Double-closed-loop circulation respirator air supply module

Abstract

The utility model belongs to the technical field of underwater breathing apparatuses, and particularly discloses a double-closed-loop circulation breathing apparatus air supply module which comprises a module main shell, the upper end of the module main shell is communicated with two sets of air outlet assemblies with an air non-return function, and a switching rod used for switching channels of the air outlet assemblies is installed in the module main shell. The switching rod is adjusted through a switching knob, a gas inlet assembly with a gas non-return function is arranged at the lower end of the module main shell, the interiors of the two opposite sides of the module main shell are communicated with a sequence type needle valve and a gas adding valve in a sealed mode, and sequence type stable increasing of pure oxygen gas flow can be achieved by adjusting different gears of the sequence type needle valve. Through the cooperation of the switching rod, the switching knob, the sequence type needle valve and the two air outlet assemblies, sequence type stable increasing of pure oxygen flow can be achieved by adjusting different gears of the sequence type needle valve, and the pure oxygen supply requirements under different conditions during diving are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to diving breathing apparatus technical field, concretely is double closed circuit breathing apparatus gas supply module. BACKGROUND

[0002] The gas supply module for diving breathing apparatus is mainly used for adjusting and supplying oxygen or compressed air required by divers for underwater breathing, and the common gas supply module on the market is a needle valve type gas supply module. The needle valve type gas supply module mainly controls the flow of gas by adjusting the opening degree of the needle valve. The flow cross section of the needle valve can be changed with the rotation of the valve rod, so as to adjust the flow of gas through the valve. When the valve rod rotates, the gap between the valve needle and the valve seat changes, thereby affecting the flow rate of the gas. Since the adjustment accuracy of the needle valve is high, the demand for accurate control of the flow of gas during diving can be met.

[0003] However, since the needle valve in the current needle valve type gas supply module is usually designed to adjust a specific gas flow and pressure range, the size and number of the gas outlets are determined according to this demand, so there is usually only a single gas outlet, which means that it can only be used for a single machine. During diving, as the diving depth increases and the labor intensity of the diver changes, the demand for gas flow will also change. If the gas supply module cannot flexibly adjust and stably increase the flow, it may not be able to meet the gas supply demand of the diver in different situations. Therefore, we need to propose a double closed circuit breathing apparatus gas supply module to solve the above problems, so that it can adjust different gears and realize the sequential stable increase of the flow of pure oxygen gas, to meet the pure oxygen gas supply demand in different diving situations. SUMMARY

[0004] The utility model aims at providing double closed circuit breathing apparatus gas supply module, can adjust different gears through the knob cover of sequential needle valve, realize the sequential stable increase of the flow of pure oxygen gas, meet the pure oxygen gas supply demand in different diving situations, to solve the problem proposed in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a double closed circuit breathing apparatus gas supply module, comprising a module main shell, two groups of gas check function gas outlet assemblies are communicated at the upper end of the module main shell, a switching rod for switching the passage of the gas outlet assembly is installed in the inside of the module main shell, the switching rod is adjusted through a switching knob, the switching knob is installed on the side wall of the module main shell, a gas inlet assembly with gas check function is arranged at the lower end of the module main shell, a sequential needle valve and a gas adding valve are sealingly communicated in the inside of the opposite sides of the module main shell, adjusting different gears of the sequential needle valve can realize the sequential stable increase of the flow of pure oxygen gas.

[0006] Preferably, the outer wall of the switching rod is provided with two annular groove sections corresponding to the two gas outlet assemblies respectively, each annular groove section is composed of a plurality of equidistantly arranged first annular grooves, and each first annular groove is provided with a fifth sealing ring; when one of the annular groove sections is aligned with one of the gas outlet assemblies, the other annular groove section is not aligned with the other gas outlet assembly; and a slot hole connected with the switching knob is arranged on the switching rod between the two annular groove sections.

