CN219159636U - Fire prevention valve and oxygenerator - Google Patents

Abstract

The utility model relates to the field of fire valves and oxygenerators and provides a fire valve and an oxygenerator. The fire-proof valve comprises an air inlet cavity, an air outlet cavity, a permanent magnet and a magnetic valve core, wherein the air inlet cavity is in sealing connection with the air outlet cavity to form an accommodating space, the permanent magnet is positioned in the accommodating space, the permanent magnet is fixed on the radial outer side of an air outlet nozzle of the air outlet cavity, the magnetic valve core comprises a head and a rod portion, the head is closer to the air inlet cavity than the permanent magnet, the radial size of the head is larger than the inner diameter of the air outlet nozzle, the rod portion penetrates through the permanent magnet to be inserted into the air outlet nozzle, the fire-proof valve further comprises a inflammable pin, the inflammable pin is inserted into the air outlet nozzle from the outer side of the air outlet nozzle and is abutted to the end portion of the rod portion, and the distance from the permanent magnet to the inflammable pin is shorter than the length of the rod portion. The fire-proof valve can prevent the fire from flowing back, and can prevent the fire, thereby reducing the risk of fire.

Description

Fire prevention valve and oxygenerator

Technical Field

The utility model relates to the field of fire valves and oxygenerators, in particular to a fire valve and an oxygenerator.

Background

In the apparatus for delivering the inflammable gas or the combustion-supporting gas, if the gas outlet of the apparatus fires, the inflammable gas or the combustion-supporting gas delivered by the apparatus may promote fire to cause a fire. For example, an oxygenerator is an apparatus for producing oxygen that physically or chemically processes a gas entering the apparatus to produce oxygen of higher purity. When the oxygenerator works, the concentration of oxygen is higher at the position where the gas outlet nozzle of the oxygenerator is connected with the nasal oxygen tube, and if the temperature near the position is higher to cause combustion, the oxygen is continuously produced due to the working of the oxygenerator, so that the combustion can be further promoted; in addition, the fire also easily flows back into the oxygenerator through the air outlet nozzle of the oxygenerator, which causes damage to the oxygenerator and even causes fire disaster.

In the existing equipment such as an oxygenerator which has a fire risk, an effective means for preventing the fire is not available.

It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present utility model and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the utility model section.

Disclosure of Invention

To solve at least one of the above problems or other similar problems, embodiments of the present utility model provide a fire protection valve and an oxygenerator.

According to a first aspect of an embodiment of the present utility model, there is provided a fire protection valve, the fire protection valve including an air inlet chamber and an air outlet chamber, the air inlet chamber being connected with the air outlet chamber in a sealing manner and forming an accommodation space, the fire protection valve further including a permanent magnet and a magnetic valve core located in the accommodation space, the permanent magnet being fixed to a radially outer side of an air outlet nozzle of the air outlet chamber, the magnetic valve core including a head portion closer to the air inlet chamber than the permanent magnet, a radial dimension of the head portion being larger than an inner diameter of the air outlet nozzle, the stem portion being inserted into the air outlet nozzle through the permanent magnet, the fire protection valve further including a flammable pin inserted into the air outlet nozzle from the outer side of the air outlet nozzle and abutting an end portion of the stem portion, a distance from the permanent magnet to the flammable pin being shorter than a length of the stem portion.

In addition, optionally, a limiting portion is further formed in the accommodating space, and the limiting portion is closer to the air inlet cavity than the head portion of the magnetic valve core.

In addition, optionally, the limit part comprises at least three ribs formed on the inner wall of the air outlet cavity and at least two limit blocks matched with the ribs, and the space between the at least two limit blocks is smaller than the radial dimension of the head part.

In addition, optionally, the pole portion is hollow out construction.

In addition, optionally, the permanent magnet is of an annular structure, and the inner diameter of the permanent magnet is not smaller than the inner diameter of the air outlet nozzle and smaller than the radial dimension of the head.

