Pressure regulating valve
By designing a pressure regulating valve containing multiple pressure regulating components and flow control components, the problem of unstable pressure regulating and difficulty in automatic closing in existing two-stage pressure regulators is solved, and the stable pressure regulating and safety improvement of gas flow is achieved.
Patent Information
- Application Number
- CN202422412852.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing two-stage voltage regulators have problems such as fast internal flow rate, unstable voltage regulation, complex outlet structure, and uneven flow rate and inability to automatically close the outlet.
A pressure regulating valve is designed, including a first pressure regulating assembly, a lever assembly, a second pressure regulating assembly and a flow control assembly. Through the synergy of these components, the first and second pressure regulating of the intake air is achieved, and the gas flow is automatically cut off when the gas flow is too high.
It realizes stable pressure regulation of gas flow, improves the safety and use efficiency of the pressure regulator valve, and avoids the problems of uneven outlet flow and complex structure.
Smart Images
Figure CN223049504U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of flow control devices, and in particular, to a pressure regulating valve. Background Art
[0002] A gas pressure regulator belongs to a pressure reducing valve, which is a device that keeps the outlet gas at a specified pressure by automatically changing the gas flow rate through a regulating valve. Currently, the commonly used gas pressure regulators are divided into two types: direct-acting pressure regulators and indirect-acting pressure regulators. The direct-acting pressure regulators are further divided into single-stage pressure regulators and two-stage pressure regulators. However, the existing two-stage pressure regulators usually have problems such as fast internal flow velocity and unstable pressure regulation. In addition, the structure at the outlet is complex, which easily leads to uneven outlet flow rate, and it is also unable to automatically close the outlet when the gas flow rate is too large. Summary of the Utility Model
[0003] The present disclosure provides a pressure regulating valve to at least solve the above technical problems existing in the prior art.
[0004] The pressure regulating valve according to the present disclosure includes: an upper housing; a lower housing connected to the upper housing, and an air inlet chamber and an air outlet chamber are provided on the lower housing; a first pressure regulating assembly disposed at the upper part of the lower housing, a first pressure regulating chamber communicating with the air inlet chamber is formed between the first pressure regulating assembly and the lower housing, and one end of the first pressure regulating assembly communicates with the air inlet chamber through a through hole provided on the lower housing; a lever assembly movably disposed at the outlet of the first pressure regulating chamber and capable of opening and closing the outlet; a second pressure regulating assembly disposed between the upper housing and the lower housing and above the first pressure regulating assembly, one end of the lever assembly away from the outlet is connected to the second pressure regulating assembly, a second pressure regulating chamber is formed between the second pressure regulating assembly and the first pressure regulating assembly, and the second pressure regulating chamber communicates with the air outlet chamber; and a flow control assembly disposed at the air outlet inlet of the air outlet chamber, and the flow control assembly is configured to block the air outlet inlet when the gas flow rate reaches a set amount.
[0005] In an implementable embodiment, the first pressure regulating assembly includes a push rod, a small diaphragm, a high-pressure cap, and a tower spring. The high-pressure cap is connected to the lower housing. One end of the push rod is slidably inserted into the air inlet chamber through the through hole, and the other end of the push rod is slidably fitted on the high-pressure cap. The middle position of the small diaphragm is sleeved on the outer periphery of the push rod, and the outer edge of the small diaphragm is connected to the lower housing. One end of the tower spring abuts against the lower surface of the high-pressure cap, and the other end abuts against the upper surface of the small diaphragm.
[0006] In an implementable embodiment, the second pressure regulating component includes a pull rod, a large diaphragm, and a large diaphragm spring. The outer edge of the large diaphragm is connected between the upper housing and the lower housing. One end of the pull rod is fixed to the large diaphragm, and the other end is fixedly connected to the lever assembly. One end of the large diaphragm spring abuts against the upper housing, and the other end abuts against the large diaphragm.
