Double-flow adjusting pressure reducing valve of compressed oxygen self-rescuer

Abstract

The utility model provides a double-flow adjusting pressure reducing valve of a compressed oxygen self-rescuer, and belongs to the technical field of compressed oxygen self-rescuers. The technical problem that an existing pressure reducing valve cannot adjust the flow is solved. A pressure reducing valve body comprises an air inlet mounting part and an adjusting mounting part, an air inlet base is fixedly connected to the outer end of the air inlet mounting part, a pressure reducing piston and a pressure reducing spring are arranged between the air inlet base and the air inlet mounting part, and an air inlet flow channel is formed between the air inlet base and the pressure reducing piston; a first adjusting mounting cavity and a second adjusting mounting cavity are formed in the adjusting mounting part, the air inlet flow channel, the first adjusting mounting cavity and the second adjusting mounting cavity are communicated, an air outlet nozzle is detachably and fixedly connected into the first adjusting mounting cavity, a first quantitative hole is formed in the air outlet nozzle, and an adjusting switch is adjustably arranged in the second adjusting mounting cavity; the adjusting switch is provided with a second quantitative hole, and the first quantitative hole is larger than the second quantitative hole. The double-flow regulating valve has a double-flow regulating mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressed oxygen self-rescuers, in particular to a double-flow regulating pressure reducing valve for compressed oxygen self-rescuers. Background Art

[0002] A compressed oxygen self-rescuer is a small oxygen respirator that draws its oxygen from a high-pressure oxygen cylinder. It boasts advantages such as small size, light weight, portability, comfort, ease of operation, and reusability. However, the pressure-reducing valves in currently available compressed oxygen self-rescuers typically provide a fixed flow rate. This prevents users from adjusting the flow rate during exercise or rest, resulting in either insufficient oxygen concentration or excessive oxygen waste. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a dual-flow regulating pressure reducing valve for a compressed oxygen self-rescuer. The technical problem to be solved by the present invention is how to enable the pressure reducing valve to have a dual-flow regulating mode.

[0004] The purpose of this utility model can be achieved through the following technical solutions:

[0005] A dual-flow regulating pressure-reducing valve for a compressed oxygen self-rescuer comprises a pressure-reducing valve body, the pressure-reducing valve body comprises an air intake mounting portion and an adjusting mounting portion, the outer end of the air intake mounting portion is fixedly connected to an air intake base, a pressure-reducing piston and a pressure-reducing spring are provided between the air intake base and the air intake mounting portion, an air intake flow channel is provided between the air intake base and the pressure-reducing piston, a first regulating mounting cavity and a second regulating mounting cavity are provided in the regulating mounting portion, the first regulating mounting cavity and the second regulating mounting cavity are connected by a connecting hole, an air outlet nozzle is detachably and fixedly connected in the first regulating mounting cavity, a first quantitative hole is provided on the air outlet nozzle, an regulating switch is adjustably provided in the second regulating mounting cavity, a second quantitative hole is provided on the regulating switch, and the first quantitative hole is larger than the second quantitative hole.

[0006] Furthermore, the regulating switch includes a handle portion, a fixing portion and a sealing portion, the sealing portion is provided with an air inlet hole connected to the second regulating mounting cavity, the sealing portion is fixedly connected to one end of the sealing portion close to the connecting hole, a second quantitative plate is axially fixed between the sealing gasket and the sealing portion, the second quantitative hole is located on the second quantitative plate and is connected to the air inlet hole, a locking sleeve is provided on the outer sleeve of the fixing portion, the outer periphery of the locking sleeve is threadedly fixed to the inner wall of the second regulating mounting cavity, and the air inlet hole is located between the fixing portion and the second quantitative plate.

[0007] Furthermore, an annular boss protruding toward the second adjustable mounting cavity connects the first and second adjustable mounting cavities. A connecting hole is provided within the annular boss, connecting the first and second adjustable mounting cavities. The sealing gasket can be moved toward or away from the annular boss by adjusting the switch. A sealing ring block protrudes inwardly from the inner wall of the second adjustable mounting cavity. The locking sleeve is sealed and secured to the sealing ring block. A sealing member is provided between the sealing portion and the locking sleeve.

