Front diving breathing equipment

Abstract

The utility model discloses front diving breathing equipment which comprises a circulating gas circuit, an oxygen supplementing gas circuit and a wrist-worn instrument. The gas purifier (100) comprises a barrel-shaped shell (10), a central pipe (30) and an end cover seat (20), and the central pipe is communicated with the air return end and the air supply end of the barrel-shaped shell. A clamping wall, a sensor bin and a battery bin are integrally arranged in a cylindrical cover body (21) of the end cover seat. The sensor compartment is adjacent to the battery compartment and protrudes towards the axial inner side from the plane where the clamping wall is located. An oxygen sensor (28) is mounted on a mounting hole in the axial inner side end of the sensor bin. And the electromagnetic regulating valve is assembled on the axial inner side of the clamping wall, is communicated with the central pipe and is controlled by a wrist-worn instrument. The front diving breathing equipment is simple and reliable in structure, smooth in air path and convenient to assemble.

Description

Technical Field

[0001] This application belongs to diving breathing equipment, and specifically relates to a closed diving breathing equipment. Background Art

[0002] In a pre-breathing device for closed diving (such as patent CN219687593U), the gas purifier is a horizontally placed cylinder, with the return air end connected to the exhalation buffer bag and the air supply end connected to the inhalation buffer bag.

[0003] The carbon dioxide absorption tank disclosed in patent CN219963695U / 2023 is used for diving equipment. A pair of filter plates (i.e., baffles) are axially spaced inside the cylindrical shell to form a purification agent chamber. The ventilation pipe passes through the centers of the two filter plates at both ends. Supplementary oxygen can enter the ventilation pipe from the oxygen tank interface and flow regulating valve at the air supply end, and mix with the exhaled air (return air) of the diver at the return air end. The attached drawings of the patent specification show that the control circuit board at the air supply end: radially isolates the internal space of the first end cap, has a battery compartment on its axially outer side, and an oxygen sensor on its axially inner side to monitor the oxygen partial pressure at the air supply end. Summary of the Utility Model

[0004] The technical problem to be solved by this utility model is how to improve the pre-breathing device to enhance safety.

[0005] In this specification, the exhaled air of the diver is called "return air" after flowing back into the gas purifier.

[0006] This utility model discloses a pre-diving breathing device. The pre-diving breathing device includes:

[0007] A circulating gas path, including a gas purifier, an inhalation buffer bag, a bite valve, and an exhalation buffer bag connected in clockwise order through a circulating pipeline;

[0008] An oxygen supply path, including a high-pressure oxygen cylinder, a manual oxygen supply valve, and an oxygen tee. The manual oxygen supply valve is assembled on the exhalation buffer bag. The high-pressure oxygen cylinder is connected to the intake end of the oxygen tee through secondary decompression. One outlet end of the oxygen tee is connected to the manual oxygen supply valve, and the other outlet end is connected to the gas purifier; and

[0009] A wrist-worn instrument;

[0010] In this pre-diving breathing device, the gas purifier includes:

[0011] A barrel-shaped housing, with the barrel mouth as the air supply end and the barrel bottom as the return air end. Two baffles are axially spaced inside;

[0012] A central tube, located inside the barrel-shaped housing, extends along the central axis, and its two ends penetrate through two baffles respectively, thereby connecting the air return end and the air supply end; and

[0013] An end cap seat, configured as a hollow member, seals the barrel opening of the barrel-shaped housing, and includes a cylindrical cover body, a sealing end plate, three oxygen sensors and an electromagnetic regulating valve;

[0014] Among them, the cylindrical cover body is an integrally formed part. The axially outer port is detachably sealed by the sealing end plate. The side wall is provided with a plurality of through holes to communicate with the suction buffer bag, penetrate the oxygen pipeline and penetrate the cable. Inside, there is integrally provided a partition wall perpendicular to the axis, a sensor chamber and a battery chamber;

[0015] The sensor chamber protrudes from the plane where the partition wall is located towards the axially inner side. The axially outer end is configured to be open, and the axially inner end is provided with mounting holes for installing oxygen sensors;