[0007] In an implementable embodiment, the lever assembly includes a rotating shaft disposed on the lower housing and a swing arm sleeved on the rotating shaft. One end of the swing arm is movably connected to the second pressure regulating component, and a sealing member that can abut against the outlet is provided at the other end of the swing arm.
[0008] In an implementable embodiment, the flow control component includes a limiting cavity and a first steel ball limited in the limiting cavity. The limiting cavity is fixedly connected to the inner wall of the lower housing and communicates with the air outlet cavity. A connection hole is provided on the limiting cavity, and the second pressure regulating cavity communicates with the air outlet cavity through the connection hole.
[0009] In an implementable embodiment, the first steel ball has an initial position and a blocking position in the limiting cavity. When the first steel ball is in the initial position, the first steel ball blocks the connection hole. When the air flow rate reaches a set amount, the first steel ball is blown from the initial position to the blocking position, and the first steel ball blocks the air outlet inlet.
[0010] In an implementable embodiment, a switch component is movably disposed on the lower housing and partially extends into the first pressure regulating cavity. The switch component is used to drive the ejector rod to move in a direction close to or away from the air inlet cavity to connect or disconnect the gas cylinder.
[0011] In an implementable embodiment, the switch component includes a rotating portion rotatably disposed on the lower housing and extending into the first pressure regulating cavity. An eccentric portion capable of abutting against the ejector rod to drive the ejector rod to move in a direction close to or away from the air inlet cavity is provided on the rotating portion.
[0012] In an implementable embodiment, the switch component further includes a handle connected to the rotating portion and extending out from the side surface of the lower housing.
[0013] In an implementable embodiment, an air inlet hole is provided at a position on the lower housing between the air inlet cavity and the first pressure regulating cavity, and a filter element is provided in the air inlet hole.
[0014] In the present disclosure, since the pressure regulating valve includes a first pressure regulating component and a second pressure regulating component to achieve the first-stage and second-stage pressure regulation of the intake air, a lever component is arranged at the outlet of the first pressure regulating chamber. When the gas enters the second pressure regulating chamber from the first pressure regulating chamber, the gas lifts the lever component, opening the outlet of the first pressure regulating chamber. At the same time, the lever component drives the second pressure regulating component to move downward, thereby cooperating with the first pressure regulating component to control the exhaust gas volume. After passing through the first pressure regulating chamber and the second pressure regulating chamber, the gas becomes stable and is output from the air outlet chamber. Since a flow control component is arranged at the air inlet of the air outlet chamber, when the gas flow rate in the second pressure regulating chamber is too large, the flow control component will use its fluidity to block the air inlet, achieving the effect of automatically cutting off the air flow and improving the safety of the pressure regulating valve.
[0015] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] By referring to the drawings and reading the detailed description below, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become easily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, where:
[0017] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0018] Figure 1 Shows a schematic diagram of the overall structure of a pressure regulating valve according to an exemplary embodiment of the present disclosure;
[0019] Figure 2 Shows a cross-sectional view of a pressure regulating valve according to an exemplary embodiment of the present disclosure (the pressure regulating valve is open);
[0020] Figure 3 Shows a cross-sectional view of a pressure regulating valve according to an exemplary embodiment of the present disclosure (the pressure regulating valve is closed);
[0021] Figure 4 Shows Figure 3 A partial view in the direction A of
[0022] Figure 5 Shows Figure 4 A view in the direction B-B of
[0023] Figure 6 Shows Figure 4 A view in the direction B-B of
[0024] Description of reference numerals in the figures: 1. Upper housing; 2. Lower housing; 3. First pressure regulating assembly; 4. Lever assembly; 5. Second pressure regulating assembly; 6. Flow control assembly; 7. Switch assembly; 8. Filter element; 9. Quick-connect fitting; 21. Intake cavity; 22. Outlet cavity; 23. First pressure regulating cavity; 24. Second pressure regulating cavity; 25. Annular cavity; 26. Limit hole; 31. Thumb rod; 32. Small diaphragm; 33. High-pressure cap; 34. Tower spring; 35. First gasket; 41. Rotating shaft; 42. Swing arm; 43. Seal; 51. Pull rod; 52. Large diaphragm; 53. Large diaphragm spring; 54. Second gasket; 61. Limit cavity; 62. First steel ball; 71. Rotating part; 72. Eccentric part; 73. Handle; 91. Pressing chuck; 92. Chuck spring; 93. Second steel ball; 94. Annular groove; 95. First stepped ring; 96. Second stepped ring; 221. Outlet inlet; 231. Outlet; 611. Connecting hole. Detailed implementation manners
[0025] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present disclosure.