[0007] Preferably, the switching knob comprises a knob block, one end of the knob block is sleeved with a sun-shaped fitting, one end of the knob block is fixed with a connecting shaft penetrating through the sun-shaped fitting, one end of the connecting shaft is rotationally connected with the side wall of the module main shell, the other end of the sun-shaped fitting is located in the interior of the slot hole, and the sun-shaped fitting located in the slot hole is rotationally connected with the switching rod through a hexagonal screw.

[0008] Preferably, the knob block is provided with a limiting protrusion on the side close to the module main shell, the module main shell is provided with a mounting hole for mounting the knob block, and the inner wall of the mounting hole is provided with a clamping groove for limiting the limiting protrusion.

[0009] Preferably, the sequential needle valve comprises a needle valve shell, a needle valve inner core is threadedly connected in the interior of the needle valve shell, the needle head of the needle valve inner core is arranged in a micro-tapered mode, a tapered recess corresponding to the needle head is arranged on the needle valve shell, a gear plate is fixedly sleeved on one end of the needle valve inner core, a plurality of holes are formed in the gear plate, a knob cover is arranged on one end of the needle valve shell, an elastic bullet head for plugging one of the holes to adjust the gear is mounted in the knob cover, and a blind hole for mounting the elastic bullet head is formed in the side of the knob cover relative to the gear plate.

[0010] Preferably, an outer thread section is arranged on the outer wall of the gear plate, an inner thread for screwing the gear plate is arranged in the interior of the needle valve shell, a hexagonal bolt is arranged on one end of the needle valve inner core penetrating through the center thread of the gear plate, and an inner hexagonal groove for inserting the hexagonal bolt is formed in the side of the knob cover relative to the blind hole.

[0011] Preferably, the gas outlet assembly and the gas inlet assembly each comprise a connecting head and a gas check valve sealingly mounted at one end of the connecting head, and the other end of the gas check valve is sealingly connected with the side wall of the module main shell.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1、The utility model discloses a switching rod, a switching knob, a sequential needle valve and two gas outlet assemblies are matched, and the sequential stable increment of pure oxygen gas flow can be realized by adjusting different gears of the sequential needle valve, so that the pure oxygen gas supply demand under different conditions when diving is satisfied.

[0014] 2, the utility model discloses the cooperation of switching rod, switching knob and two air outlet assemblies, utilize switching knob to be able to one -key switching the route of gas flow, realize double machine diving, thereby prolong the diving time of also can be used as backup guarantee, namely when one machine failure can switch to another machine and continue diving, for the development of long -time underwater operation has further promotion, and the supply of single gas source can guarantee the simplicity and stability of operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is the sectional structure schematic diagram of the utility model;

[0017] Figure 3 It is the utility model Figure 2 It is the enlarged structure schematic diagram of A place in the utility model;

[0018] Figure 4 It is the back structure schematic diagram of the utility model;

[0019] Figure 5 It is the switching knob and switching rod connecting structure schematic diagram of the utility model;

[0020] Figure 6 It is the switching knob structure schematic diagram of the utility model;

[0021] Figure 7 It is the sequence needle valve structure schematic diagram of the utility model;

[0022] Figure 8 It is the gas adding valve structure schematic diagram of the utility model.

[0023] In the drawing: 1, module main shell;2, air outlet assembly;21, connecting head;22, gas check valve;23, first sealing ring;24, second sealing ring;3, sequence needle valve;31, knob cover;32, needle valve inner core;33, blind hole;34, inner hexagonal groove;35, gear plate;36, third sealing ring;4, switching knob;41, knob block;42, limit protrusion;43, day-shaped fitting;44, connecting shaft;5, switching rod;51, first annular groove;52, slot hole;53, hexagonal screw;6, gas adding valve;61, round cover;62, adding valve core main body;7, air inlet assembly. DETAILED DESCRIPTION

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-8 This utility model provides a technical solution: a dual closed-loop respirator air supply module, including a module main shell 1. The upper end of the module main shell 1 is connected to two sets of gas outlet components 2 with gas check function. The inside of the module main shell 1 is installed a switching rod 5 for switching the passage of the gas outlet components 2. The switching rod 5 is adjusted by a switching knob 4. The switching knob 4 is installed on the side wall of the module main shell 1. The lower end of the module main shell 1 is provided with an air inlet component 7 with gas check function. The opposite sides of the module main shell 1 are internally sealed and connected to a sequential needle valve 3 and a gas adding valve 6. Adjusting different positions of the sequential needle valve 3 can achieve a sequential and stable increase in the pure oxygen gas flow rate, meeting the pure oxygen gas supply needs under different conditions during diving.

