Pressure reducing valve to prevent accidental opening

Abstract

This application discloses a pressure reducing valve designed to prevent accidental opening, comprising: a valve body including an inlet, an outlet, and a filling port, wherein the inlet and outlet are connected by a fluid channel; a control valve core movably mounted on the valve body, the control valve core including a sealing end for controlling the opening and closing of the fluid channel and an exposed control end, the control end being recessed; and a protective cover with a control handle, the protective cover having a protective position covering the filling port and a control position where the control handle interacts with the control end of the control valve core. The technical solution disclosed in this application avoids external interference to the control valve core by recessing the control end, and achieves rapid opening and closing of the control valve core and convenient access to the control handle by providing a control handle on the protective cover, thus balancing the convenience of pressure reducing valve control with the safety of preventing accidental opening; the protective cover, while housing the control handle, also provides additional protection for the filling port, preventing wear during use.

Description

Technical Field

[0001] This application relates to the field of fluid valves, and in particular to a pressure reducing valve that prevents accidental opening. Background Technology

[0002] Pressure reducing valves are common components in the fluid and high-pressure vessel industries. They generally include a valve body that provides a flow path, a control valve core mounted on the valve body, and a pressure reducing valve core. The control valve core controls the connection or disconnection between the flow path within the valve body and the fluid source. The pressure reducing valve core regulates the fluid pressure to a suitable value to meet the needs of subsequent loads. Depending on the required pressure reduction, the pressure reducing valve core can have multiple settings. In some scenarios, pressure reducing valves are typically installed directly on portable high-pressure vessels for convenient use. For example, in oxygen / air cylinders, the pressure reducing valve can be integrated into the cylinder valve, allowing the user to obtain a stable, low-pressure breathing gas from the high-pressure cylinder after connecting tubing and other components.

[0003] In existing technologies, pressure-reducing valves typically feature an exposed handwheel on the control valve core for easy valve opening and closing. This design may lead to accidental activation of the handwheel during storage and transportation, causing the valve to open unexpectedly and resulting in container depressurization, posing a potential hazard. Removing the handwheel to prevent accidental opening would require a special tool to operate the control valve core, creating a technical dilemma due to the inconvenience of accessing and using this tool.

[0004] Therefore, how to balance the ease of controlling the pressure reducing valve with the safety of preventing accidental opening of the pressure reducing valve has become a technical problem worthy of research. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides a pressure reducing valve to prevent accidental opening, comprising:

[0006] The valve body includes an air inlet, an air outlet, and an air filling port, wherein the air inlet and the air outlet are connected by a fluid channel;

[0007] A control valve core is movably mounted on the valve body. The control valve core includes a sealing end for controlling the opening and closing of the fluid passage and an exposed control end, wherein the control end is recessed.

[0008] A protective cover is provided with a control handle. The protective cover has a protective position that covers the air inlet and a control position that cooperates with the control end of the control valve core through the control handle.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] In one embodiment, the valve body is provided with a valve seat, the control valve core is screwed to the valve seat, and the control valve core rotates and moves relative to the valve seat under the drive of the control handle;

[0011] The control terminal is recessed relative to the outer end face of the valve seat.

[0012] In one embodiment, the sealing end is provided with a seal for closing the fluid channel, and the seal is a flexible seal.

[0013] In one embodiment, the control handle protrudes beyond the protective cover, the cross-section of the control handle is non-circular, and the control end is provided with a drive groove that matches the cross-section of the control handle.

[0014] In one embodiment, the protective cover is a single-end closed cylindrical structure with an expansion at the open end forming a mounting ring, and the control handle is fitted onto the mounting ring.

[0015] In one embodiment, the extension direction of the control handle intersects the axial direction of the cylindrical structure of the protective cover.

[0016] In one embodiment, the inflation port and the control valve core are located on both sides of the valve body, the inflation port protrudes outward from the valve body, the protective cover has a plug-in cavity, and in the protected position, the inflation port is located in the plug-in cavity.

[0017] In one embodiment, the inflation port has an annular protrusion on its outer periphery, and the protective cover has a sealing ring inside. In the protected position, the annular protrusion and the sealing ring cooperate with each other to achieve mutual positioning of the inflation port and the protective cover.

[0018] In one embodiment, the inflation port is connected to the fluid channel and the connection position is located between the control valve core and the air inlet. The inflation port is provided with a one-way valve core, which only allows fluid to enter the fluid channel from the inflation port.

