Flow-adjustable pressure reducing valve and gas appliance

Abstract

The utility model discloses a flow adjustable pressure reducing valve and gas appliance. Pressure reducing valve includes: valve body, and valve body is equipped with valve cavity, pressure regulating structure is located in valve cavity, including diaphragm, elastic part, mandril, connecting rod and slide bar, and the both ends of elastic part are respectively with the inner wall of valve cavity, diaphragm abutment, and mandril is connected diaphragm, and the first end of connecting rod and mandril rotatory setting, and the middle part and valve body rotatory setting, and the second end and slide bar rotatory setting, connector is located in the air inlet end of valve body, and with slide bar opposite setting, adjusting structure can be adjusted and is installed in valve body, and with mandril abutment, is used for driving mandril movement to drive connecting rod rotation to by the rotation of connecting rod slide of slide bar is driven, thereby realizes the size adjustment of the opening between slide bar and connector. The utility model discloses a flow adjustable pressure reducing valve, can adjust the size of the opening between slide bar and connector, thereby realizes the adjustment of the air intake, satisfies different user demand.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a pressure reducing valve with adjustable flow rate and a gas appliance. Background Technology

[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. A pressure reducing valve includes a valve body and structures such as a diaphragm, spring, spindle, connecting rod, and slide rod housed within the valve body, as well as a connector located at the air inlet of the valve body. The opening degree between the slide rod and the connector determines the air intake volume of the valve body.

[0003] In existing pressure reducing valves, the opening degree between the slide rod and the connector cannot be changed according to the user's needs after installation, thus limiting their usage. Utility Model Content

[0004] To address at least one problem existing in the prior art, according to one aspect of the present invention, a flow-adjustable pressure reducing valve is provided, comprising:

[0005] Valve body, wherein the valve body is provided with a valve cavity;

[0006] A pressure regulating structure is provided in the valve cavity, including a diaphragm, an elastic element, a spindle, a connecting rod, and a slide rod. The two ends of the elastic element abut against the inner wall of the valve cavity and the diaphragm, respectively. The spindle is connected to the diaphragm. The first end of the connecting rod is rotatably connected to the spindle, the middle part is rotatably connected to the valve body, and the second end is rotatably connected to the slide rod.

[0007] A connector is located at the air inlet end of the valve body and is positioned opposite to the slide rod;

[0008] An adjustable structure is installed on the valve body and abuts against the spindle. It drives the spindle to move, thereby rotating the connecting rod. The rotation of the connecting rod then drives the sliding rod to slide, thereby adjusting the opening between the sliding rod and the connector.

[0009] In some embodiments, the regulating structure and the valve body are threadedly connected.

[0010] In some embodiments, the valve body includes a main body and a mounting post, the main body being provided with the valve cavity;

[0011] The adjustment structure is adjustable and located on the mounting column.

[0012] In some embodiments, the mounting post and the valve body are formed separately.

[0013] In some embodiments, the valve body is provided with a through-hole;

[0014] The adjustment structure includes a first section and a second section.

[0015] The first segment passes through the through-hole, and the second segment is threadedly connected to the mounting post.

[0016] Alternatively, the first section is threaded to the side wall of the through-hole, and the second section is clearance-fitted to the mounting post.

[0017] In some embodiments, the flow-adjustable pressure reducing valve further includes a sealing ring, the outer diameter of the first section is smaller than the outer diameter of the second section, and the second section is threadedly connected to the mounting post;

[0018] The sealing ring is fitted over the first section and is clamped between the main body and the second section;

[0019] or,

[0020] The sealing ring is located at the through-hole.

[0021] In some embodiments, the flow-adjustable pressure-reducing valve further includes a protective plate that covers the opening of the mounting post.

[0022] In some embodiments, a slot is provided on the side wall of the opening of the mounting post, and the protective plate is engaged in the slot.

[0023] In some embodiments, the adjustment structure is provided with an adjustment groove that cooperates with the external drive structure.

[0024] In another aspect, this utility model provides a gas valve, including the aforementioned flow-adjustable pressure reducing valve.

