CN219963788U

CN219963788U - Automatic fireproof device applied to oxygen therapy equipment

Info

Publication number: CN219963788U
Application number: CN202223598765.9U
Authority: CN
Inventors: 刘振; 周明钊; 王亚杰; 庄志
Original assignee: BMC Tianjin Medical Co Ltd
Current assignee: BMC Tianjin Medical Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-11-07
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to an automatic fireproof device applied to oxygen therapy equipment, and relates to the technical field of oxygen therapy. The automatic fireproof device applied to the oxygen therapy equipment comprises the shell and the sealing piece, and the sealing piece is made of a nonmetallic material, so that chemical reactions such as oxidation reaction and the like can not occur even if the sealing piece is contacted with oxygen for a long time, the service life of the automatic fireproof device applied to the oxygen therapy equipment can be prolonged, and the influence on the health of a user is avoided.

Description

Automatic fireproof device applied to oxygen therapy equipment

Technical Field

The utility model relates to the technical field of oxygen therapy, in particular to an automatic fireproof device applied to oxygen therapy equipment.

Background

In a medical or home environment, external oxygen delivery is often required when the patient is unable to meet the demand by self-inhaled oxygen. This method of supplying oxygen to a patient by invasive or non-invasive means by means of an external device is called oxygen therapy. An apparatus for providing oxygen to a patient, collectively referred to as an oxygenerator. Oxygenerators are typically connected by flexible plastic tubing to a respiratory mask or nasal cannula that is worn on the face of a patient in need of ventilation therapy (e.g., oxygen therapy).

Oxygen, as a combustion supporting gas, is highly susceptible to fire if exposed fire (e.g., smoking, etc.) is encountered. Most oxygenerators are configured to continuously deliver oxygen to a respiratory mask or nasal cannula at a rate determined by the needs of the patient and do not cause cessation of oxygen delivery even if the respiratory mask or nasal cannula is removed. In this case, an oxygen-rich environment is easily established around the patient, preparing the surrounding environment for a catastrophic fire based on ignition. The concentration of oxygen output by the oxygenerator is generally higher than 90%, so that once the flexible plastic tube outputting oxygen is ignited carelessly, the flame can be gradually burnt towards the machine body along with the output air tube of oxygen due to continuous high-concentration oxygen flowing out of the flexible plastic tube, and finally the oxygenerator is ignited to generate fire. When the oxygenerator is used in a home care environment, the fire hazard is worsened in the home environment due to the lack of corresponding supervision conditions, and if the oxygen output passage cannot be closed timely, the fire will be more vigorous, so that the fire rescue difficulty is aggravated.

In order to block the output passage of oxygen in case of fire, the prior art generally adopts a mode of providing a fireproof isolation device for blocking. Under normal working conditions, the gas (such as oxygen) flows out through the small hole of the fusible nose piece after surrounding the central hole of the compression spring; in the event of a fire, the fusible nose piece is melted at an elevated temperature, allowing the compression spring to promote the poppet valve closing to block the oxygen output passage. However, the compression springs in such fire-protection isolation devices are generally made of metal materials, and after the compression springs made of metal materials are contacted with oxygen for a long time, chemical reactions such as oxidation and the like inevitably occur in a humid environment, so that the compression springs fail, which greatly reduces the service life of the fire-protection isolation device and affects the health of patients.

Disclosure of Invention

The utility model provides an automatic fireproof device applied to oxygen therapy equipment, which can avoid the occurrence of failure phenomenon when contacting oxygen for a long time, thereby prolonging the service life of the automatic fireproof device.

The utility model provides an automatic fireproof device applied to oxygen therapy equipment, which comprises:

a housing in which a gas passage is provided; and

a seal member provided inside the housing, the seal member being made of an elastic material, the seal member including a seal portion;

when the sealing piece is in a first state, a gap is formed between the sealing part and the air outlet end of the air channel, so that the air channel is opened;

when the sealing piece is in the second state, the sealing part is attached to the air outlet end of the air channel, so that the air channel is closed.

In one embodiment, the sealing member further comprises a first connecting member and a second connecting member respectively provided on the sealing portion, the first connecting member and the second connecting member being respectively fixed on both sides of the gas outlet end of the gas passage,

when the sealing piece is in a first state, the first connecting piece and the second connecting piece are both fixed in the shell and are both in a stretching state, so that a gap is formed between the sealing part and the gas outlet end of the gas channel away from the gas channel;

when the sealing element is in a second state, the first connecting element is fixed in the shell and is in a stretching state, and the second connecting element is disconnected and is in a natural state, so that the sealing part is close to the gas channel and is attached to the gas outlet end of the gas channel.

In one embodiment, the second connector is secured in the housing by a securing structure configured to be fused upon heating above a preset temperature such that the second connector transitions from the stretched state to the natural state.

