One-way check valve with fire retardance function

Abstract

The utility model discloses a one-way check valve with a fire retardance function, which comprises a valve body, a conveying hole, a spring mounting hole, a first middle hole, a second middle hole, a threaded hole, a pressure limiting spring, an inner core, a cylindrical bulge, an inner core pressing ring and a fire retardance sheet, and an O-shaped ring is arranged between the inner core and the inner core pressing ring. According to the utility model, the cylindrical bulge is conveniently matched with the central hole of the inner core pressing ring, and the fire retardant sheet is arranged at the rear end of the inner core pressing ring, so that the design structure is simple, the production and the processing are simple and convenient, and when equipment works normally, liquid or gas can be conveyed in a normal direction through the one-way check valve; when the equipment has an emergency situation and a fire occurs in a pipeline at one end, the fire-retardant sheet in the one-way check valve can prevent open fire from extending, and a non-return function is matched, so that a passage is quickly cut off, and faults or dangerous cases of the equipment are prevented or reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and particularly relates to a one-way check valve with a fire-blocking function. Background Art

[0002] The existing one-way check valve has a single function, only having the one-way check function; in the actual market, additional functions need to be added to meet the requirements for special use scenarios. For example, when transporting combustible liquids and gases, an additional fire-blocking function is required to improve safety. The existing one-way check valve does not have this function and cannot block fire, easily causing equipment failures or dangerous situations.

[0003] Therefore, improvements must be made to the above-mentioned defects. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a one-way check valve with a fire-blocking function to solve the problems in the background art.

[0005] To solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A one-way check valve with a fire-blocking function includes a cylindrical valve body. A communicating conveying hole, a spring installation hole, a first intermediate hole, a second intermediate hole, and a threaded hole are sequentially arranged in the valve body from front to back. The conveying hole, the spring installation hole, the first intermediate hole, the second intermediate hole, and the threaded hole are on the same axis. The diameters of the conveying hole, the spring installation hole, the first intermediate hole, the second intermediate hole, and the inner diameter of the threaded hole increase in sequence. A pressure-limiting spring is arranged in the spring installation hole, and the rear end of the pressure-limiting spring extends to the rear end of the first intermediate hole. An inner core is arranged at the rear end of the first intermediate hole and is clamped on the pressure-limiting spring. The front end of the inner core is clamped at the rear end of the pressure-limiting spring. A cylindrical protrusion is arranged in the middle of the rear end face of the inner core. An inner core pressing ring and a fire-blocking sheet are sequentially arranged in the second intermediate hole from front to back. The rear end of the cylindrical protrusion is arranged in the central hole of the inner core pressing ring. An O-ring is arranged between the inner core and the inner core pressing ring.

[0007] Further, a chamfer is arranged at the rear end of the cylindrical protrusion.

[0008] Further, the fire-blocking sheet is a stainless steel fire-blocking sheet.

[0009] Further, a clamping groove is arranged at the front end of the inner core and is matched with the pressure-limiting spring for clamping.

[0010] Further, a connecting groove is arranged at the front end of the outer wall of the valve body.

[0011] Further, a hexagonal sleeve is provided in the middle of the outer wall of the valve body, and the hexagonal sleeve is integrally formed with the valve body.

[0012] Advantages of the present utility model:

[0013] With the above technical solution, since it is convenient to match the cylindrical protrusion with the central hole of the inner core pressing ring, and a fireproof sheet is arranged at the rear end of the inner core pressing ring, the design structure is simple, the production and processing are convenient, and when the equipment is working normally, the liquid or gas can be transmitted in the normal direction through the one-way check valve; when an emergency occurs in the equipment and a fire breaks out in one of the pipelines, the fireproof sheet inside the one-way check valve can prevent the open fire from spreading, and cooperate with the check function to quickly cut off the passage, preventing or reducing the occurrence of equipment failures or dangers. Description of the drawings

[0014] Figure 1 Schematic three-dimensional structure diagram of an embodiment of a one-way check valve with a fireproof function according to the present utility model;

[0015] Figure 2 Schematic rear view structure diagram of an embodiment of a one-way check valve with a fireproof function according to the present utility model;

[0016] Figure 3 Exploded structure diagram of an embodiment of a one-way check valve with a fireproof function according to the present utility model;

[0017] Figure 4 Schematic cross-sectional structure diagram of the valve body in a one-way check valve with a fireproof function according to the present utility model;

[0018] Figure 5 Schematic structure diagram of a one-way check valve with a fireproof function according to the present utility model in a closed state;

[0019] Figure 6 Schematic structure diagram of a one-way check valve with a fireproof function according to the present utility model in an open working state.

[0020] Reference numerals of the drawings and their descriptions:

[0021] 1. Connection groove; 2. Hexagonal sleeve; 3. Valve body; 4. Threaded hole; 5. Fireproof sheet; 6. Pressure-limiting spring; 7. Card slot; 8. Inner core; 9. Cylindrical protrusion; 10. Chamfer; 11. O-ring; 12. Inner core pressing ring; 13. Delivery hole; 14. Spring installation hole; 15. First intermediate hole; 16. Second intermediate hole; 17. Threaded hole; A. Flow direction; B. Check direction. Detailed implementation manners