[0025] In summary, the adjustable flow pressure reducing valve and gas valve provided by this utility model have the following technical effects:

[0026] By setting an adjustment structure on the valve body, when it is necessary to adjust the opening H between the slide rod and the connector, that is, to adjust the distance between the two, the adjustment structure is driven to move, so that the adjustment structure drives the spindle to move axially. The movement of the spindle drives the connecting rod to rotate relative to the valve body. The rotation of the connecting rod causes the slide rod to move closer to or away from the connector, thereby adjusting the opening between the slide rod and the connector. This meets the needs of different users for different air output volumes and avoids the need to re-manufacture valve bodies of different sizes when different air output volumes are required, thus improving the practicality of the pressure reducing valve. Attached Figure Description

[0027] Figure 1This is a cross-sectional schematic diagram of a flow-adjustable pressure reducing valve according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 Enlarged view of point I in the middle;

[0029] Figure 3 for Figure 1 An exploded view of the pressure reducing valve in the diagram;

[0030] Figure 4 for Figure 3 Enlarged schematic diagram of section II.

[0031] Attached image:

[0032] 100- Flow-adjustable pressure reducing valve, 10- Valve body, 11- Valve chamber, 111- Upper chamber, 112- Lower chamber, 12- Main body, 13- Mounting post, 131- Opening, 132- Slot, 14- Through-hole, 15- Pressure regulating part, 16- Air inlet, 20- Pressure regulating structure, 21- Diaphragm, 22- Elastic element, 23- Spindle, 24- Connecting rod, 25- Slide rod, 30- Connector, 40- Adjusting structure, 41- First stage, 42- Second stage, 43- Adjusting groove, 50- Sealing ring, 60- Protective plate. Detailed Implementation

[0033] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] Please see Figures 1 to 4The flow-adjustable pressure reducing valve 100 provided in this embodiment of the utility model includes a valve body 10, a pressure regulating structure 20, a connector 30, and an adjustment structure 40.

[0038] The valve body 10 has a valve cavity 11. A pressure regulating structure 20 is located in the valve cavity 11 and includes a diaphragm 21, an elastic element 22, a spindle 23, a connecting rod 24, and a slide rod 25. The two ends of the elastic element 22 abut against the inner wall of the valve cavity 11 and the diaphragm 21, respectively. The spindle 23 is connected to the diaphragm 21. The first end of the connecting rod 24 is rotatably connected to the spindle 23, the middle part is rotatably connected to the valve body 10, and the second end is rotatably connected to the slide rod 25. A connector 30 is located at the air inlet end of the valve body 10 and is opposite to the slide rod 25. An adjusting structure 40 is adjustablely installed on the valve body 10 and abuts against the spindle 23. It is used to drive the spindle 23 to move, thereby driving the connecting rod 24 to rotate. The rotation of the connecting rod 24 drives the slide rod 25 to slide, thereby adjusting the opening H between the slide rod 25 and the connector 30.

[0039] The aforementioned flow-adjustable pressure reducing valve 100, by setting an adjustment structure 40 on the valve body 10, allows for adjustment of the opening H between the slide rod 25 and the connector 30, i.e., adjusting the distance between them. By driving the adjustment structure 40 to move, the spindle 23 is driven to move axially. The movement of the spindle 23 causes the connecting rod 24 to rotate relative to the valve body 10. The rotation of the connecting rod 24 causes the slide rod 25 to move closer to or further away from the connector 30, thereby adjusting the opening between the slide rod 25 and the connector 30. This satisfies the different air output requirements of different users and avoids the need to re-manufacture valve bodies 10 of different sizes when different air output volumes are required, thus improving the practicality of the pressure reducing valve.

[0040] Specifically, the valve body 10 includes a pressure regulating part 15 and an air intake part 16. The pressure regulating part 15 forms the valve cavity 11 described above. A diaphragm 21 is disposed in the valve cavity 11, dividing the valve cavity 11 into an upper cavity 111 and a lower cavity 112. An elastic member 22 abuts against the cavity wall of the upper cavity 111 and the diaphragm 21. A connector 30 is connected to the air intake port of the air intake part 15.