[0016] The battery chamber is used to load the battery, protrudes from the plane where the partition wall is located, is adjacent to the sensor chamber, and has a detachable cover at one end in the axial direction;

[0017] The electromagnetic regulating valve is fixedly assembled on the axially inner side of the partition wall. The air outlet end communicates with the central tube, and the air inlet end communicates with the high-pressure oxygen cylinder through the oxygen tee;

[0018] Among them, the wrist-worn instrument has an oxygen supplementation program module built in, and is electrically connected to the oxygen sensor and the electromagnetic regulating valve.

[0019] In some embodiments of the present application, it can be selected that the axially inner end faces of the battery chamber and the sensor chamber form a fan surface in the axial projection view and are adjacent to the inner wall of the cylindrical cover body.

[0020] In some embodiments of the present application, it can be selected that a central boss is provided at the center of the bottom surface of the barrel-shaped housing (10); one end of the central tube is threadedly engaged with the central boss, and a plurality of air outlet holes are provided on the side surface.

[0021] In some embodiments of the present application, it can be selected that a circular step is provided on the side wall of the bottom of the barrel-shaped housing to assemble one of the baffles and a conical protective cover; the protective cover is installed with its thicker end edge between the one baffle and the circular step, and its thinner end is close to the bottom surface of the barrel-shaped housing.

[0022] In some embodiments of the present application, it can be selected that a first clamping collar is movably sleeved on the outer wall of the barrel opening of the barrel-shaped housing, and a first locking member is fixedly provided; the first clamping collar is used to clamp the cylindrical cover body and is provided with a notch to clamp the first locking member.

[0023] In some embodiments of the present application, it can be selected that the end cap seat further includes a second clamping collar; the second clamping collar detachably clamps the barrel-shaped housing at the axially inner end and fixedly clamps the cylindrical cover at the axially outer end, and a second locking member is provided on the inner wall; the second locking member includes an inner wall protrusion and a locking screw, and the locking screw passes through the through hole of the inner wall protrusion and engages in the end face locking hole of the oxygen sensor chamber.

[0024] Implementing the technical solution of the present utility model can achieve the following beneficial effects.

[0025] The pre-dive breathing device disclosed by the present utility model includes a recirculation gas path, an oxygen supply path, and a wrist-worn instrument. Among them, the gas purifier includes a barrel-shaped housing, a central tube, and an end cap seat. The central tube connects the gas return end and the gas supply end of the barrel-shaped housing. An interlayer, a sensor chamber, and a battery chamber are integrally provided inside the cylindrical cover of the end cap seat. The sensor chamber is adjacent to the battery chamber and protrudes axially inward from the plane where the interlayer is located. The oxygen sensor is installed on the mounting hole at the axially inner end of the sensor chamber. The electromagnetic regulating valve for controlling the oxygen supply flow is assembled on the axially inner side of the interlayer, connects to the central tube, and is controlled by the wrist-worn instrument. This pre-dive breathing device has a simple and reliable structure, a smooth gas path, and is convenient for assembly. Description of the Drawings

[0026] The following drawings should be used in combination with the specific implementation part.

[0027] Figure 1 It is a schematic diagram of the composition of the pre-dive breathing device in Embodiment 1. The hollow arrow represents the recirculation gas flow, and the solid arrow represents the automatically supplemented oxygen flow;

[0028] Figure 2 It is a perspective view of the gas purifier in Embodiment 1;

[0029] Figure 3 It is an axial sectional view of the gas purifier in Embodiment 1. The central axis of the central tube and the barrel-shaped housing is marked as Y0, and the section corresponds to Figure 4a the auxiliary line Y1;

[0030] Figure 4a It is a front view of the axially inner side of the end cap seat in Embodiment 1. The section corresponding to the auxiliary line Y1 Figure 3 corresponds to the section, and the intersection of the auxiliary line Y1 and another auxiliary line corresponds to Figure 3 the central axis Y0;

[0031] Figure 4b It is a perspective view of the end cap seat in Embodiment 1;

[0032] Figure 5a It is a perspective view of the cylindrical cover in Embodiment 1, showing the axially inner side;

[0033] Figure 5 is another perspective view of the cylindrical cover in the first embodiment, showing the axially outer side. Detailed implementation manners

[0034] The following describes the embodiments with reference to the drawings.