In addition, optionally, the inflammable pin is formed by connecting a plurality of fan blades, and a structure matched with the inflammable pin is formed on the outer side of the end part of the air outlet nozzle opposite to the air inlet nozzle of the air inlet cavity in the air outlet direction.

In addition, optionally, the inflammable pin and the air outlet nozzle are kept relatively static through friction force, and the friction force is larger than the magnetic force between the permanent magnet and the magnetic valve core.

According to a second aspect of embodiments of the present utility model, there is provided an oxygenerator comprising the fire damper of the embodiment of the first aspect.

One of the beneficial effects of the embodiment of the utility model is that: according to the fireproof valve with the permanent magnet, the magnetic valve core and the inflammable pin, under the condition that a fire occurs near the air outlet nozzle, the inflammable pin is deformed or burnt, the magnetic valve core loses the support of the inflammable pin and moves towards the air outlet nozzle side until being abutted with the air outlet nozzle under the attraction of the magnetic force of the permanent magnet, so that an air flow channel is blocked, the backflow of fire is prevented, and the blocking of air supply through the magnetic valve core realizes flame retardance, so that the risk of fire is reduced.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. The embodiments of the utility model include many variations, modifications and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the utility model may be combined with elements and features shown in one or more other drawings or implementations. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts as used in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a radial cross-sectional view of a fire damper according to an embodiment of the first aspect of the present utility model.

Fig. 2 is an exploded view of the cross-sectional view of the fire protection valve shown in fig. 1.

Fig. 3 is a partial schematic view of a section of the fire damper shown in fig. 1 without the installation of a flammable pin.

Fig. 4 is a perspective view of a combustible pin of a fire damper according to an embodiment of the first aspect of the utility model.

Fig. 5 is a perspective view of the air outlet chamber of the fire damper of the embodiment of the first aspect of the present utility model, looking from the air outlet nozzle toward the air inlet nozzle.

Fig. 6 is a perspective view of the air outlet chamber shown in fig. 5, looking from the air inlet nozzle toward the air outlet nozzle.

Fig. 7 is a cross-sectional view of the air outlet chamber shown in fig. 5.

Fig. 8 is a perspective view of a stopper of a fire damper according to an embodiment of the first aspect of the present utility model.

Fig. 9 is a cross-sectional view of a magnetic valve core of a fire protection valve according to an embodiment of the first aspect of the present utility model.

Fig. 10 is a cross-sectional view of another embodiment of the fire damper of the embodiment of the first aspect of the present utility model, taken along a direction perpendicular to the centerline.

Detailed Description

The foregoing and other features of the utility model will become apparent from the following description, taken in conjunction with the accompanying drawings. In the specification and drawings, there have been specifically disclosed specific embodiments of the utility model that are indicative of some of the ways in which the principles of the utility model may be employed, it being understood that the utility model is not limited to the specific embodiments described, but, on the contrary, the utility model includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present utility model are described below with reference to the accompanying drawings. These embodiments are merely illustrative and not limiting of the utility model.

In the embodiments of the present utility model, the terms "first," "second," "upper," "lower," etc. are used to distinguish between different elements from each other by reference, but do not denote a spatial arrangement or a temporal order of the elements, which should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "comprising," "including," "having," and the like, are intended to reference the presence of stated features, elements, components, or groups of components, but do not preclude the presence or addition of one or more other features, elements, components, or groups of components.

In embodiments of the present utility model, the singular forms "a," an, "and" the "include plural referents and should be construed broadly to mean" one "or" one type "and not limited to" one "or" another; furthermore, the term "comprising" is to be interpreted as including both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "according to" should be understood as "at least partially according to … …", and the term "based on" should be understood as "based at least partially on … …", unless the context clearly indicates otherwise.

In order to more clearly describe the embodiment of the present utility model, in the embodiment of the present utility model, a direction along the air flow passage is referred to as an "axial direction", a direction of a radius centering on a center line of the fire-proof valve along the axial direction is referred to as a "radial direction", one side away from the center line in the radial direction is referred to as a "radial outside", and one side close to the center line in the radial direction is referred to as a "radial inside". Those skilled in the art will appreciate that the above-defined directions or relative positions are merely for easy understanding of the description of the embodiments of the present utility model and should not be construed as limiting the embodiments of the present utility model in practice.