[0026] The outer wall of the switching rod 5 is provided with two annular grooves corresponding to the two air outlet components 2 respectively. Each annular groove is composed of multiple first annular grooves 51 arranged at equal intervals. A fifth sealing ring is installed at each first annular groove 51. The fifth sealing ring is used to ensure the airtightness of the module and the realization of a single gas passage. When one annular groove is aligned with one air outlet component 2, the other annular groove is not aligned with the other air outlet component 2. The switching rod 5 located between the two annular grooves is provided with a slot 52 for connecting to the switching knob 4. In use, the two air outlet components are connected to machine A and machine B respectively. In the initial state, one annular groove is aligned with one air outlet component 2 (e.g., Figure 2 In the middle, the left annular groove segment is aligned with the left air outlet component 2, while the other annular groove segment is not aligned with the other air outlet component 2 (e.g., Figure 2 In the middle section, the right annular groove section is not aligned with the right air outlet component 2, meaning that the air path of machine A is open while the air path of machine B is closed. By rotating the switching knob 4, the switching lever 5 moves within the main housing 1 of the module, thereby changing the air path of the other air outlet component 2. That is, the air path of machine A is closed while the air path of machine B is open. The switching knob 4 can switch the gas flow route with one click, enabling dual-machine diving and extending the diving time. At the same time, when one machine fails, it can be switched to the other machine to continue diving, which further improves the development of long-term underwater operations. Meanwhile, the supply of a single air source ensures the simplicity and stability of operation.

[0027] like Figure 5 andFigure 6 As shown, the switching knob 4 comprises a knob block 41, one end of the knob block 41 is sleeved with a sun-shaped fitting 43, and one end of the knob block 41 is fixed with a connecting shaft 44 penetrating through the sun-shaped fitting 43, one end of the connecting shaft 44 is rotationally connected with the side wall of the module main shell 1, the other end of the sun-shaped fitting 43 is located inside the slot hole 52, and the sun-shaped fitting 43 located inside the slot hole 52 is rotationally connected with the switching rod 5 through a hexagonal screw 53, so that the switching knob 4 and the switching rod 5 are integrated, and the switching rod 5 is conveniently moved in the module main shell 1 by the switching knob 4.

[0028] The knob block 41 is provided with a limiting protrusion 42 close to one side of the module main shell 1, the module main shell 1 is provided with a mounting hole for mounting the knob block 41, and the inner wall of the mounting hole is provided with a clamping groove for limiting the limiting protrusion 42. When the switching knob 4 is rotated, the switching knob 4 is limited by the clamping groove when it is rotated to a certain angle due to the clamping groove inside the module main shell 1. When the switching knob 4 is rotated, the hexagonal screw 53 is moved horizontally, thereby driving the switching rod 5 to move horizontally, so as to switch the air outlet assembly 2.

[0029] As shown in Figure 2 and Figure 7 The sequence needle valve 3 comprises a needle valve shell, a needle valve inner core 32 is threadedly connected inside the needle valve shell, the needle head of the needle valve inner core 32 is provided in a micro-tapered manner, a tapered groove corresponding to the needle head is provided on the needle valve shell, a gear plate 35 is fixedly sleeved at one end of the needle valve inner core 32, and a third sealing ring 36 is arranged at the connection between the needle valve inner core 32 and the gear plate 35 to increase the sealing property between the gear plate 35 and the needle valve shell, a plurality of holes are formed in the gear plate 35, each hole corresponds to a gear position of the sequence needle valve 3, a knob cover 31 is arranged at one end of the needle valve shell, an elastic bullet head is arranged in the knob cover 31 for plugging one of the holes to adjust the gear position, and a blind hole 33 is formed in one side of the knob cover 31 relative to the gear plate 35 for mounting the elastic bullet head. There are twelve holes, which correspond to the initial gear position and the first, second, …, eleventh gear positions of the sequence needle valve 3, respectively. The elastic bullet head is composed of a bullet head and a spring, one end of the spring is embeddedly fixed inside the blind hole 33, the planar end of the bullet head is fixed at the other end of the spring, and the arc-shaped end of the bullet head is located inside one of the holes, which is the initial gear position of the sequence needle valve 3.

