Electric heating dual-start sealing structure and non-pressure-storage type fire extinguishing device

Abstract

The invention relates to an electric heating dual-start sealing structure and a non-pressure-storage type fire extinguishing device.The electric heating dual-start sealing structure comprises a base used for being connected with a fire extinguisher body, an inner cavity is formed in the base, the base is further provided with two inlet and outlet channels communicated with the inner cavity, one inlet and outlet channel is communicated with the outside, and the other inlet and outlet channel is communicated with the outside; the other one is connected with a fuel gas generator in the fire extinguisher body; the inner cavity is filled with the sealing piece in a deformable mode, and the cross section area of the inlet and outlet channel is smaller than that of the inner cavity; the thermosensitive wire and the electric ignition head wire penetrate through the access channel, the parts, in the inner cavity, of the thermosensitive wire and the electric ignition head wire are extruded by the sealing piece, the exteriors of the thermosensitive wire and the electric ignition head wire are exposed out of the base, and the interiors extend into the fuel gas generator; and after the thermosensitive wire burns until the volume is dissipated, the sealing piece rebounds and blocks the access channel communicated with the inner cavity so as to realize self-sealing. Through the arrangement, self-sealing of the sealing structure is achieved, the structure is simple and compact, reliability is high, cost is low, and production and installation are convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishers, and in particular to an electric-thermal dual-start sealing structure and a non-pressure storage type fire extinguishing device. Background Art

[0002] Non-pressure storage fire extinguishers are generally composed of a fire extinguishing agent tank, a nozzle, an electric heat start device, etc. The basic principle is that when the fire extinguisher is used, the fire extinguishing agent is released through a certain start mechanism. Usually, the fire extinguishing agent is in a closed state and needs to be started by manual operation or external mechanical, thermal, etc.

[0003] In the prior art, the ignition reliability of non-pressure storage type fire extinguishers is improved by using an electric and thermal dual-start structure, that is, a device that uses an electric initiator and a thermistor to ignite the gas generator in the non-pressure storage type fire extinguisher to achieve automatic fire extinguishing. The electric start is to manually trigger the electric initiator to ignite the gas generator in the fire extinguisher to achieve manual fire extinguishing.

[0004] However, in the prior art, the thermal wires and electric starting elements are sealed mostly by integrated sealing or split sealing. Such sealing methods have the problem of poor reliability of thermal wire sealing, especially in non-pressure storage type fire extinguishers. The high-temperature combustion gas generated after the generator is ignited will leak from the sealing of the thermal wire, affecting the spraying performance of the non-pressure storage type fire extinguisher. Summary of the invention

[0005] The invention provides an electric-heat dual-start sealing structure and a non-pressure storage type fire extinguishing device to solve the problem of poor sealing at the thermal sensitive line of the non-pressure storage type fire extinguisher in the prior art.

[0006] The present invention discloses an electric and thermal dual-start sealing structure, comprising:

[0007] A base, used to connect with the fire extinguisher body, the base has an inner cavity, and the base also has two inlet and outlet channels connected with the inner cavity, one of the inlet and outlet channels is connected with the outside, and the other is connected with the gas generator in the fire extinguisher body;

[0008] a sealing member, deformably filled in the inner cavity, wherein the cross-sectional area of ​​the inlet and outlet passage is smaller than the cross-sectional area of ​​the inner cavity;

[0009] The heat-sensitive wire and the electric ignition head wire pass through the inlet and outlet passage and are partially squeezed by the sealing member in the inner cavity, and the heat-sensitive wire and the electric ignition head wire are exposed outside the base and extend into the gas generator;

[0010] Wherein, after the heat-sensitive wire burns until its volume dissipates, the sealing member rebounds and blocks the inlet and outlet passages communicating with the inner cavity to achieve self-sealing.

[0011] Furthermore, the inner cavity is a cylindrical structure, and the sealing element is a spherical structure.

[0012] Furthermore, the sealing element is made of silicone rubber.

[0013] Further, the base includes a base and a nut threadedly connected to the base;

[0014] The base is provided with a stud which is threadedly connected with the fire extinguisher body, and an inlet and outlet channel is arranged through the stud.