[0035] In this specification, unless otherwise specified, an embodiment, some embodiments, and other embodiments are used to distinguish different embodiments, and do not refer to all embodiments; the drawings are schematic diagrams, not scale drawings; directions / positions indicated by top, bottom, center, edge, inner, outer, far, near, long, wide, longitudinal, transverse, up, down, front, back, left, and right are based on the viewing angle of the drawings and should not be understood as the components / devices being located at specific positions or facing specific directions; the serial words such as first, second, and third have no sequential meaning when used to distinguish components / devices with the same function / name.

[0036] In this specification, the exhaled air of the diver is called "return air" after flowing back into the gas purifier.

[0037] First embodiment

[0038] Disclose a front-mounted diving breathing device.

[0039] This front-mounted diving breathing device is used for single-person closed diving with a depth not exceeding 10 meters and a short time, so it only supplies air to the diver with high-pressure oxygen and does not set up a buoyancy adjustment airbag.

[0040] Please refer to Figure 1 , this front-mounted diving breathing device includes a circulating air path, a supplementary oxygen path, and a wrist-mounted instrument 880.

[0041] The circulating air path includes a gas purifier 100, an inhalation buffer bag 820, a bite valve 830, and an exhalation buffer bag 840 that are connected in a clockwise order through a circulating pipeline. The structure of the bite valve 830 can refer to Patent CN118289182A / 2024, and the structures of the inhalation buffer bag 820 and the exhalation buffer bag 840 can refer to Patent CN219687591U / 2023. When the internal air pressure in the exhalation buffer bag 840 is too high, it can exhaust air into the water through a mechanical automatic pressure relief valve 841.

[0042] The supplementary oxygen path includes a high-pressure oxygen cylinder 850, a manual oxygen supply valve 860, and an oxygen tee 870. The manual oxygen supply valve 860 is a switch valve, assembled on the exhalation buffer bag 840, and is used to manually supply oxygen into the circulating air path. The high-pressure oxygen cylinder 850 is monitored for its internal air pressure by an oxygen pressure gauge 851 and is connected to the inlet end of the oxygen tee 870 through secondary decompression (the relevant structure is not drawn). One outlet end of the oxygen tee 870 is connected to the manual oxygen supply valve 960, and the other outlet end is connected to the gas purifier 100.

[0043] The manually supplemented oxygen is mixed with the diver's exhaled air in the exhalation buffer bag 840.

[0044] Inside the gas purifier 100: Most of the space accommodates the gas purification agent. The recirculating gas is mixed with the automatically supplemented oxygen before contacting the purification agent. The automatically supplemented oxygen amount is controlled by the electromagnetic regulating valve 262. The gas after purification treatment is monitored for oxygen partial pressure by three oxygen sensors 28.

[0045] The wrist-worn instrument 880 is connected to the oxygen sensor 28 and the electromagnetic regulating valve 262 through a cable. It has a built-in oxygen supplementation program module for obtaining the sensing data of the oxygen sensor 28 and controlling the valve core position of the electromagnetic regulating valve 262. The structure of the wrist-worn instrument 880 can refer to the patent CN221138574U / 2023.

[0046] For other aspects of this pre-dive breathing equipment, reference can be made to the patent CN219687593U / 2023.

[0047] Please refer to Figure 2 and Figure 3 The gas purifier 100 includes a cylindrical barrel-shaped housing 10, a cylindrical central tube 30, a cylindrical end cap seat 20, a set of exhalation buffer bag connection components 31, and a set of inhalation buffer bag connection components 32.

