring p2 and a sealing ball p3) so that when the air intake pressure is too high, the air intake channel of the connector o is closed by the pressed sealing ball p3, and the switch structure can only be opened manually after closing. At the same time, since the entire adapter structure q has a certain extension length, the length of the connecting section q1 cannot be set too long to avoid the risk of breakage due to external force when the extension length of the entire adapter structure q is long. Therefore, since the length setting of the connecting section q1 is limited, the length of the slide rod n5 is also limited. It can be understood that the shorter slide rod n5 is less restricted in installation due to its shorter length and has lower installation accuracy. When the air flow in the adapter structure q flows over, the slide rod n5 has a greater freedom of movement and is prone to produce a buzzing sound.

[0065] Right now Figure 2 The corresponding pressure reducing valve 300 has the following technical problems:

[0066] (1) When used at overvoltage, the switch structure can only be opened manually after being manually closed, which is inconvenient to use;

[0067] (2) The length of the slider n5 is limited, which may cause buzzing during use;

[0068] (3) Since the length of the sliding rod n5 is short after being connected to the connecting rod n4, the intake air flow cannot be optimized through structural improvements.

[0069] On the basis of Example 1, in order to solve the above technical problems, please refer to Figure 4 and Figure 5 The connecting rod 24 has a first rotation point 241 relative to the sliding rod 25, and the first straight-line distance between the free end of the sliding rod 25 and the first rotation point 241 is L1. The connecting rod 24 has a second rotation point 242 relative to the core shaft 23, and the second straight-line distance between the first rotation point 241 and the second rotation point 242 is L2, wherein the ratio range of L1:L2 is 0.5-2.5.

[0070] When the ratio of L1:L2 is less than 0.5, the length of the slide bar 25 is shorter, for example Figure 4As shown, the slide rod 25 has low installation precision and high freedom of movement. Under extreme external conditions, such as strong vibration and impact, the slide rod 25 is easy to come out, resulting in loss of pressure regulation function. The valve body 10 becomes a straight-through state (i.e., a state without pressure reduction). The valve cavity pressure will instantly increase to the same as the high pressure of the gas cylinder (e.g., about 1 MPa). However, the gas pressure of the gas appliance connected to the rear end of the valve is low (about 4 kPa). At this time, the gas pressure of the gas appliance instantly increases by 250 times. The various connection points and the gas appliance at the rear end of the valve cannot withstand such high pressure, which will cause a large amount of gas leakage or even disintegration of the interface, causing the risk of gas explosion safety accidents.

[0071] In addition, if the ratio of L1:L2 is less than 0.5, the length L3 of the first connector 31 connecting the connector 30 and the air inlet portion 12 needs to be very long, that is, it needs to be screwed into the air inlet portion 12 very deeply to be as close to the slide rod 25 as possible. At this time, the matching thread processing requirements of the first connector 31 and the air inlet portion 12 are extremely high. Any slight deviation will cause the first connector 31 to be unable to be screwed in, or even if it is screwed in, it is very easy to deflect. When the slide rod 25 seals the air outlet of the first connector 31, it will cause poor sealing problems, which seriously affect the normal function of the valve body 10.

[0072] See also Figure 5 When the ratio of L1:L2 is greater than 2.5, the extended length of the slide rod 25 is extremely long, placing extremely high demands on the machining of the mating inner hole of the air inlet portion 12. Even the slightest deviation can prevent the slide rod 25 from being installed, or even if it is installed, it will easily deviate, causing friction with the inner cavity of the air inlet portion 12 during use, thus affecting the normal function of the pressure reducing valve 100. Furthermore, within the predetermined length range of the air inlet portion 12, the long slide rod 25 occupies the threads of the air inlet portion 12, resulting in a very short connection length L3 of the first connector 31 of the connector 30, affecting the connection stability of the connection area. To ensure sufficient threading length for the first connector 31, the air inlet portion 12 must be lengthened, which not only increases unnecessary material costs, but also causes the overly long pressure regulating portion 11 to cause the overall length center of the pressure reducing valve 100 to be unbalanced, resulting in insufficient overall strength and easy breakage under unforeseen external forces, leading to large-scale gas leakage and gas explosion accidents.

[0073] Therefore, the ratio of L1:L2 should be controlled within the range of 0.5-2.5 times, which not only ensures the installation accuracy, but also keeps the cost of the entire valve within the preset range.