In one embodiment, the housing is further provided with a mounting arm for mounting the sealing element, and the first connecting element and the second connecting element are respectively and fixedly connected to two ends of the mounting arm;

the second connecting piece is connected with the mounting arm through the fixing structure so as to be fixed in the shell, the fixing structure can be fused after being heated to exceed the preset temperature, so that the second connecting piece is disconnected with the mounting arm, and the second connecting piece is converted into the natural state from the stretching state.

In one embodiment, the first connector is disposed on a side wall of the seal,

the second connecting piece is arranged on one side of the end part of the sealing part, wherein when the first connecting piece and the second connecting piece are both in a natural state, the extending direction of the first connecting piece is perpendicular to the extending direction of the second connecting piece;

when the sealing element is in the first state, the stretching extending directions of the first connecting element and the second connecting element are opposite.

In one embodiment, the first connecting piece and the second connecting piece are respectively arranged at two sides of the sealing part, and the first connecting piece is positioned at one side of the sealing part away from the second connecting piece; when the first connecting piece and the second connecting piece are in a natural state, the first connecting piece and the second connecting piece extend in opposite directions respectively.

In one embodiment, the mounting arm comprises:

the gas channel is penetratingly arranged in the accommodating hole;

the mounting column is arranged on the side wall of the adapter block and is used for being connected with the first connecting piece; and

the connecting plate extends along the axial direction of the accommodating hole, a trigger column is arranged on one side, far away from the adapter block, of the connecting plate, and the trigger column is used for being connected with the second connecting piece;

when the first connecting piece is connected with the mounting column and the second connecting piece is connected with the trigger column, the sealing piece is in a first state in the shell;

the first connector is connected with the mounting post, and the second connector is disconnected with the trigger post, the sealing member is in a second state in the housing.

In one embodiment, the fixing structure comprises a connecting ring at the end of the second connecting piece and the trigger post, and the connecting ring can be matched with the trigger post;

wherein the connection ring and/or the trigger post may be fused when heated above the predetermined temperature.

In one embodiment, the mounting post comprises:

a connection post extending in a radial direction of the receiving hole on a side wall of the adapter block;

the stop round table is arranged on the connecting column; and

the fixing column is arranged at the end part of the stop round table and is used for being connected with the inner wall of the shell, so that the mounting arm is fixed in the shell.

In one embodiment, the first connecting piece is provided with a first connecting hole penetrating through the thickness direction of the first connecting piece, and the inner diameter of the first connecting hole is smaller than the maximum outer diameter of the stop round table.

In one embodiment, the mounting posts are symmetrically arranged on the side wall of the adapter block, the number and the distribution mode of the first connecting pieces are respectively the same as those of the mounting posts, and the number of the first connecting pieces and the number of the mounting posts are at least two.

In one embodiment, the connection plate includes:

the concave part is connected with the side wall of the adapter block at one end and is used for receiving the sealing part; and

the extension plate is connected with the other end of the concave part, the extension plate extends along the axial direction of the accommodating hole, and the trigger post is arranged on one side of the extension plate away from the concave part.

In one embodiment, the housing comprises a first housing and a second housing, wherein a sealed cavity is formed inside the first housing and the second housing after the first housing and the second housing are connected, and the gas channel extends from one side of the inner wall of the cavity;

a first nozzle is arranged on one side of the first shell, and a second nozzle is arranged on one side, opposite to the first shell, of the second shell;

wherein the first nozzle, the gas passage, the chamber, and the second nozzle are in fluid communication when the seal is in a first state;

when the seal is in the second state, fluid entering the gas passage through the first nozzle is isolated from the chamber outside the gas passage.

In one embodiment, a connecting groove is formed in the inner wall of the chamber, and the connecting groove is used for being connected with the fixing column.

In one embodiment, the trigger post is disposed in the chamber or in the second nozzle.

In one embodiment, the first nozzle and the second nozzle are each provided with an anti-drop portion on an outer wall thereof.

In one embodiment, the first housing and the second housing are connected by means of a sealing snap, welding or screw connection.

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

(1) Because the sealing element is made of elastic nonmetallic materials, even if the sealing element is contacted with oxygen for a long time, chemical reactions such as oxidation reaction and the like can not occur, so that the service life of the automatic fireproof device applied to the oxygen therapy equipment can be prolonged, and the influence on the health of a user is avoided.

