Hazardous chemical fire valve

Abstract

The utility model discloses a dangerous chemical article fire valve relates to fire valve technical field. The utility model discloses a valve body, the top of valve body is provided with valve stem, one side of valve body is provided with connecting assembly, one side of connecting assembly is provided with pipeline, connecting assembly includes annular groove, and the annular groove is set up in the inner wall of valve body, and one side fixedly connected with sealing spring in the annular groove inner chamber. The utility model discloses a self -adaptation sealing structure that sealing spring, sealing cylinder and movable disc constitute, and the double -sealed design of sealing ring and sealing groove can effectively compensate the sealing surface gap change caused by medium corrosion, temperature change or pipeline vibration, significantly improve the sealing durability and reliability of valve under the strong corrosion, high pressure fluctuation working condition, and the fixed structure that the insertion hole on the surface of long bolt and mounting disc and flange disc is formed by intercoordination can prevent the connection of pipeline and fire valve from loosening.

Description

Technical Field

[0001] This utility model belongs to the field of fire valve technology, and in particular relates to fire valves for hazardous chemicals. Background Technology

[0002] Hazardous chemical fire valves are indispensable key safety equipment in the fields of petrochemical, pharmaceutical chemical, and hazardous chemical storage. They are mainly installed at key nodes such as hazardous chemical pipelines and storage tank outlets to quickly cut off the medium supply in emergency situations such as fire and leakage, or to inject extinguishing media in conjunction with fire protection systems. Their structural stability and sealing reliability are directly related to safe production and environmental safety.

[0003] A Chinese patent application with publication number CN222334641U discloses a fire valve for hazardous chemicals, including a main valve body, a rotating shaft, a rotating handle, and a switch indicator mechanism. The rotating shaft is rotatably mounted on the main valve body. The rotating handle is fixedly connected to the rotating shaft. The switch indicator mechanism includes an indicator box, an indicator element, a first gear, a second gear, and a transmission assembly. This utility model can effectively save time in figuring out the rotation direction and opening degree of the fire valve by intuitively indicating the opening degree of the hazardous chemical fire valve.

[0004] Although this patent can intuitively indicate the opening degree of the hazardous chemical fire valve, it still has the drawback of lacking an anti-loosening structure. Hazardous chemical media (such as strong acids, strong alkalis, organic solvents, etc.) are highly corrosive, and long-term contact will cause traditional sealing gaskets to age, crack, and swell, thereby destroying the integrity of the sealing structure. At the same time, the environment in which hazardous chemical pipelines are located is complex and is easily subjected to external forces such as equipment handling, personnel collisions, and earthquakes. Existing fire valves are only connected by flange bolts and lack a special anti-loosening limiting structure. The bolts are prone to loosening under long-term vibration or instantaneous external impact, and may even cause the flange connection to detach. The combination of the above two problems can easily lead to hazardous chemical leakage, causing not only economic losses, but also major safety accidents such as fires, explosions, and environmental pollution.

[0005] To address these issues, we offer fire valves for hazardous chemicals. Utility Model Content

[0006] The purpose of this utility model is to provide a fire valve for hazardous chemicals. By combining the connecting components and the anti-slip components, it solves the problem that existing fire valves for hazardous chemicals lack an anti-loosening structure, and that the connection between the pipeline and the fire valve is prone to loosening and sealing failure due to external forces.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a fire valve for hazardous chemicals, comprising a valve body, a valve stem at the top of the valve body, a connecting assembly on one side of the valve body, a pipe on one side of the connecting assembly, and an annular groove formed on the inner wall of the valve body. A sealing spring is fixedly connected to one side of the inner cavity of the annular groove, a sealing cylinder is fixedly connected to one end of the sealing spring, a movable disc is fixedly connected to one side of the sealing cylinder, an insert is fixedly connected to one side of the movable disc, an mounting plate is fixedly connected to the surface of the movable disc, a connecting cylinder is movably connected to the inner cavity of the movable disc, a flange is fixedly connected to one side of the connecting cylinder, insertion holes are formed on the surfaces of both the mounting plate and the flange, one side of the flange is fixedly connected to the surface of the pipe, and fixing rings are fixedly connected to both sides of the valve body surface, with long bolts fixedly connected to one side of each fixing ring.