[0041] When the pressure reducing valve is in use, high-pressure gas enters the lower chamber 112 from the inlet 16. The airflow pushes the diaphragm 21 upward and compresses the elastic element 22, while simultaneously driving the connecting rod 24 to rotate. As the airflow enters the lower chamber 112, the gas pressure inside the lower chamber 112 gradually increases, compressing the elastic element 22. The slide rod 25 moves in the inlet 16, closing the opening of the connector 30. As gas is continuously discharged from the outlet, when the gas pressure in the lower chamber 112 decreases, under the elastic force of the elastic element 22, and when the elastic force is greater than the thrust generated by the gas pressure inside the lower chamber 112, the diaphragm 21 is pushed downward, causing the slide rod 25 to open the opening of the connector 30. This process repeats, stabilizing the gas pressure flowing out of the outlet within the set range, thereby achieving the effect of stabilizing and reducing pressure.

[0042] Understandably, in this embodiment, the adjustment structure 40 moves by driving the spindle 23, which is equivalent to adjusting the range of motion of the slide bar 25, thereby achieving the effect of adjusting the opening size between the connector 30 and the connector.

[0043] The connector 30 is used to connect to the gas cylinder, thereby enabling gas input. Understandably, the pressure reducing valve also includes a connecting handwheel to ensure stable connection of the connector 30 to the gas cylinder.

[0044] In this case, when setting the adjustment structure 40, the adjustment structure 40 and the valve body 10 can be in clearance fit, for example, the clearance is 0. In this case, under the drive of external force, the adjustment structure 40 can be driven to move relative to the valve body 10. Alternatively, the adjustment structure 40 and the valve body 10 can be threadedly connected, and the rotation of the adjustment structure 40 can realize the movement of the adjustment structure 40 relative to the valve body 10.

[0045] Understandably, the adjustment structure 40 is used to adjust the spindle 23. Therefore, the adjustment structure 40 is inserted through the valve body 10. The valve body 10 is provided with an insertion port 14 for the adjustment structure 40 to pass through, and the insertion port 14 is connected to the valve cavity 11.

[0046] Specifically, please refer to Figure 2 In this embodiment, the adjustment structure 40 and the valve body 10 are threadedly connected, which facilitates the movement of the adjustment structure 40; at the same time, the threaded connection reduces the possibility of gas leakage.

[0047] Please see Figures 1 to 4In some embodiments of this utility model, the valve body 10 includes a main body 12 and a mounting post 13. The main body 12 is provided with a valve cavity 11. The adjusting structure 40 is adjustablely disposed in the mounting post 13. In this way, by setting the mounting post 13, the adjusting structure 40 can be hidden and protected, and the consistency of the appearance of the entire valve body 10 can be ensured. At the same time, the tightness of the valve body 10 can be improved by the cooperation between the mounting post 13 and the adjusting structure 40.

[0048] In some implementations, the mounting post 13 and the valve body 10 can be formed separately. The two can then be stably connected through welding, bonding, or other methods, ensuring a tight seal. Furthermore, forming them separately results in smaller, easier-to-form components, reducing the complexity of the molding process. In other embodiments, the mounting post 13 and the valve body 10 can be formed as a single piece, avoiding subsequent connection steps and improving the overall forming efficiency of the valve body 10.

[0049] In some embodiments, when the adjusting structure 40 is threadedly connected to the valve body 10, the valve body 10 passes through the opening 14. The adjusting structure 40 includes a first section 41 and a second section 42. The first section 41 passes through the opening 14, and the second section 42 is threadedly connected to the mounting post 13. Alternatively, the first section 41 is threadedly connected to the side wall of the opening 14, and the second section 42 is clearance-fitted to the mounting post 13. Thus, by threading the first section 41 to the valve body 10 or by threading the second section 42 to the mounting post 13, the movement of the drive spindle 23 can be achieved under the drive of an external force.

[0050] Furthermore, to ensure the sealing performance of the valve body 10, the flow-adjustable pressure reducing valve 100 also includes a sealing ring 50. The outer diameter of the first section 41 is smaller than the outer diameter of the second section 42, and the second section 42 is threadedly connected to the mounting post 13. The sealing ring 50 is sleeved on the outside of the first section 41 and is clamped between the main body 12 and the second section 42. Alternatively, the sealing ring 50 is located at the through-hole 14, and the first end 41 passes through the central hole of the sealing ring 50. Thus, by setting the sealing ring 50, the through-hole 14 of the main body 12 can be sealed, reducing the probability of gas leakage and ensuring the sealing performance of the valve body 10.