[0026] The embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.
[0027] Referring to Figures 1 to 4 As shown, a pressure regulating valve according to an exemplary embodiment of the present disclosure includes an upper housing 1, a lower housing 2, a first pressure regulating assembly 3, a lever assembly 4, a second pressure regulating assembly 5, and a flow control assembly 6. The lower housing 2 is connected to the upper housing 1, and an intake cavity 21 and an outlet cavity 22 are provided on the lower housing 2. The first pressure regulating assembly 3 is disposed on the upper part of the lower housing 2, and a first pressure regulating cavity 23 communicating with the intake cavity 21 is formed between the first pressure regulating assembly 3 and the lower housing 2. One end of the first pressure regulating assembly 3 communicates with the intake cavity 21 through a through hole provided on the lower housing 2. The lever assembly 4 is movably disposed at the outlet 231 of the first pressure regulating cavity 23 and can open and close the outlet 231. The second pressure regulating assembly 5 is disposed between the upper housing 1 and the lower housing 2 and above the first pressure regulating assembly 3. One end of the lever assembly 4 away from the outlet 231 is connected to the second pressure regulating assembly 5. A second pressure regulating cavity 24 is formed between the second pressure regulating assembly 5 and the first pressure regulating assembly 3, and the second pressure regulating cavity 24 communicates with the outlet cavity 22. The flow control assembly 6 is disposed at the outlet inlet 221 of the outlet cavity 22, and the flow control assembly 6 is configured to block the outlet inlet 221 when the gas flow rate reaches a set amount.
[0028] In this embodiment, since the pressure regulating valve includes a first pressure regulating component 3 and a second pressure regulating component 5 to achieve the first-stage and second-stage pressure regulation of the intake air, a lever component 4 is provided at the outlet 231 of the first pressure regulating chamber 23. When the gas enters the second pressure regulating chamber 24 from the first pressure regulating chamber 23, the gas lifts the lever component 4, opening the outlet 231 of the first pressure regulating chamber 23. At the same time, the lever component 4 drives the second pressure regulating component 5 to move downward, and the second pressure regulating component 5 also acts on the lever component 4 to control the rotation angle of the lever component 4, thereby controlling the opening degree of the outlet 231 of the first pressure regulating chamber 23. The gas pressure in the second pressure regulating chamber 24 and the restoring force of the first pressure regulating component 3 jointly act on one end of the lever component 4 located at the second pressure regulating component 5 to control the exhaust volume. Thus, the gas is stabilized after passing through the first pressure regulating chamber 23 and the second pressure regulating chamber 24 and is output from the air outlet chamber 22. Since a flow control component 6 is provided at the air inlet 221 of the air outlet chamber 22, when the gas flow rate in the second pressure regulating chamber 24 reaches the set amount, that is, when the gas flow rate is too large, the flow control component 6 will block the air inlet 221 by virtue of its fluidity, achieving the effect of automatically cutting off the air flow and improving the safety of the pressure regulating valve. It can be understood that in actual application, the set amount can be set to 110% - 130% of the rated flow rate, or set adaptively according to actual needs.
[0029] In an implementable embodiment, the first pressure regulating component 3 includes a push rod 31, a small diaphragm 32, a high-pressure cap 33, and a conical spring 34. The high-pressure cap 33 is connected to the lower housing 2. One end of the push rod 31 is slidably inserted into the intake chamber 21 through a through hole, and the other end of the push rod 31 is slidably fitted on the high-pressure cap 33. The middle position of the small diaphragm 32 is sleeved on the outer periphery of the push rod 31, and the outer edge of the small diaphragm 32 is connected to the lower housing 2. One end of the conical spring 34 abuts against the lower surface of the high-pressure cap 33, and the other end abuts against the upper surface of the small diaphragm 32.