[0015] Furthermore, the base has a placement groove with threads on the outer wall on a side facing away from the stud, and the nut is screwed to the placement groove to form the inner cavity.

[0016] Furthermore, another inlet and outlet channel is formed on the nut.

[0017] Furthermore, the inner diameter of the placement groove is smaller than the diameter of the sealing member, and the distance between the nut and the placement groove after being screwed together is smaller than the diameter of the sealing member.

[0018] Furthermore, both ends of the inlet and outlet passage have rounded corners.

[0019] The present invention also discloses a non-pressure storage type fire extinguisher, comprising: the electric-thermal dual-start sealing structure as described in any one of the above items.

[0020] Furthermore, the non-pressure storage type fire extinguisher also includes:

[0021] A barrel section, one end of which is provided with an outlet, the outlet is provided with a diaphragm, and the electric and thermal dual-start sealing structure is fixed to the other end of the barrel section;

[0022] A central tube is arranged at the axial center of the barrel section, and a gas generator is provided on one end of the central tube close to the electric and thermal dual-start sealing structure, and the interior of the thermal sensitive wire and the electric ignition head extends into the gas generator;

[0023] A piston is axially slidably disposed on the outer wall of the central tube, and the piston is close to the gas generator in an initial position;

[0024] A fire extinguishing agent is filled in the cylinder section and is outside the piston and the center tube;

[0025] After the heat-sensitive wire or the electric ignition head is ignited, the gas generator is ignited, and the piston squeezes the fire extinguishing agent to spray out from the outlet.

[0026] The electric heating dual-start sealing structure and the non-pressure storage type fire extinguishing device provided by the present invention can achieve the following technical effects:

[0027] By setting up an inner cavity in the base and filling the inner cavity with a seal, when the thermal wire passing through the inner cavity is ignited and the volume dissipates, the seal can rebound and quickly fill the side wall surface and the inlet and outlet channels of the inner cavity of the base, thereby achieving a self-sealing effect. Compared with the prior art, the reliability of the seal is improved.

[0028] The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are regarded as similar elements, and wherein:

[0030] Figure 1 is a structural schematic diagram of an electric and thermal dual-start sealing structure in an embodiment of the present invention;

[0031] Figure 2 is an axial cross-sectional view of an electric and thermal dual-start sealing structure in an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the explosion decomposition structure of an electric and thermal dual-start sealing structure in an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of an exploded structure of a base in an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the axial cross-sectional structure of a non-pressure storage type fire extinguisher in an embodiment of the present invention.

[0035] Reference numerals:

[0036] 1. Base; 11. Inner cavity; 12. Inlet and outlet channel; 121. Rounded corner structure; 13. Base; 131. Stud; 132. Placement groove; 14. Nut; 2. Seal; 3. Thermistor wire; 4. Electric ignition head; 10. Electric heating dual start sealing structure; 20. Cylinder section; 21. Outlet; 22. Diaphragm; 30. Center tube; 31. Gas generator; 40. Piston; 50. Fire extinguishing agent. DETAILED DESCRIPTION

[0037] In order to be able to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present invention. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0038] The terms "first", "second", etc. in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present invention described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the embodiments of the present invention, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0040] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0041] Unless otherwise specified, the term "plurality" means two or more and "plurality" means two or more.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention may be combined with each other.

[0043] like Figure 1 to Figure 2As shown, the present invention discloses an electric thermal dual start sealing structure 10, comprising a base 1, a sealing member 2, a thermal wire 3 and an electric ignition head 4, as shown in FIG. Figure 1 and Figure 2 As shown in:

