Pressure reducer assembly of self-rescuer

Abstract

A pressure reducer assembly of a self-rescuer comprises a bottle body, a deflation switch, a valve body, a piston and a first spring, the deflation switch is arranged at the air outlet end of the bottle body, the valve body is arranged at the air outlet end of the deflation switch, the piston and the first spring are both arranged in the valve body, and the piston is connected with the valve body through the first spring. A left valve cavity and a right valve cavity which are independent of each other are formed in a valve cavity of the valve body through a piston, a pressure relief hole, a first manual air supplementing hole, a second manual air supplementing hole and a normally-open air hole which are communicated with the right valve cavity are formed in the valve body, and a pressure relief device for automatically relieving pressure in the valve body is arranged in the pressure relief hole. A first hand supplementing device which can be manually opened to supplement oxygen when the respiratory system of a user is in a negative pressure state is arranged in the first hand supplementing hole, and a second hand supplementing device which can be manually operated and can adjust the oxygen flow is arranged in the second hand supplementing hole. A normally-open device which enables the normally-open air hole to always keep oxygen output and limits the oxygen output amount is arranged in the normally-open air hole.

Description

Technical Field

[0001] The utility model relates to the technical field of self-rescuers, in particular to a pressure reducer assembly of a self-rescuer. Background Art

[0002] As a self-rescue measure for workers in dangerous situations in mines, the self-rescuer can provide better rescue measures when danger occurs underground in the mine. Among them, the pressure reducing valve plays a particularly important role as a device for controlling the oxygen flow.

[0003] Publication (Announcement) No.: CN211327860U discloses a pressure reducing valve for a compressed oxygen self-rescuer, comprising a valve body, a pore connected to the interior of the valve body, a flow control valve core in the pore, and the flow control valve core for controlling the gas flow in the pore; the pore is a tapered structure with a small diameter at one end and a large diameter at the other end. The pressure reducing valve used in this self-rescuer provides oxygen to workers by exhausting air through the pore. The quantitative supply of oxygen is achieved by adjusting the gap between the flow control valve core and the inner wall of the tapered pore, thereby accurately controlling the oxygen flow to achieve a target flow and ensuring the uniformity of the oxygen flow to achieve continuous and effective oxygen supply, thereby ensuring that workers have sufficient oxygen to breathe. However, there are drawbacks. On the one hand, the flow control valve core may become stuck in the pore, resulting in the pore being unable to release oxygen in a timely manner. The oxygen can only be supplied by controlling the air supply device, which requires manual control. Manual control cannot accurately control the oxygen output, which can lead to rapid loss of oxygen. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a pressure reducer assembly of a self-rescuer to solve the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve its technical problems: the pressure reducer assembly of this self-rescuer includes a bottle body, a deflation switch, a valve body, a piston, and a first spring. The deflation switch is arranged at the air outlet end of the bottle body, the valve body is arranged at the air outlet end of the deflation switch, the piston and the first spring are both arranged in the valve body, the piston is connected to the valve body through the first spring, and the valve cavity thereof forms a left valve cavity and a right valve cavity which are independent of each other through the piston, the valve body is provided with a pressure relief hole connected with the right valve cavity, a first-hand air supply hole, a second-hand air supply hole, and a normally open air hole, a pressure relief device for automatically relieving the internal pressure of the valve body is provided in the pressure relief hole, a first-hand air supply hole is provided with a first-hand air supply hole which can be manually opened to supplement oxygen when the user's respiratory system is in a negative pressure state, a second-hand air supply hole is provided with a second-hand air supply hole which can be manually operated and can adjust the oxygen flow rate, and a normally open device which enables the normally open air hole to always keep discharging oxygen and limit the amount of oxygen discharging is provided in the normally open air hole.

[0006] To be further improved, the normally open device includes an air outlet seat and a sealing gasket. The air outlet seat is arranged in the normally open air hole and close to its air inlet end. The sealing gasket is arranged between the air outlet seat and the air inlet end of the normally open air hole and has an annular configuration.

[0007] Further improvement, an air passage is provided in the air seat to allow oxygen to pass through, and the air passage includes an entry section, a connecting section, a recovery section, and an exit section. The entry section and the recovery section are symmetrically distributed on both sides of the connecting section, and the configuration of the entry section and the recovery section are consistent and both are conical. The large diameter end of the entry section is close to the sealing gasket, and the small diameter end is connected to the connecting section. The small diameter end of the recovery section is connected to the connecting section, and the large diameter end is connected to the exit section. The inner diameter of the exit section is consistent with the large diameter end of the recovery section.

[0008] Further improvement, the pressure relief device includes an inner core, a core seat, a second spring, and a positioning screw. The inner core is embedded in the core seat and acts on the air inlet end of the pressure relief hole. The positioning screw is set in the pressure relief hole and forms a separation distance with the core seat. One end of the second spring abuts against the core seat, and the other end is placed in the inner cavity of the positioning screw.

