Gas fire extinguishing system safety relief device with single-hole alloy combined structure

Abstract

The invention provides a gas fire extinguishing system safety relief device of a single-hole alloy combined structure, which comprises a main body structure and a protective structure which are detachably connected, an axially through relief hole is formed in the main body structure, a fusible alloy is arranged in the relief hole, and a refractory alloy is arranged at the center of the fusible alloy; the top of the protection structure is sealed, and one or more than two round holes are formed in the side wall of the protection structure. According to the safety relief device, the shearing resistance is not provided for the fusible alloy only by means of threads on the hole wall of the pressure relief hole, but by means of the large hole section and the small hole section arranged in the relief hole, the fusible alloy is clamped on the main body structure and provides resistance together with the threads; according to the safety relief device, the pressure relief detonation phenomenon caused by misoperation under the non-design working condition is effectively prevented, and meanwhile, the refractory alloy connected in the fusible alloy can reduce the melting amount of the fusible alloy, so that the blockage probability of the pressure relief hole is reduced, and the safety relief device is more efficient when acting.

Description

Technical Field

[0001] The invention belongs to the field of fire extinguishing equipment, and in particular relates to a gas fire extinguishing system safety discharge device with a single-hole alloy combined structure. Background Art

[0002] High-boiling-point fire extinguishing agents are liquids at room temperature. In order to increase their spray pressure, high-boiling-point fire extinguishing agents are often stored together with inert gases. Therefore, their storage pressure is relatively high. Temperature changes cause large changes in storage pressure, so a safety relief device is installed on the fire extinguishing agent storage tank.

[0003] The safety relief device goes through two stages: the bursting disc and the fusible alloy stage. The bursting disc device is a disposable device and needs to be replaced after use. However, there are some problems when replacing the bursting disc: the bursting disc needs to be tightened with a special wrench, the bursting disc must be in the center of the pressure relief hole, and the manual replacement of the bursting disc requires very high working conditions and operating skills. If technical problems occur during the replacement of the bursting disc, the bursting disc will start working before the set temperature and set pressure are reached, increasing more manpower and material resources.

[0004] The storage pressure in the fire extinguishing agent storage tank is proportional to the storage temperature. When the temperature rises, the storage pressure of the fire extinguishing agent also rises. It is the temperature change that causes the pressure change of the fire extinguishing agent in the storage tank. The increase in the pressure in the storage tank means that the temperature of the stored material in the storage tank also rises. Therefore, for the safety relief device of the fusible alloy structure, under the premise of leaving a safety margin, the corresponding storage temperature can be deduced according to the set storage pressure. The selection of fusible alloys with different formulations can adapt to the working conditions of different operating temperatures.

[0005] Discharge efficiency of fusible alloy safety relief device: For fusible alloy structure safety relief device with multiple discharge holes, the sum of the cross-sectional areas of the holes is proportional to the discharge efficiency. Therefore, the discharge efficiency of one hole is the highest, and the single hole processing difficulty is also the lowest. However, fusible alloys are usually fixed by the shear resistance of the threads on the inside of the main body. For a single-hole relief device, the force-bearing area of ​​the fusible alloy is large, and the contact area with the main body is small. The fusible alloy is difficult to fix, and it may start working before reaching the set temperature and set pressure, and the quality cannot be guaranteed.

[0006] At the same time, when the safety relief device is activated, relying solely on fusible alloys may cause the discharge hole to be blocked, making it impossible to start immediately, which may cause an accident. The fusible alloys and the fire extinguishing agent in the tank may be sprayed out under high pressure and may cause casualties or cause the tank to overturn. Summary of the invention

[0007] In view of this, the present invention aims to overcome the defects in the prior art and proposes a gas fire extinguishing system safety discharge device with a single-hole alloy composite structure.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0009] A gas fire extinguishing system safety discharge device with a single-hole alloy composite structure comprises a main structure and a protective structure that can be detachably connected, wherein an axially penetrating discharge hole is arranged in the main structure, a fusible alloy is arranged in the discharge hole, and a refractory alloy is arranged at the center of the fusible alloy; the top of the protective structure is sealed, and one or more circular holes are opened on the side wall.

[0010] In some embodiments, the height of the refractory alloy is h, and the distance between the upper edge of the circular hole and the top wall of the protective structure is H, wherein h≤H.

[0011] When the safety discharge device of the present invention is in action, the temperature rises to reach the melting temperature of the fusible alloy, causing the fusible alloy to melt. Under the action of the thrust of the fusible alloy, the refractory alloy is pushed out of the discharge hole and pushed to the top of the protective structure. In order to prevent the refractory alloy from clogging the circular hole, resulting in the inability to spray the fire extinguishing agent or reducing the discharge and disinfection, the height of the refractory alloy is required to be no greater than the distance between the upper edge of the circular hole and the top wall of the protective structure.

[0012] In some embodiments, the number of the circular holes is 1, 2, 3, 4, 5, 6, 7, 8 or more. More preferably, the number of the circular holes is 6, and the 6 circular holes are evenly distributed on the side of the protective device, and the 6 circular holes have the same size and are all located on the same horizontal line.