[0009] The present invention is further configured such that the surface of the valve stem is provided with an anti-slip component, the anti-slip component including a first gear, the inner cavity of the first gear being fixedly connected to the surface of the valve stem, a threaded tube being movably connected to one side of the top of the valve body, a second gear being fixedly connected to the top of the threaded tube, and a fastening bolt being threadedly connected to the inner cavity of the threaded tube. When the valve stem rotates to the required opening, the fastening bolt is rotated to move downwards within the threaded tube, pressing the second gear to mesh with the first gear. After the gears mesh, a mechanical interlock is formed, preventing the valve stem from rotating accidentally. This structure effectively prevents the valve stem from loosening due to vibration or misoperation, ensures stable valve opening, improves control reliability during the transportation of hazardous chemicals, and avoids accidents caused by uncontrolled flow.

[0010] The present invention is further configured such that a turntable is fixedly connected to the top of the fastening bolt, and an anti-slip sleeve is fixedly connected to the surface of the turntable. The turntable and the anti-slip sleeve increase the friction between the operator's hand and the fastening bolt, making it easier to apply force to rotate the fastening bolt, improving the convenience and safety of operation. Especially in emergency situations, the valve stem can be quickly locked. The anti-slip sleeve design prevents the hand from slipping and enhances the efficiency of human-machine interaction.

[0011] The present invention is further configured such that mounting rings are fixedly connected to both sides of the valve body surface, and a fixing plate is fixedly connected to one side of the mounting ring. One side of the fixing plate is connected to the external structure. The stable structure formed by the mounting rings and the fixing plate improves the stability of the fire valve after installation.

[0012] The present invention is further configured such that a sealing groove is provided on one side of the flange, and a sealing ring is fixedly connected to one side of the movable disc. The sealing ring is embedded in the sealing groove on the flange to form a double sealing interface, which maintains a tight fit even when the medium pressure fluctuates or the temperature changes, significantly improving the sealing performance of the connection and preventing hazardous chemical media from leaking from the flange interface. It is suitable for highly corrosive and high-pressure working conditions.

[0013] The present invention is further configured such that a limiting groove is formed on the surface of the sealing cylinder, and a limiting ring is fixedly connected to one side of the inner cavity of the annular groove. The surface of the limiting ring is movably connected to the inner cavity of the limiting groove. The limiting ring and the limiting groove cooperate to limit the range of movement of the sealing cylinder in the axial direction, prevent it from falling out of the annular groove due to spring force or medium pressure, ensure that the sealing cylinder is always in the designed position, maintain the effective working state of the sealing spring, and improve the durability and reliability of the sealing structure.

[0014] The present invention is further configured such that a sealing ring is provided in the inner cavity of the movable disk, the inner wall of the sealing ring is in contact with the surface of the connecting cylinder, and the sealing ring fills the gap between the movable disk and the connecting cylinder to form a dynamic seal, which maintains the sealing effect even when the movable disk moves slightly.

[0015] The present invention is further configured such that a gasket is provided on one side of the mounting plate, and the surface of the gasket is provided with anti-slip particles. After the long bolt passes through the insertion hole on the surface of the mounting plate and the flange, a nut is screwed on one side of the surface of the long bolt. The gasket is placed between the mounting plate and the flange. The anti-slip particles increase the friction of the contact surface and prevent the mounting plate from slipping when under force.

[0016] The present invention has the following beneficial effects.