[0030] In this embodiment, the high-voltage cap 33 is connected to the lower housing 2 by a method of press riveting and closing. First, a limiting flange is processed at the port position of the lower housing 2 where the high-voltage cap 33 is installed. After the high-voltage cap 33 is press-fitted into the lower housing 2, the press-riveting limiting flange is used to press the edge of the high-voltage cap 33 against the lower housing 2. The lower end of the ejector rod 31 is slidably inserted into the air inlet cavity 21 through a through hole. There is a gap between the outer periphery of the ejector rod 31 and the through hole, through which gas can enter. The upper end of the ejector rod 31 is slidably fitted on the high-voltage cap 33. The middle position of the small diaphragm 32 is sleeved on the outer periphery of the ejector rod 31. The outer edge of the small diaphragm 32 and the outer edge of the high-voltage cap 33 are connected to the lower housing 2 by riveting. And the outer edge of the high-voltage cap 33 abuts above the outer edge of the small diaphragm 32. A first pressure regulating cavity 23 is formed between the lower surface of the small diaphragm 32 and the lower housing 2. The upper end of the tower spring 34 abuts against the lower surface of the high-voltage cap 33, and the lower end of the tower spring 34 abuts against the upper surface of the small diaphragm 32. In order to make the adjustment of the tower spring 34 more stable and reliable, a first gasket 35 is provided on the upper surface of the small diaphragm 32, and the first gasket 35 is clamped on the ejector rod 31.
[0031] In an implementable embodiment, the second pressure regulating assembly 5 includes a pull rod 51, a large diaphragm 52, and a large diaphragm spring 53. The edge of the large diaphragm spring 53 is connected between the upper housing 1 and the lower housing 2. One end of the pull rod 51 is fixed to the large diaphragm 52, and the other end is fixedly connected to the lever assembly 4. One end of the large diaphragm spring 53 abuts against the upper housing 1, and the other end abuts against the large diaphragm 52.
[0032] In this embodiment, the pull rod 51 is fixed to the large diaphragm 52 by a fastener. The outer edge of the large diaphragm 52 is pressed between the connection ports of the upper housing 1 and the lower housing 2. The upper end of the large diaphragm spring 53 abuts against the upper housing 1, and the lower end abuts against the large diaphragm 52. A second pressure regulating cavity 24 is formed among the lower surface of the large diaphragm 52, the lower housing 2, and the first pressure regulating assembly 3. The second pressure regulating cavity 24 communicates with the air outlet cavity 22. In order to make the large diaphragm spring 53 more stable, a second gasket 54 is further provided above the large diaphragm 52, and the lower end of the large diaphragm spring 53 abuts against the upper surface of the second gasket 54.
[0033] In an implementable embodiment, the lever assembly 4 includes a rotating shaft 41 disposed on the housing and a swing arm 42 sleeved on the rotating shaft 41. One end of the swing arm 42 is movably connected to the second pressure regulating assembly 5, and a seal 43 that can abut against the outlet 231 is provided at the other end of the swing arm 42.
[0034] In this embodiment, the rotating shaft 41 may specifically be a lever pin. When gas is discharged from the outlet 231 of the first pressure regulating chamber 23 to the second pressure regulating chamber 24, the seal 43 on the swing arm 42 is lifted by the gas to open the outlet 231 of the first pressure regulating chamber 23. At the same time, the swing arm 42 drives the pull rod 51 on the large diaphragm 52 to move downward around the rotating shaft 41, and the second pressure regulating assembly 5 also acts on the swing arm 42, thereby controlling the rotation angle of the swing arm 42, so as to control the opening degree of the outlet 231 of the first pressure regulating chamber 23. The gas pressure in the second pressure regulating chamber 24 and the restoring force of the first pressure regulating assembly 3 jointly act on one end of the swing arm 42 where the pull rod 51 is located to control the exhaust gas volume. Thus, the gas is stabilized after passing through the first pressure regulating chamber 23 and the second pressure regulating chamber 24 and is output from the air outlet chamber 22.
