Novel fire detection tube type fire extinguishing device container valve

Abstract

The utility model relates to a novel fire detection tube type fire extinguishing device container valve which comprises a valve body, a valve bonnet, a plug core, a pressure spring, a ball valve and a fire detection tube, a cylindrical cavity is arranged inside the valve body, a pressure relief opening and an inlet are respectively arranged at the upper end and the lower end of the valve body, an outlet and a detection opening are arranged on the side wall of the valve body, the outlet is communicated with the cavity, and the detection opening is communicated with a channel of the inlet. The valve bonnet is installed at the upper end of the valve body, a pressure relief through hole is formed in the valve bonnet, the diameter of the pressure relief through hole is smaller than that of the pressure relief opening, the pressure relief through hole is communicated with the pressure relief opening, the ball valve is installed on the valve bonnet, one end of the ball valve is communicated with the pressure relief through hole, and the other end of the ball valve is connected with the fire detection pipe. According to the container valve of the fire detection tube type fire extinguishing device, the structure of the ball valve and the fire detection tube is used, the container valve of a differential pressure type structure is formed, the container valve is simple in structure and easy to maintain, and the container valve can be repeatedly used by replacing loss parts.

Description

Technical Field

[0001] The utility model relates to the field of fire-fighting devices, in particular to a novel fire detection tube type fire extinguishing device container valve. Background Art

[0002] At present, fire detection tube type fire extinguishing devices are widely used in equipment and facilities such as variable distribution cabinets, battery cabinets, communication cabinets, mobile communication base stations, etc. However, in the prior art, many of the fire extinguishing devices used in fire-fighting facilities have complex structures, single functions, and high costs. However, for container valves with relatively simple structures, a large amount of fire extinguishing agent will leak out from the flow passage at one end of the fire detection tube, reducing the total flow rate of the fire extinguishing agent in the fire extinguishing spraying passage and lowering the use efficiency of the fire extinguishing agent. In view of this, this application is specifically proposed. Content of the Utility Model

[0003] To solve the above technical problems, the utility model discloses a novel fire detection tube type fire extinguishing device container valve, which includes a valve body, a valve cap, a plug core, a compression spring, a ball valve and a fire detection tube. A cylindrical cavity is arranged inside the valve body, and a pressure relief port and an inlet communicating with the cavity are respectively opened at the upper and lower ends. The diameter of the inlet is smaller than that of the cavity, forming a stepped channel at the lower end of the valve body. An outlet and a detection port are opened on the side wall of the valve body. The outlet communicates with the cavity, and the detection port communicates with the channel of the inlet. The detection port is obliquely arranged with respect to the inlet channel, forming an acute angle. The valve cap is installed at the upper end of the valve body, and a pressure relief through hole with a diameter smaller than that of the pressure relief port and communicating with it is arranged on the valve cap. The ball valve is installed on the valve cap, one end communicates with the pressure relief through hole, and the other end is connected to the fire detection tube. The plug core is arranged in the cavity and is in clearance fit with the cavity, and can block both the inlet and the outlet at the same time. A groove is arranged on the end face of the plug core facing the pressure relief port, and a through hole is opened at the axis. A steel wire is arranged in the through hole, and the steel wire forms a filling piece that reduces the passage area in the through hole. The compression spring is arranged in the cavity, one end abuts against the edge of the pressure relief through hole of the valve cap, and the other end abuts against the bottom of the groove, jointly forming a piston mechanism with the plug core in the cavity.

[0004] Specifically, a pressure gauge interface and a relief device interface are respectively arranged on both sides of the detection port. The pressure gauge interface and the relief device interface are arranged in a cross-shaped communication with the detection port, forming a four-way structure at the communication interface. A leakage signal feedback device is installed at the detection port.

[0005] Specifically, a boss is arranged on the end face of the plug core opposite to the groove, forming a plug core with a stepped shaft structure. The boss is a cylindrical structure and is in clearance fit with the channel of the inlet. A ring groove is opened on the circumference of the boss, and a sealing ring is installed in the ring groove, forming a sealing plug at the channel of the inlet.

[0006] Specifically, a ring groove is provided at the shaft shoulder of the stepped shaft structure plug core, and the notch of the ring groove faces the edge of the inlet at the lower end of the cavity. A sealing ring is provided in the ring groove to form a compression sealing structure.

[0007] Specifically, the through hole is a stepped hole, and at the end close to the compression spring, the diameter of the through hole is smaller than that of the through hole in the boss part, forming a stepped platform at the position of the diameter change in the middle section.

[0008] Specifically, one end of the steel wire facing the inlet is in a spiral shape, forming a nail-shaped structure with the end head that can be stuck on the stepped platform.

[0009] Specifically, the through hole and the pressure relief through hole are arranged coaxially.