Example of the first aspect

The embodiment of the first aspect of the utility model provides a fire protection valve, which can be applied to any equipment needing fire protection or flame retardation, for example, an oxygenerator, a gas pipeline and the like, and the application field of the fire protection valve is not limited by the embodiment of the utility model.

Fig. 1 is a sectional view of a fire damper according to an embodiment of the first aspect of the present utility model in a direction perpendicular to a center line, fig. 2 is an exploded view of the sectional view of the fire damper shown in fig. 1, and fig. 3 is a partial schematic view of a section of the fire damper shown in fig. 1 without installation of a flammable pin.

As shown in fig. 1, the fire protection valve 1 comprises an air inlet cavity 10, an air outlet cavity 20, a permanent magnet 30, a magnetic valve core 40 and a flammable pin 50, wherein the air inlet cavity 10 is provided with an air inlet nozzle 101, and the air outlet cavity 20 is provided with an air outlet nozzle 201.

As shown in fig. 2, the magnetic valve cartridge 40 includes a head portion 401 and a stem portion 402, and a radial dimension D1 of the head portion 401 is larger than an inner diameter D1 of the outlet nozzle 201.

As shown in fig. 1, the air inlet cavity 10 and the air outlet cavity 20 are connected in a sealing manner and form an accommodating space S, the permanent magnet 30 and the magnetic valve core 40 are located in the accommodating space S, wherein the permanent magnet 30 is fixed on the radial outer side of the air outlet nozzle 201 of the air outlet cavity 20, the head 401 of the magnetic valve core 40 is closer to the air inlet cavity 10 than the permanent magnet 30, the rod 402 penetrates through the permanent magnet 30 to be inserted into the air outlet nozzle 201, the inflammable pin 50 is inserted into the air outlet nozzle 201 from the outer side of the air outlet nozzle 201 and is abutted with the end of the rod 402, and the distance L from the permanent magnet 30 to the inflammable pin 50 is shorter than the length L of the rod 402.

For example, when the fire protection valve 1 according to the embodiment of the present utility model is applied, the air inlet nozzle 101 of the fire protection valve 1 may be connected to a gas manufacturing apparatus, the air outlet nozzle 201 may be connected to a gas utilization party, for example, when the fire protection valve 1 is applied to an oxygenerator, the air inlet nozzle 101 of the fire protection valve 1 may be connected to an air outlet pipe of the oxygenerator, the air outlet nozzle 201 of the fire protection valve 1 may be connected to one end of a nasal oxygen pipe of the oxygenerator, and the other end of the nasal oxygen pipe may be inserted into a nasal cavity of a user, for example. In normal use of fire damper 1, gas flows from inlet nozzle 101 to outlet nozzle 201 in gas flow direction a, as shown in fig. 1. The inflammable pin 50 is installed on the outlet nozzle 201, and the distance L between the permanent magnet 30 and the inflammable pin 50 is shorter than the length L of the rod 402 of the magnetic valve core 40, so that the head 401 of the magnetic valve core 40 is spaced apart from the permanent magnet 30 by a predetermined distance, and thus a gap exists between the magnetic valve core 40 and the outlet nozzle 201. After the gas enters the gas inlet cavity 10 from the gas inlet nozzle 101 and then enters the gas outlet cavity 20, the gas can overflow the fireproof valve from the gas outlet nozzle 201 through the gap between the magnetic valve core 40 and the gas outlet nozzle 201, and the gas flow channel is normal, so that the normal supply of the gas is realized.

In the case where the temperature in the vicinity of the outlet nozzle 201 increases, for example, the vicinity of the outlet nozzle 201 fires, the inflammable pin 50 burns or deforms by heating, and as shown in fig. 3, the head 401 of the magnetic valve 40 moves in the direction of the permanent magnet 30 until abutting against the permanent magnet 30 by the magnetic force with the permanent magnet 30 without the support of the inflammable pin 50. Since the radial dimension D1 of the head 401 is larger than the inner diameter D1 of the air outlet nozzle 201, the air outlet nozzle 201 is blocked by the head 401, the fire cannot flow back through the air outlet nozzle 201, and in addition, since the air flow passage is blocked, the air cannot flow out of the air outlet nozzle 201, and further combustion can be prevented.