[0009] Further improvement, the first-hand air supply device includes a quick connector, a connecting hose, and an on-off switch. The quick connector is arranged on the valve body, and its air inlet end is connected to the first-hand air supply hole. One end of the connecting hose is arranged at the air outlet end of the quick connector, and the other end is arranged at the air inlet end of the on-off switch. An exhaust hole is arranged on the on-off switch.

[0010] To further improve, the second-hand air supply device includes a plug, a third spring, and an operating rod. The plug is arranged at the air inlet end of the second-hand air supply hole. The third spring is sleeved on the plug and the other end abuts against the piston. The operating rod is arranged on the plug.

[0011] The beneficial effects of the utility model are:

[0012] The utility model provides a normally open air hole on the valve body so that the flow rate in a static state is 0.7L, so that the pressure reducer assembly always keeps discharging oxygen, and there is no need to turn on the oxygen replenishment switch when using oxygen. The first manual replenishment device and the second manual replenishment device manually increase the flow rate value of oxygen when discharging and are not turned on in a static state, and can be selectively opened when turned on to provide the user with the required amount of oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the full cross-section structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Schematic diagram of the local cross-section structure of AA;

[0015] Figure 3 For this utility model Figure 1 Schematic diagram of the partial cross-section structure of the middle BB;

[0016] Figure 4 This is a schematic diagram of the full cross-section structure of the air outlet seat of the utility model;

[0017] Figure 5 This is a structural diagram of another opening form of the on-off switch of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Referring to the accompanying drawings: the pressure reducer assembly of this self-rescuer includes a bottle body 1, a deflation switch 2, a valve body 31, a piston 32, and a first spring 33. The deflation switch 2 is arranged at the outlet end of the bottle body 1, and the valve body 31 is arranged at the outlet end of the deflation switch 2. The piston 32 and the first spring 33 are both arranged in the valve body 31. The piston 32 is connected to the valve body 31 through the first spring 33, and the valve cavity is formed into a mutually independent left valve cavity 31-1 and a right valve cavity 31-2 through the piston 32. The valve body 31 is provided with a pressure relief hole 31-3, a first pressure relief hole 31-4 and a first pressure relief hole 31-5 communicating with the right valve cavity 31-2. The manual air supply hole 31-4, the second manual air supply hole 31-5, and the normally open air hole 31-6, the pressure relief hole 31-3 is provided with a pressure relief device 4 for automatically relieving the internal pressure of the valve body 31, the first manual air supply hole 31-4 is provided with a first manual air supply device 5 that can be manually opened to supplement oxygen when the user's respiratory system is in a negative pressure state, the second manual air supply hole 31-5 is provided with a second manual air supply device 6 that can be manually operated and can adjust the oxygen flow rate, and the normally open air hole 31-6 is provided with a normally open device 7 that ensures that the normally open air hole 31-6 always keeps oxygen output and limits the oxygen output amount. The principle of the present invention is that the bottle body 1 is used to store oxygen, the deflation switch 2 is arranged at the gas outlet end of the bottle body, and the pressure reducer assembly is arranged on the deflation switch 2, that is, the oxygen is given to the oxygen bag in a quantitative manner through the pressure reducer assembly, and it can ensure safety in use, that is, oxygen enters the valve cavity of the valve body 31, the normally open air hole 31-6 is used to guide the oxygen to be discharged outward from the valve cavity, and the normally open device 7 is used to limit the flow value of the oxygen discharge, and the flow value is fixed, that is, the flow rate in the static state is 0.7L, so that the pressure reducer assembly always keeps oxygen out, the functions of the first-hand air supply hole 31-4 and the second-hand air supply hole 31-5 are consistent with those of the normally open air hole 31-6, and the two are respectively A first hand-fill device 5 and a second hand-fill device 6 are separately provided. Both hand-fill devices are used to increase the flow rate value of oxygen during discharge and are not opened in a static state. They can be selectively opened when opened, and the opening is selected according to the oxygen-deficient environment. The value of the first hand-fill device 5 during oxygen discharge is also a fixed value. The flow rate combined with the normally open device during oxygen discharge is 1.5L. The value of the second hand-fill device 6 during oxygen discharge is adjustable. The flow rate combined with the first hand-fill device 5 and the normally open device 7 during oxygen discharge is greater than 1.5L. The pressure relief device 4 serves as a safety protection measure, that is, when the pressure inside the valve body 31 is too high, it realizes automatic pressure relief to ensure that the pressure inside the valve body 31 remains at a normal value.