[0030] The outer wall of the gear plate 35 is provided with an external threaded section, the inside of the needle valve shell is provided with an internal thread for screwing the gear plate 35, one end of the needle valve inner core 32 is provided with a hexagonal bolt passing through the center thread of the gear plate 35, the knob cover 31 is provided with an internal hexagonal groove 34 on one side of the blind hole 33 for inserting the hexagonal bolt, gently rotate the knob cover 31 counterclockwise, when the feeling of being buckled is felt, that is, the bullet inside the knob cover 31 moves to the next hole position of the gear plate 35, at this time the needle valve becomes the first gear state, the sequence needle valve 3 changes from the initial gear state to the first gear state, the internal hexagonal groove 34 in the knob cover drives the needle valve inner core 32 to rotate counterclockwise, since the needle valve inner core 32 is connected with the needle valve shell through threads, so that the needle valve inner core 32 moves to the left, the gap between the conical head of the needle valve inner core 32 and the internal conical groove of the needle valve shell increases, and the gas flow also increases.

[0031] As in the first gear state, the gas flow is 0.4L / min, which is increased by 0.2L / min compared with the initial state, and the gas flow is sequentially increased by 0.2L / min for each gear, and so on, until the maximum eleventh gear state, the gas flow is 2.6L / min.

[0032] Therefore, the sequence needle valve 3 has eleven gears in the case of default medium pressure of 13bar in the external gas cylinder, initial state gas flow of 0.2L / min, each gear can sequentially increase the gas flow by 0.2L / min, and the maximum gas flow can reach 2.6L / min.

[0033] As shown in Figure 8 The gas adding valve 6 includes an adding valve core body 62 and a round cover 61 installed at one end of the adding valve core body 62, and a reset spring is arranged between the round cover 61 and the adding valve core body 62, the round cover 61 is pressed to be pushed out by the force of the reset spring together with the adding valve core body 62, the adding valve core body 62 is assembled in the inside of the module main shell 1 through threads, the adding valve core body 62 has two second holes up and down, the gas inlet gas enters the inside of the adding valve core body 62 through the second holes, and the adding valve core body 62 is provided with fourth sealing rings on the left and right sides to prevent gas leakage when the gas inlet gas enters.

[0034] After the gas flows to the outside of the gas adding valve 6, the gas in the gas supply module enters the B machine through the gas outlet assembly 2 for human respiration, if the gas flow of the sequence needle valve 3 is insufficient or the oxygen demand increases in the case of physical labor, the round cover 61 outside the gas adding valve 6 can be pressed to supply instant high-flow oxygen as needed.