In some embodiments, the combustible pin 50 and the air outlet nozzle 201 are held relatively stationary by friction, and the friction between the combustible pin 50 and the air outlet nozzle 201 is greater than the magnetic force between the permanent magnet 30 and the magnetic valve core 40. This ensures that a sufficient supporting force is provided to the magnetic valve element 40, and prevents loosening of the flammable pin 50 due to disturbance by external factors. The friction force is greater than the magnetic force by a predetermined threshold, e.g., the friction force is four times the magnetic force. The embodiment of the utility model does not limit the friction force, the magnetic force and the preset threshold value, and can be designed according to actual conditions.

In addition, the flammable pin 50 and the air outlet nozzle 201 may be bonded together, so that the magnetic valve core 40 is supported by the adhesive force and the friction force between the flammable pin 50 and the air outlet nozzle 201.

Fig. 4 is a perspective view of a flammable pin of the fire damper according to the embodiment of the first aspect of the present utility model, and fig. 5 is a perspective view of the air outlet chamber of the fire damper according to the embodiment of the first aspect of the present utility model, as viewed from the air outlet nozzle toward the air inlet nozzle.

In some embodiments, as shown in fig. 4, the inflammable pin 50 is formed by connecting a plurality of blades 501, as shown in fig. 5, the outer side of the air outlet nozzle 201 is formed with a structure matching with the inflammable pin 50, specifically, the outer side of the end 201a of the air outlet nozzle 201 opposite to the air inlet nozzle 101 (not shown in fig. 5) is formed with a structure of the blades 501 embedded with the inflammable pin 50. For example, as shown in fig. 4, the inflammable pin 50 is formed by connecting 3 blades 501, and as shown in fig. 5, 3 grooves 201b respectively fitted into the 3 blades are formed on the outer side of the end 201 a. In addition, since the connection portion between the blades 501 is small, the connection portion is easily collapsed when the inflammable pin 50 burns, thereby rapidly triggering the magnetic structure and improving the sensitivity of the fire damper 1. In addition, since there is a gap between the blades 501, the combustible pin 50 is fitted into the groove 201b of the outlet nozzle 201, and thus the air flow passage is not blocked.

Although the combustible pin 50 is described above as being constituted by 3 blades, the embodiment of the present utility model is not limited thereto, and the combustible pin 50 may be constituted by other number of blades, which is not limited thereto. In addition, the combustible pin 50 may have other structures as long as it can be fixed to the outlet nozzle 201 and does not block the air flow passage, and the specific structure of the combustible pin 50 is not limited in the embodiment of the present utility model.

In addition, the combustible pin 50 of the embodiment of the present utility model may be formed of a combustible material, and the embodiment of the present utility model is not limited thereto, and reference may be made to the related art.

In some embodiments, the gas inlet chamber 10 and the gas outlet chamber 20 are non-flammable, for example, the gas inlet chamber 10 and the gas outlet chamber 20 may be formed of a metallic material such as copper. Therefore, the fireproof valve provided by the embodiment of the utility model can be reused only by replacing inflammable pins, and the use cost is low.

In addition, as shown in fig. 1, the air inlet cavity 10 is a conical cavity, so that the air passage is widened while the pressure is released, the influence of air resistance caused by the magnetic valve core 40 in the middle of the air passage is reduced, and the normal air supply is ensured. In addition, as shown in fig. 1, the outer circumferential surface of the air inlet nozzle 101 may be designed as a reverse buckle, thereby facilitating the installation and fixation of the air supply pipe.

In some embodiments, as shown in fig. 1, a limiting portion 60 is also formed in the accommodation space S, and the limiting portion 60 is closer to the intake chamber 10 than the head portion 401 of the magnetic core 40.