[0019] In one embodiment, the valve body is further provided with a first valve chamber and a second valve chamber that are interconnected, and the first valve chamber and the second valve chamber are located between the control valve core and the air outlet in the fluid channel;

[0020] The pressure reducing valve also includes a primary pressure reducing valve core located in the first valve chamber and a secondary pressure reducing valve core located in the second valve chamber.

[0021] The technical solution disclosed in this application avoids external interference to the control valve core by recessing the control end. By setting a control handle on the protective cover, the control valve core can be opened and closed quickly and the control handle can be easily accessed, thus balancing the convenience of pressure reducing valve control and the safety of avoiding accidental opening of the pressure reducing valve. The protective cover not only accommodates the control handle but also provides additional protection for the air inlet, avoiding wear during use.

[0022] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with specific structures or steps. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a pressure reducing valve structure for preventing accidental opening in one embodiment of this application;

[0024] Figure 2 for Figure 1 A cross-sectional schematic diagram of the pressure reducing valve designed to prevent accidental opening, viewed from an AA perspective;

[0025] Figure 3 for Figure 2 A schematic diagram showing the fit of the protective cover of the pressure reducing valve in the control position when it is in the anti-accidental opening position;

[0026] Figure 4 for Figure 1 A cross-sectional view of the pressure reducing valve designed to prevent accidental opening, as seen from the BB perspective;

[0027] Figure 5 A schematic diagram of the protective cover and control handle structure;

[0028] Figure 6 A schematic diagram showing the fit between the protective cover and the control handle.

[0029] The annotations in the figure are explained as follows:

[0030] 100. Valve body; 101. Control chamber; 102. Inflation chamber; 110. Air inlet; 111. Filter body; 120. Air outlet; 130. Inflation port; 131. Annular protrusion; 132. One-way valve core;

[0031] 200, Control valve core; 210, Sealing end; 211, Seal; 220, Control end; 221, Drive groove; 230, Valve seat;

[0032] 300, Protective cover; 301, Positioning groove; 310, Mounting ring; 320, Insertion cavity; 321, Connecting micro-hole; 330, Sealing ring; 340, Control handle;

[0033] 410. Primary pressure reducing valve core; 420. Secondary pressure reducing valve core;

[0034] 500. Safety valve core;

[0035] 900, Fluid passage; 901, Air inlet passage; 902, Control passage; 903, Safety passage. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0038] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] This application discloses a pressure reducing valve to prevent accidental opening, including a valve body 100, a control valve core 200 movably mounted on the valve body 100, and a control handle 340 for controlling the control valve core 200. The control handle 340 is disposed on a protective cover 300, which has a protective position covering the inflation port 130 (see attached drawing). Figure 1 and appendix Figure 2 (as shown) and the control position (see attached) through the interaction of the control handle 340 and the control valve core 200. Figure 3 (As shown). In the protected position, the protective cover 300 isolates the inflation port 130 from the outside environment to provide protection, while the inflation port 130 provides positioning for the protective cover 300 and the control handle 340 located on the protective cover 300. In the controlled position, the control handle 340 on the protective cover 300 can drive the control valve core 200, thereby opening or closing the pressure reducing valve.

[0040] Reference Appendix Figure 1 To be continued Figure 4As shown, the valve body 100 specifically includes an air inlet 110, an air outlet 120, and an air filling port 130, with the air inlet 110 and the air outlet 120 connected by a fluid channel 900. The control valve core 200 includes a sealing end 210 for controlling the opening and closing of the fluid channel 900 and an exposed control end 220, with the control end 220 recessed to avoid accidental activation.

[0041] For specific settings of control valve core 200, please refer to the attached document. Figure 2 To be continued Figure 3 As shown, a valve seat 230 is provided on the valve body 100, and a control valve core 200 is screwed onto the valve seat 230. The control valve core 200 rotates and moves relative to the valve seat 230 under the drive of the control handle 340. The valve seat 230 has a cylindrical structure, with its outer circumferential surface screwed onto the valve body 100 for positioning, and its inner circumferential surface screwed onto the control end 220 to drive the control valve core 200. The control end 220 is recessed relative to the outer end face of the valve seat 230. In other embodiments, the control valve core 200 can also be directly screwed onto the valve body 100, and the control valve core 200 rotates and moves relative to the valve body 100 under the drive of the control handle 340, with the control end 220 recessed relative to the outer end face of the valve body 100. The control end 220 is provided with a drive groove 221 for accommodating the control handle 340. The drive groove 221 matches the cross-section of the control handle 340 to achieve a plug-in fit. To transmit torque, the cross-sectional shape of the drive groove 221 is non-circular. To reduce the driving torque of the control valve core 200 and improve the operating feel of the control handle 340, a sealing element 211 for closing the fluid passage 900 is provided on the sealing end 210. The sealing element 211 is a flexible sealing element. Specifically, the valve body 100 is provided with a control chamber 101 for mounting the control valve core 200 and an inflation chamber 102 for mounting the inflation port 130. The fluid passage 900 includes an air inlet passage 901 connecting the air inlet 110 and the inflation chamber 102, and a control passage 902 connecting the inflation chamber 102 and the control chamber 101. The sealing element 211 is used to open or close the connection between the control passage 902 and the control chamber 101. The term "flexible" for seal 211 refers to its hardness being lower than that of valve body 100. This can be achieved using different materials; for example, valve body 100 can be made of metal or alloy, while seal 211 can be made of polymer. The flexible seal 211 enables efficient sealing under lower mating stress, thereby reducing the driving force required for control valve core 200 and improving the operating feel of control handle 340.