[0048] After removing the buffer bag connection components, the remaining main body of the gas purifier 100 is cylindrical.

[0049] For the barrel-shaped housing 10, the barrel opening is the air supply end 102, and the barrel bottom is the return air end 102. Two baffles 141 and 142 are axially spaced inside to form a purification agent accommodation space.

[0050] On the outer side of the barrel bottom of the barrel-shaped housing 10, a three-dimensional decorative pattern 13 is provided. Thus, the shape of the return air end 101 is approximately the same as the air supply end 101 after installing the end cap seat 20.

[0051] On the side wall of the barrel bottom of the barrel-shaped housing 10, an annular step 18 is provided to assemble the baffle 142 and a conical protective cover 16.

[0052] The protective cover 16 is installed between the baffle 142 and the annular step 18 with its thicker end edge, and its thinner end is close to the bottom surface of the barrel bottom of the barrel-shaped housing 10, for adjusting the radial distribution of the recirculating gas and preventing water mist from contacting the purification agent.

[0053] On the outer wall of the mouth of the barrel-shaped housing 10, a first clamping collar 41 is movably sleeved, and a first locking member 11 is fixedly provided. The first clamping collar 41 is used to clamp the end cover seat 20 and is provided with a notch to clamp the first locking member 11. For the relevant structure, reference can be made to Patent CN221091194U / 2024. Note that the installation position of the first clamping collar in this patent is different from that in this embodiment.

[0054] At the center of the bottom surface of the barrel-shaped housing 10, a central boss 15 is provided for installing the central tube 30.

[0055] The central tube 30 is fixedly installed inside the barrel-shaped housing 10, extends along the central axis Y0, connects the above-mentioned gas return end 102 and the gas supply end 101, and can introduce the automatically replenished oxygen from the gas supply end 101 into the gas return end 102.

[0056] One end of the central tube 30 passes through the baffle 142, is threadedly engaged with the side wall of the central boss 15, and is provided with a plurality of air outlet holes 33 on the side.

[0057] The other end of the central tube 30 passes through the baffle 141, extends into the end cover seat 20 to connect with the electromagnetic regulating valve 262, is sleeved inside a compression spring 32, and a spring seat 31 is fixedly assembled on the outer wall to compress the compression spring 32. Thus, the baffle 141 can move axially on the central tube 30. An annular step is provided at this end of the ventilation tube 30 to limit the baffle 141.

[0058] The end cover seat 20 is configured as a hollow member and is sealed to the mouth of the barrel-shaped housing 10.

[0059] Please refer to Figure 4a and Figure 4b , the end cover seat 20 includes a cylindrical cover body 21, a second clamping collar 22, a sealing end plate 23, three oxygen sensors 28, a straight two-way 261, an electromagnetic regulating valve 262, a right-angled two-way 263, a cable connection seat 291 and a cable connection seat 292.

[0060] Figure 4a The auxiliary line Y1 in Figure 3 corresponds to the cross-section of Figure 3 and the intersection point with another auxiliary line corresponds to the central axis Y0 of

[0061] Please refer to Figure 5a and Figure 5b , the cylindrical cover body 21 is an integrally formed part, the axially outer port is detachably sealed by the sealing end plate 23, the side wall is provided with a plurality of through holes to connect the air intake buffer bag 820, pass through the oxygen pipeline and pass through the cable, and a vertical partition 211, a sensor chamber 213 and a battery chamber 212 are integrally provided inside.

[0062] The partition wall 211 is provided with a cable through-hole 211a for the cable of the electromagnetic regulating valve 262 to pass through.

[0063] The battery compartment 212 and the sensor compartment 213 are adjacent to each other and both protrude toward the inner side in the axial direction from the plane where the partition wall 211 is located. In the axial projection view, the inner end faces on the axial inner side of the two form a fan-shaped surface and are adjacent to the inner wall of the cylindrical cover body 21.

[0064] The battery compartment 212 has two compartments 212a and can hold two batteries. At both axial ends of the battery compartment 212, detachable covers 2121 and 2122 are provided. The covers 2121 and 2122 are both installed and fixed by assembly screws 202. With this structure, sufficient power can be ensured, and the installation and replacement of the batteries are also convenient.