[0051] Understandably, when setting the sealing ring 50, the second section 42 and the mounting post 13 are threaded together, and the surface of the first section 41 is a relatively smooth surface. Therefore, when rotating the adjustment structure 40, the adjustment structure 40 and the sealing ring 50 can move relative to each other more easily, which facilitates adjustment.

[0052] Specifically, in this embodiment, when setting the sealing ring 50, the sealing ring 50 is set outside the main body 12, and is thus clamped between the main body 12 and the second segment 42. By setting the sealing ring 50 outside the valve body 10, it is convenient to install the valve body 10, the sealing ring 50 and the adjustment structure 40. Since the wall thickness of the valve body 10 is relatively thin, compared with the method of installing the sealing ring 50 at the through-hole 14, the installation difficulty of the sealing ring 50 can be reduced, and a sealing ring 50 with a larger radial dimension can be set to achieve a better sealing effect.

[0053] Please see Figures 2 to 4 In one embodiment of this utility model, when the mounting column 13 is provided, in order to protect the adjustment structure 40 and prevent moisture from entering the mounting column 13 and corroding the adjustment structure 40, the flow-adjustable pressure reducing valve 100 also includes a protective plate 60. The protective plate 60 is covered on the opening 131 of the mounting column 13. Thus, by providing the protective plate 60, the adjustment structure 40 can be hidden outside the mounting column 13, thereby protecting the adjustment structure 40 and further ensuring the uniformity of the appearance of the entire valve body 10.

[0054] In some embodiments, when installing the protective plate 60, in order to facilitate the positioning and installation of the protective plate 60, a slot 132 is provided on the side wall of the opening 131 of the mounting post 13. The protective plate 60 is snapped into the slot 132. By setting the slot 132, the installation of the protective plate 60 can be positioned, ensuring the accuracy of the installation of the protective plate 60. At the same time, by setting the slot 132, after the protective plate 60 is installed, the surface of the protective plate 60 can be flush with the end face of the mounting post 13, ensuring the uniformity of the appearance of the entire valve body 10.

[0055] Specifically, in this embodiment, the slot 132 extends circumferentially along the mounting post 13 to facilitate the opening of the slot 132; in other embodiments, the central angle of the extension direction of the slot 132 may be part of the circumference of the mounting post 13, and the protective plate 60 is provided with a positioning protrusion, which is inserted into the slot, thus achieving the effect of positioning and installation.

[0056] When installing the protective plate 60 into the slot 132, after adjusting the slide rod 25, it can be done by bonding, which not only ensures the tightness of the installation, but also ensures the sealing after installation.

[0057] In other embodiments, the protective sheet 60 can be adhesively attached to the end face of the mounting post 13, eliminating the need to slot the mounting post 13 and reducing the installation difficulty of the entire valve body 10.

[0058] Please see Figure 2 and Figure 4In one embodiment of the present invention, in order to facilitate the adjustment of the adjustment structure 40, the adjustment structure 40 is provided with an adjustment groove 43 that cooperates with the external drive structure, such as a hexagonal adjustment groove 43, so that a wrench can be inserted into the adjustment groove 43 to rotate the adjustment structure 40.

[0059] Understandably, the second section 42 is provided with an adjustment groove 43, and after the adjustment structure 40 is turned in the dark, the second section 42 is hidden inside the mounting column 13 to avoid interfering with the installation of the protective plate 60.

[0060] The adjustment method for the above gas valve is as follows:

[0061] When a small flow rate is required, remove the protective plate 60 and use a wrench to adjust the adjusting structure 40 into the valve cavity 11. The adjusting structure 40 will push the spindle 23 upward, and the spindle 23 will drive the connecting rod 24 to rotate clockwise around the pin and push the slide rod 25 to move towards the connector 30, reducing the distance between them and thus reducing the valve opening H, achieving a small flow rate of air output. When a large flow rate is required, remove the protective plate 60 and then screw the adjusting structure 40 outward from the valve body 10. At this time, the spindle 23 will drive the connecting rod 24 to descend, and the connecting rod 24 will rotate counterclockwise around the pin and pull the slide rod 25 assembly to the left, thus increasing the valve opening H, achieving a large flow rate of air output.