(2) The parts in the interior of the shell are fewer, and the structure is simple, so that the automatic fireproof device applied to the oxygen therapy equipment has more stable performance.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

FIG. 1 is a schematic view of a prior art fire protection barrier;

fig. 2 is a schematic perspective view of an automatic fire prevention device applied to an oxygen therapy equipment in embodiment 1 of the present utility model;

fig. 3 is a perspective cross-sectional view of the automatic fire protection device shown in fig. 2, showing the seal in a first state, with the trigger post and attachment ring connected in the chamber;

fig. 4 is a cross-sectional view of the automatic fire protection device shown in fig. 2;

FIG. 5 is a schematic perspective view of the seal shown in FIG. 3, wherein the seal is in an unstretched condition;

FIG. 6 is a schematic perspective view of the seal shown in FIG. 3, wherein the seal is in a stretched state;

FIG. 7 is a schematic perspective view of the mounting arm shown in FIG. 6;

FIG. 8 is a schematic view of the seal of FIG. 3 mounted on a mounting arm after it has been stretched;

fig. 9 is a perspective cross-sectional view of the automatic fire protection device shown in fig. 2, showing the seal in a second state;

fig. 10 is a perspective cross-sectional view of an automatic fire protection device applied to an oxygen therapy equipment in embodiment 2 of the present utility model, in which a trigger post and a connection ring are shown connected in a second nozzle.

Reference numerals:

in fig. 1:

10. a housing; 12. an end seat; 13. a fusible nose piece; 14. a poppet valve; 15. a compression spring; 16. an inlet; 17. a central bore; 18. a small hole; 19. an outlet port; 21. a larger diameter hole; 22. an inclined portion; 24. a flange;

fig. 2-10:

100. a housing;

110. a first housing; 120. a second housing; 130. a chamber; 140. a gas channel; 150. a connecting groove;

111. a first nozzle; 112. a first anti-drop portion; 121. a second nozzle; 122. a second anti-drop portion;

30. a seal ring;

40. a seal;

41. a sealing part; 42. a first connector; 43. a second connector;

421. a first connection hole; 431. a connecting ring; 432. a second connection hole;

50. a mounting arm;

51. a transfer block; 52. a mounting column; 53. a connecting plate;

511. a receiving hole; 521. a connecting column; 522. stopping the round table; 523. fixing the column; 531. a recessed portion; 532. an extension plate; 533. triggering the post.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

A fire protection barrier is disclosed in the prior art, for example US4887631a, as shown in fig. 1, for blocking the output passage of oxygen in the event of a fire. The fire protection barrier includes a housing 10, an end seat 12, a fusible nose piece 13, a poppet valve 14, and a compression spring 15. Wherein the housing 10, the end seat 12, the poppet 14 may be made of 316L stainless steel, the compression spring 15 may be made of a metallic material, and the fusible nose piece 13 may be made of a thermoplastic, such as a polyetheretherketone thermoplastic. Under normal operation, fluid passes through poppet 14 in inlet 16 through central bore 17 around compression spring 15 and out port 19 through orifice 18 in fusible nose 13. The compression spring 15 rests against the shoulder 23. The fusible nose piece 13 is tightly positioned in the outer end inner diameter 20 of the end seat 12, bearing up against a flange 24 on the end face end seat 12, which flange 24 is integral with the fusible nose piece 13 and has the same inner diameter as the fusible nose piece 13. The end seat 12 has a larger diameter bore 21 at its inner end through which fluid normally flows to the orifice 18 and outlet port 19. This device is designed to be operated for about 15 minutes at an elevated temperature of about 2000 degrees celsius.

Under normal operating conditions, gas (e.g., oxygen) flows out through the small aperture 18 of the fusible nose piece 13 after surrounding the central aperture 17 of the compression spring 15; in the event of a fire, the fusible nose piece 13 will melt when 700 degrees are reached, so the fusible nose piece 13 will collapse into a larger diameter bore 21 and the poppet 14 will abut the inclined portion 22 of the end seat 12. The poppet valve 14, which is loaded by the compression spring 15, is thereby allowed to close, thereby preventing leakage of liquid through any additional components. Since the compression spring 15 is made of a metal material, the compression spring 15 of the metal material inevitably undergoes chemical reactions such as oxidation and the like to cause the failure of the compression spring 15 after contacting oxygen for a long time, particularly in a humid environment, which greatly reduces the service life of the fireproof isolation device and affects the health of patients.

In view of the problems in the prior art, the present utility model provides an automatic fire protection device applied to oxygen therapy equipment, which can avoid the occurrence of failure phenomenon when contacting oxygen for a long time, so as to improve the service life of the automatic fire protection device.

Example 1

As shown in fig. 2 to 9, the present utility model provides an automatic fire prevention device applied to an oxygen therapy apparatus, including a housing 100 and a sealing member 40 provided inside the housing 100. The housing 100 is provided with a gas channel 140, one end of the gas channel 140 is an air outlet end, and the gas channel 140 can allow gas to pass through.

Specifically, the sealing member 40 includes a sealing portion 41, wherein when the sealing member 40 is in the first state (as shown in fig. 3), a gap is provided between the sealing portion 41 and the gas outlet end of the gas channel 140, so that the gas channel 140 is opened; in the second state (as shown in fig. 9), the sealing part 41 is bonded to the gas outlet end of the gas channel 140 to seal the gas channel 140.

