Switch pressure reducer of isolated compressed oxygen self-rescuer

Abstract

The invention provides a switch pressure reducer of an isolated compressed oxygen self-rescuer, and belongs to the technical field of compressed oxygen self-rescuers. The technical problems that an existing pressure reducer is unstable in oxygen supply pressure, unstable in flow and the like are solved. A switch pressure reducer of an isolation type compressed oxygen self-rescuer comprises a valve body, a base and a pressure reducing piston, the valve body comprises an air inlet mounting part, an air storage part and an adjusting mounting part, a piston cavity is formed in the air inlet mounting part, an air storage cavity is formed in the air storage part, an annular flange is arranged between the piston cavity and the air storage cavity, and the base and the air inlet mounting part are fixed through a fastener. One end of the pressure reduction piston extends into the base, the other end of the pressure reduction piston extends into the air inlet mounting part and abuts against the annular flange, the base and the pressure reduction piston are provided with air inlet flow channels communicated with the air storage cavity, the adjusting mounting part is provided with an adjusting assembly, and the adjusting assembly is provided with an air outlet flow channel communicated with the air storage cavity. According to the oxygen supply device, oxygen can be stably, adjustably and quantitatively output for a long time, the working stability is improved, and the safety of a user is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of compressed oxygen self-rescuers, and in particular relates to a switch pressure reducer of an isolated compressed oxygen self-rescuer. Background Art

[0002] The isolated compressed oxygen self-rescuer stores high-purity oxygen in a compressed oxygen bottle and adjusts the oxygen pressure to a range suitable for human breathing through a pressure reducer. When a person needs to breathe oxygen, he only needs to put on the mask and turn on the oxygen switch, and the oxygen will flow out of the compressed oxygen bottle and enter the human respiratory system.

[0003] As a device for controlling the flow of oxygen, the pressure reducer plays an important role in the isolated compressed oxygen self-rescuer. The prior art discloses a pressure reducing valve for a compressed oxygen self-rescuer, including a valve body, on which an air hole connected to the inside of the valve body is provided, and a flow control valve core is provided in the air hole. The flow control valve core is used to control the gas flow in the air hole. The air hole is set to a conical structure with a small diameter at one end and a large diameter at the other end. The small diameter end is located inside the valve body, and the large diameter end is located on the surface of the valve body. The main purpose of the above structure is to be able to push the flow control valve core (gravity ball) to the corresponding position under the action of the pressure difference between the inside and outside of the valve body, so as to control the flow of oxygen and realize quantitative oxygen supply. Due to the unstable pressure in the valve body, the flow control valve core cannot always be in a relatively stable position, which will cause the gas flow to be large and small at times, and fail to meet the standard of quantitative oxygen supply.

[0004] In order to make the gas flow more standardized, a switch pressure reducing valve is disclosed in the prior art, which has a quantitative hole on the outer surface of the upper shell to realize quantitative oxygen supply through the quantitative hole. However, this structure has only one flow adjustment, and long-term high-flow oxygen supply will cause the pressure inside the valve to be unstable, resulting in unstable flow from the quantitative hole. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a switch pressure reducer for an isolated compressed oxygen self-rescuer. The technical problem to be solved by the present invention is how to make the switch pressure reducer maintain a stable pressure when supplying oxygen at a large flow rate for a long time, so that it can stably and adjustably output a quantitative amount of oxygen.

[0006] The objectives of the present invention can be achieved through the following technical solutions: a switch pressure reducer of an isolated compressed oxygen self-rescuer, comprising a valve body, a base and a pressure reducing piston, the valve body comprising an air intake mounting part, an air storage part and an adjusting mounting part, the air intake mounting part has a piston cavity, the air storage part has an air storage cavity, an annular flange is provided between the piston cavity and the air storage cavity, the base and the air intake mounting part are fixed by fasteners, one end of the pressure reducing piston extends into the base and the other end extends into the air intake mounting part and abuts against the annular flange, the base and the pressure reducing piston are provided with an inlet flow channel connected to the air storage cavity, the adjusting mounting part is provided with an adjusting component, and the adjusting component is provided with an outlet flow channel connected to the air storage cavity.