[0017] 1. This utility model uses an adaptive sealing structure composed of a sealing spring, a sealing cylinder, and a movable disc, combined with a double sealing design of a sealing ring and a sealing groove. This effectively compensates for changes in the sealing surface gap caused by medium corrosion, temperature changes, or pipeline vibration, significantly improving the sealing durability and reliability of the valve under conditions of strong corrosion and high pressure fluctuations. The fixed structure formed by the cooperation of long bolts and the insertion holes on the surface of the mounting plate and flange can prevent loosening at the connection between the pipeline and the fire valve.

[0018] 2. This utility model, by setting an anti-slip component consisting of a first gear, a second gear, and fastening bolts, can achieve mechanical interlocking after the valve stem is adjusted, effectively resisting external vibration and impact, and preventing the valve stem from rotating unexpectedly; at the same time, the use of a gasket with anti-slip particles between the mounting plate and the flange, combined with long bolts, greatly enhances the anti-loosening ability of the connection node. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a 3D diagram of a fire valve for hazardous chemicals.

[0021] Figure 2 Fire valves for hazardous chemicals Figure 1 A magnified view of a portion of point A in the middle.

[0022] Figure 3 This is a cross-sectional schematic diagram of a fire valve for hazardous chemicals.

[0023] Figure 4 Fire valves for hazardous chemicals Figure 3 A magnified view of a portion of point B in the middle.

[0024] Figure 5 This is a schematic diagram of the anti-slip component in a fire valve for hazardous chemicals.

[0025] In the attached diagram: 1. Valve body; 2. Valve stem; 3. Connecting assembly; 4. Pipeline; 301. Annular groove; 302. Sealing spring; 303. Sealing cylinder; 304. Movable disc; 305. Insert sleeve; 306. Mounting disc; 307. Connecting cylinder; 308. Flange; 309. Insertion hole; 310. Fixing ring; 311. Long bolt; 5. Anti-slip assembly; 501. First gear; 502. Threaded pipe; 503. Second gear; 504. Fastening bolt. Detailed Implementation

[0026] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figure 1-5 This utility model relates to a fire valve for hazardous chemicals, comprising a valve body 1, a valve stem 2 at the top of the valve body 1, a connecting assembly 3 on one side of the valve body 1, and a pipe 4 on one side of the connecting assembly 3. The connecting assembly 3 includes an annular groove 301, which is formed on the inner wall of the valve body 1. A sealing spring 302 is fixedly connected to one side of the inner cavity of the annular groove 301. A sealing cylinder 303 is fixedly connected to one end of the sealing spring 302. A movable disc 304 is fixedly connected to one side of the sealing cylinder 303. A plug 305 is fixedly connected to one side of the valve body 1. A mounting plate 306 is fixedly connected to the surface of the movable plate 304. A connecting cylinder 307 is movably connected to the inner cavity of the movable plate 304. A flange 308 is fixedly connected to one side of the connecting cylinder 307. A plug hole 309 is opened on the surface of both the mounting plate 306 and the flange 308. One side of the flange 308 is fixedly connected to the surface of the pipe 4. A fixing ring 310 is fixedly connected to both sides of the surface of the valve body 1. A long bolt 311 is fixedly connected to one side of the fixing ring 310.

[0028] Specifically: At the connection between valve body 1 and pipeline 4, the connecting assembly 3 continuously applies axial pressure to the sealing cylinder 303 via the sealing spring 302, pushing the movable disc 304 and mounting disc 306 to press tightly against the flange 308, forming an initial seal. When pipeline 4 experiences slight displacement due to temperature changes or external impacts, the sealing spring 302 automatically compensates, maintaining tight contact between the sealing surfaces. The sealing ring is embedded in the sealing groove of the flange 308, forming the first sealing barrier. Simultaneously, the sealing ring inside the movable disc 304 and the surface of the connecting cylinder 307 form a second dynamic seal, effectively preventing leakage of hazardous chemical media. The cooperation between the limiting ring and the upper limiting groove of the sealing cylinder 303 ensures that the sealing assembly will not dislodge from the annular groove 301 during axial movement, maintaining the stability of the sealing structure. The anti-slip granular gasket between the mounting disc 306 and the flange 308 further increases the friction of the contact surface, preventing slippage at the connection due to vibration. This connection structure not only solves the problem of traditional flange bolt connections being prone to loosening under vibration, but also significantly improves sealing reliability under strong corrosion and high pressure conditions through multiple sealing designs.