[0074] In summary, the pressure regulating portion 11 and the air inlet portion 12 of the valve body 10 are formed in one piece, which reduces Figure 1 Neutralization Figure 2At the same time, since the pressure regulating part 11 and the air inlet part 12 are configured as an integral part, the length of the slide rod 25 and the length of the first connecting head 31 can be set as needed to ensure the stability of the use of the slide rod 25 and the air intake volume.

[0075] Example 4

[0076] Based on Example 2, please refer to Figures 7 to 9 In order to solve the problem of air intake flow described in the second embodiment, the slide bar 25 of this embodiment is provided with a flow groove 251 extending along its length. Thus, by providing the flow groove 251, the gas not only flows into the pressure regulating part 11 from between the slide bar 25 and the inner wall of the air intake part 12, but also flows into the pressure regulating part 11 through the flow groove 251, thereby increasing the volume of gas flowing in and the air intake amount, thereby improving the performance of the entire pressure reducing valve 100. Figure 1 In the prior art, if the air intake volume of the valve body 10 is to be increased, for example, if the air intake volume is adjusted to 1.5 times the original volume, the connecting port a3 needs to be enlarged to 1.5 times the original volume. In order to ensure the sealing performance, the sealing part of the connecting rod b4 needs to be enlarged. Correspondingly, the volume of the pressure regulating part a1 needs to be increased, resulting in an increase in the size of the entire valve. Figure 2 In the prior art slide bar n5 method, due to Figure 2 The length of the slide rod n5 is relatively short, and a through hole matching the connecting rod 24 needs to be provided on the slide rod 25. In order to ensure the structural strength of the slide rod 25, Figure 2 The adjustable space of the slide bar n5 is very small, and it is difficult to set the flow groove on the slide bar 25. Therefore, a large flow pressure reducing valve 100 cannot be realized.

[0077] In this way, in this embodiment, by setting the flow groove 251 on the slide rod 25, not only can a large-flow pressure reducing valve 100 be realized, but since the flow of the valve is guaranteed, the miniaturization of the entire pressure reducing valve 100 can also be realized. At the same time, a large flow can be achieved, thereby improving the practical performance of the pressure reducing valve 100.

[0078] Example 5

[0079] See also Figures 10 to 13On the basis of embodiments one to four, the connector 30 of this embodiment includes a shell 33, and the shell 33 is provided with an air flow channel 331, which has an air inlet end 322 and an air outlet end 333; an overflow protection structure 34 is provided in the air flow channel 331, and the overflow protection structure 34 can at least reduce the flow volume of the air flow channel 331 when the pressure at the air inlet end 332 of the connector 30 is greater than the preset pressure, and can open the air flow channel 331 when the air pressure in the valve body 10 reaches equilibrium, that is, the connector 30 of this embodiment not only realizes the connection function, but also can realize the protection function under the condition of overflow, and further, can automatically restore the opening of the gas flow channel when the air pressure in the valve body 10 reaches equilibrium, avoiding manual method and facilitating user use.

[0080] Specifically, the over-flow protection structure 34 includes a second elastic member 341 and a blocking member 342. When the air flow rate of the air inlet end 332 is greater than the preset flow rate, the second elastic member 341 is driven to undergo elastic deformation to at least achieve a reduction in the flow rate of the air flow channel 331. In one embodiment, it means that the flow rate of the air flow channel 331 is reduced to a percentage of the original value. In another embodiment, it may mean that the flow rate of the air flow channel 331 is reduced to 0.

[0081] In one embodiment, see Figure 10 The air flow channel 331 includes a first section 3311 and a second section 3312, and the inner diameter of the first section 3311 is smaller than the inner diameter of the second section 3312; the second elastic member 341 is provided on the first section 3311, and the blocking member 342 is movably provided on the second section 3312, and is used for moving toward the first section 3311 under the push of air pressure when the intake flow rate of the intake end 322 is greater than the preset flow rate, so as to block the opening of the first section 3311 toward the second section 3312, thereby achieving the blocking of the air flow channel 331.

[0082] See also Figure 11 In one embodiment, the blocking member 342 can be provided with a mounting section 3421 and a blocking section 3422 having different outer diameters. The mounting section 3421 can move between the first section 3311 and the second section 3312. When under high pressure, the airflow pushes the blocking section 3422 to press against the end surface of the first section 3311 toward the second section 3312, thereby blocking the airflow channel 331 and compressing the second elastic member 341 at the same time.

[0083] It is understandable that the first sealing ring 343 can be sleeved on the installation section 3421, and a stable sealing effect can be achieved through the abutment between the first sealing ring 343 and the end surface of the first section 3311 facing the second section 3312.