[0007] Compared with the prior art, in which the oxygen in the compressed oxygen bottle is directly decompressed from the decompression piston and then flows to the air bag fixed to the outside of the switch pressure reducer, since the oxygen in the compressed oxygen bottle has a relatively high pressure at the beginning and gradually decreases later, this will cause the oxygen flow through the decompression piston to fluctuate with the pressure in the compressed oxygen bottle, and the amount of oxygen entering the air bag is sometimes large and sometimes small, making it difficult to stabilize the oxygen supply flow. In this switch pressure reducer, an air storage part is added to the valve body, and a relatively large air storage chamber can be set in the air storage part. The air storage chamber receives, stores and buffers the oxygen flowing from the decompression 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 the adjustment component. The quantitative output, thereby improving the stability of the work and ensuring the safety of the user.

[0008] Furthermore, the adjustment component includes a separately arranged quantitative air outlet nozzle and an adjustment switch, and the adjustment mounting portion is provided with an installation cavity one and an installation cavity two, and the installation cavity one and the installation cavity two are connected through a connecting hole. The quantitative air outlet nozzle is detachably fixedly connected in the installation cavity one, and the quantitative air outlet nozzle is provided with a first quantitative hole. The adjustment switch is adjustably fixed in the installation cavity two, and a second quantitative hole is provided in the adjustment switch. The adjustment switch can adjust to open the first quantitative hole and / or the second quantitative hole.

[0009] The regulating component has two first quantitative holes and second quantitative holes of different sizes. The flow rate of the first quantitative hole is 2.1L / min, and the flow rate of the second quantitative hole is 0.7L / min. By setting the regulating switch and the quantitative air outlet nozzle in the regulating component separately and detachably fixing them in the installation cavity 2 and the installation cavity 1 respectively, that is to say, the quantitative air outlet nozzle and the regulating switch are both directly and separately fixedly connected to the valve body, and the outside of the quantitative air outlet nozzle needs to be fixedly connected to the air bag. The regulating switch is set outside the air bag and locked on the valve body. The user can easily find the regulating switch and turn it on in a dark environment. The air bag and the quantitative air outlet nozzle are fixed, and will not affect the independent work of the regulating switch during use. The two can jointly complete the flow rate adjustment through the valve body while stably outputting the oxygen in the air storage cavity.

[0010] Furthermore, the gas storage chamber, the second mounting chamber, the connecting hole and the first quantitative hole are connected in sequence after the end of the regulating switch is away from the connecting hole, or the gas storage chamber, the second mounting chamber, the second quantitative hole, the connecting hole and the first quantitative hole are connected in sequence after the regulating switch is tightly against the connecting hole. At the end of the regulating switch away from the connecting hole, the gas storage chamber, the second mounting chamber, the connecting hole and the first quantitative hole are connected in sequence to form an outlet flow channel with a flow rate of 2.1L / min. When the regulating switch is tightly against one end of the connecting hole, the oxygen in the gas storage chamber flows out from the second mounting chamber, the vent hole, the second quantitative hole, the connecting hole and the first quantitative hole to form an outlet flow channel with a flow rate of 0.7L / min. The connecting hole can be a straight-through or a 90-degree curved passage.

[0011] Furthermore, a sealing gasket is fixedly provided at one end of the regulating switch close to the connecting hole, a vent hole is provided on the regulating switch, a second quantitative plate is fixedly provided between the sealing gasket and the vent hole, and the second quantitative hole is located on the second quantitative plate.

[0012] Furthermore, the quantitative air outlet nozzle also includes a first quantitative plate, the first quantitative hole is located on the first quantitative plate, and the quantitative air outlet nozzle is threadedly fixed to an inner wall of the installation cavity.

[0013] Furthermore, the adjustment mounting portion is provided with a safety hole, the safety hole is connected to the 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. The design of the movable lock cap facilitates the adjustment of the position of the quantitative switch, so that the quantitative switch position of each product is in a unified position.