[0010] Specifically, one end of the steel wire facing the pressure relief through hole exposes the pipe through hole and is arranged in a conical spiral shape. The length of the middle section of the steel wire is greater than the length of the smaller diameter section of the through hole.

[0011] Specifically, a circumferential triangular groove is provided on the outer side wall of the plug core. When the plug core is in the lower dead center position, the position of the triangular groove corresponds to the outlet.

[0012] Specifically, a starting signal feedback device interface is also provided on the side wall of the outlet. The starting signal feedback device interface is communicated with the outlet to form a tee structure.

[0013] Advantages and Effects

[0014] The container valve of the fire detection tube type fire extinguishing device in this application uses the structure of a ball valve and a fire detection tube to form a container valve with a differential pressure structure. The container valve structure of the present utility model is simple and easy to maintain, and the worn parts can be replaced and reused. By providing multiple shunt interfaces on different flow paths and installing a starting signal feedback device, a leakage signal feedback device, a safety relief device, and a pressure gauge on the interfaces, the functions of the container valve can be expanded. Through the set structure of the steel wire, the passage at one end of the ball valve and the fire detection tube can reduce the leakage of the fire extinguishing agent, but does not affect the operation mode of the differential pressure structure, ensuring stability while increasing the utilization rate of the fire extinguishing agent. Description of the Drawings

[0015] Figure 1 It is a front elevation sectional view of the container valve of the fire detection tube type fire extinguishing device of the present utility model;

[0016] Figure 2 It is a top view of the container valve of the fire detection tube type fire extinguishing device of the present utility model;

[0017] Figure 3 It is a structural schematic diagram of the plug core of the container valve of the fire detection tube type fire extinguishing device of the present utility model.

[0018] Legend: 1. Valve body; 11. Cavity; 12. Pressure relief port; 13. Inlet; 14. Outlet; 15. Detection port; 16. Pressure gauge interface; 17. Drainage device interface; 2. Valve cap; 21. Pressure relief through-hole; 3. Plug core; 31. Groove; 32. Through-hole; 33. Steel wire; 34. Boss; 35. Triangular groove; 4. Compression spring; 5. Ball valve; 6. Fire detection tube; 7. Leakage signal feedback device; 8. Start signal feedback device interface. Detailed implementation mode

[0019] The following further describes the present utility model in conjunction with embodiments, but is not limited to the content in the specification.