[0084] Furthermore, when it is necessary to achieve internal air pressure balance after blocking, the blocking member 342 is provided with a pressure relief channel 3423 arranged along the extension direction of the air flow channel 331. When the first sealing ring 343 blocks the gas flow channel, the pressure relief channel 3423 can flow the gas flowing into the air inlet end 332 into the first section 3311. At this time, the air pressure in the first section 3311 is increasing. Since the gas can only flow out in the direction of the air outlet end 333 through the pressure relief channel 3423, and the size of the pressure relief channel 3423 is very small, the fire of the gas stove is The amount becomes very small, and the user will turn off the gas stove, but the gas cylinder is in an open state. The pressure relief channel 3423 can flow the gas flowing into the air inlet end 332 into the first section 3311, and the air pressure in the shell 33 is gradually increasing. When the air pressure in the connector 30 reaches equilibrium, the second elastic member 341 has an elastic force, and at this time, an elastic force is applied to the sealing member 342 to push the first sealing ring 343 away from the first section 3311. At this time, the connector 30 can be supplied with gas normally, thereby achieving an automatic reset effect, which is convenient for users to use.

[0085] In another embodiment, see Figure 12 and Figure 13 The blocking member 342 can be set as a spherical blocking member 342. The spherical blocking member 342 and the side wall of the airflow channel 331 are in arc contact and have a small contact area. When the gas pressure pushes the spherical blocking member 342 to move, the friction resistance between the spherical blocking member 342 and the side wall of the airflow channel 331 is small, which facilitates the blocking member 342 to push the elastic member to move.

[0086] When the blocking member 342 is set to a spherical blocking member 342, in order to achieve a self-recovery effect, an auxiliary flow channel 334 is provided on the shell 33, and the connector 30 further includes an adjustment structure 35. The auxiliary flow channel 334 is connected between the first section 3311 and the second section 3312. The adjustment structure 35 is adjustably provided on the auxiliary flow channel 334, and is used to adjust the flow rate of the gas from the first section 3311 to the second section 3312 after the blocking member 342 blocks the opening of the first section 3311, and the flow rate of the auxiliary flow channel 334 is much smaller than that of the gas flow channel 331. When the sealing member 342 seals the first section 3311, the gas flowing in from the air inlet end 332 enters the second section 3312, flows into the first section 3311 through the auxiliary flow channel 334, and flows out through the air outlet end 333. At this time, the fire on the stove end is very small, and the user will turn off the gas stove, but the gas cylinder is in an open state, and the gas can still continue to flow into the connector 30. When the air pressure in the connector 30 reaches equilibrium, the elastic force of the second elastic member 341 drives the sealing member 342 to return to its original position to open the opening of the first section 3311.

[0087] The regulating structure 35 is used to regulate the flow volume of the auxiliary flow channel 334 so as to adjust the time it takes for the blocking member 342 to return to its original position.

[0088] Further, see Figure 13 In one embodiment, when a spherical blocking member 342 is used, a receiving cavity 3424 is provided in the blocking member 342, and the blocking member 342 is a plastic member that can melt when the temperature of the external environment is greater than a preset temperature; the connector 30 further includes a first foaming component 36 and a second foaming component 37, which are arranged in the receiving cavity 3424. The melting points of the first foaming component 36 and the second foaming component 37 are both lower than the melting point of the blocking member 342, and can be set to a preset temperature, such as 80 degrees. When the ambient temperature is greater than the preset temperature, the first foaming component 36 and the second foaming component 37 gradually melt, and the first foaming component 36 and the second foaming component 37 are used to foam after mixing to block the airflow channel 331, so that the first foaming component 36 and the second foaming component 37 are also provided in the blocking member 342. In the manner of the second foaming component 37, as the external environment rises, the first foaming component 36 and the second foaming component 37 melt first, and then the sealing component 342 located on the outside gradually softens. Under the blowing of the air pressure at the air inlet end 332, the sealing component 342 rolls in the air flow channel 331, and the first foaming component 36 and the second foaming component 37 are accelerated to mix and foam and expand. As the ambient temperature continues to rise, it reaches the melting point of the sealing component 342, and the sealing component 342 melts and fills the air flow channel 331. The first foaming component 36 and the second foaming component 37 foam and expand and continue to fill the air flow channel 331, blocking the remaining small gap between the sealing component 342 and the air flow channel 331, thereby achieving double blocking of the air flow channel 331 and ensuring the sealing of the blocking. At this time, no gas flows out of the air outlet, and over-temperature protection is achieved.

