CN217927326U - Oxygen cabin relief valve and oxygen cabin - Google Patents

Abstract

The utility model discloses an oxygen cabin safety valve and an oxygen cabin, wherein the safety valve comprises a valve body, a valve rod arranged in the valve body and an elastic piece acting on the valve rod, the valve body is provided with an air inlet and an air outlet, one end of the valve rod is provided with a sealing piece, and the valve rod can move relative to the valve body so as to seal the sealing piece or open the air outlet; valve body inside still establishes and has spacing portion, valve rod and spacing portion cooperation, so that the axial motion of valve body is followed to the sealing member, spacing portion and valve rod cooperation, make the valve rod only can follow the axis direction motion of valve body, thereby guarantee the state of the sealing member of valve rod tip, make the sealing member remove with the state of ideal all the time, and can not take place crooked, the circumference of sealing member is more even with the butt of valve body, thereby block up the gas outlet completely, guarantee the sealing member leakproofness to the gas outlet under the low pressure, in long-term motion or transportation, still guarantee the stability of sealing member position, make the settlement pressure of relief valve remain stable, avoid pressure drift.

Description

Oxygen cabin relief valve and oxygen cabin

Technical Field

The utility model belongs to the technical field of the oxygen cabin, concretely relates to oxygen cabin relief valve and oxygen cabin.

Background

The oxygen chamber device is a device for pressurizing the air pressure in a closed chamber. In the medical and health industries, the oxygen cabin can be used for oxygen therapy for people with high altitude reaction and high altitude diseases, and can also be used for middle-aged and old people with weak body, brain overexertion and the like, and people working and living in an oxygen-deficient environment.

When the oxygen cabin works, the cabin body needs to be pressurized firstly, so that the internal pressure of the cabin body is higher than the environmental pressure. In the pressurizing process, in order to improve the use safety, the oxygen chamber is usually provided with a safety valve, and when the pressure in the chamber is higher than a set value, the safety valve device automatically releases the pressure, so that the over-high pressure in the chamber body can be prevented, a user and the chamber body are protected, and the exchange of the gas inside the chamber body and the outside gas can be realized.

The safety valve device of the existing oxygen chamber emphasizes the basic functions of realizing overpressure pressure relief and air exchange inside and outside the chamber, but in the specific use process, the following defects exist: firstly, the leakproofness of relief valve under the low pressure environment is relatively poor, leads to the under-deck pressure boost speed slow. The reason is mainly that the valve plate and the sealing gasket of the safety valve are prone to deflection in the reciprocating movement process, so that the sealing surface is stressed unevenly, the valve plate and the sealing gasket cannot completely block the air leakage opening of the safety valve, and air leakage is prone to occurring in advance. Secondly, the overall stability of the safety valve is poor, and when a valve plate of the safety valve is opened or closed or is interfered by the outside (such as transportation vibration or manual shifting), the reset position may be greatly changed compared with the last time, so that the pressure relief pressure drifts. Thirdly, the air leakage port of the safety valve is directly communicated with the interior of the cabin body, a large amount of high-pressure gas is gathered at the safety valve and is leaked, noise is generated, and user experience is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oxygen cabin relief valve and oxygen cabin to solve at least one among the above-mentioned technical problem.

The utility model discloses the technical scheme who adopts does:

an oxygen chamber safety valve comprises a valve body, a valve rod arranged in the valve body and an elastic piece acting on the valve rod, wherein the valve body is provided with an air inlet and an air outlet, one end of the valve rod is provided with a sealing piece, and the valve rod can move relative to the valve body under the pushing action of air flow and the elastic piece so as to enable the sealing piece to block or open the air outlet; the valve body is internally provided with a limiting part, and the valve rod can be matched with the limiting part so that the sealing element moves along the axial direction of the valve body.

The limiting portion comprises a separating rib arranged inside the valve body, a limiting hole is formed in the separating rib, and the valve rod penetrates through the limiting hole and is matched with the stop of the inner wall of the limiting hole.

The oxygen chamber safety valve further comprises a fixing seat, the fixing seat is sleeved on the periphery of the valve rod, the fixing seat is provided with a matching portion extending along the axis direction of the fixing seat, and the matching portion extends into the limiting hole to be matched with the valve body.

