Gas purifier

Abstract

The utility model discloses a gas purifier. The gas purifier comprises a shell (10), a breather pipe (30) and an end cover seat (20), the ventilation pipe is communicated with the air return end and the air supply end of the shell. A clamping wall and a sensor bin are integrally arranged in a cylindrical cover body (21) of the end cover seat. The sensor bin 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 switch valve is assembled on the axial inner side of the clamping wall, is communicated with the breather pipe and is controlled by the wrist-worn instrument. The front-mounted 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] The gas purifier of the pre-breathing equipment for closed diving, such as disclosed in Patent CN219687593U, is horizontally placed in a cylindrical shape, 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 outer shell to form a purification agent bin. The ventilation pipe passes through the centers of the two filter plates at both ends. The supplementary oxygen can enter the ventilation pipe from the oxygen tank interface and flow regulating valve located at the air supply end and be mixed with the exhaled air (return air) of the diver at the return air end. The attached drawings of the patent specification show the control circuit board located at the air supply end: radially isolating the internal space of the first end cover, having a battery bin on its axially outer side surface and an oxygen sensor on its axially inner side surface 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 gas purifier of the pre-breathing equipment 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 gas purifier. The gas purifier is used for the pre-diving breathing equipment, and the main body is cylindrical, and it includes:

[0007] A housing, with one end in the long axis direction as the air supply end and the other end as the return air end, and two baffles are axially spaced inside;

[0008] A ventilation pipe, located inside the housing, parallel to the central axis, and passes through the two baffles at both ends in a one-to-one correspondence, thereby connecting the return air end and the air supply end; and

[0009] An end cover seat, configured as a hollow member, sealing the air supply end opening of the housing, including a cylindrical cover body, a sealing end plate, several oxygen sensors, and an electromagnetic switching valve;

[0010] 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 for connecting the inhalation buffer bag, passing through the oxygen pipeline, and passing through the cable, and there is a vertical partition wall and a sensor bin inside;

[0011] The sensor chamber bulges towards the inner side in the axial direction from the plane where the clamping wall is located. The outer end in the axial direction is configured to be open, and the inner end in the axial direction is provided with a mounting hole for mounting an oxygen sensor.

[0012] The electromagnetic switch valve is fixedly assembled on the inner side in the axial direction of the clamping wall. The air outlet end is communicated with the ventilation pipe, and the air inlet end is used for communicating with a high-pressure oxygen cylinder.

[0013] The oxygen sensor and the electromagnetic switch valve can be connected to a controller with a built-in oxygen supplementation program module through a cable.

[0014] In some embodiments of the present application, it can be selected that there is also a battery chamber inside the cylindrical cover body. The battery chamber is used for loading batteries, bulges from the plane where the clamping wall is located, is adjacent to the sensor chamber, and has a detachable cover at one end in the axial direction.

[0015] In some embodiments of the present application, it can be selected that the housing is configured in a barrel shape, and there is a central boss at the center of the bottom surface of the barrel bottom. One end of the ventilation pipe is threadedly engaged with the central boss, and there are several air outlet holes on the side.

[0016] 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 air supply end of the housing, and a first locking member 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.

[0017] In some embodiments of the present application, it can be selected that the end cover seat further includes a second clamping collar. The second clamping collar detachably clamps the housing at the inner end in the axial direction and fixedly clamps the cylindrical cover body at the outer end in the axial direction. There is a second locking member on the inner wall. The second locking member includes an inner wall protrusion and a locking screw. The locking screw passes through the through hole of the inner wall protrusion and is engaged in the end face locking hole of the oxygen sensor chamber.

[0018] Implementing the technical solution of the present utility model can obtain the following beneficial effects.

[0019] The present utility model discloses a gas purifier, which includes a housing, a ventilation pipe, and an end cover seat. The ventilation pipe communicates the air return end and the air supply end of the housing. Inside the cylindrical cover body of the end cover seat, there is an integrated clamping wall and a sensor chamber. The sensor chamber bulges towards the inner side in the axial direction from the plane where the clamping wall is located. The oxygen sensor is installed on the mounting hole at the inner end in the axial direction of the sensor chamber. The electromagnetic switch valve for controlling the oxygen supply airflow: is assembled on the inner side in the axial direction of the clamping wall, communicates with the ventilation pipe, and is controlled by a wrist-worn instrument. It is used for a pre-dive breathing device, has a simple and reliable structure, a smooth gas path, and is convenient for assembly. Description of the Drawings

[0020] The following drawings should be used in combination with the specific implementation part.