[0044] The base 1 is used to connect with the fire extinguisher body, and has an inner cavity 11 inside the base 1. The base 1 also has two inlet and outlet channels 12 connected with the inner cavity 11, one of the inlet and outlet channels 12 is connected with the outside, and the other is connected with the gas generator 31 in the fire extinguisher body; it should be pointed out here that in the embodiment of the present invention, there are many ways to connect the base 1 with the fire extinguisher, for example, it can be through a threaded connection, or it can also be welded or snap-on connection; the two inlet and outlet channels 12 are used for the thermistor wire 3 and the electric ignition head 4 to penetrate from the outside and contact with the fire extinguisher generator; the seal 2 can be deformably filled in the inner cavity 11, and the cross-sectional area of ​​the inlet and outlet channels 12 is smaller than the cross-sectional area of ​​the inner cavity 11; the deformability here means that the seal 2 is compressed into the inner cavity 11 and cannot pass through the two inlet and outlet channels 12. The thermistor wire 3 and the electric ignition head 4 pass through the inlet and outlet channel 12 and the parts in the inner cavity 11 are squeezed by the sealing member 2, the external parts of the thermistor wire 3 and the electric ignition head 4 are exposed outside the base 1, and the internal parts extend into the gas generator; in an embodiment of the present invention, when the thermistor wire 3 is ignited, the flame is transmitted to the inside of the generator, or a starting signal is given to the electric ignition head 4 to ignite the gas-producing agent to produce a large amount of high-temperature and high-pressure gas inside the combustion chamber of the generator, and the high-temperature and high-pressure gas will also ignite the thermistor wire 3, and after the thermistor wire 3 burns until its volume dissipates, the sealing member 2 rebounds and blocks the inlet and outlet channel 12 connected to the inner cavity 11 to achieve self-sealing.

[0045] In the above embodiment, by providing an inner cavity 11 in the base 1 and filling the inner cavity 11 with a seal 2, when the thermistor 3 passing through the inner cavity 11 is ignited and the volume dissipates, the seal 2 can rebound and quickly fill the side wall surface of the inner cavity 11 of the base 1 and the inlet and outlet channel 12, thereby achieving a self-sealing effect. Compared with the prior art, the reliability of the seal is improved.

[0046] Alternatively, if Figure 2 As shown in the figure, the inner cavity 11 is a cylindrical structure, and the sealing member 2 is a spherical structure. The inner cavity 11 of the cylindrical structure is easier to process, and the spherical sealing member 2 can be made of silicone rubber. The surface of the spherical sealing member 2 made of silicone rubber is smooth and scratch-free. In the embodiment of the present invention, the diameter of the cylindrical inner cavity 11 can be 10 mm, and the diameter of the spherical sealing member 2 is not less than 10 mm, and the part where the diameter of the inner cavity 11 is less than the diameter of the rubber ball does not exceed 0.5 mm; the diameter of the inlet and outlet channel 12 is not greater than 4 mm. When placing the thermal sensitive wire 3 and the electric ignition head 4, the following method can be used: Figure 2The sealing balls are placed in a symmetrical manner as shown in the figure, which can ensure safety on the one hand and improve the stability of the sealing ball placement on the other hand.

[0047] Alternatively, if Figure 3 As shown in the figure, the base 1 includes a base 13 and a nut 14 screwed to the base 13; screwing makes it easier to process and install; the base 13 has a stud 131 screwed to the fire extinguisher body, and one of the inlet and outlet channels 12 is set through the stud 131. The stud 131 here is used to connect with the fire extinguisher body, and specifically, a hexagonal prism can be set on the base 13 to facilitate tight connection with tools such as wrenches during installation; in addition, in the embodiment of the present invention, in order to ensure sealing performance, a sealing ring can be set on the stud 131.

[0048] Alternatively, if Figure 3 and Figure 4 As shown in the figure, the base 13 has a placement groove 132 with threads on the outer wall on the side away from the stud 131, and the nut 14 is screwed with the placement groove 132 to form an inner cavity 11. In the embodiment of the present invention, the thread is set on the outside of the side of the base 13 away from the stud 131, so that the damage to the seal 2 during installation can be reduced; another inlet and outlet channel 12 is formed on the nut 14. In the embodiment of the present invention, the inner diameter of the placement groove 132 is smaller than the diameter of the seal 2, and the distance between the nut 14 and the placement groove 132 after being screwed is smaller than the diameter of the seal 2. Specifically, in the embodiment of the present invention, the distance between the nut 14 and the placement groove 132 is smaller than the diameter of the spherical seal 2, and the smaller part is between 2-3mm. For example, if the diameter of the seal 2 is 10mm, the distance between the nut 14 and the placement groove 132 can be set between 7-8mm. By setting it in this way, on the one hand, it is convenient to place the thermal wire 3 and the electric ignition head 4, and on the other hand, the seal 2 can be squeezed when the nut 14 is screwed, thereby ensuring the reliability of the seal. In addition, in order to avoid damage to the electric ignition head 4 and the thermal line 3 by the inlet and outlet passage 12, in the embodiment of the present invention, as shown in FIG. Figure 4 As shown in FIG. 1 , both ends of the inlet and outlet channel 12 have rounded corner structures 121. In an embodiment of the present invention, the radius of the rounded corner is not less than 2 mm.