[0014] Furthermore, a hand-filled air outlet cavity which is always connected to the second installation cavity is provided at the lower part of the adjustment installation part, a hand-filled air outlet hole is provided on the hand-filled air outlet cavity, and the opening directions of the first quantitative hole and the hand-filled air outlet hole are consistent.

[0015] Furthermore, a return spring and a hand-patch rod are provided in the hand-patch air outlet cavity, one end of the hand-patch rod is fixedly connected to a hand-patch valve core, a hand-patch block is provided in the hand-patch air outlet cavity, the middle hole of the hand-patch block is the hand-patch air outlet, and the hand-patch valve core can block or open the hand-patch air outlet. The oxygen hand-patch can be discharged by swinging the hand-patch rod, and the cavity in the hand-patch seat is directly connected to the installation cavity 2 through the air inlet hole 2, that is, the hand-patch air outlet can bypass the adjustment component and be directly connected to the oxygen in the air storage cavity, thereby improving the safety factor. This solution is multifunctional and integrated, which saves product space and makes it easier for users to carry.

[0016] Furthermore, an air inlet hole 1 is provided on the adjusting mounting part, and the air inlet hole 1 is always connected to the mounting chamber 2 and the air storage chamber. A sealing ring block and a sealing cone block protrude from the mounting chamber 2. The adjusting switch includes a sealing section, a fixed section and a handle section which are connected in sequence. The fixed section has an external thread and is fixed to the internal thread of the mounting chamber 2. A sealing groove is provided on the sealing section between the air hole and the fixed section. A sealing member is provided in the sealing groove. The sealing member is located between the sealing ring block and the sealing section. The sealing cone block surrounds the connecting hole. The sealing gasket is embedded in the end of the sealing section and abuts against the sealing cone block. The handle section is located outside the adjusting mounting part.

[0017] Furthermore, the adjustment mounting part is provided with an air inlet hole 2 opposite to the air inlet hole 1, and the air inlet hole 2 is connected to the mounting cavity 2. The end of the adjustment mounting part away from the air inlet mounting part is fixedly connected to the hand-compensation seat, and the hand-compensation seat is provided with a reset spring and a hand-compensation rod, and the air inlet hole 2 is connected to the inner cavity of the hand-compensation seat. The hand-compensation seat is provided with a hand-compensation block, and the middle hole of the hand-compensation block is the hand-compensation air outlet. One end of the hand-compensation rod is fixedly connected to the hand-compensation valve core, and the hand-compensation valve core is provided with an annular inclined groove. The end of the hand-compensation block close to the hand-compensation valve core is provided with an arc surface, and the notch of the annular inclined groove is opposite to the arc surface, and a sealing ring is provided in the annular inclined groove. By setting the annular inclined groove opposite to the arc surface of the hand-compensation block, it is ensured that the sealing ring can quickly return to its position after the hand-compensation rod shakes and swings, and forms a sealing structure with the hand-compensation block.

[0018] Compared with the prior art, the technical effects of the present invention are as follows: 1. This scheme sets a relatively large volume of air storage chamber, which receives, stores and buffers the oxygen flowing from the pressure reducing piston. The oxygen in the air storage chamber has a stable pressure, and then the oxygen can be adjusted to a certain flow rate for a long time through the regulating component. The quantitative output, thereby improving the stability of the work and ensuring the safety of the user. Through the dual modes of manual air replenishment and automatic air replenishment and the dual flow multifunctional integrated design of 0.7L / min and 2.1L / min, the product space is saved and the user is easier to carry. 2. The quantitative air outlet nozzle and the regulating switch set by the split body are directly and separately connected to the valve body. One end of the quantitative air outlet nozzle is fixedly connected to the air bag. The regulating switch is set outside the air bag and locked on the valve body. The user can easily find the regulating switch and turn it on in a dark environment. The air bag and the quantitative air outlet nozzle are fixed, and the independent work of the regulating switch will not be affected during use. The two can complete the flow rate adjustment through the valve body and can also stably output the oxygen in the air storage chamber. 3. The safety valve core can effectively prevent the failure of the pressure reducing piston, ensure that the pressure does not exceed the critical value, and avoid damage to the user's lungs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a cross-sectional view of the first flow regulating method according to the first embodiment of the present invention.