[0035] Referring to Figure 5 and Figure 6 As shown, in an implementable embodiment, the flow control assembly 6 includes a limiting cavity 61 and a first steel ball 62 limited in the limiting cavity 61. The limiting cavity 61 is fixedly connected to the inner wall of the lower housing 2 and communicates with the air outlet chamber 22. A connecting hole 611 is formed on the limiting cavity 61, and the second pressure regulating chamber 24 communicates with the air outlet chamber 22 through the connecting hole 611.
[0036] Specifically, in an implementable embodiment, the first steel ball 62 has an initial position and a blocking position in the limiting cavity 61. When the first steel ball 62 is in the initial position, the first steel ball 62 blocks the connecting hole 611; when the gas flow rate reaches the set amount, the first steel ball 62 is blown from the initial position to the blocking position, and the first steel ball 62 blocks the air outlet inlet 221.
[0037] In this embodiment, the size of the connecting hole 611 is smaller than the diameter of the first steel ball 62, so as to prevent the first steel ball 62 from slipping out from the connecting hole 611. When there is no gas flow or the gas flow rate is not sufficient to push the first steel ball 62 to move, the first steel ball 62 blocks the connecting hole 611. As the gas flow rate increases, the first steel ball 62 is pushed, and the connecting hole 611 is gradually opened. The gas enters the limiting cavity 61 through the connecting hole 611 and finally enters the air outlet chamber 22 through the air outlet inlet 221. When the gas flow rate is too large, that is, when it reaches the set amount, the first steel ball 62 is pushed by the gas along the limiting cavity 61 to the air outlet inlet 221 and blocks the air outlet inlet 221, achieving the effect of automatically cutting off the air flow and improving the safety of the pressure regulating valve.
[0038] Referring to Figure 2 and Figure 3 As shown, in an implementable embodiment, a switch assembly 7 is movably arranged on the lower housing 2 and partially extends into the first pressure regulating chamber 23. The switch assembly 7 is used to drive the ejector rod 31 to move in a direction close to or away from the air inlet chamber 21 to connect or disconnect the gas cylinder.
[0039] Specifically, in one implementable embodiment, the switch assembly 7 includes a rotating part 71 rotatably arranged on the lower housing 2 and extending into the first pressure regulating chamber 23. An eccentric part 72 is provided on the rotating part 71 and can abut against the ejector rod 31 to drive the ejector rod 31 to move in a direction close to or away from the air inlet chamber 21.
[0040] Further, in one implementable embodiment, the switch assembly 7 further includes a handle 73 connected to the rotating part 71 and extending out from the side of the lower housing 2.
[0041] In this embodiment, during use, the gas cylinder is connected to the air inlet chamber 21. When the user rotates the handle 73 to open the switch assembly 7, the eccentric part 72 rotates towards the direction close to the air inlet chamber 21. At this time, the ejector rod 31 extends into the air inlet chamber 21 and is conducted with the gas cylinder. When the user rotates the handle 73 to close the switch assembly 7, the eccentric part 72 rotates towards the direction away from the air inlet chamber 21, pushing the ejector rod 31 upwards. At this time, the ejector rod 31 is withdrawn from the gas cylinder, disconnecting the connection with the gas cylinder. Thus, timely air flow cut-off can be achieved, ensuring safety during use through personnel operation.
[0042] In one implementable embodiment, it further includes a quick-connect joint 9. The quick-connect joint 9 includes a pressing chuck 91, a chuck spring 92, and a second steel ball 93. An annular chamber 25 with an opening downward is provided on the lower housing 2. The upper part of the pressing chuck 91 is slidably fitted in the annular chamber 25. An annular groove 94 with an opening upward is formed between the pressing chuck 91 and the outer wall of the lower housing 2. The upper end of the chuck spring 92 abuts against the upper bottom surface of the annular chamber 25, and the lower end abuts against the lower bottom surface of the annular groove 94. A limiting hole 26 is provided on the lower housing 2.