[0008] Furthermore, the pressure reducing valve body also includes an air storage portion, which is located between the air inlet mounting portion and the adjustment mounting portion. An air storage cavity is provided in the air storage portion, and the air storage cavity is always connected to the second adjustment mounting cavity.

[0009] Furthermore, an annular fixing block protrudes inwardly between the air inlet mounting portion and the air storage portion, and the decompression piston rests on the annular fixing block via a decompression spring.

[0010] Furthermore, the connecting hole is bent at 90 degrees, the air outlet nozzle is located at the lower part of the pressure reducing valve body, the axis of the air outlet nozzle is perpendicular to the axis of the regulating switch, the air outlet nozzle includes a first quantitative plate, and the first quantitative hole is located on the first quantitative plate.

[0011] Furthermore, the pressure reducing valve body is located at one end of the air outlet nozzle and is also provided with a hand-filled air outlet cavity that is always connected to the second adjustment mounting cavity. The hand-filled air outlet cavity is provided with a hand-filled air outlet hole. The opening directions of the first quantitative hole and the hand-filled air outlet hole are consistent. A reset spring and a hand-filled rod are provided in the hand-filled air outlet cavity. One end of the hand-filled rod is fixedly connected to a hand-filled valve core. A hand-filled block is provided in the hand-filled air outlet cavity. The middle hole of the hand-filled block is the hand-filled air outlet hole. The hand-filled valve core can block or open the hand-filled air outlet hole.

[0012] Furthermore, an annular inclined groove is provided on the manual valve core, and an arc surface is provided on one end of the manual stopper close to the manual valve core. The notch of the annular inclined groove is opposite to the arc surface, and a sealing ring is provided in the annular inclined groove.

[0013] Furthermore, a safety hole is provided on the adjustment mounting portion, the safety hole is communicated with the second adjustment mounting cavity, a safety valve core and a movable lock cap are provided in the safety hole, and a pressure spring is provided between the safety valve core and the movable lock cap.

[0014] Compared with the prior art, the technical effects of the present invention are:

[0015] 1. The flow rate of the first metering hole is 2.1L / min, and the flow rate of the second metering hole is 0.7L / min. By separating the regulating switch and the metering outlet nozzle and removably fixing them in the second mounting cavity and the first mounting cavity respectively, and adjusting the axial position between the sealing gasket on the regulating switch and the regulating mounting portion, it is possible to achieve: 1. The first metering flow rate: the inlet flow channel, the air storage chamber, the second regulating mounting cavity, and the first metering hole are connected in sequence; 2. The second metering flow rate: the inlet flow channel, the air storage chamber, the second regulating mounting cavity, the second metering hole, and the first metering hole are connected in sequence, giving the pressure reducing valve a dual flow adjustment mode.

[0016] Second, compared to the prior art, in which the oxygen in the high-pressure oxygen cylinder is directly decompressed on the pressure-reducing piston and then flows to the airbag fixed to the outside of the pressure-reducing valve, since the oxygen in the high-pressure oxygen cylinder has a high pressure at the beginning and gradually decreases later, this causes the oxygen flow through the pressure-reducing piston to fluctuate with the pressure in the high-pressure oxygen cylinder, and the amount of oxygen entering the airbag fluctuates, making it difficult to stabilize the oxygen flow. In contrast, the present pressure-reducing valve is equipped with an air storage portion on the pressure-reducing valve body, in which a relatively large air storage chamber can be set. The air storage chamber receives, stores, and buffers the oxygen flowing from the pressure-reducing piston. The oxygen in the air storage chamber has a stable pressure, and the oxygen can be adjusted to a certain flow rate for a long time through an adjustment switch. This improves the stability of the operation and ensures the safety of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This utility model is a cross-sectional view Figure 1 .

[0018] Figure 2 This utility model is a cross-sectional view Figure 2 .

[0019] Figure 3 It is an enlarged view of point A of the present utility model.

[0020] Figure 4 It is an enlarged view of point B of the present utility model.

[0021] Figure 5 It is an enlarged view of point C of the present utility model.

[0022] Figure 6 It is a cross-sectional view of the safety valve of the utility model.