Further, referring to fig. 5 and 6, and referring to fig. 4, the sealing member 40 further includes a first connecting member 42 and a second connecting member 43 respectively disposed on the sealing portion 41, the first connecting member 42 and the second connecting member 43 are respectively fixed on two sides of the gas outlet end of the gas channel 140, in other words, the first connecting member 42 is located on the upstream side of the gas channel 140, and the second connecting member 43 is located on the downstream side of the gas channel 140. Wherein, when the sealing member 40 is in the first state, the first connecting member 42 and the second connecting member 43 are both fixed in the housing 100 and are both in a stretched state (as shown in fig. 6), so that the sealing portion 41 is far away from the gas channel 140 to form a gap with the gas outlet end of the gas channel 140. As shown in fig. 4, at this time, the sealing part 41 is spaced apart from the gas outlet end of the gas channel 140, so that the gas in the gas channel 140 can flow out from the gas outlet end thereof. The state at this time corresponds to a state in which the automatic fire prevention device applied to the oxygen therapy equipment of the present utility model is in the absence of an unexpected event (e.g., fire, etc.).

Conversely, when the sealing member 40 is in the second state, the first connecting member 42 is fixed in the housing 100 and is in a stretched state (as shown in fig. 9), and the second connecting member 43 is disconnected and is in a natural state, so that the sealing portion 41 is close to the gas channel 140 and is attached to the gas outlet end of the gas channel 140. As shown in fig. 9, at this time, the original fixing position of the second connecting member 43 is broken, so that the second connecting member 43 loses constraint, and the sealing portion 41 is pulled to be closely attached to the gas outlet end of the gas channel 140 under the action of the tensile force of the first connecting member 42, so that the gas in the gas channel 140 cannot flow out from the gas outlet end thereof. The state at this time corresponds to a state in which the automatic fire prevention device applied to the oxygen therapy equipment of the present utility model is in the event of an unexpected event (e.g., fire, etc.).

Therefore, when no fire occurs, the sealing portion 41 is not in contact with the gas channel 140, and the gas can flow from the gas inlet end to the gas outlet end of the gas channel 140 and flow out from the gas outlet end, and can reach the mouth and nose of the user through the delivery of the housing 100, so that the gas such as oxygen can be normally supplied to the user (as shown by the solid arrows in fig. 3, the flow direction of the gas); on the contrary, when a fire occurs, the sealing portion 41 is tightly attached to the air outlet end of the air channel 140, so that the air channel 140 is closed, thereby blocking the oxygen transmission path and ensuring the safety of the user.

In a preferred embodiment, the seal 40 is made of an elastic nonmetallic material, preferably a silicone material, so that the seal 40 is elastic to be stretched and can avoid the problem of oxidation reaction occurring in contact with oxygen in the housing for a long time, thereby affecting the life of the product and the reliability of the product. Because the gas (e.g., oxygen) flowing out through the gas outlet end of the gas channel 140 surrounds the sealing member 40 during the gas delivery process, the sealing member 40 is in contact with the oxygen for a long time, and the sealing member 40 made of the silica gel material can avoid chemical reactions such as oxidation reaction, thereby prolonging the service life of the automatic fireproof device applied to the oxygen therapy equipment and avoiding the influence on the health of the user.

The second connection member 43 is fixed in the housing 100 by a fixing structure configured such that it can be fused after being heated above a preset temperature, so that the second connection member 43 is converted from a stretched state to a natural state.

In the event of a fire, the flame will burn progressively in the direction of the oxygen source, as indicated by the dashed arrow in fig. 3, which is the direction of ignition of the flame. Since the second connecting member 43 is located at the downstream side of the gas channel 140, the flame burns the fixing structure first, when the fixing structure is fused after being heated above a preset temperature, the second connecting member 43 loses the fixing constraint, so that the second connecting member 43 can be converted from a stretched state to a natural state, and at this time, since the first connecting member 42 is still fixed in the housing 100 and is in the stretched state, the first connecting member 42 can pull the sealing portion 41 to move so as to be closely attached to the gas outlet end of the gas channel 140, so that the gas channel 140 is closed, and the oxygen transmission path is blocked to ensure the safety of use. The specific shape and structure of the sealing portion 41 may be specifically set according to the ventilation cross-sectional shape of the gas passage 140 to be fitted and sealed, and thus the present utility model is not limited to the specific shape and structure of the sealing portion 41. Illustratively, the present utility model provides a preferred construction, as shown in fig. 5, in which the sealing portion 41 may be configured as a disk, and one side thereof is a sealing surface that may contact the gas outlet end of the gas channel 140, so that the sealing surface has an area at least greater than that of the gas outlet end of the gas channel 140, so that the sealing surface may completely cover the gas outlet end of the gas channel 140 when the two contact each other, to avoid gas leakage.