[0062] In another embodiment, the present invention also provides a gas appliance, including the gas valve described above.

[0063] The gas appliance described above, due to the adjustment structure 40 on the valve body 10, can adjust the opening degree H between the slide rod 25 and the connector 30 to meet the needs of different users for different gas output, so that the gas can achieve different flame sizes. This avoids the situation where valve bodies 10 of different sizes need to be remade when different gas output is required, thus improving the practicality of the pressure reducing valve.

[0064] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A flow-adjustable pressure reducing valve (100), characterized in that, include: Valve body (10), wherein the valve body (10) is provided with valve cavity (11); A pressure regulating structure (20) is provided in the valve cavity (11) and includes a diaphragm (21), an elastic element (22), a spindle (23), a connecting rod (24), and a slide rod (25). The two ends of the elastic element (22) abut against the inner wall of the valve cavity (11) and the diaphragm (21), respectively. The spindle (23) is connected to the diaphragm (21). The first end of the connecting rod (24) is rotatably connected to the spindle (23), the middle part is rotatably connected to the valve body (10), and the second end is rotatably connected to the slide rod (25). A connector (30) is provided at the air inlet end of the valve body (10) and is disposed opposite to the slide rod (25); An adjustment structure (40) is adjustablely installed on the valve body (10) and abuts against the spindle (23). It is used to drive the spindle (23) to move, thereby driving the connecting rod (24) to rotate. The rotation of the connecting rod (24) drives the slide rod (25) to slide, thereby realizing the adjustment of the opening size between the slide rod (25) and the connector (30).

2. The flow-adjustable pressure reducing valve (100) according to claim 1, characterized in that, The regulating structure (40) and the valve body (10) are threaded together.

3. The flow-adjustable pressure reducing valve (100) according to claim 1 or 2, characterized in that, The valve body (10) includes a main body (12) and a mounting post (13), and the main body (12) is provided with the valve cavity (11); The adjustment structure (40) is adjustablely located on the mounting column (13).

4. The flow-adjustable pressure reducing valve (100) according to claim 3, characterized in that, The mounting post (13) and the valve body (10) are formed separately.

5. The flow-adjustable pressure reducing valve (100) according to claim 3, characterized in that, The valve body (10) is provided with a through-hole (14); The adjustment structure (40) includes a first section (41) and a second section (42). The first segment (41) passes through the through-hole (14), and the second segment (42) is threadedly connected to the mounting post (13). Alternatively, the first segment (41) and the side wall of the through-hole (14) are threaded together, and the second segment (42) and the mounting post (13) are clearance-fitted.

6. The flow-adjustable pressure reducing valve (100) according to claim 5, characterized in that, The flow-adjustable pressure reducing valve (100) also includes a sealing ring (50), the outer diameter of the first section (41) is smaller than the outer diameter of the second section (42), and the second section (42) is threadedly connected to the mounting post (13); The sealing ring (50) is sleeved on the outside of the first segment (41) and is clamped between the main body (12) and the second segment (42); or, The sealing ring (50) is located at the through-hole (14).

7. The flow-adjustable pressure reducing valve (100) according to claim 3, characterized in that, The flow-adjustable pressure reducing valve (100) also includes a protective plate (60) that covers the opening (131) of the mounting post (13).

8. The flow-adjustable pressure reducing valve (100) according to claim 7, characterized in that, The mounting post (13) has a slot (132) on the side wall of the opening (131) of the mounting post (13), and the protective plate (60) is engaged in the slot (132).

9. The flow-adjustable pressure reducing valve (100) according to claim 1 or 2, characterized in that, The adjustment structure (40) is provided with an adjustment groove (43) that cooperates with the external drive structure.

10. A gas valve, characterized in that, Includes a flow-adjustable pressure reducing valve (100) as described in any one of claims 1-9.

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