[0089] That is, the overcurrent protection structure of this embodiment also has the effect of overtemperature protection.

[0090] Among them, the first foaming component 36 of this embodiment includes a first foaming agent 361 and a first coating film 362 coated on the outside of the first foaming agent 361; the second foaming component 37 includes a second foaming agent 371 and a second coating film 372 coated on the outside of the second foaming agent 371; the melting points of the first coating film 362 and the second coating film 372 are both lower than the melting point of the blocking member 342, wherein the melting points of the first coating film 362 and the second coating film 372 can be the same or different. When the melting points of the two can be set to be the same, this The preset temperature can be set to 80°C; when the melting points of the two are different, the melting point of one can be set to the preset temperature, and the melting point of the other can be set to slightly greater than the preset temperature. In this way, as the ambient temperature rises, when the preset temperature is reached, the first coating film 362 and the second coating film 372 melt first, so that the first foaming agent 361 and the second foaming agent 371 inside can be mixed and foamed. Further, as the ambient temperature rises, the sealing member 342 melts, and at this time the foamed material is sealed in the air flow channel.

[0091] In some embodiments, the material of the first coating film 362 and the second coating film 372 is polyurethane, and the material of the first foaming agent 361 includes: polyether polyol, polymer polyol, polyether carbonate, catalyst, and flame retardant; the material of the second foaming agent 371 includes isocyanate. The sealing piece 342 of this embodiment can be set to polypropylene. When the external environment reaches 80°C, the first coating film 362 and the second coating film 372 gradually melt, and the sealing piece 342 gradually softens. As the ambient temperature continues to rise, for example, reaching about 115°C-150°C, the sealing piece 342 will gradually melt and become fluid, and fill in the airflow channel 331, thereby achieving a sealing effect; at the same time, as the sealing piece 342 melts, the first foaming agent 361 and the first foaming agent 361 mix and foam, and the volume expands and becomes larger and fills in the airflow channel 331, achieving a tighter sealing effect.

[0092] Furthermore, the weight ratio of the first foaming agent 361 to the second foaming agent 371 of this embodiment is in the range of 1:1-1:2. In this way, by setting this mass ratio, the two foaming agents can achieve the effect of rapid mixing and foaming, for example, rapid foaming can be achieved within 3-5 minutes, and the gas flow channel can be quickly blocked, so that the user can have time to escape.

[0093] The blocking member 342 of this embodiment can be made of polypropylene. When the external environment reaches 80° C., the blocking member 342 gradually softens, but has not yet reached the melting point of the blocking member 342 .

[0094] In this embodiment, when the first foaming component 36 and the second foaming component 37 are arranged in the sealing part 342, the sealing part 342 includes an independently formed first covering part 3425 and a second covering part 3426. The first covering part 3425 and the second covering part 3426 enclose a receiving cavity 3424. The independently formed first covering part 3425 and the second covering part 3426 facilitate placing the first foaming component 36 and the second foaming component 37 therein. Subsequently, the first covering part 3425 and the second covering part 3426 can be connected into a whole, for example, by ultrasonic welding or interference pressing for assembly.

[0095] It can be understood that this over-temperature protection method is an irreversible, one-time use method.

[0096] Therefore, the above-mentioned pressure reducing valve 100 can set the over-pressure closing implementation structure in the connector 30, which can be in a hidden manner, reducing the volume occupied by the entire pressure reducing valve 100, and at the same time, it can automatically restore to the state of opening the fluid flow channel after the internal air pressure is in a balanced state, without manual adjustment, and is convenient for users to use; at the same time, the blocking part 342 is also set to a plastic part, which can soften or even melt to block the air flow channel and achieve a protective effect at high temperature. Furthermore, by providing the first foaming agent 361 and the second foaming agent 371 in the blocking part 342, in a high temperature environment, not only can the air flow channel 331 be blocked by the melting of the blocking part 342, the first foaming agent 361 and the second foaming agent 371 can also foam and expand after mixing to fill the air flow channel 331, thereby achieving secondary blocking of the air flow channel 331 and ensuring the tightness of the blocking of the air flow channel 331.

[0097] Example 6

[0098] See also Figures 7 to 9 On the basis of embodiments 1 to 5, in order to avoid noise generated when the slide rod 25 is blocked on the end of the connector 30, a first buffer member 40 is provided at one end of the slide rod 25 facing the connector 30, for example, a rubber pad is provided, and a sound-absorbing effect is achieved through the expansion of the flexible rubber pad and the connector 30.