The number of first connectors 42 may be at least 2. Fig. 5 shows an embodiment in which 4 first connection members 42 are provided, wherein the 4 first connection members 42 are provided on the side wall of the sealing portion 41 at equal intervals (for example, may be provided on the circumferential side wall of the sealing portion 41). When the first connecting member 42 is not stretched and is in a natural state, i.e., in a state shown in fig. 5, the first connecting member 42 extends in the radial direction of the sealing portion 41, and when the first connecting member 42 is stretched, i.e., in a state shown in fig. 6, the first connecting member 42 extends in the axial direction of the sealing portion 41. Therefore, when both the first and second connection members 42 and 43 are in the natural state, the extending direction of the first connection member 42 is perpendicular to the extending direction of the second connection member 43.

By providing the first connecting piece 42 on the side wall of the sealing portion 41, installation and shaping can be facilitated.

With continued reference to fig. 5, the second connecting member 43 is disposed at one side of the end of the sealing portion 41, the first connecting member 42 and the second connecting member 43 are disposed at two sides of the sealing portion 41, respectively, and the first connecting member 42 is disposed at one side of the sealing portion 41 away from the second connecting member 43.

Wherein, when the sealing member 40 is in the first state, the stretching extending directions of the first connecting member 42 and the second connecting member 43 are opposite, i.e., the second connecting member 4 extends in the axial direction of the sealing portion 41 in a direction opposite to the extending direction of the stretched first connecting member 42. That is, the first and second connection members 42 and 43 can be stretched in opposite directions, so that the first and second connection members 42 and 43 can be fixed at both sides of the gas passage 140.

It is conceivable that the first connection member 42 is also provided directly on one side of the sealing portion 41 and the second connection member 43 is provided on the other side of the sealing portion 41, and that both the first connection member 42 and the second connection member 43 extend in opposite directions in the axial direction of the sealing portion 41 when both are in the natural state.

The first and second connection members 42 and 43 function to apply a pulling force thereto on both sides of the sealing part 41, respectively, and thus, when a fire does not occur, the sealing part 41 can be maintained at a position spaced apart from the gas outlet end of the gas passage 140 so as to facilitate the delivery of gas; when a fire occurs, the tensile force on one side of the sealing portion 41 is eliminated, and the sealing portion is attached to the gas outlet end of the gas channel 140 under the tensile force on the other side, thereby blocking the gas channel 140. Therefore, the first connector 42 and the second connector 43 of the present utility model may have other configurations as long as opposite tensile forces can be provided to both sides of the sealing portion 41.

Further, referring to fig. 4 and 7, a mounting arm 50 for mounting the seal 40 is further provided in the housing 100, and the mounting arm 50 includes a joint block 51, a mounting post 52, and a connection plate 53.

The adapter block 51 is constructed in a column-like structure, a through-receiving hole 511 is provided in the adapter block 51, and the gas passage 140 is penetratingly provided in the receiving hole 511. It can be appreciated that the gas outlet end of the gas passage 140 is located at the outer end of the accommodation hole 511 (as shown in fig. 4 and 7).

A mounting post 52 is provided on a side wall of the adapter block 51 (e.g., may be provided on a circumferential side wall of the adapter block 51), the mounting post 52 being for connection to the first connector 42. The number and distribution of the first connecting members 42 are the same as the number and distribution of the mounting posts 52, respectively, that is, they are disposed in one-to-one correspondence. Fig. 7 shows an embodiment provided with 4 mounting posts 52, wherein the 4 mounting posts 52 are equally spaced on the side wall of the adapter block 51. As shown in fig. 8, 4 first connectors 42 are respectively connected to corresponding 4 mounting posts 52.

The connection plate 53 extends along the axial direction of the accommodating hole 511, and a trigger post 533 is provided on the connection plate 53 at a side away from the adapter block 51, the trigger post 533 being adapted to be connected to the second connection member 43. Wherein, when the first connector 42 is connected to the mounting post 52 and the second connector 43 is connected to the trigger post 533, the seal 40 is in the first state within the housing 100; when the first connector 42 is connected to the mounting post 52 and the second connector 43 is disconnected from the trigger post 533, the seal 40 is in the second state in the housing 100.

As shown in fig. 5 and 6, the above-described fixing structure for fixing the second connection member 43 in the housing 100 includes the connection ring 431 provided at the end of the second connection member 43 and the trigger post 533 on the connection plate 53, and the connection ring 431 may be engaged with the trigger post 533. More specifically, referring to fig. 6 and 8, the second connection hole 432 of the connection ring 431 is sleeved on the trigger post 533, so that the second connection member 43 is fixed to one end of the mounting arm 50 (as shown in fig. 8).

As shown in fig. 7, the end of the trigger post 533 has a truncated cone structure, so that the second connection hole 432 may be sleeved on the trigger post 533 when the second connection hole is deformed by stretching to increase its diameter; and then its diameter is restored, it will not fall off the trigger post 533 under the barrier of the truncated cone structure at the end of the trigger post 533.