[0022] The following further describes the specific embodiments of the present utility model in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Referring to Figures 1 to 6 , a one-way check valve with a fire-blocking function provided by the present utility model includes a cylindrical valve body 3. A communicating conveying hole 13, a spring installation hole 14, a first intermediate hole 15, a second intermediate hole, and a threaded hole 17 are sequentially arranged in the valve body 3 from front to back. The conveying hole 13, the spring installation hole 14, the first intermediate hole 15, the second intermediate hole 16, and the threaded hole 17 are on the same axis. The diameter of the conveying hole 13, the diameter of the spring installation hole 14, the diameter of the first intermediate hole 15, the diameter of the second intermediate hole 16, and the inner diameter of the threaded hole 17 increase in sequence. A pressure-limiting spring 6 is arranged in the spring installation hole 14. The rear end of the pressure-limiting spring 6 extends to the rear end of the first intermediate hole 15. An inner core 8 is arranged at the rear end of the first intermediate hole 15 and is clamped on the pressure-limiting spring 6. The front end of the inner core 8 is clamped on the rear end of the pressure-limiting spring 6. A cylindrical protrusion 9 is arranged in the middle of the rear end face of the inner core 8. An inner core pressing ring 12 and a fire-blocking sheet 5 are sequentially arranged in the second intermediate hole 16 from front to back. The rear end of the cylindrical protrusion 9 is arranged in the central hole of the inner core pressing ring 12. An O-ring 11 is arranged between the inner core 8 and the inner core pressing ring 12. The front end of the pressure-limiting spring 6 is just clamped in the spring installation hole 14, so that the pressure-limiting spring 6 is not easy to move. The outer diameter of the pressure-limiting spring 6 is smaller than the inner diameter of the first intermediate hole 15, so as to ensure the transmission of liquid or gas.

[0024] This technical solution is convenient by adopting the cooperation of the cylindrical protrusion 9 and the central hole of the inner core pressing ring 12, and then a fire-blocking sheet 5 is arranged at the rear end of the inner core pressing ring 12. Such a design has a simple structure and is easy to produce and process. When the equipment works normally, the liquid or gas can be transmitted in the normal direction through the one-way check valve; when an emergency occurs in the equipment and a fire breaks out in one of the pipelines, the fire-blocking sheet 5 inside the one-way check valve can prevent the spread of open fire, and cooperate with the check function to quickly cut off the passage, preventing or reducing equipment failures or risks.

[0025] A chamfer 10 is arranged at the rear end of the cylindrical protrusion 9. The chamfer 10 facilitates the cylindrical protrusion 9 to enter the central hole of the inner core pressing ring 12, and the contact between the inner core 8 and the inner core pressing ring 12 achieves the check function.

[0026] For example, in some embodiments, the flame retardant sheet 5 is a stainless steel flame retardant sheet. This can prevent the spread of open flames, cooperate with the check valve function, quickly cut off the passage, and prevent or reduce equipment failures or dangerous situations.

[0027] For example, in some embodiments, a clamping groove 7 is provided at the front end of the inner core 8 and is engaged with the pressure limiting spring 6. The clamping groove 7 facilitates quickly clamping the inner core 8 at the rear end of the pressure limiting spring 6.

[0028] For example, in some embodiments, a connection groove 1 is provided at the front end of the outer wall of the valve body 3. This facilitates the quick connection of the front end of the valve body 3 to the connection end through the connection groove 1.

[0029] For example, in some embodiments, a hexagonal sleeve 2 is provided in the middle of the outer wall of the valve body 3, and the hexagonal sleeve 2 is integrally formed with the valve body 3. This facilitates turning the valve body 3 through a tool such as a wrench and facilitates the connection of the valve body 3 with other connecting parts.

[0030] In summary, the present utility model is convenient by using the cooperation of the cylindrical protrusion and the central hole of the inner core pressing ring, and a flame retardant sheet is arranged at the rear end of the inner core pressing ring. The designed structure is simple and the production and processing are convenient. When the equipment is working normally, the liquid or gas can be transmitted in the normal direction through the one-way check valve; when an emergency occurs in the equipment and a fire breaks out in one of the pipelines, the flame retardant sheet inside the one-way check valve can prevent the spread of open flames, and cooperate with the check valve function to quickly cut off the passage, preventing or reducing equipment failures or dangerous situations.

[0031] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A one-way check valve with fire-blocking function, characterized in that: The valve body comprises a cylindrical valve body, wherein a communicating delivery hole, a spring mounting hole, a first middle hole, a second middle hole and a threaded hole are sequentially arranged in the valve body from front to back, the delivery hole, the spring mounting hole, the first middle hole, the second middle hole and the threaded hole are on the same axis, the diameters of the delivery hole, the diameters of the spring mounting hole, the diameters of the first middle hole, the diameters of the second middle hole and the inner diameters of the threaded hole increase sequentially, a pressure-limiting spring is arranged in the spring mounting hole, the rear end of the pressure-limiting spring extends to the rear end of the first middle hole, an inner core is provided at the rear end of the first middle hole, the front end of the inner core is clamped on the rear end of the pressure-limiting spring, a cylindrical protrusion is provided in the middle of the rear end surface of the inner core, an inner core pressure ring and a fire-blocking plate are sequentially arranged in the second middle hole from front to back, the rear end of the cylindrical protrusion is arranged in the center hole of the inner core pressure ring, and an O-ring is provided between the inner core and the inner core pressure ring.

2. The one-way check valve with fire-blocking function according to claim 1, characterized in that: The rear end of the cylindrical protrusion is provided with a chamfered right angle.

3. The one-way check valve with fire-blocking function according to claim 1, characterized in that: The fire barrier is a stainless steel fire barrier.

4. The one-way check valve with fire-blocking function according to claim 1, characterized in that: The front end of the inner core is provided with a clamping groove which is matched with the pressure-limiting spring.

5. The one-way check valve with fire-blocking function according to claim 1, characterized in that: A connecting groove is provided at the front end of the outer wall of the valve body.

6. The one-way check valve with fire-blocking function according to claim 1, characterized in that: A hexagonal sleeve is provided in the middle of the outer wall of the valve body, and the hexagonal sleeve is integrally formed with the valve body.

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