[0023] Figure number mark: 1. Pressure reducing valve body; 101. Air inlet mounting portion; 102. Adjustment mounting portion; 1021. First adjustment mounting cavity; 1022. Second adjustment mounting cavity; 1023. Annular boss; 1024. Connecting hole; 1025. Sealing ring block; 1026. Safety hole; 1027. Manual air outlet cavity; 1028. Manual air outlet hole; 1029. Manual air stop block; 103. Air storage portion; 1031. Air storage cavity; 104. Annular fixing block; 2. Air inlet base; 3. Pressure reducing piston; 4. Pressure reducing spring; 5. , inlet flow channel; 6, air outlet nozzle; 601, first metering plate; 602, first metering hole; 7, regulating switch; 701, handle part; 702, fixing part; 703, sealing part; 704, air inlet hole; 705, sealing gasket; 706, second metering plate; 707, second metering hole; 8, sealing element; 9, locking sleeve; 10, reset spring; 11, manual make-up rod; 12, manual make-up valve core; 1201, annular inclined groove; 13, sealing ring; 14, safety valve core; 15, pressure spring; 16, movable locking cap. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] according to Figures 1 to 6As shown, a dual-flow regulating pressure reducing valve for a compressed oxygen self-rescuer includes a pressure reducing valve body 1, the pressure reducing valve body 1 includes an air intake mounting part 101 and an adjusting mounting part 102, the outer end of the air intake mounting part 101 is fixedly connected to an air intake base 2, a pressure reducing piston 3 and a pressure reducing spring 4 are arranged between the air intake base 2 and the air intake mounting part 101, an air intake flow channel 5 is arranged between the air intake base 2 and the pressure reducing piston 3, a first adjusting mounting cavity 1021 and a second adjusting mounting cavity 1022 are arranged in the adjusting mounting part 102, the first adjusting mounting cavity 1021 and the second adjusting mounting are connected by a connecting hole 1024, the air intake flow channel 5, the first adjusting mounting cavity 1021 and the second adjusting mounting cavity 1022 are connected, an air outlet nozzle 6 is detachably fixedly connected in the first adjusting mounting cavity 1021, a first quantitative hole 602 is arranged on the air outlet nozzle 6, an adjusting switch 7 is adjustably arranged in the second adjusting mounting cavity 1022, a second quantitative hole 707 is arranged on the adjusting switch 7, and the first quantitative hole 602 is larger than the second quantitative hole 707. A safety hole is provided on the adjustment mounting portion. The safety hole 1026 is connected to the second adjustment mounting cavity 1022. A safety valve core 14 and a movable lock cap 16 are provided in the safety hole 1026. A pressure spring 15 is provided between the safety valve core 14 and the movable lock cap 16.

[0027] The regulating switch 7 includes a handle portion 701, a fixing portion 702 and a sealing portion 703. The sealing portion 703 is provided with an air inlet hole 704 connected to the second regulating mounting cavity 1022. A sealing gasket 705 is fixedly connected to one end of the sealing portion 703 close to the connecting hole 1024. A second quantitative plate 706 is axially fixed between the sealing gasket 705 and the sealing portion 703. The second quantitative hole 707 is located on the second quantitative plate 706 and is connected to the air inlet hole 704. A locking sleeve 9 is provided on the outer sleeve of the fixing portion 702. The outer periphery of the locking sleeve 9 is threadedly fixed to the inner wall of the second regulating mounting cavity 1022. The air inlet hole 704 is located between the fixing portion 702 and the second quantitative plate 706. An annular boss 1023 protruding toward the second adjustment mounting cavity 1022 connects the first adjustment mounting cavity 1021 and the second adjustment mounting cavity 1022. A connecting hole 1024 is provided within the annular boss 1023. The sealing gasket 705 can be moved toward or away from the annular boss 1023 by adjusting the switch 7. A sealing ring block 1025 protrudes inward from the inner wall of the second adjustment mounting cavity 1022. The locking sleeve 9 is sealed and fixed to the sealing ring block 1025. A sealing member 8 is provided between the sealing portion 703 and the locking sleeve 9.

[0028] The air outlet nozzle 6 is threadedly fixed to the inner wall of the first mounting cavity. The air outlet nozzle 6 includes a first quantitative plate 601 , which is axially fixed between the air outlet nozzle 6 and the adjustment mounting portion 102 . The first quantitative hole 602 is located on the first quantitative plate 601 .