Fig. 6 is a perspective view of the air outlet chamber shown in fig. 5, as viewed from the direction of the air inlet nozzle toward the air outlet nozzle, and fig. 7 is a sectional view of the air outlet chamber shown in fig. 5.

In some embodiments, as shown in fig. 6 and 7, the stopper 60 includes ribs 601 formed on the inner wall 20a of the outlet chamber 20, and the number of the ribs 601 is at least three, for example, as shown in fig. 6, the inner wall 20a of the outlet chamber 20 is formed with four ribs 601.

As shown in fig. 2, the limiting part 60 further includes limiting blocks 602 that cooperate with the rib 601, and the number of limiting blocks 602 is at least two.

Fig. 8 is a perspective view of a stopper of a fire damper according to an embodiment of the first aspect of the present utility model.

As shown in fig. 8, the stopper 602 is, for example, L-shaped, and is formed of a first portion 621 extending in a first direction x and a second portion 622 extending in a second direction y perpendicular to the first direction x, and a groove 622a extending in the second direction y is formed in the second portion 622. The rib 601 may be inserted into the groove 622a, for example, so that the stopper 602 may be fixed to the rib 601 as shown in fig. 1.

In addition, as shown in fig. 2, the distance d2 between the at least two stoppers 602 is smaller than the radial dimension of the head 401, thereby preventing the head 401 from coming out of the range of mutual attraction with the permanent magnet 30 and causing the head 401 to be unable to be normally triggered to move toward the permanent magnet 30. In addition, as shown in fig. 2, the distance d2 is, for example, a distance between the first portions 621 of the stopper blocks 602.

In addition, the shape of the stopper 602 is not limited in the embodiment of the present utility model, and the stopper 602 may have other shapes as long as the head 401 is prevented from falling out of the range of attracting the permanent magnet 30.

Fig. 9 is a cross-sectional view of a magnetic valve core of a fire protection valve according to an embodiment of the first aspect of the present utility model.

In some embodiments, as shown in fig. 9, the stem 402 of the magnetic valve core 40 is hollow. Therefore, when the rod 402 is inserted into the air outlet nozzle 201, the hollow structure can increase the fluidity of the pipeline gas and reduce the air resistance. In addition, as shown in fig. 9, the cross section of the magnetic valve core 40 is T-shaped, that is, the radial dimension of the head 401 is large, so that the contact area between the head 401 and the permanent magnet 30 is large, the air path can be better sealed, the effect of blocking the supply of the gas (such as oxygen) is achieved, and the combustion is favorably blocked.

In some embodiments, permanent magnet 30 is, for example, an annular structure, for example, annular permanent magnet 30 is affixed radially outward of outlet nozzle 201. The inner diameter of the permanent magnet 30 is greater than or equal to the inner diameter of the outlet nozzle 201, thereby avoiding the permanent magnet 30 blocking the air flow passage of the outlet nozzle 201, and the inner diameter of the permanent magnet 30 is smaller than the radial dimension of the head 401, thereby blocking the air passage of the outlet nozzle 201 by the contact of the permanent magnet 30 with the head 401.

In addition, a sealing ring may be attached to the surface of the permanent magnet 30 facing the head 401, so that the head 401 and the permanent magnet 30 can be closely attached to each other when the head 401 and the permanent magnet 30 are in contact with each other, thereby preventing air leakage.

Fig. 10 is a cross-sectional view of another embodiment of the fire damper of the embodiment of the first aspect of the present utility model, taken along a direction perpendicular to the centerline.

The fire damper 7 of another embodiment will be described below by taking fig. 10 as an example, in which the embodiments of the components having the same component names in the fire damper 7 and the fire damper 1 are the same or similar, and reference is made to the above description for the embodiments of the components in the fire damper 7, and the description will not be repeated except for the specific description.

In addition, for the fire protection valve of the embodiment of the present utility model, the components in the fire protection valve 1 and the components in the fire protection valve 7 may be appropriately combined and/or deformed to form the fire protection valve of other embodiments, and those skilled in the art will understand that the fire protection valve obtained by these appropriate combinations and/or deformations is also within the protection scope of the present utility model.