[0021] Figure 1In Embodiment 1, it is a schematic diagram of the components of the front-mounted diving breathing equipment. The hollow arrow represents the circulating air flow, and the solid arrow represents the automatically supplemented oxygen flow;

[0022] Figure 2 In Embodiment 1, it is a perspective view of the gas purifier;

[0023] Figure 3 In Embodiment 1, it is an axial sectional view of the gas purifier. The central axes of the ventilation pipe and the housing are marked as Y0, and the corresponding auxiliary line of the section is Y1; Figure 4a The corresponding auxiliary line Y1;

[0024] Figure 4a In Embodiment 1, it is a front view of the inner side of the end cap seat along the axis. The section corresponding to the auxiliary line Y1, and the intersection of the auxiliary line Y1 and another auxiliary line corresponds to Figure 3 The section, and the intersection of the auxiliary line Y1 and another auxiliary line corresponds to Figure 3 The central axis Y0;

[0025] Figure 4b In Embodiment 1, it is a perspective view of the end cap seat;

[0026] Figure 5a In Embodiment 1, it is a perspective view of the cylindrical cover body, showing the inner side along the axis;

[0027] Figure 5b In Embodiment 1, it is another perspective view of the cylindrical cover body, showing the outer side along the axis. Specific Embodiments

[0028] The following describes the embodiments with reference to the accompanying drawings.

[0029] In this specification, unless otherwise specified, one embodiment, some embodiments, and other embodiments are used to distinguish different embodiments and do not refer to all embodiments; the accompanying drawings are schematic diagrams, not scale drawings; the 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 accompanying drawings and should not be understood as the components / devices being located at specific positions and facing specific directions; the sequence words such as first, second, and third have no order meaning when used to distinguish components / devices with the same function / name.

[0030] In this specification, the exhaled air of the diver is called "return air" after flowing back into the gas purifier.

[0031] Embodiment 1

[0032] Disclosed is a gas purifier 100.

[0033] The gas purifier 100 is used for Figure 1 The front-mounted diving breathing equipment shown.

[0034] The front-mounted diving breathing equipment: It includes a recirculation gas circuit, an oxygen supply circuit, and a wrist-mounted instrument 880, and is used for single-person closed diving with a depth not exceeding 10 meters and a short time. It only supplies air to the diver with high-pressure oxygen and does not have a buoyancy adjustment airbag. If an additional high-pressure nitrogen cylinder or high-pressure nitrogen-oxygen mixed gas cylinder is used as the air supply source, a buoyancy adjustment airbag that can be inflated and deflated is provided, and it can be used for deep diving.

[0035] The recirculation gas circuit 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 recirculation 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 gas into the water through a mechanical automatic pressure relief valve 841.

[0036] The oxygen supply circuit includes a high-pressure oxygen cylinder 850, a manual oxygen supply valve 860, and an oxygen three-way joint 870. The manual oxygen supply valve 860 is a switch valve and is assembled on the exhalation buffer bag 840 for manually supplementing oxygen into the recirculation gas circuit. The high-pressure oxygen cylinder 850 has its internal air pressure monitored by an oxygen pressure gauge 851 and is connected to the inlet end of the oxygen three-way joint 870 through secondary decompression (the relevant structure is not shown). One outlet end of the oxygen three-way joint 870 is connected to the manual oxygen supply valve 960, and the other outlet end is connected to the gas purifier 100.

[0037] The manually supplemented oxygen is mixed with the exhaled air of the diver in the exhalation buffer bag 840.

[0038] Inside the gas purifier 100: Most of the space is filled with gas purifying agent. The recirculated gas is mixed with the automatically supplemented oxygen before contacting the gas purifying agent. The automatic oxygen supply flow rate is controlled by an electromagnetic switch valve 262, and the oxygen partial pressure of the purified gas is monitored by three oxygen sensors 28.

[0039] The wrist-mounted instrument 880 is connected to the oxygen sensors 28 and the electromagnetic switch valve 262 through a cable, and has a built-in oxygen supply program module for obtaining the sensing data of the oxygen sensors 28 and controlling the switch interval and switch duration of the electromagnetic switch valve 262. The structure of the wrist-mounted instrument 880 can refer to Patent CN221138574U / 2023.

[0040] Other aspects of the front-mounted diving breathing equipment can refer to Patent CN219687593U / 2023.

[0041] Please refer to Figure 2 and Figure 3, the gas purifier 100 includes a cylindrical barrel-shaped housing 10, a cylindrical air pipe 30, a cylindrical end cap seat 20, a set of exhaled gas buffer bag connection components 31, and a set of inhaled gas buffer bag connection components 32.