[0020] The normally open device 7 includes an air outlet seat 71 and a sealing gasket 72. The air outlet seat 71 is arranged in the normally open air hole 31-6 and close to its air inlet end. The sealing gasket 72 is arranged between the air outlet seat 71 and the air inlet end of the normally open air hole 31-6 and has a ring configuration. Such an arrangement allows the air outlet seat 71 to allow oxygen to pass through while also limiting the flow rate of oxygen discharge. The sealing gasket 72 is used to simultaneously seal the air outlet end of the normally open air hole 31-6 and the air inlet end of the air outlet seat 71, that is, oxygen only passes through the inner ring part of the sealing gasket 72, thereby preventing some oxygen from flowing to other places when discharging oxygen.

[0021] An air passage 71-1 for oxygen to pass through is provided in the air seat 71. The air passage 71-1 includes an entry section 71-11, a connecting section 71-12, a recovery section 71-13, and an exit section 71-14. The entry section 71-11 and the recovery section 71-13 are symmetrically distributed on both sides of the connecting section 71-12, and the configurations of the entry section 71-11 and the recovery section 71-13 are consistent and both have a conical configuration. The large diameter end of the entry section 71-11 is close to the sealing gasket 72, and the small diameter end is connected to the connecting section 71-12. The small diameter end of the recovery section 71-13 is connected to the connecting section 71-12, and the large diameter end is connected to the exit section 71-14. The inner diameter of the exit section 71-14 is consistent with the large diameter end of the recovery section 71-13. The air passage 71-1 allows oxygen to pass through the air seat 71, and the air is discharged. The channel 71-1 is composed of several sections with different functions. The entry section 71-11 is used to guide the entry of oxygen, and its conical configuration is set as the inner diameter of the entry section 71-11 gradually decreases. The oxygen will be squeezed by the change in size when passing through, and its flow rate will increase after squeezing. The connecting section 71-12 is used to connect with the entry section 71-11 and the recovery section 71-13, so that the oxygen reaches the recovery section 71-13 through the connecting section 71-12. The configuration of the recovery section 71-13 is consistent with that of the entry section 71-11, but the large diameter ends of the two are arranged relative to each other. This setting allows the oxygen to maintain a high-speed flow state before reaching the large diameter end of the recovery section 71-13, so that the oxygen can quickly reach the outlet end of the normally open air hole 17 and fill the oxygen bag in time.

[0022] The pressure relief device 4 includes an inner core 41, a core seat 42, a second spring 43, and a positioning screw 44. The inner core 41 is embedded in the core seat 42 and acts on the air inlet end of the pressure relief hole 31-3. The positioning screw 44 is arranged in the pressure relief hole 31-3 and forms a separation distance with the core seat 42. One end of the second spring 43 abuts against the core seat 42, and the other end is placed in the inner cavity of the positioning screw 44. The core seat 42 provides an installation position for the inner core 41, that is, the inner core 41 is embedded in the core seat 42, and the inner core 41 is blocked in the pressure relief hole 14. At the air inlet end, the positioning screw 44 provides support, so that one end of the second spring 43 abuts against the core seat 42 and the other end is placed in the inner cavity of the positioning screw 44. The second spring 43 is compressed and deformed during automatic pressure relief, so that the core seat 42 drives the inner core 41 to release the blockage of the air inlet end of the pressure relief hole 31-3, so that the internal pressure of the valve body 1 is quickly discharged, and when the internal pressure of the valve body 1 returns to normal, the second spring 43 uses its elasticity to reset the core seat 42 and restore the blockage of the air inlet end of the pressure relief hole 31-3.

[0023] The first manual air supply device 5 includes a quick connector 51, a connecting hose 52, and an on / off switch 53. The quick connector 51 is mounted on the valve body 31, with its air inlet end communicating with the first manual air supply hole 31-4. The connecting hose 52 has one end connected to the air outlet of the quick connector 51 and the other end connected to the air inlet of the on / off switch 53. The on / off switch 53 is provided with an exhaust hole 53-1. The quick connector 51 is mounted on the valve body 31, with its air inlet end communicating with the first manual air supply hole 31-4. This facilitates the installation of the connecting hose 52. The other end of the connecting hose 52 is used to install the on / off switch 53. This arrangement is intended to keep the on / off switch 53 away from the second manual air supply device 6, thereby preventing it from affecting its opening. The on / off switch 53 is a manual switch. If the flow rate from the normally-open air hole 31-6 is insufficient to fill the oxygen bag, the user can increase the flow rate by turning on the on / off switch 53. Oxygen then enters the oxygen bag through the exhaust hole 53-1 of the on / off switch 53. In this embodiment, the on-off switch 53 can be opened by a twisting operation or a twisting operation.