[0049] Through the above-mentioned structural setting, the structure of the electric thermal dual-start sealing structure 10 is relatively simple and compact, with high reliability. It does not require gluing during installation, nor does it require surface treatment of the wiring harness of the thermistor wire 3 and the electric ignition head 4. It is low-cost and easy to promote in batches.

[0050] The present invention also discloses a non-pressure storage type fire extinguisher, including any of the above-mentioned electric thermal dual-start sealing structures 10. Of course, it should be pointed out here that there are various structural forms of non-pressure storage type fire extinguishers. The electric thermal dual-start sealing structure in the embodiment of the present invention is used for a structural form with a generator. In the following embodiments of the present invention, the specific structure of one of the non-pressure storage type fire extinguishers is introduced, but it is not limited to this type of non-pressure storage type fire extinguisher. Figure 5 As shown in, the non-pressure storage type fire extinguisher in the embodiment of the present invention includes a barrel section 20, a central tube 30, a piston 40 and a fire extinguishing agent 50, wherein: one end of the barrel section 20 has an outlet 21, the outlet 21 has a diaphragm 22, and the electric thermal dual-start sealing structure is fixed to the other end of the barrel section 20; the one end here refers to the end away from the electric thermal dual-start sealing structure, which is used for the outlet 21 of the fire extinguishing agent 50, and the diaphragm 22 will be squeezed and broken after being subjected to pressure, so that the fire extinguishing agent 50 is sprayed out with the help of pressure; the central tube 30 is arranged at the axial position of the barrel section 20, and the end of the central tube 30 close to the electric thermal dual-start sealing structure has a gas generator 31, and the interior of the thermal sensitive wire 3 and the electric ignition head 4 extends into the gas generator 31; the gas generator 31 is used to be installed in the central tube 30, and when the gas is generated When the gas generator 31 is ignited, it will emit high-temperature and high-pressure gas, which will then push the piston 40 to move. There are many installation forms for the gas generator 31, and those skilled in the art can choose according to the existing technology, which will not be described here; in the embodiment of the present invention, it also includes a piston 40 that can be axially slidably arranged on the outer wall of the central tube 30, and the piston 40 is close to the gas generator 31 in the initial position; the fire extinguishing agent 50 is filled in the barrel section 20 and is outside the piston 40 and the central tube 30; that is, in the embodiment of the present invention, the fire extinguisher is filled in the barrel section 20, outside the central tube 30, and in front of the moving direction of the piston 40, so that when the gas generator 31 is ignited, the piston 40 is pushed to move toward the outlet 21, so that the fire extinguishing agent 50 is squeezed out of the outlet 21 to achieve fire extinguishing. After the thermistor 3 or the electric ignition head 4 is ignited, the gas generator 31 is ignited, and the piston 40 squeezes the fire extinguishing agent out of the outlet 21.

[0051] Application scenario of an exemplary embodiment:

[0052] like Figures 1 to 5As shown, when the ambient temperature reaches the set value, the thermistor is ignited, and the flame is transmitted to the electric heating dual start sealing structure 10 and enters the gas generator 31, or a start signal is manually given to the electric ignition head 4 to ignite the gas-producing agent of the generator, and a large amount of high-temperature and high-pressure gas is generated in the combustion chamber. Since the silicone rubber ball of the seal 2 has good high temperature resistance and resilience, after the combustion volume of the thermistor 3 dissipates, the rubber ball can ensure its own structural integrity and quickly rebound to fill and block the side wall surface of the inner cavity 11 of the base 1 and the inlet and outlet channel 12, and since the inside of the gas generator 31 is in a high-pressure state, this high-pressure state will further squeeze the seal 2 to block the inner cavity 11 of the base 1 and the inlet and outlet channel 12, so that the starting end of the generator is completely sealed, and no matter how long it takes, high-temperature gas leakage will not occur.