[0099] The first buffer member 40 may be embedded in the slide bar 25 or may be wrapped around the end of the slide bar 25 when provided, which is not limited herein.

[0100] Example 7

[0101] Further, see Figures 7 to 9On the basis of embodiments one to six, in order to avoid the noise caused by the collision at the connection between the connecting rod 24 and the sliding rod 25, the pressure reducing valve 100 further includes a second buffer 50 and / or a third buffer 60; a through hole 252 is provided at one end of the sliding rod 25 connected to the connecting rod 24, and the second end of the connecting rod 24 is passed through the through hole 252. A second buffer 50 is provided on the inner wall of the through hole 252, and / or a third buffer 60 is provided on the outer wall of the second end. Since the rotation of the connecting rod 24 needs to drive the sliding rod 25 to move linearly, there is a gap between the second end and the inner wall of the through hole 252, and the second end has a certain amount of activity space in the through hole 252. Therefore, in order to avoid the second end and one end of the sliding rod 25 from colliding and generating noise, a second buffer 50 is provided on the inner wall of the through hole 252, and / or a third buffer 60 is provided on the outer wall of the second end. The noise reduction effect is achieved through the collision between materials with flexible properties or the collision between materials with flexible properties and hard materials.

[0102] Specifically, a second buffer member 50 may be provided on the inner wall of the through hole 252, or a third buffer member 60 may be provided on the outer wall of the second end, or buffer members may be provided on both the inner wall of the through hole 252 and the outer wall of the second end. For example, the second buffer member 50 and the third buffer member 60 may both be set to rubber, so as to achieve a sound-absorbing effect.

[0103] Example 8

[0104] See also Figure 14 , which is a pressure reducing valve 100 provided in the eighth embodiment of the present invention, on the basis of embodiments one to seven, the pressure reducing valve 100 of this embodiment further includes an adjusting member 70, which is arranged in the air inlet portion 12, opposite to the slide rod 25, between the slide rod 25 and the connector 30, and threadedly connected to the air inlet portion 12, and provided with a channel connected to the air flow channel of the shell 33. In this way, when the user needs to adjust the intake flow rate, the user can insert an external tool into the adjusting member 70 and twist the adjusting member 70 to adjust the distance between the adjusting member 70 and the slide rod 25 to move away from or approach the slide rod 25, thereby achieving adjustment of the intake flow rate.

[0105] It can be understood that the end of the adjusting member 70 facing the sliding rod 25 has a smaller diameter, so that the sliding rod 25 can close the opening of the adjusting member 70.

[0106] The above-mentioned pressure reducing valve 100 can adjust the distance between it and the slide rod 25 by setting the adjustment part 70 in the air inlet part 12, thereby achieving the effect of adjusting the air intake flow rate. Users can adjust it according to their own needs to meet the customer's usage requirements.

[0107] Embodiment 9

[0108] See also Figures 3 to 6 、 Figure 10 and Figure 12 On the basis of the first to eighth embodiments, a pressure reducing valve 100 is provided in the ninth embodiment of the present invention. In order to ensure the sealing performance of the pressure reducing valve 100 when installed on the gas cylinder, the pressure reducing valve 100 further includes a handwheel structure 80. The handwheel structure 80 is rotatably installed outside the air inlet portion 12 and includes a detachable screwing handwheel 81 and a threaded handwheel 82. The threaded handwheel 82 is used to connect with the gas cylinder. In this way, by detachably fitting the screwing handwheel 81 and the threaded handwheel 82, when the connector 30 and the gas cylinder are docked, in one embodiment, a second sealing ring 38 is provided on the second connecting head 32 of the exposed connector 30 to achieve a sealed connection with the gas cylinder. The screwing handwheel 81 is put on the The threaded hand wheel 82 is arranged outside the threaded bolt, and the threaded hand wheel 82 is rotated to achieve connection with the gas cylinder, and due to the arrangement of the second sealing ring 38, a seal can be achieved; in another way, when the second sealing ring 38 is not arranged on the second connecting head 32 of the connector 30, since the connector 30 is made of metal, a poor seal will occur when it is installed on a metal gas cylinder. When installing in this way, the threaded hand wheel 82 is first installed on the gas cylinder by turning the hand wheel 31, and then the hand wheel 81 is turned out of the threaded hand wheel 82, so that the threaded hand wheel 82 exposes the hexagonal mounting portion, and the wrench 400 is clamped on the hexagonal mounting portion of the threaded hand wheel 82 to turn the threaded hand wheel 82, for example Figure 6 Thus, the interference-fitted screwing hand wheel 81 and the threaded hand wheel 82 can achieve the installation of the connector 30 of two structures.