The valve comprises a valve rod and is characterized in that a valve plate is further arranged at one end of the valve rod, the valve plate is provided with a first fixing portion, the fixing seat is provided with a second fixing portion, the first fixing portion and the second fixing portion are arranged at intervals in the axial direction of the valve rod, and the first fixing portion and the second fixing portion are clamped and fixed to the sealing element.

The oxygen chamber safety valve further comprises a silencing cover, the silencing cover is arranged at one end, provided with the air inlet, of the valve body, the silencing cover is provided with a containing cavity, a silencing piece is arranged in the containing cavity, and a throttling groove is formed in the side wall of the silencing cover.

The inside inner ring muscle position that is provided with of amortization cover, inner ring muscle position with the lateral wall cooperation of amortization cover encloses into hold the chamber, inner ring muscle position has the cooperation region and dodges the region along self circumference, the cooperation region with the valve body cooperation is fixed, dodge the region with the valve body cooperation forms the throttle clearance, the throttle clearance with the throttle groove is followed the radial dislocation set of amortization cover.

The valve body is internally provided with an air flow channel communicated with the air inlet and the air outlet and a separation part arranged in the air flow channel, the separation part is positioned between the air inlet and the air outlet, and the separation part is provided with a plurality of throttling ports.

The gas outlet is followed the axis direction of valve body has the inlet end and gives vent to anger the end, the gas outlet is in the axis direction of valve body is reducing structure, just the diameter of inlet end is less than the diameter of the end of giving vent to anger, the sealing member can with the inner wall butt of gas outlet is in order to seal the gas outlet.

The periphery of valve body has still linked firmly connecting portion, connecting portion follow the radial outside extension of valve body is in order to form the welding plane.

The utility model also discloses an oxygen cabin, including the cabin body to and foretell oxygen cabin relief valve, the installing port has been seted up to the cabin body, oxygen cabin relief valve set up in the installing port.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. the valve rod in the oxygen chamber safety valve enables the sealing element to seal the air outlet under the action of the elastic force of the elastic element, when the air pressure in the oxygen chamber is higher than a set value, the air pushes the valve rod to move, the sealing element opens the air outlet, high-pressure air is discharged from the air outlet to realize pressure relief, meanwhile, the elastic element is compressed, when the air pressure in the oxygen chamber is lower than the set value, the pushing force on the valve rod is reduced, the valve rod resets under the action of the elastic force of the elastic element, and the sealing element returns to a state of sealing the air outlet.

Furthermore, the utility model discloses an inside spacing portion that still is provided with of valve body, spacing portion with the valve rod cooperation, in order to restrict the moving direction of valve rod makes the valve rod only can be followed the axis direction motion of valve body, thereby guarantees the valve rod tip the state of sealing member makes the sealing member removes with the state of ideal all the time, and can not take place crooked, the circumference of sealing member with the butt of valve body is more even, thereby will the gas outlet is the shutoff completely, guarantees the sealing member is right under the low pressure the leakproofness of gas outlet. Meanwhile, the limiting part limits the valve rod to incline, so that the stability of the valve rod is improved in the long-term movement or transportation process, the stability of the position of the sealing element is further ensured, the set pressure of the safety valve is kept stable, and the pressure drift, namely the pressure relief pressure is prevented from changing.

2. As a preferred embodiment of the utility model, spacing portion including set up in the inside separation muscle of valve body, spacing hole has been seted up to the separation muscle, the valve rod passes spacing hole, and with the inner wall backstop cooperation in spacing hole. The valve rod passes spacing hole receives the backstop of the pore wall in spacing hole, and right the valve rod is spacing, simple structure, easy realization, simultaneously the partition muscle can also with the one end of elastic component forms the butt, makes the elastic component atress is even, avoids the elastic component both sides atress is uneven leads to the deformation direction skew the axis of valve body influences life.

