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

Abstract

The utility model provides a gas fire extinguishing system safety relief device with a single-hole alloy combined structure, which comprises a main body structure and a protective structure which are detachably connected, an axial through relief hole is arranged in the main body structure, fusible alloy is arranged in the relief hole, and 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 the 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] This utility model belongs to the field of fire extinguishing equipment, and in particular relates to a safety relief device for a gas fire extinguishing system with a single-hole alloy composite structure. Background Technology

[0002] High-boiling-point extinguishing agents are liquids at room temperature. To increase their injection pressure, high-boiling-point extinguishing agents are often stored together with inert gases. Therefore, their storage pressure is relatively high, and temperature changes cause large changes in storage pressure. As a result, safety relief devices are installed on the extinguishing agent storage tank.

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

[0004] The storage pressure inside a fire extinguishing agent storage tank is directly proportional to the storage temperature. As 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 inside the tank. An increase in pressure inside the tank means that the temperature of the stored substance inside the tank also rises. Therefore, for safety relief devices with fusible alloy structures, provided a safety margin is allowed, the corresponding storage temperature can be deduced from the set storage pressure. Selecting different fusible alloy formulations can adapt to different operating temperature conditions.

[0005] Discharge efficiency of fusible alloy safety relief devices: For fusible alloy safety relief devices 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 a single hole is the highest, and the processing difficulty of a single hole is also the lowest. However, fusible alloys are usually fixed by the shear resistance of the threads on the inner side of the main body. For single-hole relief devices, the force-bearing area of ​​the fusible alloy is very large, while the contact area with the main body is very small. It is difficult to fix the fusible alloy, and it may start working before the set temperature and set pressure are reached, so the quality cannot be guaranteed.

[0006] Meanwhile, when the safety relief device is activated, relying solely on the fusible alloy may cause the relief hole to become blocked, preventing it from activating immediately and potentially leading to an accident. Furthermore, the fusible alloy and the extinguishing agent inside the storage tank being sprayed out under high pressure may cause casualties or even cause the storage 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 safety release device for a gas extinguishing system with a single-hole alloy composite structure.

[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0009] A safety relief device for a gas extinguishing system with a single-hole alloy composite structure includes a detachably connected main structure and a protective structure. The main structure has an axially penetrating relief hole, and a fusible alloy is placed inside the relief hole. A refractory alloy is placed 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 relief device of this utility model is in operation, the temperature rises to the melting temperature of the fusible alloy, causing the fusible alloy to melt. Under the thrust of the fusible alloy, the refractory alloy is pushed out of the relief hole and pushed to the top of the protective structure. In order to prevent the refractory alloy from blocking the round hole, which would prevent the fire extinguishing agent from being sprayed out or reduce the relief and disinfection, the height of the refractory alloy is required to be no greater than the distance between the upper edge of the round 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 circular holes is 6, and the 6 circular holes are evenly distributed on the side of the protective device. The 6 circular holes are of the same size and are all located on the same horizontal line.

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

[0014] In some embodiments, the fusible alloy has a mounting groove on its top, and the refractory alloy is disposed within the mounting groove. In some embodiments, the refractory alloy and the fusible alloy are threaded together, the sidewall of the mounting groove has an internal thread, and the outer surface of the refractory alloy has an external thread that mates with the threaded groove.

[0015] In some embodiments, a reinforcing groove is provided on the inner wall of both the large-hole section and the small-hole section where it contacts the fusible alloy.

[0016] In some embodiments, the reinforcing groove is a continuous or discontinuous protrusion or depression, such as a thread, groove, etc., which allows the fusible alloy to be cast and then securely connected 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 storage tank.

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

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] The safety relief device of this invention no longer relies solely on the threads on the wall of the pressure relief hole to provide shear resistance for the fusible alloy. Instead, it relies on the large and small hole sections set inside the relief hole, which allow the fusible alloy to be stuck on the main structure and provide resistance together with the threads. This effectively prevents pressure relief explosion caused by misoperation under non-design working conditions. At the same time, the refractory alloy connected inside the fusible alloy can reduce the amount of fusible alloy melting, thereby reducing the probability of pressure relief hole blockage. The safety relief device is more efficient when it is in operation. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a front view of the main structure described in an embodiment of the present utility model;

[0023] Figure 2 This is a structural diagram of the safety relief device described in an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the safety relief device described in an embodiment of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the safety relief device described in an embodiment of the present utility model;

[0026] Figure 5 This is a cross-sectional view of the protective structure in operation according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Protective structure; 2. Circular 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 Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

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

[0034] See Figure 1-5 This utility model provides a safety relief device for a gas extinguishing system with a single-hole alloy composite structure. The safety relief device includes a detachably connected main structure 5 and a protective structure 1.

[0035] like Figures 1-3As shown, the main structure 5 has an axially penetrating vent hole, and a fusible alloy 4 is disposed within the vent hole. In some embodiments, the vent hole in the main structure 5 is composed of a large-hole section and a small-hole section, with a portion of the fusible alloy 4 located within the large-hole section and the remainder within the small-hole section. The fusible alloy 4 provides resistance by being held in place by the large-hole section and the small-hole section within the vent hole.

[0036] like Figures 2-3 As shown, reinforcing grooves are provided on the inner walls of both the large and small sections of the vent hole where they contact the fusible alloy 4. These reinforcing grooves can be continuous or discontinuous protrusions or depressions, such as threads or grooves. This ensures that the fusible alloy 4 is securely connected to the main structure 5 after casting, and provides shear resistance to the fusible metal through the reinforcing grooves.