As shown in fig. 10, the fire protection valve 7 includes an air inlet chamber 71, an air outlet chamber 72, a permanent magnet 73, a magnetic valve core 74 and a flammable pin 75, wherein the air inlet chamber 71 has an air inlet nozzle 711, the air outlet chamber 72 has an air outlet nozzle 721, the air inlet chamber 71 is hermetically connected with the air outlet chamber 72 and forms an accommodating space S ', and the permanent magnet 73 and the magnetic valve core 74 are located in the accommodating space S'.

As shown in fig. 10, the magnetic valve element 74 includes a head 741 and a stem 742, the permanent magnet 73 is fixed to the radially outer side of the air outlet nozzle 721 of the air outlet chamber 72, the head 741 is closer to the air inlet chamber 71 than the permanent magnet 73, the stem 742 is inserted into the air outlet nozzle 721 through the permanent magnet 73, the combustible pin 75 is inserted into the air outlet nozzle 721 from the outer side of the air outlet nozzle 721, and the distance L 'from the permanent magnet 73 to the combustible pin 75 is shorter than the length L' of the stem 742 in abutment with the end of the stem 742.

In some embodiments, as shown in fig. 10, a stopper 76 is also formed in the accommodation space S', and the stopper 76 is located closer to the intake chamber 71 than the head 741 of the magnetic spool 74. The limiting portion 76 may be fixed to the inner wall of the air intake chamber 71 by, for example, snap-fit, or may be fixed to the inner wall of the air intake chamber 71 by adhesion, and the fixing manner of the limiting portion 76 is not limited in the embodiment of the present utility model. The stopper 76 may be elongated or may be otherwise shaped, and the shape of the stopper 76 is not limited in the embodiment of the present utility model, as long as the head 741 is prevented from coming out of the range where the head 741 attracts the permanent magnet 73.

In some embodiments, the combustible pin 75 and the air outlet nozzle 721 may be held relatively stationary by friction, e.g., the friction between the combustible pin 75 and the air outlet nozzle 721 is greater than the magnetic force between the permanent magnet 73 and the magnetic valve core 74. This ensures that a sufficient supporting force is provided to the magnetic valve element 74, and prevents loosening of the inflammable pin 75 due to disturbance by external factors. The friction force is greater than the magnetic force by a predetermined threshold, e.g., the friction force is four times the magnetic force. The embodiment of the utility model does not limit the friction force, the magnetic force and the preset threshold value, and can be designed according to actual conditions.

In addition, as shown in fig. 10, the inflammable pin 75 may be fitted or engaged in the inner wall of the air outlet nozzle 721, or the inflammable pin 75 may be adhesively fixed in the inner wall of the air outlet nozzle 721, thereby ensuring sufficient supporting force for the magnetic valve element 74.

In addition, as shown in fig. 10, the cross-sectional shape of the combustible pin 75 is a trapezoid, but the embodiment of the present utility model is not limited thereto, and the cross-sectional shape of the combustible pin 75 may be rectangular, tapered, or the like as long as it can be fixed to the air outlet end of the air outlet nozzle 721 and does not block the air outlet of the air outlet nozzle 721.

The inflammable pin 75 may be formed in a ring shape penetrating in the axial direction, for example, the outer surface of the inflammable pin 75 may be fixed to the inner wall of the gas outlet 721, and the gas may flow through the middle part of the ring shape.

In addition, the structure of the magnetic valve core 74 of the fire protection valve 7 is the same as or similar to the structure of the magnetic valve core 40 of the fire protection valve 1, for example, the stem 742 of the magnetic valve core 74 may be hollow, for example, the hollow structure shown in fig. 9, but the embodiment of the present utility model is not limited thereto, and the stem of the magnetic valve core 74 may be formed of 1 or more thin rod structures, as long as the air flow channel in the air outlet nozzle 721 is not blocked.