3. As a preferred embodiment of the present invention, the oxygen chamber safety valve further comprises a silencing cover, the silencing cover is disposed on the valve body, the valve body is opened up at one end of the air inlet, the silencing cover has an accommodating cavity, a silencing piece is disposed in the accommodating cavity, and a throttling groove is disposed on the side wall of the silencing cover. The high-pressure airflow in the oxygen cabin enters the silencing cover through the throttling groove and then enters the valve body, and the throttling groove reduces the airflow entering the silencing cover in unit time, so that the airflow flows in gradually and uniformly in a small amount, the noise generated when the airflow flows through is reduced, and the phenomenon that the airflow flows at a high speed in a large amount to generate squeaking sound is avoided. Moreover, the silencing piece is filled in the silencing cover, and when airflow enters the silencing cover, the airflow flows through the silencing piece to realize noise reduction again. Therefore, in the process that the air flow enters the silencing cover, the air flow passes through the throttling groove and the silencing piece for twice silencing and noise reduction, noise in the pressure relief process is greatly reduced, and use experience is improved.

4. As a preferred embodiment of the present invention, the valve body is provided with a communication passage inside the air inlet and the air outlet, and a separation portion disposed inside the air passage, the separation portion is located between the air inlet and the air outlet, and the separation portion is provided with a plurality of orifices. After the air flow enters the valve body and before the air flow flows out of the air outlet of the valve body, the air flow passes through the throttling opening of the partition part, and then noise reduction is carried out in the valve body again, the throttling opening plays a throttling role in the air flow, so that the air flow is more dispersed, the air flow is prevented from being intensively sprayed out in the valve body to generate noise, and the integral noise reduction effect of the safety valve is further improved.

5. As a preferred embodiment of the utility model, the gas outlet is followed the axis direction of valve body has the inlet end and gives vent to anger the end, the gas outlet is in the axis direction of valve body is reducing structure, just the diameter of inlet end is less than give vent to anger the diameter of end, the sealing member can with the inner wall butt of gas outlet is in order to seal the gas outlet. The inner diameter of the gas outlet is of a variable diameter structure and gradually increases outwards from the valve body, so that on one hand, the sealing element is abutted against the inner wall of the gas outlet towards the direction of the valve body under the action of the elastic element, and the sealing element is abutted against the inner wall of the gas outlet more tightly due to the fact that the inner diameter of the gas outlet is gradually reduced in the direction, and the sealing performance of the safety valve is improved. On the other hand, when the sealing element opens the air outlet, the air flow in the valve body is sprayed out of the air outlet, and in the direction, the inner diameter of the air outlet is gradually increased, so that the air flow is gradually dispersed in the discharging process, the air pressure is gradually reduced, the flow speed of the air flow is reduced, and the noise generated in the air flow spraying process is further reduced.

6. The utility model also discloses an oxygen cabin, including the cabin body to and foretell oxygen cabin relief valve, the installing port has been seted up to the cabin body, oxygen cabin relief valve set up in the installing port. The utility model discloses an oxygen cabin is when using the internal in-process that steps up in cabin, the relief valve the shutoff of sealing member butt the gas outlet guarantees the gas tightness, makes the internal atmospheric pressure in cabin rises steadily, and can not take place gas leakage. When the air pressure in the cabin body reaches a set value, the cabin inner airflow pushes the valve rod to overcome the elasticity of the elastic piece to move, the sealing piece opens the air outlet, high-pressure airflow is discharged, and pressure relief is achieved. The limiting part limits the moving direction of the valve rod to be along the axis direction of the valve body, so that the sealing element and the axis of the air outlet move in a mutually perpendicular state all the time, the sealing effect is guaranteed, and the sealing element is prevented from being skewed to cause sealing failure. And the reliability and the service life of the oxygen chamber safety valve are further improved, and the use experience is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a sectional view of the oxygen chamber safety valve according to an embodiment of the present invention;

FIG. 2 is an exploded view of the oxygen chamber safety valve of FIG. 1;

FIG. 3 is a schematic structural view of the valve body of FIG. 2;

FIG. 4 is a schematic structural view of the valve plate shown in FIG. 2;

FIG. 5 is a schematic structural view of the fixing base shown in FIG. 2;

FIG. 6 is a schematic view of the spring top buckle shown in FIG. 2;

fig. 7 is a schematic structural view of the sound-deadening cap shown in fig. 2.