[0029] The valve stem 2 has an anti-slip assembly 5 on its surface. The anti-slip assembly 5 includes a first gear 501, the inner cavity of which is fixedly connected to the surface of the valve stem 2. A threaded tube 502 is movably connected to one side of the top of the valve body 1. A second gear 503 is fixedly connected to the top of the threaded tube 502. A fastening bolt 504 is threadedly connected to the inner cavity of the threaded tube 502. A turntable is fixedly connected to the top of the fastening bolt 504. An anti-slip sleeve is fixedly connected to the surface of the turntable. Mounting rings are fixedly connected to both sides of the surface of the valve body 1. A fixing plate is fixedly connected to one side of the mounting ring. A sealing groove is opened on one side of the flange 308. A sealing ring is fixedly connected to one side of the movable plate 304. A limit groove is opened on the surface of the sealing cylinder 303. A limit ring is fixedly connected to one side of the inner cavity of the annular groove 301. The surface of the limit ring is movably connected to the inner cavity of the limit groove. A sealing ring is provided in the inner cavity of the movable plate 304. The inner wall of the sealing ring is in contact with the surface of the connecting cylinder 307. A gasket is provided on one side of the mounting plate 306. The surface of the gasket is provided with anti-slip particles.

[0030] Specifically: When the valve stem 2 rotates to the required opening, the fastening bolt 504 is rotated, causing it to move downwards within the threaded tube 502, pressing the second gear 503 to mesh with the first gear 501. This gear meshing forms a mechanical interlock, preventing accidental rotation of the valve stem 2. This structure effectively prevents the valve stem 2 from loosening due to vibration or misoperation, ensuring stable valve opening, improving control reliability during hazardous chemical transport, and preventing accidents caused by flow control failure. The turntable and anti-slip sleeve increase the friction between the operator's hand and the fastening bolt 504, facilitating force application and rotation of the bolt, improving operational convenience and safety. Especially in emergencies, the valve stem 2 can be quickly locked. The anti-slip sleeve design prevents hand slippage and enhances human-machine interaction efficiency. One side of the fixing plate is connected to the external structure. The stable structure formed by the mounting ring and the fixing plate improves the stability of the fire valve after installation. The sealing ring is embedded in the sealing groove on the flange 308, forming a double sealing interface. Even when the medium pressure fluctuates or the temperature changes, it maintains a tight fit, significantly improving the sealing performance of the connection and preventing hazardous chemical media from leaking from the flange interface. It is suitable for highly corrosive and high-pressure conditions. The limiting ring and the limiting groove cooperate to limit the range of movement of the sealing cylinder 303 in the axial direction, preventing it from coming out of the annular groove 301 due to spring force or medium pressure, ensuring that the sealing cylinder 303 is always in the designed position, maintaining the effective working state of the sealing spring 302, and improving the durability and reliability of the sealing structure. The sealing ring fills the gap between the movable disc 304 and the connecting cylinder 307 to form a dynamic seal, which maintains the sealing effect even when the movable disc 304 moves slightly. After the long bolt 311 passes through the insertion hole 309 on the surface of the mounting disc 306 and the flange 308, the nut is screwed on one side of the surface of the long bolt 311. The gasket is placed between the mounting disc 306 and the flange 308. The anti-slip particles increase the friction of the contact surface and prevent the mounting disc 306 from slipping when under force.