[0020] Figure 2 It is a cross-sectional view of the second flow regulating method according to the first embodiment of the present invention.

[0021] Figure 3 It is an enlarged view of point A of the present invention.

[0022] Figure 4 It is an enlarged view of B of the present invention.

[0023] Figure 5 It is a cross-sectional view of the safety valve position of the present invention.

[0024] Figure 6 It is an enlarged view of location C of the present invention.

[0025] Figure 7 This is a cross-sectional view of embodiment 2 of the present invention. Figure 1 .

[0026] Figure 8 This is a cross-sectional view of embodiment 2 of the present invention. Figure 2 .

[0027] Fig. 9 It is an enlarged view of D of the present invention.

[0028] Figure number marking: 1. Valve body; 101. Air inlet installation part; 1011. Piston chamber; 102. Air storage part; 1021. Air storage chamber; 103. Adjustment installation part; 1031. Installation chamber 1; 1032. Installation chamber 2; 1033. Connection hole; 1034. Air inlet hole 1; 1035. Sealing ring block; 1036. Sealing cone block; 1037. Air inlet hole 2; 1038. Safety hole; 1039. Manual air outlet chamber; 104. Circular flange; 2. Base; 3. Pressure reducing piston; 4. Fastener; 5. Adjustment assembly; 501. Quantitative air outlet nozzle; 501a. First quantitative hole; 5011, first quantitative plate; 502, regulating switch; 502a, second quantitative hole; 5021, sealing gasket; 5022, vent hole; 5023, second quantitative plate; 5024, sealing section; 5025, fixing section; 5026, handle section; 5027, sealing element; 6, hand-made seat; 601, hand-made stopper; 6011, arc surface; 6012, hand-made air outlet hole; 7, reset spring; 8, hand-made rod; 801, hand-made valve core; 8011, annular inclined groove; 802, sealing ring; 9, safety valve core; 10, movable lock cap; 11, pressure spring. DETAILED DESCRIPTION

[0029] 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.

[0030] 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 relationships 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.

[0031] Embodiment 1: According to Figures 1 to 6 As shown, a switch pressure reducer of an isolated compressed oxygen self-rescuer comprises a valve body 1, a base 2 and a pressure reducing piston 3. The pressure reducing piston 3 is slidably arranged in the valve body 1 and the base 2. A pressure reducing spring is also arranged between the pressure reducing piston 3 and the base 2. One end of the base 2 away from the valve body 1 is fixedly connected to a compressed oxygen bottle. The compressed oxygen bottle contains a certain amount of compressed oxygen. The pressure reducing piston 3 and the pressure reducing spring cooperate to reduce the pressure of oxygen in the compressed oxygen bottle that enters the switch pressure reducer. The decompressed oxygen then flows to the airbag through the switch pressure reducer.

[0032] The valve body 1 includes an air intake mounting portion 101, an air storage portion 102 and an adjustment mounting portion 103 which are sequentially connected from top to bottom. The air intake mounting portion 101 has a piston cavity 1011, the air storage portion 102 has an air storage cavity 1021, and an annular flange 104 is provided between the piston cavity 1011 and the air storage cavity 1021. In the intake state, one end of the pressure reducing piston 3 extends into the base 2 and the other end extends into the air intake mounting portion 101 and abuts against the annular flange 104. In the closed state, one end of the pressure reducing piston 3 extends into the base 2 to block the air hole on the base 2. A relatively large air storage chamber 1021 can be set in the air storage part 102. The air storage chamber 1021 receives, stores and buffers the oxygen flowing from the pressure reducing piston 3. The oxygen in the air storage chamber 1021 has a stable pressure, and the oxygen can be adjusted to a quantitative output of a certain flow rate for a long time through the adjustment component 5. The buffering effect of the air storage chamber 1021 can reduce the number of opening and closing times of the pressure reducing piston 3 due to unstable pressure, thereby extending the service life of the pressure reducing piston 3, thereby improving the stability of the work and ensuring safer use by the user.