[0013] In some embodiments, the discharge hole in the main structure is composed of a large hole section and a small hole section in sequence, a portion of the fusible alloy is located in the large hole section, and the remaining portion is located in the small hole section.

[0014] In some embodiments, the top of the fusible alloy is provided with a mounting groove, and the refractory alloy is arranged in the mounting groove. In some embodiments, the refractory alloy is threadedly connected to the fusible alloy, the side wall of the mounting groove is provided with an internal thread, and the outer surface of the refractory alloy is provided with an external thread matching the thread groove.

[0015] In some embodiments, reinforcement grooves are provided at the inner walls of the large hole section and the small hole section that are in contact with the fusible alloy.

[0016] In some embodiments, the reinforcement groove is a continuous or discontinuous protrusion or depression, such as a thread, a groove, etc. The fusible alloy is injection-molded and fastened to the main structure.

[0017] In some embodiments, the main structure and the protective structure are threadedly connected, and the main structure is threadedly connected to the fire extinguishing agent tank.

[0018] In some embodiments, the outer surface of the main structure is a hexagonal nut structure.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The safety relief device described in the present invention no longer relies solely on the threads of the pressure relief hole wall to provide shear resistance for the fusible alloy, but relies on the large hole section and the small hole section arranged in the relief hole, so that the fusible alloy is stuck on the main structure and provides resistance together with the threads, effectively preventing the pressure relief and explosion caused by misoperation under non-design working conditions. At the same time, the refractory alloy connected inside the fusible alloy can reduce the melting amount of the fusible alloy, thereby reducing the probability of blockage of the pressure relief hole, and the safety relief device is more efficient when it works. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A front view of the main structure according to an embodiment of the present invention;

[0023] Figure 2 A structural diagram of a safety release device according to an embodiment of the present invention;

[0024] Figure 3 A cross-sectional view of a safety release device according to an embodiment of the present invention;

[0025] Figure 4 A partial cross-sectional view of a safety release device according to an embodiment of the present invention;

[0026] Figure 5 It is a cross-sectional view of the working state of the protective structure described in the embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1. Protective structure; 2. Round hole; 3. Refractory alloy; 4. Fusible alloy; 5. Main structure; 6. Hexagonal nut structure; a. First thread; b. Second thread; c. Third thread; d. Fourth thread; e. Fifth thread. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] See also Figure 1-5 The present invention provides a gas fire extinguishing system safety discharge device with a single-hole alloy composite structure, and the safety discharge device includes a main structure 5 and a protective structure 1 that can be detachably connected.

[0035] like Figure 1-Figure 3As shown, the main structure 5 is provided with an axially penetrating discharge hole, and the discharge hole is provided with a fusible alloy 4. In some embodiments, the discharge hole in the main structure 5 is composed of a large hole section and a small hole section in sequence, and part of the fusible alloy 4 is located in the large hole section, and the remaining part is located in the small hole section. The fusible alloy 4 relies on the large hole section and the small hole section provided in the discharge hole so that the fusible alloy 4 is stuck on the main structure 5 to provide resistance.

[0036] like Figure 2-Figure 3 As shown, the inner wall of the large hole section and the small hole section in the discharge hole that are in contact with the fusible alloy 4 is provided with a reinforcement groove. The reinforcement groove is a continuous or discontinuous protrusion or depression, such as a thread, a groove, etc. The fusible alloy 4 is fastened to the main structure 5 after injection molding, and the shear resistance is provided for the fusible metal through the reinforcement groove.

[0037] like Figure 3 As shown, a refractory alloy 3 is disposed at the center of the fusible alloy 4, a mounting groove is disposed on the top of the fusible alloy 4, and the refractory alloy 3 is disposed in the mounting groove. In some embodiments, the refractory alloy 3 is threadedly connected to the fusible alloy 4, the side wall of the mounting groove is provided with an internal thread, and the outer surface of the refractory alloy 3 is provided with an external thread that matches the thread groove. The refractory alloy 3 connected inside the fusible alloy 4 can reduce the melting amount of the fusible alloy 4, thereby reducing the probability of blockage of the pressure relief hole.

[0038] like Figure 2-Figure 3 As shown, the top of the protective structure 1 is sealed, and one or more circular holes 2 are opened on the side wall. In some embodiments, the number of circular holes 2 is 1, 2, 3, 4, 5, 6, 7, 8 or more. In some embodiments, the number of circular holes 2 is 6, and the 6 circular holes 2 are evenly distributed on the side of the protective device. The 6 circular holes 2 have the same size and are all located on the same horizontal line.

[0039] It is important to note that if Figure 5 As shown, in order to prevent the refractory metal from entering the top of the protective structure 1 and blocking the circular hole 2 during operation, specifically, the height of the refractory alloy 3 is h, the distance between the upper edge of the circular hole 2 and the top wall of the protective structure 1 is H, and h≤H is required.