[0042] For details on the specific configuration of the control handle 340, which is matched with the control terminal 220 of the control valve core 200, please refer to the appendix. Figure 2 Appendix Figure 3 Appendix Figure 5 and appendix Figure 6In the illustrated embodiment, the control handle 340 protrudes outward from the protective cover 300. The cross-section of the control handle 340 is non-circular, and the control end 220 has a drive groove 221 that matches the cross-section of the control handle 340. In this embodiment, the cross-section of the control handle 340 is a regular polygon. The polygon is preferably one of triangle, quadrilateral, pentagon, or hexagon. The control handle 340 and the protective cover 300 can be an integral structure or a separate assembly structure as shown in this embodiment. The protective cover 300 has a positioning groove 301, into which the control handle 340 is inserted. The control handle 340 can be positioned with the positioning groove 301 by tight fitting, or by bonding, welding, snap-fitting, fasteners, positioning pins, etc.

[0043] The specific configuration of the protective cover 300 is independent of the configuration of the control handle 340; please refer to the appendix for details. Figure 2 Appendix Figure 5 In the illustrated embodiment, the protective cover 300 is a single-end closed cylindrical structure, with the open end enlarged to form a mounting ring 310, to which the control handle 340 is fitted. Preferably, the extension direction of the control handle 340 intersects the axial direction of the cylindrical structure of the protective cover 300. (See attached...) Figure 5 In the illustrated embodiment, the extension direction of the control handle 340 is perpendicular to the axial direction of the cylindrical structure of the protective cover 300. This arrangement causes the axial direction of the protective cover 300 to extend radially in relation to the control handle 340, forming an eccentric portion relative to the control handle 340, thereby facilitating the operator to apply rotational torque to the control handle 340 through the protective cover 300.

[0044] The cylindrical structure of the protective cover 300 provides accommodating space to improve protection of the inflation port 130. (See attached document) Figure 1 and attached Figure 2 In the illustrated embodiment, the cylindrical structure of the protective cover 300 provides a insertion cavity 320. The inflation port 130 protrudes outward from the valve body 100. The protective cover 300 has an insertion cavity 320 within it. In the protected position, the inflation port 130 is located within the insertion cavity 320. The protective cover 300 can directly close the inflation port 130 to provide airtight protection, or it can be partially open. (See attached figure.) Figure 2 As shown, the protective cover 300 has a connecting microhole 321 on the end facing away from the open side. The connecting microhole 321 connects the insertion cavity 320 to the outside.

[0045] In this embodiment, the inflation port 130 and the control valve core 200 are located on opposite sides of the valve body 100. This arrangement facilitates the movement of the components within the valve body 100 while also allowing the operator to easily observe the status of the protective cover 300 and to access and store the protective cover 300 and the control handle 340. The protective cover 300 can be directly positioned to the inflation port 130 through dimensional matching, or it can be referenced in the appendix. Figure 1 and attached Figure 2In the illustrated embodiment, the sealing ring 330 improves the feel of the fit. In this embodiment, an annular protrusion 131 is provided on the outer periphery of the inflation port 130, and a sealing ring 330 is provided inside the protective cover 300. In the protected position, the annular protrusion 131 and the sealing ring 330 cooperate to achieve mutual positioning of the inflation port 130 and the protective cover 300. Furthermore, the sealing ring 330 has multiple rings spaced apart, and in the protected position, the annular protrusion 131 is located between two sealing rings 330. The inner diameters of the two sealing rings 330 are different to accommodate different positions of the inflation port 130.

