Oxygen switching valve

Abstract

The invention provides an oxygen switching valve which comprises a valve body, a control cavity and three oxygen channels are formed in the valve body, the inner wall of one side of the control cavity is a control face, a control shaft is rotationally installed on the control face, a ring block is arranged on the control shaft, an abutting block is arranged on the side, close to the control face, of the ring block, and three control openings are formed in the control face and surround the control shaft. The three control ports are respectively communicated with each group of oxygen channels; one valve structure is arranged in each control port and is used for blocking the path of the corresponding oxygen channel. By rotating the control shaft, the abutting block is right opposite to the port position of the control port corresponding to the specified oxygen channel, so that the abutting block pushes the corresponding push head into the control port, the passage of the corresponding oxygen channel is opened, and rapid switching of oxygen conveying modes is achieved. According to the oxygen switching valve, oxygen channels of three oxygen conveying modes are integrated on the same valve body, and the oxygen modes are flexibly switched by rotating the control shaft, so that the space occupation amount of the oxygen switching valve is favorably reduced, and the mode switching efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen switching valves, and in particular to an oxygen switching valve. Background Art

[0002] On aircraft-borne equipment, the manual switching valve on the oxygen regulator that provides oxygen to pilots needs to have three switching modes: continuous mode, lung mode and emergency mode. At the same time, the manual valve needs to upload the switching mode information to the onboard display. At present, conventional oxygen switching valves are usually large in size, and the functions of each part are relatively independent. However, due to the limited storage space of aircraft-borne equipment, conventional oxygen switching valves will take up more space, which is not conducive to streamlining requirements and subsequent maintenance or overhaul. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention proposes an oxygen switching valve to solve the above problems.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The present invention provides an oxygen switching valve, comprising:

[0006] The valve body is provided with a control cavity and three groups of oxygen channels inside. The inner wall of one side of the control cavity is a control surface. A control shaft is axially rotatably mounted on the control surface. A ring block is provided on the control shaft. A gap is left between the ring block and the control surface. A stop block is provided on the side of the ring block close to the control surface. The distal end of the control shaft penetrates the valve body. Three control ports are provided on the control surface around the control shaft. The three control ports are respectively connected to each group of oxygen channels.

[0007] A valve structure is installed in each of the control ports to block the path of the corresponding oxygen channel. When the stop block faces a certain control port, the valve structure at the corresponding position can be driven to conduct the corresponding oxygen channel.

[0008] Furthermore, the oxygen channel includes a wide channel area, an active area and a delivery area, the active area is connected to the control port, the wide channel area is arranged at one end of the active area away from the control port and is externally connected to an oxygen delivery device, the size of the wide channel area is larger than the size of the active area, and the delivery area is arranged on one side of the active area and is externally connected to a corresponding oxygen device.

[0009] Furthermore, the valve structure includes a baffle, a connecting rod and a push head. The connecting rod is located in the oxygen channel, one end of which faces the control port and is provided with a push head that slides tightly with the inner wall of the control port, the other end of the connecting rod faces the wide channel area and is provided with a baffle, and the baffle is provided with a blocking piece whose size is larger than the size of the active area. A spring is connected between the baffle and the inner wall of the wide channel area to provide elastic force to push the push head of the connecting rod out of the control port and make the blocking piece close to the junction of the wide channel area and the active area.

[0010] Furthermore, the edge of the stop block is smoothly connected with the circular arc of the ring block, and the end of the push head away from the connecting rod is an arc end.

[0011] Furthermore, two micro switches are provided on the side wall of the control cavity radially corresponding to two of the control ports, the micro switches are externally connected to a display device, and a pressure plate is rotatably connected to one side of the micro switch close to the ring block, and a torsion spring is installed at the rotation connection point of the pressure plate to provide elastic force to make the pressure plate abut against the side wall of the ring block, and a touch pressure switch is provided on the side of the micro switch close to the pressure plate, and a protrusion is provided on one side of the ring block, and when the control shaft rotates to make the protrusion push a certain pressure plate, the abutment block will face the corresponding control port.

[0012] Furthermore, three arc grooves are provided on the edge of the ring block, a rotating rod is rotatably installed on the control surface, and an inserted ball adapted to the arc groove is provided on the side of the rotating rod close to the ring block, a tension spring is connected between the distal end of the rotating rod and the side wall of the control cavity, and the tension spring can provide elastic force to turn the rotating rod to the side wall of the ring block, and when the stop block is facing a certain control port, the inserted ball can be stuck in the corresponding arc groove.