[0033] The base 2 and the air inlet mounting part 101 are fixed by fasteners 4, the lower end of the base 2 abuts against the upper end of the air inlet mounting part 101, the fasteners 4 are rotatably connected to the outer periphery of the air inlet mounting part 101, and the fasteners 4 are threadedly fastened to the outer periphery of the base 2. The base 2 and the pressure reducing piston 3 are provided with an inlet flow channel connected to the air storage chamber 1021, and oxygen enters the inlet flow channel through the filter and enters the air storage chamber 1021. The adjustment mounting part 103 is provided with an adjustment component 5, and the adjustment component 5 is provided with an outlet flow channel connected to the air storage chamber 1021. The outlet flow channel is externally connected to the airbag.

[0034] A safety hole 1038 is also provided on the adjustment installation part 103, and the safety hole 1038 is connected with the second installation cavity 1032. A safety valve core 9 and a movable lock cap 10 are provided in the safety hole 1038, and a pressure spring 11 is provided between the safety valve core 9 and the movable lock cap 10. The design of the movable lock cap 10 facilitates the adjustment of the position of the quantitative switch, so that the quantitative switch position of each product is in a unified position.

[0035] The regulating assembly 5 includes a separately arranged regulating switch 502 and a quantitative air outlet nozzle 501. The regulating mounting portion 103 is provided with a mounting cavity 1031 and a mounting cavity 2 1032. The mounting cavity 1031 and the mounting cavity 2 1032 are connected through a connecting hole 1033. The quantitative air outlet nozzle 501 is detachably fixedly connected in the mounting cavity 1031. The quantitative air outlet nozzle 501 is provided with a first quantitative hole 501a. The regulating switch 502 is adjustably fixed in the mounting cavity 2 1032. The regulating switch 502 is provided with a second quantitative hole 502a. The regulating switch 502 can adjust and open the first quantitative hole 501a and / or the second quantitative hole 502a. The regulating assembly 5 has two first quantitative holes 501a and second quantitative holes 502a of different sizes. The flow rate of the first quantitative hole 501a is 2.1L / min, and the flow rate of the second quantitative hole 502a is 0.7L / min. By separating the regulating switch 502 and the quantitative gas outlet nozzle 501 in the regulating component 5 and detachably fixing them in the second installation cavity 1032 and the first installation cavity 1031, that is to say, the quantitative gas outlet nozzle 501 and the regulating switch 502 are directly and separately fixedly connected to the valve body 1, and the outside of the quantitative gas outlet nozzle 501 needs to be fixedly connected to the air bag. The regulating switch 502 is arranged outside the air bag and locked on the valve body 1. The user can easily find the regulating switch 502 and turn it on in a dark environment. The air bag and the quantitative gas outlet nozzle 501 are fixed, and the independent work of the regulating switch 502 will not be affected during use. The two can jointly complete the flow rate adjustment through the valve body 1 and can also stably output the oxygen in the gas storage cavity 1021.

[0036] like Figure 1 As shown, the regulating switch 502 is adjusted to an outlet flow channel with a flow rate of 2.1 L / min. The regulating switch 502 is rotated so that there is a distance between it and the orifice end of the connecting hole 1033, so that the air storage chamber 1021, the second installation chamber 1032, the connecting hole 1033 and the first quantitative hole 501a are connected in sequence to form an outlet flow channel with a flow rate of 2.1 L / min.