As described above, by the fire protection valve of the embodiment of the utility model, the backflow of fire can be prevented, and the fire protection valve can resist flame and reduce the risk of fire.

Embodiments of the second aspect

An embodiment of the second aspect of the present utility model provides an oxygenerator comprising the fire damper of the embodiment of the first aspect. For example, the fire damper described in the embodiment of the first aspect may be connected to a nasal oxygen cannula of an oxygenerator. Since in the embodiment of the first aspect, the structure of the fire damper has been described in detail, the contents thereof are incorporated herein, and the description thereof is omitted.

In addition, the oxygenerator of the embodiment of the second aspect of the present utility model may further include other components, for example, an oxygenerator housing, a compressor, a muffler, and the like. The embodiment of the second aspect of the present utility model does not limit the specific structure of the oxygenerator, and can be designed according to actual needs, and the specific structure of other components can refer to the related art.

As described above, according to the oxygenerator of the embodiment of the utility model, the backflow of fire can be prevented, and the supply of oxygen can be blocked when a fire occurs, so that the flame retardant effect is realized, and the risk of fire is reduced.

The above embodiments have been described only by way of example of the embodiments of the present utility model, but the present utility model is not limited thereto, and appropriate modifications may be made on the basis of the above embodiments. For example, each of the above embodiments may be used alone, or one or more of the above embodiments may be combined. It should be apparent to those skilled in the art that these descriptions are exemplary and not intended to limit the scope of the utility model. Various modifications and alterations of this utility model will occur to those skilled in the art in light of the spirit and principles of this utility model, and such modifications and alterations are also within the scope of this utility model.

It should be noted that the above only describes the respective components or modules related to the present utility model, but the present utility model is not limited thereto. The fire protection valve of the embodiment of the present utility model may further include other components or modules, and for the specific content of these components or modules, reference may be made to the related art.

Claims (8)

1. A fire-proof valve is characterized in that the fire-proof valve comprises an air inlet cavity and an air outlet cavity, the air inlet cavity is connected with the air outlet cavity in a sealing way and forms an accommodating space,

the fireproof valve also comprises a permanent magnet and a magnetic valve core which are positioned in the accommodating space, the permanent magnet is fixed on the radial outer side of the air outlet nozzle of the air outlet cavity, the magnetic valve core comprises a head part and a rod part, the head part is closer to the air inlet cavity than the permanent magnet, the radial dimension of the head part is larger than the inner diameter of the air outlet nozzle, the rod part penetrates through the permanent magnet and is inserted into the air outlet nozzle,

the fire-proof valve further comprises a flammable pin, the flammable pin is inserted into the air outlet nozzle from the outer side of the air outlet nozzle and is abutted with the end part of the rod part, and the distance from the permanent magnet to the flammable pin is shorter than the length of the rod part.

2. The fire protection valve of claim 1, wherein a limit portion is also formed in the receiving space, the limit portion being closer to the air intake chamber than the head portion of the magnetic spool.

3. The fire protection valve according to claim 2, wherein the stopper portion includes at least three ribs formed on an inner wall of the air outlet chamber and at least two stoppers fitted with the ribs, and a pitch of the at least two stoppers is smaller than a radial dimension of the head portion.

4. The fire protection valve of claim 1, wherein the stem is hollow.

5. The fire protection valve according to claim 1, wherein the permanent magnet has an annular structure, and an inner diameter of the permanent magnet is greater than or equal to an inner diameter of the air outlet nozzle and smaller than a radial dimension of the head.

6. The fire protection valve according to claim 1, wherein the inflammable pin is formed by connecting a plurality of fan blades, and a structure which is matched with the inflammable pin is formed on the outer side of the end part of the air outlet nozzle opposite to the air inlet nozzle of the air inlet cavity in the air outlet direction.

7. The fire protection valve of claim 1 or 6, wherein the flammable pin and the air outlet nozzle are held relatively stationary by friction forces that are greater than magnetic forces between the permanent magnet and the magnetic spool.

8. An oxygenerator comprising a fire damper according to any one of claims 1 to 7.

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