[0043] In this embodiment, a stop edge and stop opening are further added on the side of the limiting hole 26 close to the air inlet chamber 21. The pressing chuck 91 is provided with a first stepped ring 95 and a second stepped ring 96, and the outer diameter of the second stepped ring 96 is larger than the outer diameter of the first stepped ring 95. One end of the second steel ball 93 is abutted and limited within the first stepped ring 95, and the other end is exposed in the air inlet chamber 21 through the limiting hole 26. The second steel ball 93 exposed in the air inlet chamber 21 is used to clamp the joint of the gas cylinder, so that the air inlet joint of the gas cylinder is limited within the air inlet chamber 21. When the pressing chuck 91 moves upwards, the first stepped ring 95 slowly moves upwards. When it reaches a certain distance, the first stepped ring 95 separates from the second steel ball 93. At this time, the second steel ball 93 moves outwards to the position of the second stepped ring 96. At this time, the part of the second steel ball 93 exposed in the air inlet chamber 21 decreases, releasing the clamping effect on the gas cylinder joint, realizing the separation of the air inlet chamber 21 of the pressure regulating valve and the gas cylinder joint, which is simple, fast, and safe.
[0044] In one implementable embodiment, an air inlet hole is opened at the position on the lower housing 2 between the air inlet chamber 21 and the first pressure regulating chamber 23, and a filter element 8 is arranged in the air inlet hole.
[0045] In this embodiment, the flow space of the first pressure regulating chamber 23 is increased, and an air inlet hole is formed in the lower housing 2 located at the top of the air inlet chamber 21, which also increases the gas flow rate entering the first pressure regulating chamber 23. Thus, the flow velocity at the outlet 231 of the first pressure regulating chamber 23 is reduced, thereby improving the stability of the air flow. The filter element 8 may specifically be a filter net. By providing a filter net at the air inlet hole on the upper wall of the air inlet chamber 21, impurities entering the first pressure regulating chamber 23 can be effectively filtered out, damage to the pressure regulating valve can be reduced, and the service life can be prolonged.
[0046] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the orientation words is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present disclosure; the orientation words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.
[0047] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationship between one or more components or features shown in the drawings and other components or features. It should be understood that the spatial relative terms not only include the orientation described in the drawings for the components, but also include different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the component "above other components or features" or "above other components or features" will include the situation where the component is "below other components or structures" or "below other components or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this document intends to cover all these situations.
[0048] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used here, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies and / or combinations thereof.
[0049] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present disclosure are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein.
[0050] The present disclosure has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present disclosure within the scope of the described embodiments. In addition, those skilled in the art can understand that the present disclosure is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present disclosure, and these variations and modifications all fall within the scope of protection required by the present disclosure. The scope of protection of the present disclosure is defined by the appended claims and their equivalent scope.
Claims
1. A pressure regulating valve, characterized in that: include: Upper housing (1); A lower shell (2) connected to the upper shell (1), wherein the lower shell (2) is provided with an air inlet cavity (21) and an air outlet cavity (22); a first pressure regulating assembly (3) disposed at the upper portion of the lower shell (2); a first pressure regulating chamber (23) in communication with the air inlet chamber (21) being formed between the first pressure regulating assembly (3) and the lower shell (2); one end of the first pressure regulating assembly (3) in communication with the air inlet chamber (21) via a through hole disposed on the lower shell (2); A lever assembly (4) movably disposed at the outlet (231) of the first pressure regulating chamber (23) and capable of opening and closing the outlet (231); a second pressure regulating assembly (5) disposed between the upper shell (1) and the lower shell (2) and located above the first pressure regulating assembly (3); an end of the lever assembly (4) away from the outlet (231) is connected to the second pressure regulating assembly (5); a second pressure regulating chamber (24) is formed between the second pressure regulating assembly (5) and the first pressure regulating assembly (3); the second pressure regulating chamber (24) is in communication with the air outlet chamber (22); and A flow control component (6) is arranged at the gas outlet inlet (221) of the gas outlet cavity (22), and the flow control component (6) is configured to block the gas outlet inlet (221) when the gas flow reaches a set amount.