[0046] In the fluid channel 900, the inflation port 130 is connected to the fluid channel 900 and is located between the control valve core 200 and the air inlet 110. Specifically, the inflation port 130 is connected to the control channel 902 and the air inlet channel 901 through the inflation chamber 102. To avoid the inflation port 130 affecting the fluid channel 900, a one-way valve core 132 is provided inside the inflation port 130. The one-way valve core 132 only allows fluid to enter the fluid channel 900 from the inflation port 130. The fluid channel 900, after the control valve core 200, also includes a first valve chamber and a second valve chamber that are interconnected. The first valve chamber is equipped with a first-stage pressure reducing valve core 410, and the second valve chamber is equipped with a second-stage pressure reducing valve core 420. The fluid medium in the pressure vessel passes through the air inlet 110 and the control valve core 200, and is subsequently pressure-reduced by the first-stage pressure reducing valve core 410 and the second-stage pressure reducing valve core 420 before reaching the air outlet 120. The pressure reducing valve also includes a safety valve core 500 and a safety flow channel 903 connecting the air inlet 110 to the outside. When the fluid pressure at the air inlet 110 exceeds a preset value, the safety valve core 500 opens the safety flow channel 903 to release the fluid pressure to the outside. The air inlet 110 is equipped with a filter 111 to prevent foreign objects from entering the fluid passage 900. The parts of the pressure reducing valve not described in detail can be implemented using existing technology.

[0047] The protective cover 300 in this application can protect the inflation port 130, control the opening and closing of the valve core 200, and store the control handle 340 in different scenarios, achieving a synergistic effect of three benefits in one, and providing a pressure reducing valve structure with high safety and good operating experience.

[0048] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0049] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A misoperation preventing pressure reducing valve characterized by comprising: include: The valve body includes an air inlet, an air outlet, and an air filling port, wherein the air inlet and the air outlet are connected by a fluid channel; A control valve core is movably mounted on the valve body. The control valve core includes a sealing end for controlling the opening and closing of the fluid passage and an exposed control end, wherein the control end is recessed. A protective cover is provided with a control handle. The protective cover has a protective position that covers the air inlet and a control position that cooperates with the control end of the control valve core through the control handle.

2. The mis-prime resistant pressure reducing valve of claim 1, wherein, The valve body is provided with a valve seat, and the control valve core is screwed to the valve seat. The control valve core rotates and moves relative to the valve seat under the drive of the control handle. The control terminal is recessed relative to the outer end face of the valve seat.

3. The pressure reducing valve for preventing accidental opening according to claim 1, characterized in that, The sealing end is provided with a sealing element for closing the fluid channel, and the sealing element is a flexible sealing element.

4. The pressure reducing valve for preventing accidental opening according to claim 1, characterized in that, The control handle protrudes outward from the protective cover, and the cross-section of the control handle is non-circular. The control end is provided with a drive groove that matches the cross-section of the control handle.

5. The pressure reducing valve for preventing accidental opening according to claim 1, characterized in that, The protective cover is a cylindrical structure closed at one end, and the expansion at the open end forms a mounting ring, to which the control handle is fitted.

6. The pressure reducing valve for preventing accidental opening according to claim 5, characterized in that, The extension direction of the control handle intersects the axial direction of the cylindrical structure of the protective cover.

7. The pressure reducing valve for preventing accidental opening according to claim 1, characterized in that, The inflation port and the control valve core are located on both sides of the valve body, the inflation port protrudes outward from the valve body, and the protective cover has a plug-in cavity. In the protected position, the inflation port is located in the plug-in cavity.

8. The pressure reducing valve for preventing accidental opening according to claim 7, characterized in that, The inflation port has an annular protrusion on its outer periphery, and the protective cover has a sealing ring inside. In the protected position, the annular protrusion and the sealing ring cooperate with each other to achieve mutual positioning of the inflation port and the protective cover.

9. The pressure reducing valve for preventing accidental opening according to claim 8, characterized in that, The inflation port is connected to the fluid channel and the connection position is located between the control valve core and the air inlet. The inflation port is provided with a one-way valve core, which only allows fluid to enter the fluid channel from the inflation port.

10. The pressure reducing valve for preventing accidental opening according to claim 1, characterized in that, The valve body is also provided with a first valve chamber and a second valve chamber that are interconnected. In the fluid channel, the first valve chamber and the second valve chamber are located between the control valve core and the air outlet. The pressure reducing valve also includes a primary pressure reducing valve core located in the first valve chamber and a secondary pressure reducing valve core located in the second valve chamber.

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