In addition, the second connection hole 432 of the connection ring 431 and the trigger post 533 of the truncated cone structure have reduced size, so that they are easily fused, thereby improving the trigger speed of the automatic fire protection device applied to the oxygen therapy apparatus.

Wherein the connection ring 431 and/or the trigger post 533 may be fused (blown) at a high temperature above a predetermined temperature. In the event of a fire, the high temperature gas or the burning flame first propagates to the location of the connection ring 431 and/or the trigger post 533, the connection ring 431 or the trigger post 533 is fused, or both are fused, so that the fixing of the second connection member 43 to the mounting arm 50 is broken, and the second connection member 43 is unconstrained to retract as shown in fig. 9. The sealing part 41 can leave the air outlet end of the air channel 140 under the stretching action of the second connecting piece 43, when the pulling force on the second connecting piece 43 disappears and the second connecting piece starts to retract from the original stretching state, the sealing part 41 can be pulled to be tightly attached to the air outlet end of the air channel 140 due to the stretching action of the first connecting piece 42, and the air channel 140 is blocked by the sealing part 41, so that high-temperature air or burnt air cannot continuously pass through the air channel 140, and the safety of a user is ensured.

It is contemplated that the material of the connection ring 431 may be different from the material of other portions of the second connecting member 43, for example, the connection ring 431 may be made of a material with lower heat resistance, and the material of other portions of the second connecting member 43 may be made of a material with higher heat resistance, so that the connection ring 431 is more easily fused.

In addition, trigger post 533 may be similarly configured. For example, the material of the trigger post 533 is different from the material of the other parts of the connection plate 53, so that the material of the trigger post 533 is less resistant to high temperature, and the material of the other parts of the connection plate 53 is more resistant to high temperature, so that the trigger post 533 is more easily fused.

It should be noted that the preset temperature is generally 400 ℃ and above.

As shown in fig. 7, the mounting post 52 includes a connection post 521, a stopper boss 522, and a fixing post 523. The connecting post 521 extends on the side wall of the adapter piece 51 in the radial direction of the receiving hole 511, a stop boss 522 is provided on the connecting post 521, the maximum outer diameter of the stop boss 522 is larger than the outer diameter of the connecting post 521, and the stop boss 522 tapers in diameter in a direction away from the adapter piece 51. A fixing post 523 is provided at an end of the stopper boss 522 for coupling with an inner wall of the housing 100, thereby fixing the mounting arm 50 in the housing 100.

Referring to fig. 5 and 6, the first connecting member 42 is provided with a first connecting hole 421 penetrating through the thickness direction thereof, and an inner diameter of the first connecting hole 421 is smaller than a maximum outer diameter of the stop boss 522. Therefore, when the first connecting piece 42 is stretched, the diameter of the first connecting hole 421 is increased, so that the first connecting piece can pass through the corresponding stop round table 522 and be sleeved on the connecting column 521; and then the diameter thereof is restored, the first coupling hole 421 cannot be removed from the coupling post 521 due to the blocking action of the stopping boss 522, thereby fixing the first coupling member 42 to the other end of the mounting arm 50.

Further, with continued reference to fig. 7 and 8, the connection plate 53 includes a recess 531 and an extension plate 532. As shown in fig. 7, one end of the recess 531 is connected to a side wall of the adapter block 51, and the recess 531 is for receiving the sealing portion 41. As shown in fig. 8, when the second connector 43 is stretched and fixed to the mounting arm 50, the sealing portion 41 is positioned in the recessed portion 531 with its sealing surface disposed opposite the end of the adapter block 51.

The extension plate 532 is connected to the other end of the recess 531, the extension plate 532 extends along the axial direction of the accommodating hole 511, and the trigger post 533 is disposed on a side of the extension plate 532 away from the recess 531, for example, an upper side thereof, and the trigger post 533 may be substantially perpendicular to the extension plate 532. The second connector 43 is substantially parallel to the extension plate 532 when stretched.

As shown in fig. 3 and 4, the housing 100 includes a first housing 110 and a second housing 120, and the first housing 110 and the second housing 120 are coupled to each other to form a sealed chamber 130 therein, and a gas passage 140 extends from one side within the chamber 130. The seal 40 and the mounting arm 50 are both disposed in the chamber 130.