Wherein:

1, a valve body; 11 an air inlet; 12 air outlet; 121 an air inlet end; 122 an air outlet end; 13 a limiting part; 131 limiting holes; 14 a first fixing nut; 15 a second fixing nut; 16 a partition part; 161 orifice;

2, a valve rod;

3, an elastic member;

4, sealing elements;

5, fixing a base; 51 a second fixed part; 52 a mating portion;

6, a valve plate; 61 a first fixed part; 62 of a boss;

7, a silencing cover; 71 a throttling groove; 72 a sound attenuating element; 73 inner ring rib positions; 74 a cavity; 75 mating area; 76 avoiding a zone;

8, buckling a spring top; 81 a first butting part; 82 a second butting portion; 83 grooves; 84 through holes;

9 a connecting part; 91 welding the flat surfaces.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. In the description herein, references to the terms "embodiment," "an example" or "specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 7, an oxygen chamber safety valve comprises a valve body 1, a valve rod 2 arranged inside the valve body 1, and an elastic member 3 acting on the valve rod 2, wherein the valve body 1 is provided with an air inlet 11 and an air outlet 12, one end of the valve rod 2 is provided with a sealing member 4, and the valve rod 2 can move relative to the valve body 1 under the pushing action of air flow and the elastic member 3, so that the sealing member 4 blocks or opens the air outlet 12; the valve body 1 is also internally provided with a limiting part 13, and the valve rod 2 can be matched with the limiting part 13 so as to enable the sealing element 4 to move along the axial direction of the valve body 1.

The valve rod 2 in the oxygen chamber safety valve enables the sealing element 4 to block the air outlet 12 under the action of the elastic force of the elastic element 3, when the air pressure in the oxygen chamber is higher than a set value, the pushing force of the air on the valve rod 2 is greater than the elastic force of the elastic element 3, the valve rod 2 is enabled to move, the sealing element 4 opens the air outlet 12, high-pressure air is discharged from the air outlet 12 to achieve pressure relief, meanwhile, the elastic element 3 is compressed, when the air pressure in the oxygen chamber is lower than the set value, the pushing force on the valve rod 2 is reduced, the valve rod 2 resets under the action of the elastic force of the elastic element 3, and the sealing element 4 restores to a state of blocking the air outlet 12.

Preferably, the elastic member 3 is a spring.

Furthermore, the utility model discloses a 1 inside spacing portion 13 that still is provided with of valve body, spacing portion 13 with 2 cooperations of valve rod, in order to restrict the moving direction of valve rod 2 makes valve rod 2 only can be followed the axis direction motion of valve body 1, thereby guarantees 2 tip of valve rod the state of sealing member 4 makes sealing member 4 removes with the state of ideal all the time, and can not take place crooked, the circumference of sealing member 4 with the butt of valve body 1 is more even, thereby will 12 complete shutoff in gas outlet, guarantees sealing member 4 is right under the low pressure the leakproofness of gas outlet 12. Meanwhile, the limiting part 13 also limits the inclination of the valve rod 2, so that the stability of the valve rod 2 is improved in the long-term movement or transportation process, the stability of the position of the sealing element 4 is further ensured, the set pressure of the safety valve is kept stable, and the pressure drift, namely the pressure relief pressure is prevented from changing.

The safety valve mainly utilizes the gas pressure and the principle that the elasticity of the elastic part 3 is balanced mutually, when the pressure in the cabin is higher than the set value, the gas pressure is greater than the elasticity of the elastic part 3, the sealing part 4 is ejected and leaked. During the ejection process, the valve rod 2 is matched with the limiting part 13 and can only axially slide, so that the function of preventing the sealing element 4 from inclining is achieved. Opening pressure is more accurate, and the position after reseing is also more stable.

It should be noted that the utility model discloses right the valve rod 2 with spacing portion 13's cooperation mode does not do specifically to prescribe a limit to, in a preferred embodiment, as shown in fig. 1, fig. 3, spacing portion 13 including set up in the inside partition muscle of valve body 1, spacing hole 131 has been seted up to the partition muscle, valve rod 2 passes spacing hole 131, and with the cooperation of spacing hole 131's inner wall backstop.

Valve rod 2 passes spacing hole 131 receives the backstop of spacing hole 131's pore wall, and right valve rod 2 is spacing, simple structure, easy realization, simultaneously the separation muscle can also with the one end of elastic component 3 forms the butt, makes elastic component 3 atress is even, avoids 3 both sides atress inequality of elastic component leads to the deformation direction skew the axis of valve body 1 influences life.