[0037] like Figure 2As shown, the regulating switch 502 is adjusted to an outlet flow channel with a flow rate of 0.7L / min, a sealing gasket 5021 is fixedly arranged at one end of the regulating switch 502 close to the connecting hole 1033, a vent hole 5022 is arranged on the regulating switch 502, a second quantitative plate 5023 is fixedly arranged between the sealing gasket 5021 and the vent hole 5022, the second quantitative hole 502a is located on the second quantitative plate 5023, and the air storage cavity 1021, the mounting cavity 1032, the vent hole 5022, the second quantitative hole 502a, the connecting hole 1033 and the first quantitative hole 501a are connected in sequence. The sealing gasket 5021 blocks the distance between the regulating switch 502 and the end of the connecting hole 1033, so that the oxygen in the air storage chamber 1021 is connected in sequence from the mounting cavity 1032, the vent hole 5022, the second quantitative hole 502a, the connecting hole 1033 and the first quantitative hole 501a to form an outlet flow channel with a flow rate of 0.7L / min.

[0038] The air storage chamber 1021 and the second installation chamber 1032 are directly connected, and the regulating switch 502 is rotatably fixed in the second installation chamber 1032 through a locking cover seal, and the connecting hole 1033 is bent at 90 degrees, that is, the axes of the regulating switch 502 and the quantitative air outlet nozzle 501 are arranged perpendicular to each other. A hand-made air outlet chamber 1039 that is always connected to the second installation chamber 1032 is arranged at the lower part of the regulating installation part 103, and a hand-made air outlet hole 6012 is arranged on the hand-made air outlet chamber 1039, and the opening directions of the first quantitative hole 5001a and the hand-made air outlet hole 6012 are consistent. A return spring 7 and a hand-made rod 8 are arranged in the hand-made air outlet cavity 1039, one end of the hand-made rod 8 is fixedly connected to a hand-made valve core 801, a hand-made stopper 601 is arranged in the hand-made air outlet cavity 1039, the middle hole of the hand-made stopper 601 is a hand-made air outlet hole 6012, and the hand-made valve core 801 can block or open the hand-made air outlet hole 6012. An annular inclined groove 8011 is arranged on the hand-made valve core 801, and an arc surface 6011 is arranged at one end of the hand-made stopper 601 close to the hand-made valve core 801, the notch of the annular inclined groove 8011 is opposite to the arc surface 6011, and a sealing ring 802 is arranged in the annular inclined groove 8011.

[0039] Embodiment 2: According to Figures 7 to 9As shown, the difference of this embodiment lies in the positions of the adjustment switch 502, the connection hole 1033 and the quantitative air outlet nozzle 501. The connection hole 1033 is in a straight-through state, that is, the adjustment switch 502 and the quantitative air outlet nozzle 501 are arranged on the same axis. The adjustment mounting portion 103 is provided with an air inlet hole 1034, which connects the mounting cavity 2 1032 and the air storage cavity 1021. A sealing ring block 1035 and a sealing cone block 1036 protrude from the second installation cavity 1032. The regulating switch 502 includes a sealing section 5024, a fixed section 5025 and a handle section 5026 which are connected in sequence. The fixed section 5025 has an external thread and is fixed to the internal thread of the second installation cavity 1032. A sealing groove is provided on the sealing section 5024 between the vent hole 5022 and the fixed section 5025. A sealing member 5027 is provided in the sealing groove. The sealing member 5027 is located between the sealing ring block 1035 and the sealing section 5024. The sealing cone block 1036 surrounds the connecting hole 1033. The sealing gasket 5021 is embedded in the end of the sealing section 5024 and abuts against the sealing cone block 1036. The handle section 5026 is located outside the regulating mounting portion 103. This solution not only has a good sealing effect by providing a sealing ring block 1035 that seals with the sealing section 5024, but also can better guide the regulating switch 502 through the sealing ring block 1035, making the regulating switch 502 smoother. The quantitative air outlet nozzle 501 also includes a first quantitative plate 5011, and the first quantitative hole 501a is located on the first quantitative plate 5011. The quantitative air outlet nozzle 501 is threadedly fixed to the inner wall of the installation cavity 1031.