[0065] The sensor compartment has an open configuration at its outer end in the axial direction and is provided with three mounting holes 213a at its inner end in the axial direction for mounting three oxygen sensors 28. With this structure, the main body of the oxygen sensor 28 is within the sensor compartment 213 and will not interfere with the air flow.

[0066] The electromagnetic regulating valve 262 is fixedly assembled on the inner side surface in the axial direction of the partition wall 211, and its cable passes through the partition wall through the cable through-hole 211a. Its air outlet end is connected to the central pipe 30 through a right-angle tee 263, and its air inlet end is connected to the high-pressure oxygen cylinder 850 through a straight tee 261 and an oxygen tee 870.

[0067] Specifically, the exhalation buffer bag connection assembly is embedded in the through-hole 21a of the cylindrical cover body 21. The straight tee 261 is embedded in the through-hole 21b of the cylindrical cover body 21, and the inner outer edge of the through-hole 21b is provided with a boss 215 for assembling the straight tee 261. The cable connection seats 291 and 292 are respectively embedded in two through-holes 21c of the cylindrical cover body 21. The annular end surface on the outer side in the axial direction of the cylindrical cover body 21 is provided with a number of screw holes 21d for assembling the end plate 23.

[0068] The second snap ring 22 is detachably snapped onto the first snap ring 41 at its inner end in the axial direction, thereby being assembled on the barrel mouth of the barrel-shaped housing 10 and extending into the barrel mouth of the barrel-shaped housing 10 to limit the baffle 141.

[0069] The second snap ring 22 is snapped onto the intermittent teeth 214 on the inner wall of the cylindrical cover body 21 at its outer end in the axial direction, and a second locking member is provided on its inner wall. The second locking member includes an inner wall protrusion 221 and a locking screw 201. The locking screw 201 passes through the through-hole of the inner wall protrusion 221 and meshes within the end face locking hole 213b of the oxygen sensor compartment 213. With this structure, the assembly process can be ensured to be simple, the assembled body is stable and reliable, and accidental accidents during diving operations can be reduced.

[0070] The technical advantages of this diving breathing equipment are:

[0071] 1) The structure of the gas purifier is simple and reliable, the gas path is smooth, and it is also convenient for assembly;

[0072] 2) It can automatically and manually supply air, suitable for single-person closed diving within 10 meters and for a short time, and can be used for primary diving training and amateur diving;

[0073] 3) The gas purifier has fewer electronic components, makes full use of the internal space of the end cap seat, and the battery can be used as a backup power supply for the wrist-mounted instrument.

[0074] In another approximate embodiment, the two baffles are serially assembled by three connecting pipes arranged in an equilateral triangle; the central pipe is only used for ventilation and not for fixedly assembling the two baffles. With this structure, the baffles are evenly stressed and not easily deformed.

[0075] Embodiment 2

[0076] Disclose a front-mounted diving breathing device.

[0077] Based on the front-mounted diving breathing device of Embodiment 1, the following improvements are made to this front-mounted diving breathing device: an additional high-pressure nitrogen cylinder or a high-pressure nitrogen-oxygen mixed gas cylinder is used as the air supply source, and a buoyancy adjustment vest that can be inflated and deflated is provided, so that it can be used for deep diving.

[0078] The above embodiments, application examples and technical analyses are intended to introduce the technical concept and characteristics of the present utility model, so that those skilled in the art can implement the technical solution of the present utility model, and do not constitute any limitation to the protection scope of the present utility model. Simple modifications and equivalent transformations of the above embodiments are all within the protection scope of the present utility model.