Of course, the valve rod 2 and the limiting portion 13 may also adopt other stop cooperation modes, for example, the valve rod 2 is provided with a protruding structure, and the limiting portion 13 is a groove structure arranged inside the valve body 1, so that the two cooperate to form the limit of the valve rod 2. As another example, the limiting portion 13 is a supporting rib extending inward from the inner wall of the valve body 1, and the supporting rib is arranged along the circumferential direction of the valve rod 2 and supports against the periphery of the valve rod 2 to limit the valve rod 2.

Further, as shown in fig. 1, 2, and 5, the oxygen chamber safety valve further includes a fixing seat 5, the fixing seat 5 is sleeved on the periphery of the valve rod 2, the fixing seat 5 has a fitting portion 52 extending along the axis direction, and the fitting portion 52 extends into the limiting hole 131 to be fitted with the valve body 1.

The valve rod 2 is located through the cover the outside the fixing base 5 with spacing hole 131 cooperation is spacing, has reduced on the one hand the valve rod 2 with assembly error between the spacing hole 131 prevents the valve rod 2 is in rock in the spacing hole 131, on the other hand the fixing base 5 can also play right sealing member 4's fixed action, makes sealing member 4 with the connection of valve rod 2 is more stable.

Specifically, as shown in fig. 5, the fixing seat 5 has a disc-shaped seat body for fixing the sealing element 4, one side of the seat body, which is away from the sealing element 4, extends along the axial direction of the valve body 1 to form the fitting portion 52, and the fitting portion 52 extends into the limiting hole 131.

Furthermore, as shown in fig. 1, fig. 2 and fig. 4, a valve plate 6 is further disposed at one end of the valve rod 2, the valve plate 6 has a first fixing portion 61, the fixing seat 5 has a second fixing portion 51, the first fixing portion 61 and the second fixing portion 51 are disposed at an interval in the axial direction of the valve rod 2, and the first fixing portion 61 and the second fixing portion 51 are clamped and fixed to the sealing element 4.

Through valve block 6 with 5 centre gripping of fixing base is fixed sealing member 4 need not set up complicated connection structure on the sealing member 4, has reduced the processing degree of difficulty, also need not set up the hole that is used for fixing on the sealing member 4, guarantee sealing member 4's structure is intact, guarantees sealed effect, prevents to leak gas.

Specifically, as shown in fig. 1 and 2, the sealing element 4 is an annular structure, a central region of the sealing element 4 is provided with an opening for the valve rod 2 to pass through, after the valve rod 2 passes through the sealing element 4, the sealing element 4 is limited in lateral movement, meanwhile, the first fixing portion 61 and the second fixing portion 51 are used for clamping and fixing the sealing element 4, the sealing element 4 is fixed along the axial direction of the valve rod 2, so that the sealing element 4 is completely fixed, and the position of the sealing element 4 is stabilized. The seal 4 abuts against the valve body 1 with a circumferential side surface to form a seal against the outlet port 12.

Preferably, as shown in fig. 4 and 5, the valve plate 6 has a boss 62, and the boss 62 is internally provided with an internal thread and is fixed to one end of the valve rod 2 through a threaded connection. The sealing element 4 is of a cylindrical structure, and a round hole in the center of the sealing element 4 is sleeved on the boss 62 of the valve plate 6 during installation.

Further, as shown in fig. 1 and 2, the safety valve further includes a first fixing nut 14, a second fixing nut 15 and a spring top buckle 8, the valve plate 6, the sealing element 4 and the fixing seat 5 are fixed to the first fixing nut 14 through one end of the valve rod 2, and the second fixing nut 15 and the spring top buckle 8 are disposed at the other end of the valve rod 2.