One side of the first housing 110 is provided with a first nozzle 111 for connection to a duct (not shown), the first nozzle 111 being connected to an oxygen source such as an oxygenerator through the duct; the second housing 120 is provided with a second nozzle 121 on a side opposite to the first housing 110 for connection to a conduit (not shown), the second nozzle 121 being connected to a respiratory mask worn on the face of the patient through the conduit. Wherein the first nozzle 111, the gas channel 140, the chamber 130, and the second nozzle 121 are in fluid communication when the seal 40 is in the first state; when the seal 40 is in the second state, fluid entering the gas channel 140 through the first nozzle 111 is isolated from the chamber 130 outside the gas channel 140. Thus, in normal use, oxygen is received from the first nozzle 111, flows through the gas passage 140 and the chamber 130, and then enters the second nozzle 121, and oxygen is provided to the patient by the second nozzle 121, as indicated by the solid arrows in fig. 3.

As shown in fig. 3, the gas passage 140 may extend from the inner wall side of the first housing 110 and communicate with the first nozzle 111. When the sealing member 40 is in the first state, the sealing portion 41 is spaced from the gas outlet end of the gas channel 140, so that the gas can flow out of the gas outlet end of the gas channel 140 into the chamber 130 and into the second nozzle 121. As shown in fig. 9, when the sealing member 40 is in the second state, the sealing portion 41 is attached to the gas outlet end of the gas channel 140, so that the gas cannot flow out of the gas outlet end of the gas channel 140, and cannot naturally flow into the second nozzle 121.

Thus, in an embodiment of the present utility model, the gas channel 140 includes an inlet end and an outlet end, and the first nozzle 111 communicates with the inlet end of the gas channel 140. When the sealing member 40 is in the first state, i.e., the temperature in the housing 100 does not exceed the preset temperature (fusing temperature), the second connecting member 43 of the sealing member 40 maintains a connection with the mounting arm 50, so that a certain gap is maintained between the sealing portion 41 of the sealing member 40 and the air outlet end of the air channel 140, and thus the fluid can flow into the chamber 130 after flowing through the first nozzle 111, the air inlet end of the air channel 140 and the air outlet end of the air channel 140 in sequence, and the fluid is outputted from the second nozzle 121; when the temperature in the housing 100 is higher than the preset temperature, the connection ring 431 of the second connection member or the trigger post 533 of the mounting arm 50 is fused, so that the sealing member 40 is switched from the first state to the second state, that is, the end of the second connection member 43 is disconnected from the corresponding end (trigger post 533) of the mounting arm 50, while the end of the first connection member 42 is kept connected with the corresponding end (fixing post 523) of the mounting arm, the sealing portion 41 of the sealing member 40 moves in the housing 100 in a direction approaching the transfer block 51 under the action of the traction tension of the first connection member 42 until the sealing portion 41 is attached to the corresponding end (i.e., the air outlet end face of the air channel 140) of the transfer block 51, and at this time, the fluid can enter the air channel 140 through the air inlet end of the first nozzle 111 and the air inlet end of the air channel 140, but the air outlet end of the air channel 140 cannot flow out from the air outlet end of the air channel 140 due to the attaching sealing effect of the sealing portion 41; meanwhile, due to the bonding and sealing effect of the sealing part 41, the burnt gas cannot spread to the oxygen therapy equipment through the gas channel 140, so that the fire accident caused by the initiation or increase of the fire around the oxygen therapy equipment can be prevented from being promoted, and the automatic fireproof function of the oxygen therapy equipment is realized.

As shown in fig. 3 and 4, a connection groove 150 is provided on the inner wall of the chamber 130, and the connection groove 150 is used to connect with the fixing post 523. The connection groove 150 may be defined by an inner wall of the first housing 110 and an end of the second housing 120 so that the mounting arm 50 may be fixed in the chamber 130.

In this embodiment, trigger post 533 and connecting ring 431 are disposed in chamber 130. More specifically, trigger post 533 and connecting ring 431 are disposed in chamber 130 proximate to second nozzle 121 such that combusted gases propagating from second nozzle 121 are able to initially fuse trigger post 533 and/or connecting ring 431.

As shown in fig. 2, the outer walls of the first nozzle 111 and the second nozzle 121 are each provided with a drop-preventing portion. Specifically, the first nozzle 111 is provided with a first drop-preventing portion 112 on an outer wall thereof, and the second nozzle 121 is provided with a second drop-preventing portion 122 on an outer wall thereof.

In a preferred embodiment, the first escape prevention part 112 may be configured as a tapered step having a diameter gradually increasing in a direction toward the first housing 110, preventing the first nozzle 111 from escaping from the duct after being coupled to the duct. In addition, the second drop-preventing portion 122 may have a similar structure to the first drop-preventing portion 112, that is, it is also a tapered step having a diameter gradually increasing in a direction toward the second housing 120, so as to prevent the second nozzle 121 from being dropped out of the duct after being connected to the duct.

It is conceivable that the first escape prevention part 112 may also be configured as a spiral protrusion spirally provided on the outer wall of the first nozzle 111 in the axial direction of the first nozzle 111 to play a role of escape prevention.

Alternatively, it is also conceivable that the first drop-preventing portion 112 may be configured such that a plurality of wedge-shaped blocks are provided along the circumferential direction of the first nozzle 111 to function as drop-preventing portions.