Claims

1. A front-mounted diving breathing device, comprising: A circulation air path, including a gas purifier (100), an inhalation buffer bag, a bite valve, and an exhalation buffer bag that are connected in a clockwise order through a circulation pipeline; An oxygen supply air path, including a high-pressure oxygen cylinder, a manual air supply valve, and an oxygen tee. The manual air supply valve is assembled on the exhalation buffer bag. The high-pressure oxygen cylinder is connected to the inlet end of the oxygen tee through secondary decompression. One outlet end of the oxygen tee is connected to the manual air supply valve, and the other outlet end is connected to the gas purifier; And A wrist-mounted instrument; It is characterized in that the gas purifier includes: A barrel-shaped housing (10), with the barrel opening as the air supply end and the barrel bottom as the air return end. Two baffles (141, 142) are axially spaced inside; A central tube (30), located inside the barrel-shaped housing, extending along the central axis, and passing through the two baffles at both ends in a one-to-one correspondence, thereby connecting the air return end and the air supply end; and An end cap seat (20), configured as a hollow member, sealing the barrel opening of the barrel-shaped housing, including a cylindrical cover body (21), a sealing end plate (23), three oxygen sensors (28), and an electromagnetic regulating valve (262); Among them, the cylindrical cover body is an integrally formed part. The axially outer port is detachably sealed by the sealing end plate. The side wall is provided with a plurality of through holes to connect the inhalation buffer bag, pass through the oxygen pipeline, and pass through the cable. Inside, there is integrally provided a partition wall (211) perpendicular to the axis, a sensor chamber (213), and a battery chamber (212); The sensor chamber protrudes from the plane where the partition wall is located towards the axially inner side. The axially outer end is configured as an open end, and the axially inner end is provided with an installation hole (213a) for installing an oxygen sensor; The battery chamber is used to load the battery, protrudes from the plane where the partition wall is located, is adjacent to the sensor chamber, and has a detachable cover at one end in the axis; The electromagnetic regulating valve is fixedly assembled on the axially inner side of the partition wall. The outlet end is connected to the central tube, and the inlet end is connected to the high-pressure oxygen cylinder through the oxygen tee; Among them, the wrist-mounted instrument has an oxygen supply program module built-in and is electrically connected to the oxygen sensor and the electromagnetic regulating valve.

2. The front-mounted diving breathing device according to claim 1, characterized in that The axially inner end faces of the battery chamber and the sensor chamber form a fan surface in the axial projection view and are adjacent to the inner wall of the cylindrical cover body.

3. The front-mounted diving breathing device according to claim 1, characterized in that A central boss is provided at the center of the bottom surface of the barrel bottom of the barrel-shaped housing (10); One end of the central tube is threadedly engaged with the central boss, and a plurality of air outlet holes are provided on the side.

4. The front-mounted diving breathing device according to claim 3, characterized in that One of the baffles is movable within a predetermined axial range; The other end of the central tube passes through the baffle and is sleeved inside a compression spring (32). A spring seat (31) is fixedly assembled on the outer wall to compress the compression spring, and the end is connected to the electromagnetic regulating valve.

5. The front-mounted diving breathing device according to claim 1, characterized in that On the side wall of the bottom of the barrel-shaped housing, there is an annular step (14) for assembling one of the baffles and a conical protective cover (16); The protective cover is installed with its thicker end edge between one of the baffles and the annular step, and its thinner end is close to the bottom surface of the barrel-shaped housing.

6. The pre-positioned diving breathing apparatus according to claim 1, wherein On the outer wall of the barrel opening of the barrel-shaped housing, a first clamping collar (41) is movably sleeved, and a first locking member (11) is fixedly provided; The first clamping collar is used for clamping the cylindrical cover body and is provided with a notch for clamping the first locking member.

7. The pre-positioned diving breathing apparatus according to claim 1 or 6, wherein The end cover seat further includes a second clamping collar (22); The second clamping collar detachably clamps the barrel-shaped housing at its axially inner end and fixedly clamps the cylindrical cover body at its axially outer end, and a second locking member is provided on its inner wall; The second locking member includes an inner wall protrusion and a locking screw, and the locking screw passes through the through hole of the inner wall protrusion and meshes with the end face locking hole of the oxygen sensor chamber.

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