As shown in fig. 6, the spring top buckle 8 is a cross structure and has a first abutting portion 81 and a second abutting portion 82, and the diameter of the second abutting portion 82 is greater than the diameter of the first abutting portion 81, so as to form a step surface between the first abutting portion 81 and the second abutting portion 82. The diameter of the second abutting portion 82 is larger than the inner diameter of the elastic member 3, the diameter of the first abutting portion 81 is smaller than the inner diameter of the elastic member 3, the second abutting portion 82 is provided with a hexagonal groove 83 for accommodating the second fixing nut 15 therein, and a through hole 84 is formed in the middle of the spring top buckle 8. During installation, the elastic element 3 is sleeved on the first abutting portion 81 and abuts against the step surface, and the valve rod 2 penetrates through the through hole 84 and the second fixing nut 15 to keep the compression state of the elastic element 3.

Meanwhile, the initial deformation amount of the elastic member 3 can be adjusted by adjusting the axial positions of the second fixing nut 15 and the spring top buckle 8, so that the elastic force of the elastic member 3 is adjusted, and the pressure for opening the safety valve can be adjusted.

As a preferred embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 7, the oxygen chamber safety valve further includes a silencing cover 7, the silencing cover 7 is disposed on the valve body 1, the air inlet 11 is disposed at one end of the valve body, the silencing cover 7 has an accommodating cavity 74, a silencing piece 72 is disposed in the accommodating cavity 74, and a throttling groove 71 is disposed on a side wall of the silencing cover 7.

The high-pressure airflow in the oxygen cabin enters the silencing cover 7 through the throttling groove 71 and then enters the valve body 1, and the existence of the throttling groove 71 reduces the airflow quantity entering the silencing cover 7 in unit time, so that the airflow gradually flows in uniformly and slightly, the noise generated when the airflow flows through is reduced, and the airflow is prevented from flowing at a high speed to generate squeaking sound. Furthermore, the silencing piece 72 is filled inside the silencing cover 7, and the silencing piece 72 is made of silencing material and is filled in the cavity 74. When the air flow enters the silencing cover 7, the air flow passes through the silencing piece 72, and the noise is reduced again. Therefore, in the process that the air flow enters the silencing cover 7, the air flow passes through the throttling groove 71 and the silencing piece 72 for twice silencing and noise reduction, so that the noise in the pressure relief process is greatly reduced, and the use experience is improved.

As a preferred embodiment of the present invention, as shown in fig. 1 and 7, an inner annular rib position 73 is provided inside the muffling cover 7, the inner annular rib position 73 and the side wall of the muffling cover 7 cooperate to enclose the containing cavity 74, the inner annular rib position 73 has a fitting region 75 and an avoiding region 76 along its own circumferential direction, the fitting region 75 is fixedly fitted to the valve body 1, the avoiding region 76 cooperates with the valve body 1 to form a throttling gap, and the throttling gap and the throttling groove 71 are arranged in a staggered manner along the radial direction of the muffling cover 7.

The cooperation area 75 of the inner ring rib position 73 is in fit contact with the valve body 1, and the avoiding area 76 is provided with a throttling gap between the valve body 1, so that the air flow is throttled again at the position, when the air flow enters the silencing cover 7 and enters the valve body 1 from the silencing cover 7, throttling is respectively carried out, the passing air flow is reduced, the air flow is prevented from being gathered, and the noise reduction effect is improved.

Meanwhile, the throttling gap and the throttling groove 71 are arranged in a staggered mode, so that the flowing path of the airflow in the silencing cover 7 is prolonged, the contact time of the airflow and the silencing piece 72 is prolonged, and the flow speed of the airflow is reduced, so that the noise generated by the airflow flowing is further reduced.

In a specific example of the present embodiment, as shown in fig. 7, two throttle grooves 71 are provided on the side wall of the muffler cover 7 in the radial direction of the muffler cover 7, two throttle gaps are also provided on the inner circumferential rib 73 in the radial direction of the muffler cover 7, and the diameter of the muffler cover 7 where the two throttle grooves 71 are located and the radius of the muffler cover 7 where the two throttle gaps are located are perpendicular to each other. Of course, the throttle gap and the throttle groove 71 may be provided in one or more numbers, as long as they are offset from each other in the radial direction of the muffler cover 7.

Preferably, as shown in fig. 1, 2 and 7, an end of the valve body 1 is provided with an external thread, the silencing cover 7 is provided with an internal thread at the fitting region 75, and the avoiding region 76 is not threaded, so that the fitting region 75 is in threaded connection and contact with the valve body 1, and the avoiding region 76 and the valve body 1 form the throttling gap therebetween.