The second anti-disengaging portion 122 can have a similar structure to the first anti-disengaging portion 112, and will not be described herein.

The first housing 110 and the second housing 120 are connected by means of sealing snap, welding or screw connection. As shown in fig. 3, the first housing 110 and the second housing 120 are connected by a buckle, and a sealing ring 30 is further disposed at the connection between the two to ensure the tightness of the chamber 130.

Example 2

As shown in fig. 10, this embodiment 2 is a modification of the above embodiment 1. The differences between the present embodiment 2 and the above embodiment 1 will be described below, and the details of the differences will not be repeated.

As shown in fig. 10, the connection plate 53 and the second connection piece 43 each extend into the second nozzle 121 such that the connection ring 431 and the trigger post 533 are located in the second nozzle 121. As described above, in the case of a fire, the flames will burn gradually from the second nozzle 121 toward the oxygen source, so that this arrangement in this embodiment has a faster triggering speed, i.e., the connection ring 431 and/or the trigger post 533 can be fused more quickly in the case of a fire.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. An automatic fire protection device for an oxygen therapy apparatus, comprising:

a housing in which a gas passage is provided; and

2. The automatic fire prevention apparatus for an oxygen therapy device according to claim 1, wherein the sealing member further comprises a first connecting member and a second connecting member respectively provided on the sealing portion, the first connecting member and the second connecting member being respectively fixed to both sides of the gas outlet end of the gas passage,

3. The automatic fire protection device for an oxygen therapy apparatus according to claim 2, wherein the second connection member is fixed in the housing by a fixing structure configured to be fused when heated above a preset temperature, so that the second connection member is converted from the stretched state to the natural state.

4. The automatic fire prevention device applied to an oxygen therapy apparatus according to claim 3, wherein a mounting arm for mounting the sealing member is further provided in the housing, and the first and second connection members are fixedly connected to both ends of the mounting arm, respectively;

5. The automatic fire prevention device applied to an oxygen therapy equipment according to any one of claims 2 to 4, wherein the first connection member is provided on a side wall of the sealing portion, and the second connection member is provided on an end side of the sealing portion, wherein an extending direction of the first connection member is perpendicular to an extending direction of the second connection member when the first connection member and the second connection member are both in a natural state;

6. The automatic fire protection device for an oxygen therapy apparatus according to any one of claims 2 to 4, wherein the first and second connectors are disposed on respective sides of the sealing portion, and the first connector is located on a side of the sealing portion away from the second connector; when the first connecting piece and the second connecting piece are in a natural state, the first connecting piece and the second connecting piece extend in opposite directions respectively.

7. The automatic fire protection apparatus for use in an oxygen therapy device of claim 4, wherein the mounting arm comprises:

the gas channel is penetratingly arranged in the accommodating hole;

8. The automatic fire protection device for use in an oxygen therapy apparatus according to claim 7, wherein the securing structure includes a connector ring at an end of the second connector and the trigger post, the connector ring being engageable with the trigger post;

9. The automatic fire protection apparatus for use in an oxygen therapy device of claim 8, wherein the mounting post comprises:

the stop round table is arranged on the connecting column; and

10. The automatic fire prevention device applied to an oxygen therapy apparatus according to claim 9, wherein the first connection member is provided with a first connection hole penetrating through the first connection member in a thickness direction thereof, and an inner diameter of the first connection hole is smaller than a maximum outer diameter of the stopping truncated cone.

11. The automatic fire protection apparatus for an oxygen therapy device according to claim 7, wherein the mounting posts are symmetrically disposed on the side wall of the adapter block, and the number and distribution of the first connection pieces are respectively the same as the number and distribution of the mounting posts, and the number of the first connection pieces and the number of the mounting posts are at least two.

12. The automatic fire protection apparatus for use in an oxygen therapy device of claim 7, wherein the connection plate comprises:

13. The automatic fire protection apparatus for an oxygen therapy device according to claim 9, wherein the housing includes a first housing and a second housing, the first housing and the second housing being connected to each other to form a sealed chamber therein, the gas passage extending from an inner wall side of the chamber;

14. The automatic fire protection apparatus for an oxygen therapy device according to claim 13, wherein a connection groove is provided on an inner wall of the chamber, the connection groove being for connection with the fixing column.

15. An automatic fire protection device for an oxygen therapy apparatus according to claim 13, wherein the trigger post is disposed in the chamber or in the second nozzle.

16. The automatic fire protection apparatus for an oxygen therapy device according to claim 13, wherein the first nozzle and the second nozzle are each provided with a drop-off preventing portion on an outer wall thereof.

17. The automatic fire protection device for use in an oxygen therapy apparatus according to claim 13, wherein the first housing and the second housing are connected by means of a sealing snap, welding or threaded connection.