[0042] That is, for the gas purifier 100, after removing the buffer bag connection components, the remaining main body is cylindrical.

[0043] Housing 10: The barrel opening is the air supply end 102, and the barrel bottom is the air return end 102. Two baffles 141 and 142 are axially spaced inside to form a gas purifying agent accommodation space.

[0044] On the outer side of the barrel bottom of the housing 10, a three-dimensional decorative pattern 13 is provided. Thus, the shape of the air return end 101 is approximately the same as the air supply end 101 after installing the end cap seat 20.

[0045] On the side wall of the barrel bottom of the housing 10, an annular step 18 is provided to assemble the baffle 142 and a conical protective cover 16.

[0046] The protective cover 16 is installed with its thicker end edge between the baffle 142 and the annular step 18, and its thinner end is close to the bottom surface of the barrel bottom of the housing 10, for adjusting the radial distribution of the reflux gas and preventing water mist from contacting the gas purifying agent.

[0047] On the outer wall of the barrel opening of the 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 for clamping the end cap seat 20 and is provided with a notch for clamping 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.

[0048] At the center of the bottom surface of the barrel bottom of the housing 10, a central boss 15 is provided for installing the air pipe 30.

[0049] The air pipe 30 is fixedly installed inside the housing 10, extends along the central axis Y0, and connects the above-mentioned air return end 102 and air supply end 101, and can introduce the automatically replenished oxygen from the air supply end 101 into the air return end 102.

[0050] One end of the air pipe 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 holes 33 on the side.

[0051] The other end of the air pipe 30 passes through the baffle 141, extends into the end cap seat 20 to connect with the electromagnetic solenoid valve 262, is sleeved in 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 air pipe 30. An annular step is provided at this end of the air pipe 30 to limit the baffle 141.

[0052] The end cap seat 20 is configured as a hollow member and is sealed to the barrel opening of the housing 10.

[0053] Please refer to Figure 4a and Figure 4b , the end cap 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 joint 261, an electromagnetic switching valve 262, a right-angle two-way joint 263, a cable connection seat 291, and a cable connection seat 292.

[0054] Figure 4a the auxiliary line Y1 in Figure 3 the cross-section corresponding to Figure 3 the central axis Y0 of

[0055] 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 communicate with the suction buffer bag 820, to pass through the oxygen pipeline, and to 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.

[0056] The partition wall 211 is provided with a cable through hole 211a for the cable of the electromagnetic regulating valve 262 to pass through.

[0057] The battery chamber 212 and the sensor chamber 213 are adjacent to each other. Both protrude from the plane where the partition wall 211 is located towards the axially inner side. In the axial projection view, the axially inner end faces of the two form a fan-shaped surface and are adjacent to the inner wall of the cylindrical cover body 21.

[0058] The battery chamber 212 has two compartments 212a and can hold two batteries. At both ends of the battery chamber 212 in the axial direction, detachable chamber covers 2121 and 2122 are provided. The chamber covers 2121 and 2122 are both installed and fixed by assembly screws 202. With this structure, it can ensure sufficient power supply and is also convenient for the installation and replacement of the battery.

[0059] The sensor chamber has its axially outer end configured as an open end, and its axially inner end is provided with three mounting holes 213a for mounting three oxygen sensors 28. With this structure, the main body of the oxygen sensor 28 is within the sensor chamber 213 and will not interfere with the air flow.

[0060] The electromagnetic switching valve 262 is fixedly assembled on the axially inner side surface of the partition wall 211, and its cable passes through the partition wall through the cable through hole 211a. Its air outlet end communicates with the ventilation pipe 30 through the right-angle two-way joint 263, and its air inlet end communicates with the high-pressure oxygen cylinder 850 through the straight two-way joint 261 and the oxygen three-way joint 870.

[0061] Specifically, the exhalation buffer bag connection assembly is embedded in the through hole 21a of the cylindrical cover 21. The straight two-way pipe 261 is embedded in the through hole 21b of the cylindrical cover 21, and the inner outer edge of the through hole 21b is provided with a boss 215 for assembling the straight two-way pipe 261. The cable connection seats 291 and 292 are respectively embedded in two through holes 21c of the cylindrical cover 21. The annular end face on the axial outer side of the cylindrical cover 21 is provided with a plurality of screw holes 21d for assembling the end sealing plate 23.

[0062] The second clamping collar 22 detachably clamps the first clamping collar 41 at its axially inner end, so as to be assembled on the barrel opening of the housing 10, and extends into the barrel opening of the housing 10 to limit the baffle 141.