[0029] The pressure reducing valve body 1 also includes an air storage portion 103, which is located between the air inlet mounting portion 101 and the regulating mounting portion 102. An air storage chamber 1031 is provided in the air storage portion 103. The air inlet flow channel 5, the air storage chamber 1031, the second regulating mounting chamber 1022, and the first metering hole 602 are sequentially connected. The air inlet flow channel 5, the air storage chamber 1031, the second regulating mounting chamber 1022, the second metering hole 707, and the first metering hole 602 are sequentially connected. An annular fixing block 104 protrudes inward between the air inlet mounting portion 101 and the air storage portion 103, and the pressure reducing piston 3 rests on the annular fixing block 104 via the pressure reducing spring 4.

[0030] The connecting hole is bent at 90 degrees, and the air outlet nozzle 6 is located at the lower part of the pressure reducing valve body. The axis of the air outlet nozzle 6 is perpendicular to the axis of the regulating switch 7. The air outlet nozzle 6 includes a first quantitative plate, and the first quantitative hole is located on the first quantitative plate. The pressure reducing valve body is also provided with a hand-filled air outlet cavity 1027 at one end of the air outlet nozzle, which is always connected to the second regulating installation cavity. The hand-filled air outlet cavity 1027 is provided with a hand-filled air outlet hole 1028. The opening directions of the first quantitative hole 602 and the hand-filled air outlet hole 1028 are consistent. A reset spring 10 and a hand-filled rod 11 are provided in the hand-filled air outlet cavity 1027. One end of the hand-filled rod 11 is fixedly connected to a hand-filled valve core 12. A hand-filled block 1029 is provided in the hand-filled air outlet cavity. The middle hole of the hand-filled block 1029 is the hand-filled air outlet hole 1028. The hand-filled valve core 12 can block or open the hand-filled air outlet hole 1028. An annular inclined groove 1201 is provided on the manual valve core 12, and an arc surface is provided on one end of the manual valve core 12 of the manual stopper 1029, the notch of the annular inclined groove 1201 is opposite to the arc surface, and a sealing ring 13 is provided in the annular inclined groove 1201.

[0031] like Figure 1 As shown, the flow rate is opened at 2.1 L / min, and the sealing gasket 705 is moved away from the annular boss 1023 through the adjustment switch 7. At this time, the intake flow channel 5, the air storage chamber 1031, the second adjustment installation chamber 1022 and the first quantitative hole 602 are connected in sequence to form the first quantitative flow rate.

[0032] like Figure 2 As shown, the flow rate is opened at 0.7 L / min, and the sealing gasket 705 abuts against the annular boss 1023 through the adjustment switch 7. At this time, the intake flow channel 5, the air storage chamber 1031, the second adjustment installation chamber 1022, the second quantitative hole 707 and the first quantitative hole 602 are connected in sequence to form a second quantitative flow rate.

[0033] In this pressure reducing valve, an air storage portion 103 is added to the pressure reducing valve body 1, and a relatively large air storage chamber 1031 can be set in the air storage portion 103. The air storage chamber 1031 receives, stores and buffers the oxygen flowing from the pressure reducing piston 3. The oxygen in the air storage chamber 1031 has a stable pressure, and the oxygen can be stably adjusted to a quantitative output of a certain flow rate for a long time by adjusting the switch 7, thereby improving the stability of the work and ensuring the safety of the user.

[0034] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection defined by the claims of the present invention.

Claims

1. A dual-flow regulating pressure reducing valve for a compressed oxygen self-rescuer, comprising a pressure reducing valve body (1), characterized in that: The pressure reducing valve body (1) comprises an air intake mounting portion (101) and an adjusting mounting portion (102); the outer end of the air intake mounting portion (101) is fixedly connected to an air intake base (2); a pressure reducing piston (3) and a pressure reducing spring (4) are provided between the air intake base (2) and the air intake mounting portion (101); an air intake flow channel (5) is provided between the air intake base (2) and the pressure reducing piston (3); a first adjusting mounting cavity (1021) and a second adjusting mounting cavity (1022) are provided in the adjusting mounting portion (102); 22), the first adjustment installation cavity (1021) and the second adjustment installation cavity are connected by a connecting hole (1024), an air outlet nozzle (6) is detachably fixedly connected in the first adjustment installation cavity (1021), and a first quantitative hole (602) is provided on the air outlet nozzle (6), and an adjustment switch (7) is adjustably provided in the second adjustment installation cavity (1022), and a second quantitative hole (707) is provided on the adjustment switch (7), and the first quantitative hole (602) is larger than the second quantitative hole (707).

2. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 1, characterized in that: The regulating switch (7) comprises a handle portion (701), a fixing portion (702) and a sealing portion (703); an air inlet (704) communicating with the second regulating installation cavity (1022) is provided on the sealing portion (703); a sealing gasket (705) is fixedly connected to one end of the sealing portion (703) close to the connecting hole (1024); a second quantitative plate (706) is axially fixed between the sealing gasket (705) and the sealing portion (703); the second quantitative hole (707) is located on the second quantitative plate (706) and is communicated with the air inlet (704); a locking sleeve (9) is provided on the outer sleeve of the fixing portion (702); the outer periphery of the locking sleeve (9) is threadedly fixed to the inner wall of the second regulating installation cavity (1022); and the air inlet (704) is located between the fixing portion (702) and the second quantitative plate (706).

3. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 2, characterized in that: An annular boss (1023) protruding toward the second adjusting mounting cavity (1022) is connected between the first adjusting mounting cavity (1021) and the second adjusting mounting cavity (1022); a connecting hole (1024) is provided in the annular boss (1023); and the sealing gasket (705) can abut against or move away from the annular boss (1023) through the adjustment switch (7).

4. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 3, characterized in that: The pressure reducing valve body (1) further comprises an air storage portion (103), wherein the air storage portion (103) is located between the air inlet mounting portion (101) and the regulating mounting portion (102), and an air storage cavity (1031) is provided in the air storage portion (103), and the air storage cavity (1031) is always connected to the second regulating mounting cavity (1022).

5. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 4, characterized in that: An annular fixing block (104) protrudes inwardly between the air inlet mounting portion (101) and the air storage portion (103), and the decompression piston (3) abuts against the annular fixing block (104) via a decompression spring (4).

6. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 1, characterized in that: The connecting hole (1024) is bent at 90 degrees, the air outlet nozzle (6) is located at the lower part of the pressure reducing valve body (1), the axis of the air outlet nozzle (6) is perpendicular to the axis of the regulating switch (7), the air outlet nozzle (6) includes a first quantitative plate (601), and the first quantitative hole (602) is located on the first quantitative plate (601).

7. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 6, characterized in that: The pressure reducing valve body (1) is further provided with a hand-made air outlet cavity (1027) which is always connected to the second regulating installation cavity (1022) at one end of the air outlet nozzle (6). A hand-made air outlet hole (1028) is provided on the hand-made air outlet cavity (1027). The opening directions of the first quantitative hole and the hand-made air outlet hole (1028) are consistent. A return spring (10) and a hand-made rod (11) are provided in the hand-made air outlet cavity (1027). One end of the hand-made rod (11) is fixedly connected to a hand-made valve core (12). A hand-made block (1029) is provided in the hand-made air outlet cavity (1027). The middle hole of the hand-made block (1029) is the hand-made air outlet hole (1028). The hand-made valve core (12) can block or open the hand-made air outlet hole (1028).

8. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 7, characterized in that: An annular inclined groove (1201) is provided on the manual valve core (12); an arc surface is provided on one end of the manual valve core (12) close to the manual valve core (12); the notch of the annular inclined groove (1201) is opposite to the arc surface; and a sealing ring (13) is provided in the annular inclined groove (1201).

9. A dual flow regulating pressure reducing valve for a compressed oxygen self-rescuer according to claim 1, characterized in that: The adjustment mounting portion (102) is further provided with a safety hole (1026), the safety hole (1026) is communicated with the second adjustment mounting cavity (1022), a safety valve core (14) and a movable lock cap (16) are provided in the safety hole (1026), and a pressure spring (15) is provided between the safety valve core (14) and the movable lock cap (16).

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