[0040] The regulating mounting part 103 is provided with a second air inlet hole 1037 opposite to the first air inlet hole 1034, and the second air inlet hole 1037 is connected to the second mounting cavity 1032. The end of the regulating mounting part 103 away from the air inlet mounting part 101 is fixedly connected to the hand-made seat 6, and the hand-made seat 6 is provided with a return spring 7 and a hand-made rod 8, and the second air inlet hole 1037 is connected to the inner cavity of the hand-made seat 6. The oxygen hand-made gas can be discharged by swinging the hand-made rod 8, and the cavity in the hand-made seat 6 is directly connected to the second mounting cavity 1032 through the second air inlet hole 1037, that is, the hand-made gas bypasses the regulating component 5 and can be directly connected to the oxygen in the gas storage cavity 1021, thereby improving the safety factor. The hand-compensation seat 6 is provided with a hand-compensation stopper 601, the middle hole of the hand-compensation stopper 601 is a hand-compensation air outlet 6012, one end of the hand-compensation rod 8 is fixedly connected with a hand-compensation valve core 801, the hand-compensation valve core 801 is provided with an annular inclined groove 8011, the hand-compensation stopper 601 is provided with an arc surface 6011 at one end close to the hand-compensation valve core 801, the notch of the annular inclined groove 8011 is opposite to the arc surface 6011, and a sealing ring 802 is provided in the annular inclined groove 8011. In this solution, by providing the annular inclined groove 8011 opposite to the arc surface 6011 of the hand-compensation stopper 601, it is ensured that the sealing ring 802 can quickly return to its position and form a sealing structure with the hand-compensation stopper 601 after the hand-compensation rod 8 shakes or swings.

[0041] The present invention fills the product gap under the new standard requirements through the dual modes of manual air replenishment and automatic air replenishment and the multifunctional integrated design of dual flow rates of 0.7L / min and 2.1L / min. Figure 4 To switch the pressure reducer to the state of the escape mode, the worker manually turns on the regulating switch 502 and adjusts the flow rate to 2.1 L / min to ensure that the oxygen concentration is sufficient when the cardiopulmonary activity increases and the oxygen demand increases during running, crawling and climbing. Figure 5 The switch pressure reducer is in rest mode. The worker manually closes the adjustment switch 502 and adjusts the flow rate to 0.7L / min. At this time, the worker finds a safe shelter and stops exercising. The cardiopulmonary oxygen demand is reduced. Adjusting the flow rate can also enable the self-rescuer to supply oxygen for a longer time, increasing the success rate of rescue.

[0042] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope 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 protection scope defined by the claims of the present invention.

Claims

1. A switch pressure reducer of an isolated compressed oxygen self-rescuer, comprising a valve body (1), a base (2) and a pressure reducing piston (3), characterized in that: The valve body (1) comprises an air intake mounting portion (101), an air storage portion (102) and an adjusting mounting portion (103); the air intake mounting portion (101) comprises a piston cavity (1011), the air storage portion (102) comprises an air storage cavity (1021), a circular flange (104) is provided between the piston cavity (1011) and the air storage cavity (1021), the base (2) and the air intake mounting portion (101) are fixed by a fastener (4), one end of the pressure reducing piston (3) extends into the base (2) and the other end extends into the air intake mounting portion (101) and abuts against the circular flange (104), the base (2) and the pressure reducing piston (3) are provided with an air intake passage communicating with the air storage cavity (1021), the adjusting mounting portion (103) is provided with an adjusting assembly (5), and the adjusting assembly (5) is provided with an air outlet passage communicating with the air storage cavity (1021).

2. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 1, characterized in that: The regulating assembly (5) comprises a separately arranged quantitative air outlet nozzle (501) and an adjusting switch (502); the regulating mounting portion (103) is provided with an installation cavity 1 (1031) and an installation cavity 2 (1032); the installation cavity 1 (1031) and the installation cavity 2 (1032) are connected via a connecting hole (1033); the quantitative air outlet nozzle (501) is detachably fixedly connected to the installation cavity 1 (1031); the quantitative air outlet nozzle (501) is provided with a first quantitative hole (501a); the adjusting switch (502) is adjustably fixedly connected to the installation cavity 2 (1032); the adjusting switch (502) is provided with a second quantitative hole (502a); and the adjusting switch (502) can be adjusted to open the first quantitative hole (501a) and / or the second quantitative hole (502a).

3. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 2, characterized in that: After one end of the regulating switch (502) is away from the connecting hole (1033), the air storage chamber (1021), the second mounting chamber (1032), the connecting hole (1033) and the first quantitative hole (501a) are connected in sequence, or after one end of the regulating switch (502) is closely against the connecting hole (1033), the air storage chamber (1021), the second mounting chamber (1032), the second quantitative hole (502a), the connecting hole (1033) and the first quantitative hole (501a) are connected in sequence.

4. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 3, characterized in that: A sealing gasket (5021) is fixedly arranged at one end of the regulating switch (502) close to the connecting hole (1033); a vent hole (5022) is arranged on the regulating switch (502); a second quantitative plate (5023) is fixedly arranged between the sealing gasket (5021) and the vent hole (5022); and the second quantitative hole (502a) is located on the second quantitative plate (5023).

5. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 3, characterized in that: The quantitative air outlet nozzle (501) further comprises a first quantitative plate (5011), the first quantitative hole (501a) is located on the first quantitative plate (5011), and the quantitative air outlet nozzle (501) is threadedly fixed to the inner wall of the first installation cavity (1031).

6. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 3, characterized in that: The adjusting mounting portion (103) is also provided with a safety hole (1038), the safety hole (1038) being in communication with the second mounting chamber (1032), a safety valve core (9) and a movable lock cap (10) being provided in the safety hole (1038), and a pressure spring (11) being provided between the safety valve core (9) and the movable lock cap (10).

7. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to any one of claims 2 to 6, characterized in that: The lower part of the adjustable mounting portion (103) is provided with a hand-filled air outlet cavity (1039) which is always connected to the second mounting cavity (1032); a hand-filled air outlet hole (6012) is provided on the hand-filled air outlet cavity (1039); and the opening directions of the first quantitative hole (501a) and the hand-filled air outlet hole (6012) are consistent.

8. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 7, characterized in that: A return spring (7) and a hand-made air outlet cavity (1039) are arranged in the hand-made air outlet cavity (1039); one end of the hand-made air outlet cavity (1039) is fixedly connected to a hand-made air outlet valve core (801); a hand-made air outlet block (601) is arranged in the hand-made air outlet cavity (1039); a middle hole of the hand-made air outlet block (601) is a hand-made air outlet hole (6012); and the hand-made air outlet core (801) can block or open the hand-made air outlet hole (6012).

9. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to any one of claims 2 to 6, characterized in that: The adjusting mounting portion (103) is provided with an air inlet hole 1 (1034), the air inlet hole 1 (1034) is always connected to the mounting chamber 2 (1032) and the air storage chamber (1021), a sealing ring block (1035) and a sealing cone block (1036) protrude from the mounting chamber 2 (1032), the adjusting switch (502) comprises a sealing section (5024), a fixing section (5025) and a handle section (5026) connected in sequence, the fixing section (5025) having an external thread and being fixed to the internal thread of the mounting chamber 2 (1032), The sealing section (5024) is provided with a sealing groove between the vent hole (5022) and the fixed section (5025); a sealing member (5027) is provided in the sealing groove; the sealing member (5027) is located between the sealing ring block (1035) and the sealing section (5024); the sealing cone block (1036) surrounds the connecting hole (1033); the sealing gasket (5021) is embedded in the end of the sealing section (5024) and abuts against the sealing cone block (1036); and the handle section (5026) is located outside the adjustment mounting portion (103).

10. The switch pressure reducer of the isolated compressed oxygen self-rescuer according to claim 9, characterized in that: The adjusting mounting portion (103) is provided with an air inlet hole 2 (1037) opposite to the air inlet hole 1 (1034), and the air inlet hole 2 (1037) is connected to the mounting cavity 2 (1032). The end of the adjusting mounting portion (103) away from the air inlet mounting portion (101) is fixedly connected to a manual compensation seat (6), and a return spring (7) and a manual compensation rod (8) are provided in the manual compensation seat (6), and the air inlet hole 2 (1037) is connected to the inner cavity of the manual compensation seat (6).

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