[0063] The second clamping collar 22 clamps the intermittent teeth 214 on the inner wall of the cylindrical cover 21 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 221 and a locking screw 201. The locking screw 201 passes through the through hole of the inner wall protrusion 221 and meshes with the end face locking hole 213b of the oxygen sensor chamber 213. With this structure, the assembly process can be ensured to be simple, the assembled body is stable and reliable, and accidents during diving operations can be reduced.

[0064] The technical advantages of this gas purifier are as follows:

[0065] 1) The structure is simple and reliable, the gas path is smooth, and it is also convenient for assembly;

[0066] 2) It can automatically and manually supplement oxygen, is suitable for single-person closed diving within 10 meters and with short time, and can be used for primary diving training or amateur diving;

[0067] 3) There are fewer electronic components, the internal space of the end cover seat is fully utilized, and the battery can be used as the dedicated power supply for the electromagnetic switch valve.

[0068] In another embodiment, the battery compartment can be cancelled, and the electromagnetic switch valve 262 is powered by an external power supply. It should be noted that when using an electromagnetic switch valve to control the oxygen supply flow, the power consumption is large, and sufficient power must be available to ensure diving safety.

[0069] In another embodiment, the housing is a dodecagonal prism-shaped cylinder, which is sealed by two end cover seats, thus facilitating assembly.

[0070] In another embodiment, the two baffles are assembled in series by three pipe fittings arranged in an equilateral triangle, and one of the pipe fittings is configured as a ventilation pipe. That is, the ventilation pipe can be eccentrically arranged so that the air outlet of the ventilation pipe is close to the return air inlet. With this structure, the force on the baffle is evenly distributed and it is not easy to deform.

[0071] The above embodiments, application examples and technical analyses are intended to introduce the technical concept and features 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. Any simple modification and equivalent transformation of the above embodiments are within the protection scope of the present utility model.

Claims

1. A gas purifier (100) for a pre - front diving breathing apparatus, with a cylindrical main body, characterized in that Comprising: A housing (10), one end in the long axis direction being the air supply end and the other end being the air return end, and two baffles (141, 142) are axially spaced inside; An air pipe (30), located inside the housing, parallel to the central axis, and both ends penetrate through the two baffles in 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 air supply end opening of the housing, including a cylindrical cover body (21), a sealing end plate (23), several oxygen sensors (28) and an electromagnetic switching valve (262); Wherein, 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 for connecting the suction buffer bag, passing through the oxygen pipeline and passing through the cable, and an axial perpendicular partition wall (211) and a sensor chamber (213) are provided inside; 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 an installation hole (213a) is provided at the axially inner end for installing the oxygen sensor; The electromagnetic switching valve is fixedly assembled on the axially inner side of the partition wall, the air outlet end is connected to the air pipe, and the air inlet end is used for connecting to a high-pressure oxygen cylinder; The oxygen sensor and the electromagnetic switching valve can be connected to a controller with a built-in oxygen replenishment program module through a cable.

2. The gas purifier according to claim 1, wherein A battery compartment is further provided inside the cylindrical cover body; The battery compartment is used for loading 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.

3. The gas purifier according to claim 2, wherein The axially inner end faces of the battery compartment and the sensor chamber form a fan-shaped surface in the axial projection view and are adjacent to the inner wall of the cylindrical cover body.

4. The gas purifier according to claim 1, wherein The housing (10) is configured as a barrel shape, and a central boss is provided at the center of the bottom surface of the barrel bottom; One end of the air pipe is threadedly engaged with the central boss, and a plurality of air outlet holes are provided on the side surface.

5. The gas purifier according to claim 4, wherein One of the baffles is movable within a predetermined axial range; The other end of the air pipe penetrates through the baffle and is sleeved inside a compression spring (32), and a spring seat (31) is fixedly assembled on the outer wall to compress the compression spring, and the end is connected to the electromagnetic switching valve.

6. The gas purifier according to claim 4, wherein An annular step (14) is provided on the side wall of the barrel bottom of the housing to assemble one of the baffles and a conical protective cover (16); The protective cover is installed between the one baffle and the annular step with the thicker end edge, and the thinner end is close to the bottom surface of the barrel bottom of the housing.

7. The gas purifier according to claim 1, wherein A first clamping collar (41) is movably sleeved on the outer wall of the air supply end of the housing, 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.

8. The gas purifier according to claim 1 or 7, wherein The end cap base further includes a second clamping collar (22); The second clamping collar detachably clamps the housing at its axially inner end and fixedly clamps the cylindrical cover at its 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.

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