[0013] It can be seen from the above technical solution that the oxygen switching valve provided by the present invention:

[0014] By rotating the control shaft so that the stopper is aligned with the control port position corresponding to the designated oxygen channel, the stopper pushes the corresponding push head into the control port, and then drives the baffle and the blocking plate away from the junction of the wide channel area and the active area through the connecting rod, thereby opening the passage of the corresponding oxygen channel and realizing rapid switching of the oxygen delivery mode. The present invention integrates the oxygen channels of the three oxygen delivery modes into the same valve body, and flexibly switches the oxygen mode by rotating the control shaft, which is conducive to saving the space occupied by the oxygen switching valve and improving the mode switching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1It is a three-dimensional structural schematic diagram of an oxygen switching valve according to an embodiment of the present invention;

[0017] Figure 2 A cross-sectional view of a side structural schematic diagram of an oxygen switching valve according to an embodiment of the present invention;

[0018] Figure 3 A cross-sectional view of a schematic diagram of the main structure of an oxygen switching valve according to an embodiment of the present invention;

[0019] Reference numerals:

[0020] Valve body 1, control chamber 11, control surface 111, control port 112, rotating rod 113, inserted ball 114, tension spring 115, oxygen channel 12, wide channel area 121, active area 122, conveying area 123, control shaft 13, ring block 14, stop block 141, protrusion 142, arc groove 143, micro switch 15, pressing piece 151, touch switch 152;

[0021] Valve structure 2, baffle 21, blocking plate 211, connecting rod 22, push head 23, spring 24. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the invention is not limited by the specific implementation disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0024] 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.

[0025] like Figure 1-3 As shown, an oxygen switching valve provided in this embodiment includes a valve body 1 and a valve structure 2.

[0026] The valve body 1 is provided with a control chamber 11 and three groups of oxygen channels 12. The inner wall of one side of the control chamber 11 is a control surface 111. A control shaft 13 is axially rotatably mounted on the control surface 111. A ring block 14 is provided on the control shaft 13. There is a gap between the ring block 14 and the control surface 111. A stop block 141 is provided on the side of the ring block 14 close to the control surface 111. The stop block 141 is in contact with the control surface 111. The distal end of the control shaft 13 passes through the outside of the valve body 1 so that the control shaft 13 can be manually rotated. Three control ports 112 are provided around the control shaft 13 on the control surface 111. The three control ports 112 are respectively connected to each group of oxygen channels 12. By rotating the control shaft 13, the stop block 141 can be aligned with the port position of any control port 112. When each group of oxygen channels 12 is working, it corresponds to the continuous mode, lung mode and emergency mode of oxygen delivery.

[0027] like Figure 2 As shown, specifically, the oxygen channel 12 includes a wide channel area 121, an active area 122 and a delivery area 123. The active area 122 is connected to the control port 112. The wide channel area 121 is arranged at one end of the active area 122 away from the control port 112 and is externally connected to an oxygen delivery device. The size of the wide channel area 121 is larger than that of the active area 122. The delivery area 123 is arranged on one side of the active area 122 and is externally connected to a corresponding oxygen device.

[0028] A valve structure 2 is installed in each control port 112 to block the path of the corresponding oxygen channel 12 . When the stopper 141 faces a control port 112 , the valve structure 2 at the corresponding position can be driven to open the corresponding oxygen channel 12 .

[0029] like Figure 2 As shown, in one embodiment, the valve structure 2 includes a baffle 21, a connecting rod 22 and a push head 23. The connecting rod 22 is located in the oxygen channel 12, one end of which faces the control port 112 and is provided with a push head 23 that is tightly slidably fitted with the inner wall of the control port 112. The other end of the connecting rod 22 faces the wide channel area 121 and is provided with a baffle 21. The baffle 21 is provided with a blocking piece 211 whose size is larger than that of the active area 122. A spring 24 is connected between the baffle 21 and the inner wall of the wide channel area 121 to provide an elastic force to push the push head 23 of the connecting rod 22 out of the control port 112 and to make the blocking piece 211 close to the junction of the wide channel area 121 and the active area 122. It should be noted that no matter how the connecting rod 22 moves, there will always be a tightly fitted surface between the push head 23 and the inner wall of the control port 112.

[0030] Of course, in order to achieve sealing, sealing gaskets are provided on the outer wall of the push head 23 , the outer wall of the blocking piece 21 , and the side of the blocking piece 211 close to the active area 122 .

[0031] In the initial state, the valve structure 2 will block the passage of the oxygen channel 12 under the elastic force of the spring 24, and make the corresponding push head 23 protrude from the surface of the control surface 111. In specific use, by rotating the control shaft 13 so that the stop block 141 is directly opposite to the port position of the control port 112 corresponding to the specified oxygen channel 12, the stop block 141 pushes the corresponding push head 23 into the control port 112, and then drives the baffle 21 and the blocking plate 211 away from the junction of the wide channel area 121 and the active area 122 through the connecting rod 22, so as to open the passage of the corresponding oxygen channel 12 and realize the rapid switching of the oxygen delivery mode. The present invention integrates the oxygen channels 12 of the three oxygen delivery modes into the same valve body 1, and flexibly switches the oxygen mode by rotating the control shaft 13, which is conducive to saving the space occupied by the oxygen switching valve and improving the mode switching efficiency.

[0032] Preferably, the edge of the stopper 141 is smoothly connected with the arc of the ring block 14, and the end of the push head 23 away from the connecting rod 22 is an arc end, which is conducive to enabling the stopper 141 to push the push head 23 more smoothly.