[0024] The second-hand air supply device 6 includes a plug 61, a third spring 62, and an operating rod 63. The plug 61 is arranged at the air inlet end of the second-hand air supply hole 31-5. The third spring 62 is mounted on the plug 61 and its other end abuts against the piston 2. The operating rod 63 is arranged on the plug 61. That is, in the non-open state, the plug 61 blocks the second-hand air supply hole 31-5 to prevent oxygen from being discharged from the second-hand air supply hole 16. One end of the operating rod 63 is fixedly connected to the plug 61, and the other end is a gripping end. The operating rod 63 is used to move the plug 61 inward, so that a gap is generated between the plug 61 and the air inlet end of the second-hand air supply hole 31-5. The greater the distance the plug 61 moves, the larger the gap is, and the greater the oxygen flow rate is. The third spring 62 resets the plug 61 automatically after the user releases control of the operating rod 63. The plug 61 in this embodiment has a T-shaped configuration, which ensures a larger opening, a more stable seal, and simple assembly.

[0025] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A pressure reducer assembly of a self-rescuer, comprising a bottle body (1), a deflation switch (2), a valve body (31), a piston (32), and a first spring (33), wherein the deflation switch (2) is arranged at the outlet end of the bottle body (1), the valve body (31) is arranged at the outlet end of the deflation switch (2), the piston (32) and the first spring (33) are both arranged in the valve body (31), the piston (32) is connected to the valve body (31) through the first spring (33), and the valve cavity thereof is formed into a left valve cavity (31-1) and a right valve cavity (31-2) which are independent of each other by the piston (32), characterized in that: The valve body (31) is provided with a pressure relief hole (31-3) connected to the right valve chamber (31-2), a first hand-supply air hole (31-4), a second hand-supply air hole (31-5), and a normally open air hole (31-6). The pressure relief hole (31-3) is provided with a pressure relief device (4) for automatically relieving the internal pressure of the valve body (31). The first hand-supply air hole (31-4) is provided with a first hand-supply air device (5) that can be manually opened to supplement oxygen when the user's respiratory system is in a negative pressure state. The second hand-supply air hole (31-5) is provided with a second hand-supply air device (6) that can be manually operated and can adjust the oxygen flow rate. The normally open air hole (31-6) is provided with a normally open device (7) that allows the normally open air hole (31-6) to always keep oxygen output and limit the oxygen output amount.

2. The pressure reducer assembly of the self-rescuer according to claim 1, characterized in that: The normally open device (7) comprises an air outlet seat (71) and a sealing gasket (72); the air outlet seat (71) is arranged in the normally open air hole (31-6) and close to its air inlet end; the sealing gasket (72) is arranged between the air outlet seat (71) and the air inlet end of the normally open air hole (31-6) and has an annular configuration.

3. The pressure reducer assembly of the self-rescuer according to claim 2, characterized in that: The air outlet seat (71) is provided with an air outlet passage (71-1) for oxygen to pass through. The air outlet passage (71-1) includes an entry section (71-11), a connection section (71-12), a recovery section (71-13), and an exit section (71-14). The entry section (71-11) and the recovery section (71-13) are symmetrically distributed on both sides of the connection section (71-12). The configurations of the sections (71-13) are consistent and all present a conical configuration. The large diameter end of the entry section (71-11) is close to the sealing gasket (72), and the small diameter end is connected to the connecting section (71-12). The small diameter end of the recovery section (71-13) is connected to the connecting section (71-12), and the large diameter end is connected to the exit section (71-14). The inner diameter of the exit section (71-14) is consistent with the size of the large diameter end of the recovery section (71-13).

4. The pressure reducer assembly of the self-rescuer according to claim 1, characterized in that: The pressure relief device (4) includes an inner core (41), a core seat (42), a second spring (43), and a positioning screw (44); the inner core (41) is embedded in the core seat (42) and acts on the air inlet end of the pressure relief hole (31-3); the positioning screw (44) is arranged in the pressure relief hole (31-3) and forms a separation distance with the core seat (42); one end of the second spring (43) abuts against the core seat (42), and the other end is placed in the inner cavity of the positioning screw (44).

5. The pressure reducer assembly of the self-rescuer according to claim 1, characterized in that: The first manual air supply device (5) comprises a quick connector (51), a connecting hose (52), and an on-off switch (53). The quick connector (51) is arranged on the valve body (31), and its air inlet end is connected to the first manual air supply hole (31-4). One end of the connecting hose (52) is arranged at the air outlet end of the quick connector (51), and the other end is arranged at the air inlet end of the on-off switch (53). The on-off switch (53) is provided with an exhaust hole (53-1).

6. The pressure reducer assembly of the self-rescuer according to claim 1, characterized in that: The second manual air supply device (6) comprises a plug (61), a third spring (62), and an operating rod (63); the plug (61) is arranged at the air inlet end of the second manual air supply hole (31-5); the third spring (62) is sleeved on the plug (61) and the other end abuts against the piston (32); and the operating rod (63) is arranged on the plug (61).

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