[0037] like Figure 3 As shown, a refractory alloy 3 is disposed at the center of the fusible alloy 4, and a mounting groove is provided on the top of the fusible alloy 4, with the refractory alloy 3 disposed within the mounting groove. In some embodiments, the refractory alloy 3 is threadedly connected to the fusible alloy 4, the sidewall 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 mates with the threaded groove. The refractory alloy 3 connected inside the fusible alloy 4 can reduce the amount of fusible alloy 4 that melts, thereby reducing the probability of blockage of the pressure relief hole.

[0038] like Figures 2-3 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 are the same size and are all located on the same horizontal line.

[0039] It is important to note that, such as Figure 5 As shown, to prevent 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, and the distance between the upper edge of the circular hole 2 and the top wall of the protective structure 1 is H, requiring h≤H.

[0040] When the safety relief device of this utility model is in operation, the temperature rises to the melting temperature of the fusible alloy 4, causing the fusible alloy 4 to melt. Under the pushing force of the fusible alloy 4, the refractory alloy 3 is pushed out of the relief hole and pushed to the top of the protective structure 1. In order to prevent the refractory alloy 3 from blocking the round hole 2, which would prevent the fire extinguishing agent from being sprayed out or reduce the relief and disinfection, the height of the refractory alloy 3 is required to be no greater than the distance between the upper edge of the round 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 connected by a second thread b. The sidewall 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 mates with the threaded groove.

[0042] Reinforcing grooves are provided on the inner walls of both the large and small orifice sections where they contact the fusible alloy 4. These reinforcing grooves can be continuous or discontinuous protrusions or depressions, such as threads or grooves. In some embodiments, the thread on the inner wall of the small orifice section is a third thread c, and the thread on the inner wall of the large orifice section is a fourth thread d. This ensures that the fusible alloy 4 is securely connected to the main structure 5 after casting, while also providing more resistance to the fusible alloy 4 to prevent pressure relief and explosion caused by misoperation under non-designed working conditions. During the manufacturing process of the safety relief device of this utility model, the reinforcing grooves of the large and small orifice sections inside the relief hole are pre-processed, and the molten fusible alloy 4 is formed using a casting process, fixing the fusible alloy 4 to the reinforcing grooves of the large and small orifice sections inside the relief hole to provide shear resistance.

[0043] In some embodiments, the main structure 5 and the protective structure 1 are threaded together by a first thread a, and the main structure 5 and the extinguishing agent storage tank are threaded together by a fifth thread e. To facilitate tightening of 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 relief device described in this utility model is in a non-operating state, such as Figure 4 As shown, under the pressure inside the extinguishing agent storage tank, the portion of the fusible alloy 4 that is in contact with the internal space of the extinguishing agent storage tank is stuck in the large orifice section of the vent hole in the main structure 5. At the same time, another portion of the fusible alloy 4 is disposed in the small orifice section of the vent hole to provide shear resistance. Under the combined action of the two, the fusible alloy 4 is fixed in place. The inner side of the fusible alloy 4 is connected to the refractory alloy 3 by a thread, and the refractory alloy 3 provides radial support force for the fusible alloy 4.

[0045] When the safety relief device described in this utility model is in working condition, such as Figure 5 As shown, the temperature rises to the melting temperature of the fusible alloy 4, causing it to melt. Under the thrust of the fusible alloy 4, the refractory alloy 3 is pushed out of the vent hole and into the protective structure 1. Due to the presence of the refractory alloy 3, the amount of fusible alloy 4 used is reduced, decreasing the probability of clogging the vent hole and increasing the probability of the safety venting device working properly. At the same time, the refractory alloy 3 and the fusible alloy 4 enter the sealed end of the protective structure 1 together, preventing direct spraying and accidental injury to personnel. The extinguishing agent is evenly sprayed from the round hole 2 on the side of the protective structure 1, with a balanced force, preventing the extinguishing agent storage tank from tipping over.

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

Claims

1. A single-hose alloy combination structure's gas fire extinguishing system safety relief device, characterized in that: The main body structure and the protection structure are detachably connected, the main body structure is provided with an axial through venting hole, the venting hole is provided with a fusible alloy, and the center of the fusible alloy is provided with a refractory alloy; the top of the protection structure is sealed, and one or more than two circular holes are opened in the side wall.

2. The single-hole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: 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 protection structure is H, wherein h≤H.

3. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: The number of the circular holes is six, the six circular holes are uniformly distributed on the side of the protection device, the six circular holes are of the same size, and are located on the same horizontal line.

4. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: The venting hole in the main body structure is composed of a large hole section and a small hole section in sequence, 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 single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: The top of the fusible alloy is provided with a mounting groove, and the refractory alloy is arranged in the mounting groove.

6. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 5, characterized in that: The refractory alloy is threadedly connected with 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 matched with the thread groove.

7. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 4, characterized in that: The inner walls of the large hole section and the small hole section in contact with the fusible alloy are each provided with a reinforcing groove.

8. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 7, characterized in that: The reinforcing groove is a continuous or discontinuous protrusion or recess.

9. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: The main body structure and the protection structure are threadedly connected, the main body structure is threadedly connected with the fire extinguishing agent storage tank.

10. The single-porthole alloyed combination structure's gas fire extinguishing system safety relief device according to claim 1, characterized in that: The outer surface of the main body structure is a hexagonal nut structure.

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