In a preferred embodiment of the present invention, as shown in fig. 1 and 3, an airflow channel communicating the air inlet 11 and the air outlet 12 and a partition 16 disposed in the airflow channel are provided inside the valve body 1, the partition 16 is located between the air inlet 11 and the air outlet 12, and the partition 16 is provided with a plurality of orifices 161.

After entering the valve body 1, the air flow passes through the throttling orifice 161 of the partition part 16 before flowing out from the air outlet 12 of the valve body 1, and then noise reduction is performed inside the valve body 1 again, the throttling orifice 161 performs a throttling function on the air flow, so that the air flow is more dispersed, noise is prevented from being intensively sprayed inside the valve body 1, and the noise reduction effect of the whole safety valve is further improved.

As a preferred embodiment of the present invention, as shown in fig. 1 and fig. 3, the gas outlet 12 is along the axis direction of the valve body 1 has a gas inlet 121 and a gas outlet 122, the gas outlet 12 is in the axis direction of the valve body 1 is a reducing structure, the diameter of the gas inlet 121 is smaller than the diameter of the gas outlet 122, the sealing member 4 can abut against the inner wall of the gas outlet 12 to seal the gas outlet 12.

The inner diameter of the gas outlet 12 is of a diameter-variable structure and gradually increases outwards from the valve body 1, so that on one hand, the sealing element 4 is abutted against the inner wall of the gas outlet 12 towards the direction of the valve body 1 under the action of the elastic element 3, and the inner diameter of the gas outlet 12 is gradually reduced in the direction, so that the abutting of the sealing element 4 and the inner wall of the gas outlet 12 is tighter, and the sealing performance of the safety valve is improved. On the other hand, when the sealing member 4 opens the air outlet 12, the air flow in the valve body 1 is ejected from the air outlet 12, and in this direction, the inner diameter of the air outlet 12 gradually increases, so that the air flow is gradually dispersed in the process of being discharged, the air pressure gradually decreases, the flow velocity of the air flow decreases, and the noise generated when the air flow is ejected is further reduced.

The utility model discloses do not specifically limit to the structure of gas outlet 12, it includes but not limited to the condition enumerated in the following embodiment:

example 1: in the present embodiment, as shown in fig. 1 and fig. 3, the diameter of the air outlet 12 gradually increases from the air inlet end 121 to the air outlet end 122 to form a slope structure. Under the action of the elastic piece 3, the valve rod 2 drives the sealing piece 4 to move towards the valve body 1, under the pulling action of the valve rod 2, the side wall of the sealing piece 4 is tightly abutted to the inclined plane structure, the sealing piece 4 is elastically deformed, and the inner diameter of the inclined plane structure is gradually reduced, so that the sealing piece 4 is abutted to the inner wall of the air outlet 12 more tightly, and the sealing effect is improved.

Example 2: in this embodiment, the gas outlet 12 has a step surface between the gas inlet end 121 and the gas outlet end 122, and the sealing member 4 abuts against the step surface to seal the gas outlet 12. In the embodiment, the end surface of the sealing member 4 abuts against the step surface to form sealing, and the contact area between the sealing member 4 and the step surface is large, so that the sealing performance is good.

In a preferred embodiment of the present invention, as shown in fig. 1 and fig. 2, the periphery of the valve body 1 is further fixedly connected with a connecting portion 9, and the connecting portion 9 extends radially outward of the valve body 1 to form a welding plane 91.

Will through the welding the relief valve is fixed in the oxygen cabin, saves the use of adapting unit such as bolt, screw rod, adopts welded mode, just connecting portion 9 has the welding plane, increases welding area, reduces the welding degree of difficulty, and joint strength is higher, and connecting portion can adopt the same material and colour with the cabin body, play the hidden design at connection position, improve pleasing to the eye.

As shown in fig. 1, the valve body 1 is provided with an external thread, and the connecting portion 9 is provided with an internal thread, and the connecting portion is fixed to the valve body 1 by a threaded connection.