[0053] The above description and the accompanying drawings fully illustrate the embodiments of the present invention so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present invention are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An electric and thermal dual-start sealing structure (10), characterized in that: include: A base (1) is used to be connected to a fire extinguisher body, the base (1) has an inner cavity (11), and the base (1) also has two inlet and outlet channels (12) connected to the inner cavity (11), one of the inlet and outlet channels (12) is connected to the outside, and the other is connected to a gas generator (31) in the fire extinguisher body; A sealing member (2) is deformably filled in the inner cavity (11), and the cross-sectional area of ​​the inlet and outlet channel (12) is smaller than the cross-sectional area of ​​the inner cavity (11); The heat-sensitive wire (3) and the electric ignition head (4) wire pass through the inlet and outlet passage (12) and the portion in the inner cavity (11) is squeezed by the sealing member (2), and the heat-sensitive wire (3) and the electric ignition head (4) wire are exposed outside the base (1) and extend inside into the gas generator (31); After the heat-sensitive wire (3) burns until its volume is dissipated, the sealing member (2) rebounds and blocks the inlet and outlet passage (12) connected to the inner cavity (11) to achieve self-sealing.

2. The electric and thermal dual-start sealing structure (10) according to claim 1, characterized in that: The inner cavity (11) is a cylindrical structure, and the sealing element (2) is a spherical structure.

3. The electric and thermal dual-start sealing structure (10) according to claim 2 is characterized in that: The sealing element (2) is made of silicone rubber.

4. The electric and thermal dual-start sealing structure (10) according to claim 3 is characterized in that: The base (1) comprises a base (13) and a nut (14) threadedly connected to the base (13); The base (13) is provided with a stud (131) threadedly connected to the fire extinguisher body, and an inlet and outlet passage (12) is arranged through the stud (131).

5. The electric and thermal dual-start sealing structure (10) according to claim 4, characterized in that: The base (13) has a placement groove (132) with threads on the outer wall on the side facing away from the stud (131), and the nut (14) is screwed to the placement groove (132) to form the inner cavity (11).

6. The electric and thermal dual-start sealing structure (10) according to claim 5, characterized in that: Another of the inlet and outlet passages (12) is formed on the nut (14).

7. The electric and thermal dual-start sealing structure (10) according to claim 6, characterized in that: The inner diameter of the placement groove (132) is smaller than the diameter of the sealing member (2), and the distance between the nut (14) and the placement groove (132) after being screwed together is smaller than the diameter of the sealing member (2).

8. The electric and thermal dual-start sealing structure (10) according to claim 7, characterized in that: Both ends of the inlet and outlet channel (12) have rounded corner structures (121).

9. A non-pressure storage fire extinguisher, characterized in that: include: The electric thermal dual-start sealing structure (10) as claimed in any one of claims 1 to 8.

10. The non-storage pressure fire extinguisher according to claim 9, characterized in that: Also includes: A barrel section (20), one end of the barrel section (20) having an outlet (21), the outlet (21) having a diaphragm (22), and the electric and thermal dual-start sealing structure being fixed to the other end of the barrel section (20); A central tube (30) is arranged at the axial center of the cylinder section (20), and a gas generator (31) is provided on one end of the central tube (30) close to the electric and thermal dual-start sealing structure, and the interior of the thermosensitive wire (3) and the electric ignition head (4) extend into the gas generator (31); A piston (40) is axially slidably disposed on the outer wall of the central tube (30), wherein the piston (40) is close to the gas generator (31) in an initial position; A fire extinguishing agent (50) is filled in the cylinder section (20) and is located outside the piston (40) and the center tube (30); After the heat-sensitive wire (3) or the electric ignition head (4) is ignited, the gas generator (31) is ignited, and the piston (40) squeezes the fire extinguishing agent to spray out from the outlet (21).

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