[0031] The working principle of this utility model is as follows: When the valve needs to be connected to the pipeline 4, the flange 308 and the mounting plate 306 are fixed by long bolts 311. The sealing spring 302 pushes the sealing cylinder 303 and the movable plate 304 to press the flange 308, forming an initial seal. Under the action of medium pressure, the cooperation between the sealing ring and the sealing groove, as well as the contact between the sealing ring and the connecting cylinder 307, form a double sealing interface to ensure no leakage. After the valve stem 2 adjusts the valve opening, the second gear 503 meshes with the first gear 501 by rotating the fastening bolt 504, forming a mechanical interlock to prevent the valve stem 2 from rotating due to vibration or misoperation. The design of the fixing plate and the mounting ring enhances the overall installation stability of the valve. This solution effectively solves the two major technical problems mentioned in the background technology—corrosion and aging of the sealing gasket and easy loosening of the bolt connection—through spring self-compensation sealing, gear anti-loosening locking, and multiple sealing interfaces.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A fire valve for hazardous chemicals, comprising a valve body (1), characterized in that: A valve stem (2) is provided on the top of the valve body (1), a connecting component (3) is provided on one side of the valve body (1), and a pipe (4) is provided on one side of the connecting component (3). The connecting assembly (3) includes an annular groove (301) formed on the inner wall of the valve body (1). A sealing spring (302) is fixedly connected to one side of the inner cavity of the annular groove (301). A sealing cylinder (303) is fixedly connected to one end of the sealing spring (302). A movable disc (304) is fixedly connected to one side of the sealing cylinder (303). A plug cylinder (305) is fixedly connected to one side of the movable disc (304). An installation disc is fixedly connected to the surface of the movable disc (304). (306) The inner cavity of the movable disc (304) is movably connected to a connecting cylinder (307). A flange (308) is fixedly connected to one side of the connecting cylinder (307). Insertion holes (309) are provided on the surfaces of the mounting disc (306) and the flange (308). One side of the flange (308) is fixedly connected to the surface of the pipe (4). Fixing rings (310) are fixedly connected to both sides of the surface of the valve body (1). A long bolt (311) is fixedly connected to one side of the fixing ring (310).

2. The hazardous chemical fire valve according to claim 1, characterized in that: The surface of the valve stem (2) is provided with an anti-slip component (5). The anti-slip component (5) includes a first gear (501). The inner cavity of the first gear (501) is fixedly connected to the surface of the valve stem (2). A threaded tube (502) is movably connected to one side of the top of the valve body (1). A second gear (503) is fixedly connected to the top of the threaded tube (502). A fastening bolt (504) is threadedly connected to the inner cavity of the threaded tube (502).

3. The hazardous chemical fire valve according to claim 2, characterized in that: A turntable is fixedly connected to the top of the fastening bolt (504), and an anti-slip sleeve is fixedly connected to the surface of the turntable.

4. The hazardous chemical fire valve according to claim 1, characterized in that: Both sides of the valve body (1) are fixedly connected with mounting rings, and a fixing plate is fixedly connected to one side of the mounting rings.

5. The hazardous chemical fire valve according to claim 1, characterized in that: A sealing groove is provided on one side of the flange (308), and a sealing ring is fixedly connected to one side of the movable disc (304).

6. The hazardous chemical fire valve according to claim 1, characterized in that: A limiting groove is formed on the surface of the sealing cylinder (303), and a limiting ring is fixedly connected to one side of the inner cavity of the annular groove (301). The surface of the limiting ring is movably connected to the inner cavity of the limiting groove.

7. The hazardous chemical fire valve according to claim 1, characterized in that: The inner cavity of the movable disc (304) is provided with a sealing ring, and the inner wall of the sealing ring is in contact with the surface of the connecting cylinder (307).

8. The hazardous chemical fire valve according to claim 1, characterized in that: A gasket is provided on one side of the mounting plate (306), and the surface of the gasket is provided with anti-slip particles.

Images