[0033] like Figure 3 As shown, in one embodiment, two micro switches 15 are provided on the side wall of the control chamber 11 radially corresponding to two of the control ports 112. The two micro switches 15 and their radially corresponding oxygen channels 12 correspond to the continuous mode and the emergency mode of the oxygen mode, respectively, and the lung mode is the default mode of oxygen delivery. The micro switch 15 is externally connected to a display device. When the micro switch 15 is activated, its corresponding display device will display information. A pressing piece 151 is rotatably connected to the side of the micro switch 15 close to the ring block 14. A torsion spring (not shown) is installed at the rotation connection point of the pressing piece 151 to provide elastic force to make the pressing piece 151 abut against the side wall of the ring block 14. A touch switch 152 is provided on the side of the micro switch 15 close to the pressing piece 151. A protrusion 142 is provided on one side of the ring block 14. When the control shaft 13 rotates to make the protrusion 142 push against a certain pressing piece 151, the pressing piece 151 will press the touch switch 152 is used to start the micro switch 15, so that the corresponding display device can display information. At the same time, the stop block 141 will face the corresponding control port 112, and then press the push head 23 at the control port 112, so that the oxygen channel 12 at the corresponding mode position can be opened, thereby realizing that while the oxygen channel 12 corresponding to the oxygen mode is opened, the mode information can also be displayed on the external display device, so that the operator can understand the oxygen mode situation. By linking and integrating the external display configuration of the oxygen mode with the switching of the oxygen mode, the equipment can be further streamlined and more space can be saved.

[0034] In order to be able to accurately switch to the specified oxygen mode, such as Figure 3As shown, further, three arc grooves 143 are provided on the edge of the ring block 14, a rotating rod 113 is rotatably installed on the control surface 111, and an inserted ball 114 adapted to the arc groove 143 is provided on the side of the rotating rod 113 close to the ring block 14, and a tension spring 115 is connected between the distal end of the rotating rod 113 and the side wall of the control chamber 11, and the tension spring 115 can provide elastic force to turn the rotating rod 113 to the side wall of the ring block 14, and the three arc grooves 143 correspond to three control ports 112 respectively, when the stop block 141 is facing a certain control port 112, the inserted ball 114 can be stuck in the corresponding arc groove 143, and the operator can accurately grasp the relative position of the stop block 141 and the control port 112 by feeling the resistance when the control shaft 13 rotates.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An oxygen switching valve, characterized in that: include: The valve body is provided with a control cavity and three groups of oxygen channels inside. The inner wall of one side of the control cavity is a control surface. A control shaft is axially rotatably mounted on the control surface. A ring block is provided on the control shaft. A gap is left between the ring block and the control surface. A stop block is provided on the side of the ring block close to the control surface. The distal end of the control shaft penetrates the valve body. Three control ports are provided on the control surface around the control shaft. The three control ports are respectively connected to each group of oxygen channels. A valve structure is installed in each of the control ports to block the path of the corresponding oxygen channel. When the stop block faces a certain control port, the valve structure at the corresponding position can be driven to conduct the corresponding oxygen channel.

2. An oxygen switching valve according to claim 1, characterized in that: The oxygen channel includes a wide channel area, an active area and a delivery area. The active area is connected to the control port. The wide channel area is arranged at one end of the active area away from the control port and is externally connected to an oxygen delivery device. The size of the wide channel area is larger than that of the active area. The delivery area is arranged on one side of the active area and is externally connected to a corresponding oxygen device.

3. An oxygen switching valve according to claim 2, characterized in that: The valve structure includes a baffle, a connecting rod and a push head. The connecting rod is located in the oxygen channel, one end of which faces the control port and is provided with a push head that tightly slides with the inner wall of the control port. The other end of the connecting rod faces the wide channel area and is provided with a baffle. The baffle is provided with a blocking piece whose size is larger than that of the active area. A spring is connected between the baffle and the inner wall of the wide channel area to provide elastic force to push the push head of the connecting rod out of the control port and make the blocking piece tightly attached to the junction of the wide channel area and the active area.

4. An oxygen switching valve according to claim 3, characterized in that: The edge of the stop block is smoothly connected with the circular arc of the ring block, and the end of the push head away from the connecting rod is an arc end.

5. The oxygen switching valve according to claim 1, characterized in that: Two micro switches are arranged on the side wall of the control cavity radially corresponding to two of the control ports, the micro switches are externally connected to a display device, and a pressure plate is rotatably connected to one side of the micro switch close to the ring block, and a torsion spring is installed at the rotation connection point of the pressure plate to provide elastic force to make the pressure plate abut against the side wall of the ring block, and a touch switch is arranged on the side of the micro switch close to the pressure plate, and a protrusion is arranged on one side of the ring block, and when the control shaft rotates to make the protrusion push a certain pressure plate, the abutment block will face the corresponding control port.

6. The oxygen switching valve according to claim 1, characterized in that: Three arc grooves are arranged on the edge of the ring block, a rotating rod is rotatably mounted on the control surface, and an inserted ball adapted to the arc groove is arranged on the side of the rotating rod close to the ring block, a tension spring is connected between the distal end of the rotating rod and the side wall of the control cavity, and the tension spring can provide elastic force to turn the rotating rod to the side wall of the ring block, and when the stop block is facing a certain control port, the inserted ball can be stuck in the corresponding arc groove.

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