[0040] When the safety discharge device of the present invention is in action, the temperature rises to reach the melting temperature of the fusible alloy 4, causing the fusible alloy 4 to melt. Under the thrust of the fusible alloy 4, the refractory alloy 3 is pushed out of the discharge hole and pushed to the top of the protective structure 1. In order to prevent the refractory alloy 3 from clogging the circular hole 2, resulting in the inability to spray the fire extinguishing agent, or reducing the discharge and disinfection, it is required that the height of the refractory alloy 3 is not greater than the distance between the upper edge of the circular hole 2 and the top wall of the protective structure 1.

[0041] In some embodiments, the refractory alloy 3 and the fusible alloy 4 are threadedly connected via a second thread b, the side wall of the mounting groove is provided with an internal thread, and the outer surface of the refractory alloy 3 is provided with an external thread matching the thread groove.

[0042] Reinforcement grooves are provided at the inner walls of the large hole section and the small hole section that are in contact with the fusible alloy 4. The reinforcement grooves are continuous or discontinuous protrusions or depressions, such as threads, grooves, etc. In some embodiments, the threads on the inner wall of the small hole section are third threads c, and the threads on the inner wall of the large hole section are fourth threads d, so that the fusible alloy 4 is tightly connected to the main structure 5 after injection molding, and at the same time provides more resistance for the fusible alloy 4 to prevent pressure relief and explosion caused by misoperation under non-designed working conditions. In the manufacturing process of the safety discharge device of the present invention, the reinforcement grooves of the large hole section and the small hole section in the discharge hole are processed in advance, and the smelted fusible alloy 4 is formed by a casting process, so that the fusible alloy 4 is fixed to the reinforcement grooves of the large hole section and the small hole section in the discharge hole to provide shear resistance.

[0043] In some embodiments, the main structure 5 and the protective structure 1 are threadedly connected through a first thread a, and the main structure 5 and the fire extinguishing agent storage tank are threadedly connected through a fifth thread e. In order to facilitate tightening the threads of the main structure 5 and the protective structure 1, the outer surface of the main structure 5 is a hexagonal nut structure 6.

[0044] When the safety release device of the present invention is in a non-operating state, Figure 4 As shown, under the action of the pressure in the fire extinguishing agent storage tank, the part of the fusible alloy 4 connected to the internal space of the fire extinguishing agent storage tank is stuck in the large hole section of the discharge hole in the main structure 5, and at the same time, another part of the fusible alloy 4 is arranged in the small hole section of the discharge hole to provide shear resistance. Under the joint action of the two, the fusible alloy 4 is fixed. The inner side of the fusible alloy 4 is connected to the refractory alloy 3 in the form of a thread, and the refractory alloy 3 provides radial support for the fusible alloy 4.

[0045] When the safety release device of the present invention is in working state, Figure 5 As shown, the temperature rises to the melting temperature of the fusible alloy 4, causing the fusible alloy 4 to melt. Under the thrust of the fusible alloy 4, the refractory alloy 3 is pushed out of the discharge hole and pushed into the protective structure 1. Due to the presence of the refractory alloy 3, the amount of fusible alloy 4 used is reduced, reducing the probability of clogging the discharge hole and increasing the probability of normal operation of the safety discharge device. At the same time, the refractory alloy 3 and the fusible alloy 4 enter the sealed end of the protective structure 1 together to avoid direct spraying and accidental injury to personnel, and the fire extinguishing agent is evenly sprayed out from the circular hole 2 on the side of the protective structure 1, with balanced force to prevent the fire extinguishing agent storage tank from tipping over.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas fire extinguishing system safety release device with a single-hole alloy composite structure, characterized in that: It comprises a main structure and a protective structure which can be detachably connected. The main structure is provided with an axially penetrating discharge hole, in which a fusible alloy is provided, and a refractory alloy is provided at the center of the fusible alloy. The top of the protective structure is sealed, and one or more circular holes are opened on the side wall.

2. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The height of the refractory alloy is h, and the distance between the upper edge of the circular hole and the top wall of the protective structure is H, wherein h≤H.

3. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The number of the circular holes is 6, and the 6 circular holes are evenly distributed on the side of the protective device. The 6 circular holes have the same size and are all located on the same horizontal line.

4. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The discharge hole in the main structure is composed of a large hole section and a small hole section in sequence, a part of the fusible alloy is located in the large hole section, and the remaining part is located in the small hole section.

5. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: A mounting groove is arranged on the top of the fusible alloy, and the refractory alloy is arranged in the mounting groove.

6. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The refractory alloy is threadedly connected to the fusible alloy, the side wall of the installation groove is provided with an internal thread, and the outer surface of the refractory alloy is provided with an external thread matched with the thread groove.

7. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 4 is characterized by: The inner walls of the large hole section and the small hole section that are in contact with the fusible alloy are both provided with reinforcement grooves.

8. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 7 is characterized by: The reinforcement groove is a continuous or discontinuous protrusion or depression.

9. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The main structure and the protective structure are threadedly connected, and the main structure is threadedly connected to the fire extinguishing agent storage tank.

10. The gas fire extinguishing system safety release device of the single-hole alloy composite structure according to claim 1 is characterized by: The outer surface of the main structure is a hexagonal nut structure.

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