The utility model also discloses an oxygen cabin, including the cabin body to and foretell oxygen cabin relief valve, the installing port has been seted up to the cabin body, oxygen cabin relief valve set up in the installing port. The utility model discloses an oxygen cabin is when using the in-process that steps up in the cabin body, the relief valve 4 butt shutoff of sealing member the gas outlet 12 guarantees the gas tightness, makes the internal atmospheric pressure in cabin stably rises, and can not take place gas leakage. When the air pressure in the cabin body reaches a set value, the cabin interior airflow pushes the valve rod 2 to overcome the elasticity of the elastic piece 3 to move, the sealing piece 4 opens the air outlet 12, high-pressure airflow is discharged, and pressure relief is achieved. The limiting part 13 limits the moving direction of the valve rod 2 to be along the axis direction of the valve body 1, so that the sealing element 4 always moves in a state of being perpendicular to the axis of the air outlet 12, the sealing effect is ensured, and the sealing element 4 is prevented from being skewed to cause sealing failure. And the reliability and the service life of the oxygen chamber safety valve are further improved, and the use experience is improved.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. An oxygen chamber safety valve comprises a valve body, a valve rod arranged in the valve body and an elastic piece acting on the valve rod, wherein the valve body is provided with an air inlet and an air outlet,

a sealing element is arranged at one end of the valve rod, and the valve rod can move relative to the valve body under the pushing action of the airflow and the elastic element so that the sealing element blocks or opens the air outlet; the valve body is internally provided with a limiting part, and the valve rod can be matched with the limiting part so that the sealing element moves along the axial direction of the valve body.

2. The oxygen tank safety valve of claim 1,

the limiting portion comprises a separating rib arranged inside the valve body, a limiting hole is formed in the separating rib, and the valve rod penetrates through the limiting hole and is matched with the stop of the inner wall of the limiting hole.

3. An oxygen chamber safety valve according to claim 2,

the oxygen chamber safety valve further comprises a fixing seat, the fixing seat is sleeved on the periphery of the valve rod, the fixing seat is provided with a matching portion extending along the axis direction of the fixing seat, and the matching portion extends into the limiting hole to be matched with the valve body.

4. An oxygen chamber safety valve according to claim 3,

the valve comprises a valve rod and is characterized in that a valve plate is further arranged at one end of the valve rod, the valve plate is provided with a first fixing portion, the fixing seat is provided with a second fixing portion, the first fixing portion and the second fixing portion are arranged at intervals in the axial direction of the valve rod, and the first fixing portion and the second fixing portion are clamped and fixed to the sealing element.

5. The oxygen tank safety valve of claim 1,

the oxygen chamber safety valve further comprises a silencing cover, the silencing cover is arranged at one end, provided with the air inlet, of the valve body, the silencing cover is provided with a containing cavity, a silencing piece is arranged in the containing cavity, and a throttling groove is formed in the side wall of the silencing cover.

6. An oxygen chamber safety valve according to claim 5,

the inner ring rib position is arranged in the silencing cover, the inner ring rib position and the side wall of the silencing cover are matched to form the accommodating cavity, the inner ring rib position is provided with a matching region and an avoiding region along the circumferential direction, the matching region is matched and fixed with the valve body, the avoiding region is matched with the valve body to form a throttling gap, and the throttling gap and the throttling groove are arranged in a staggered mode along the radial direction of the silencing cover.

7. An oxygen chamber safety valve according to claim 1 or 6,

the valve body is internally provided with an air flow channel communicated with the air inlet and the air outlet and a separation part arranged in the air flow channel, the separation part is positioned between the air inlet and the air outlet, and the separation part is provided with a plurality of throttling ports.

8. An oxygen chamber safety valve according to claim 1,

the gas outlet is followed the axis direction of valve body has the inlet end and gives vent to anger the end, the gas outlet is in the axis direction of valve body is diameter-changing structure, just the diameter of inlet end is less than the diameter of the end of giving vent to anger, the sealing member can with the inner wall butt of gas outlet is in order to seal the gas outlet.

9. An oxygen chamber safety valve according to claim 1,

the periphery of valve body has still linked firmly connecting portion, connecting portion follow the radial outside extension of valve body is in order to form the welding plane.

10. An oxygen chamber, which comprises a chamber body and is characterized in that,

the oxygen chamber safety valve of any one of claims 1-9, further comprising a mounting opening defined in the body, the oxygen chamber safety valve being disposed in the mounting opening.

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