[0035] The gas outlet assembly 2 and the gas inlet assembly 7 each comprise a connecting head 21 and a gas check valve 22 sealingly installed at one end of the connecting head 21, the other end of the gas check valve 22 is sealingly connected with the side wall of the module main shell 1, the connecting head 21 and the gas check valve 22 are connected through screw threads, and a first sealing ring 23 is arranged at the connecting position of the connecting head 21 and the gas check valve 22, the sealing property between the connecting head 21 and the gas check valve 22 is ensured by the first sealing ring 23, the gas check valve 22 and the module main shell 1 are connected through screw threads, and a second sealing ring 24 is arranged at the connecting position of the gas check valve 22 and the module main shell 1, the sealing property between the gas check valve 22 and the module main shell 1 is increased by the second sealing ring 24, the connecting head 21 on the gas outlet assembly 2 is used for connecting a machine for providing oxygen to a diver and processing exhaled gas, and the connecting head 21 on the gas inlet assembly 7 is used for connecting a gas cylinder to provide a gas source for the machine.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual circuit rebreather gas supply module, characterized by: The utility model provides a module main shell (1) is connected with two groups of gas check function's gas outlet assembly (2) in the upper end, the inside installation of module main shell (1) is used for switching the switching rod (5) of gas outlet assembly (2) passage, switching rod (5) is adjusted through switching knob (4), switching knob (4) is installed in the lateral wall of module main shell (1), the lower end of module main shell (1) is provided with the gas inlet assembly (7) with gas check function, the inside sealed communication of opposite two sides of module main shell (1) has sequence needle valve (3) and gas addition valve (6), and the regulation of sequence needle valve (3) different gear can realize the sequence type steady increment of pure oxygen gas flow.

2. The dual-circuit rebreather gas supply module of claim 1, wherein: The outer wall of the switching rod (5) is provided with two ring grooves corresponding to the two gas outlet assemblies (2), each ring groove is composed of a plurality of equidistantly arranged first ring grooves (51), and a fifth sealing ring is arranged at each first ring groove (51). When one of the ring grooves is aligned with one of the gas outlet assemblies (2), the other ring groove is not aligned with the other gas outlet assembly (2). A slot hole (52) connected with the switching knob (4) is arranged on the switching rod (5) between the two ring grooves.

3. The dual-circuit rebreather gas supply module of claim 2, wherein: The switching knob (4) comprises a knob block (41), one end of the knob block (41) is sleeved with a sun-shaped fitting (43), one end of the knob block (41) is fixed with a connecting shaft (44) penetrating through the sun-shaped fitting (43), one end of the connecting shaft (44) is rotationally connected with the lateral wall of the module main shell (1), the other end of the sun-shaped fitting (43) is located in the slot hole (52), and the sun-shaped fitting (43) in the slot hole (52) is rotationally connected with the switching rod (5) through a hexagonal screw (53).

4. The dual-circuit rebreather gas supply module of claim 3, wherein: A limiting protrusion (42) is arranged on one side of the knob block (41) close to the module main shell (1), the module main shell (1) is provided with a mounting hole for mounting the knob block (41), and the inner wall of the mounting hole is provided with a clamping groove for limiting the limiting protrusion (42).

5. The dual-circuit rebreather gas supply module of claim 4, wherein: The sequence needle valve (3) comprises a needle valve shell, a needle valve inner core (32) is threadedly connected in the needle valve shell, the needle head of the needle valve inner core (32) is arranged in a micro-tapered manner, a tapered groove corresponding to the needle head is arranged on the needle valve shell, a gear plate (35) is fixedly sleeved at one end of the needle valve inner core (32), a plurality of holes are formed in the gear plate (35), a knob cover (31) is arranged at one end of the needle valve shell, an elastic bullet is arranged in the knob cover (31) for plugging one of the holes to adjust the gear, and a blind hole (33) for mounting the elastic bullet is formed in one side of the knob cover (31) relative to the gear plate (35).

6. The dual-circuit rebreather gas supply module of claim 5, wherein: An external thread section is arranged on the outer wall of the gear plate (35), an internal thread for screwing the gear plate (35) is arranged in the needle valve shell, a hexagonal bolt is arranged at one end of the needle valve inner core (32) penetrating through the central thread of the gear plate (35), and an internal hexagonal groove (34) for inserting the hexagonal bolt is formed in one side of the knob cover (31) relative to the blind hole (33).

7. The dual-circuit rebreather gas supply module of claim 6, wherein: The gas outlet assembly (2) and the gas inlet assembly (7) each comprise a connecting head (21) and a gas check valve (22) sealingly installed at one end of the connecting head (21), and the other end of the gas check valve (22) is sealingly connected with the side wall of the module main shell (1).

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