2. The pressure regulating valve according to claim 1, characterized in that: The first voltage regulating assembly (3) comprises a push rod (31), a small diaphragm (32), a high-voltage cap (33) and a tower spring (34); the high-voltage cap (33) is connected to the lower shell (2); one end of the push rod (31) is slidably inserted into the air inlet cavity (21) through the through hole; the other end of the push rod (31) is slidably fitted on the high-voltage cap (33); the middle position of the small diaphragm (32) is sleeved on the outer periphery of the push rod (31); the outer edge of the small diaphragm (32) is connected to the lower shell (2); one end of the tower spring (34) is pressed against the lower surface of the high-voltage cap (33); and the other end is pressed against the upper surface of the small diaphragm (32).
3. The pressure regulating valve according to claim 1, characterized in that: The second pressure regulating assembly (5) comprises a pull rod (51), a large diaphragm (52) and a large diaphragm spring (53); the outer edge of the large diaphragm (52) is connected between the upper shell (1) and the lower shell (2); one end of the pull rod (51) is fixed to the large diaphragm (52), and the other end is fixedly connected to the lever assembly (4); one end of the large diaphragm spring (53) rests on the upper shell (1), and the other end rests on the large diaphragm (52).
4. The pressure regulating valve according to claim 1, characterized in that: The lever assembly (4) comprises a rotating shaft (41) arranged on the lower housing (2) and a swing arm (42) sleeved on the rotating shaft (41); one end of the swing arm (42) is movably connected to the second pressure regulating assembly (5); and the other end of the swing arm (42) is provided with a sealing member (43) that can abut against the outlet (231).
5. The pressure regulating valve according to claim 1, characterized in that: The flow control assembly (6) comprises a limiting cavity (61) and a first steel ball (62) limited in the limiting cavity (61); the limiting cavity (61) is fixedly connected to the inner wall of the lower shell (2) and communicated with the air outlet cavity (22); a connecting hole (611) is provided on the limiting cavity (61); and the second pressure regulating cavity (24) is communicated with the air outlet cavity (22) through the connecting hole (611).
6. The pressure regulating valve according to claim 5, characterized in that: The first steel ball (62) has an initial position and a blocking position in the limiting cavity (61); when the first steel ball (62) is in the initial position, the first steel ball (62) blocks the connecting hole (611); when the air flow rate reaches a set amount, the first steel ball (62) is blown from the initial position to the blocking position, and the first steel ball (62) blocks the air outlet (221).
7. The pressure regulating valve according to claim 2, characterized in that: A switch assembly (7) partially extending into the first pressure regulating chamber (23) is movably provided on the lower housing (2), and the switch assembly (7) is used to drive the push rod (31) to move in a direction approaching or away from the air inlet chamber (21) so as to connect or disconnect the gas cylinder.
8. The pressure regulating valve according to claim 7, characterized in that: The switch assembly (7) comprises a rotating portion (71) rotatably disposed on the lower housing (2) and extending into the first pressure regulating chamber (23); the rotating portion (71) is provided with an eccentric portion (72) capable of abutting against the push rod (31) to drive the push rod (31) to move in a direction approaching or away from the air inlet chamber (21).
9. The pressure regulating valve according to claim 8, characterized in that: The switch assembly (7) further comprises a handle (73) connected to the rotating portion (71) and extending from a side surface of the lower housing (2).
10. The pressure regulating valve according to claim 1, characterized in that: An air inlet hole is provided on the lower shell (2) at a position between the air inlet cavity (21) and the first pressure regulating cavity (23), and a filter element (8) is provided on the air inlet hole.