[0109] Example 10

[0110] The present invention further provides a gas appliance in a tenth embodiment, comprising the pressure reducing valve 100 described in the above-mentioned first to ninth embodiments.

[0111] Among them, the gas valve is installed on the gas appliance and is used to deliver gas to the gas appliance. Since the air intake part 12 and the pressure regulating part 11 in the pressure reducing valve 100 are integrated, the molding cost of the entire valve body 10 can be reduced, and the assembly efficiency can be improved. The slide rod 25 can be further improved, and it also has the effect of regulating the air intake flow.

[0112] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A pressure reducing valve (100), characterized in that: include: The valve body (10) comprises a pressure regulating portion (11) and an air inlet portion (12), wherein the pressure regulating portion (11) is used to connect to the stove end, and the air inlet portion (12) and the pressure regulating portion (11) are integrally arranged; A pressure regulating structure (20) comprises a diaphragm (21), a first elastic member (22), a core shaft (23), a connecting rod (24) and a sliding rod (25); the diaphragm (21), the first elastic member (22) and the core shaft (23) are arranged in the pressure regulating portion (11); a first end of the connecting rod (24) and the core shaft (23) are rotatably arranged, a middle portion and the valve body (10) are rotatably arranged, and a second end and the sliding rod (25) are rotatably arranged; the sliding rod (25) is slidably arranged in the air inlet portion (12); A connector (30) is connected to an end of the air inlet (12) away from the pressure regulating part (11) and is used for connecting to a gas cylinder.

2. The pressure reducing valve (100) according to claim 1, characterized in that in, The connecting rod (24) has a first rotation point (241) relative to the sliding rod (25), and a first straight-line distance between the free end of the sliding rod (25) and the first rotation point (241) is L1. The connecting rod (24) has a second rotation point (242) relative to the core shaft (23), and a second straight-line distance between the first rotation point (241) and the second rotation point (242) is L2, wherein the ratio range of L1:L2 is 0.5-2.

5.

3. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The connector (30) includes a first connector (31) and a second connector (32), wherein the first connector (31) is provided with an external thread and is used to connect to the air inlet (12), and the second connector (32) is located outside the air inlet (12) and is used to connect to the gas cylinder. Wherein, one end of the first connector (31) connected to the second connector (32) is provided with a glue containing groove (311).

4. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The slide bar (25) is provided with a flow groove (251) extending along its length direction.

5. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The connector (30) comprises: A housing (33), wherein the housing (33) is provided with an air flow channel (331); An over-flow protection structure (34) is provided in the air flow channel (331). The over-flow protection structure (34) can at least reduce the flow rate of the air flow channel (331) when the flow rate at the air inlet end (332) of the connector (30) is greater than a preset flow rate, and can open the air flow channel (331) when the air pressure in the valve body (10) reaches equilibrium.

6. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The pressure reducing valve (100) further comprises a first buffer member (40), and the first buffer member (40) is provided on one end of the sliding rod (25) facing the connector (30).

7. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The pressure reducing valve (100) further includes a second buffer member (50) and / or a third buffer member (60); One end of the sliding rod (25) connected to the connecting rod (24) is provided with a through hole (252), the second end is passed through the through hole (252), the second buffer member (50) is provided on the inner wall of the through hole (252), and / or the third buffer member (60) is provided on the outer wall of the second end.

8. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The pressure reducing valve (100) further includes an adjusting member (70), which is disposed in the air inlet portion (12), between the slide rod (25) and the connector (30), and is threadedly connected to the air inlet portion (12).

9. The pressure reducing valve (100) according to claim 1 or 2, characterized in that: The pressure reducing valve (100) further comprises a handwheel structure (80), which is rotatably mounted outside the air inlet portion (12) and comprises a detachable screwing handwheel (81) and a threaded handwheel (82), wherein the screwing handwheel (81) is used to drive the threaded handwheel (82) to rotate under the driving force of an external force, and the threaded handwheel (82) is used to be connected to the gas cylinder.

10. A gas appliance, characterized in that: The invention comprises a pressure reducing valve (100) as claimed in any one of claims 1 to 9.

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