[0020] As Figures 1 to 3As shown, the utility model relates to a novel fire-detecting tube type fire extinguishing device container valve, which comprises a valve body 1, a valve cap 2, a plug core 3, a compression spring 4, a ball valve 5 and a fire-detecting tube 6. A cylindrical cavity 11 is arranged inside the valve body 1, and a pressure relief port 12 and an inlet 13 communicating with the cavity 11 are respectively arranged at the upper and lower ends. The diameter of the inlet 13 is smaller than the diameter of the cavity 11, and a stepped channel is formed at the lower end of the valve body 1. An outlet 14 and a detection port 15 are arranged on the side wall of the valve body 1. The outlet 14 is communicated with the cavity 11, and the detection port 15 is communicated with the channel of the inlet 13, and the detection port 15 is obliquely arranged with the channel of the inlet 13 to form an acute angle. The valve cap 2 is installed at the upper end of the valve body 1, and a pressure relief port 12 and an inlet 13 with a diameter smaller than that of the pressure relief port 12 are arranged on the valve cap 2. The ball valve 5 is installed on the valve bonnet 2, one end of which is connected to the pressure relief through hole 21, and the other end is connected to the fire detection tube 6. The plug core 3 is arranged in the cavity 11 and has a clearance fit with the cavity 11, and can block the inlet 13 and the outlet 14 at the same time. A groove 31 is provided on the end surface of the plug core 3 facing the pressure relief port 12, and a through hole 23 is opened at the axis, a steel wire 33 is provided in the through hole 23, and the steel wire 33 forms a filling piece in the through hole 23 to reduce the passage area. The compression spring 4 is arranged in the cavity 11, one end of which abuts against the edge of the pressure relief through hole 21 of the valve bonnet 2, and the other end abuts against the bottom of the groove 31, and together with the plug core 3 forms a piston mechanism in the cavity 11. A valve body 1 having a cavity 11, a pressure relief port 12, an inlet 13 and an outlet 14 forms a three-way structure. The flow direction of the fire extinguishing agent enters the cavity 11 from the inlet 13, and then the flow can flow out of the valve body 1 from the outlet 14 and the pressure relief port 12 respectively. A valve cap 2 and a ball valve 5 are installed on the upper part of the valve body 1, which can extend the outflow channel of the pressure relief port 12, and the channel has a closing function through the ball valve 5. Another fluid passage is a flow channel from the inlet 13 to the outlet 14. The plug core 3 inside the cavity 11 moves up and down to achieve the function of opening and closing the flow channel. Specifically, in the unactivated state, the plug core 3 is pressed at the lowermost inlet 13 by the pressure of the upper compression spring 4, and at this position, the end of the plug core is pressed at the position of the inlet 13, and its side blocks the outlet 14, thereby achieving the function of closing the outlet 14. When it is needed to start, the compression spring 4 is compressed to the shortest state, and the plug core 3 reaches the top dead center position. When the plug core 3 is at the top dead center position, the end of the plug core 3 is away from the inlet, and the side will no longer block the outlet 14. The passage from the inlet 13 to the outlet 14 is completely opened to realize the passage flow. In order to realize the change of the upper and lower positions of the plug core 3, the change of pressure difference is used to achieve this effect in the utility model. Specifically, a fire detection tube 6 is also installed on the ball valve 4, that is, the end of the pressure relief port 12 is in a blocked state and is not connected to the outside world. At the same time, a through hole 23 is opened in the center of the plug core 3, so that the fire extinguishing agent can pass from the through hole 23 to one end of the fire detection tube 6. The diameter of the through hole 23 in the present application is set to 1 mm. When in use, the container valve is installed at the position of the fire extinguishing agent source, and the ball valve is opened, and the fire extinguishing agent flows from the through hole 23 to one end of the fire detection tube 6.At this time, the pressure from the fire extinguishing agent source to the valve body and then to one end of the fire detection tube is the same. Without being affected by the differential pressure, the compression spring 4 rebounds and pushes the plug core 3 to the lower end of the valve body 1, that is, one end of the inlet 13. At this time, the plug core blocks the outlet 14, and the flow path is closed. When a fire breaks out, one end of the fire detection tube 6 will communicate with the outside. At this time, the pressure above the plug core 3 becomes smaller, and the flow rate of the through hole 23 on the plug core is much smaller than the speed of the air pressure drop after the end of the fire detection tube 6 is opened. This results in a large pressure difference at both ends of the plug core. The pressure of the fire extinguishing agent source is much greater than the pressure required to compress the compression spring, achieving the effect of pushing the plug core 3 and compressing the compression spring. At this time, the outlet 14 is opened, enabling the fire extinguishing agent to flow from the inlet to the outlet. To further reduce the flow rate of the fire extinguishing agent flowing through the through hole 23, a steel wire 33 is placed in the through hole 23 to further reduce the flow area, which can reduce the leakage of the fire extinguishing agent from here to one end of the fire detection tube. The diameter of the steel wire 33 is 0.7 mm. A groove 31 is provided on the upper part of the plug core to hold the compression spring and fix its end position, preventing the generation of an angle and causing smooth up and down movement of the plug core. The detection port 15 remains blocked during use. The detection port 15 is set obliquely so that the port is higher than the lower end face of the plug core 3 in the lower dead position. In this way, in the static non-use state, the channel of the detection port 15 is filled with the fire extinguishing agent, and the uppermost part is at a high position. When the fire extinguishing agent is released, the pressure decreases, and the high-position fire extinguishing agent in the channel of the detection port 15 drops first, and the channel of the detection port 15 is filled last when filling the fire extinguishing agent, which can sensitively show the pressure state of the fire extinguishing agent source.,

[0021] On both sides of the detection port 15, a pressure gauge interface 16 and a relief device interface 17 are respectively provided. The pressure gauge interface 16 and the relief device interface 17 are connected to the detection port 15 in a cross shape, forming a four-way structure at the connection interface. A leakage signal feedback device 7 is installed on the detection port 15. The pressure gauge interface 16 and the relief device interface 17 serve as the diversion ports of the detection port 15. The cross shape setting can ensure that the port of the detection port channel remains at a high position, and can ensure that the leakage signal feedback device 7 installed on the detection port 15 can sensitively feedback the pressure state of the fire extinguishing agent source and can give an alarm sensitively when leaking. Specifically, the leakage signal feedback device 7 is a pressure alarm device with a diaphragm structure. The pressure gauge interface 16 and the relief device interface 17 can respectively install a pressure gauge and a safety relief device to display the pressure value of the fire extinguishing source and to safely relieve pressure when overpressure occurs during operation, ensuring the safe application of the device.

[0022] The end face of the plug core 3 opposite to the groove 31 is provided with a boss 34, forming a plug core 3 with a stepped shaft structure. The boss 34 is a cylindrical structure and is in clearance fit with the channel of the inlet 13. The boss 34 is circumferentially provided with a ring groove, and a sealing ring is installed in the ring groove, forming a sealing plug in the channel of the inlet 13. The setting of the boss 34 enables the boss 34 to enter the inlet 13 when the plug core 3 is pushed to the lower dead position by the compression spring 4. On the one hand, it plays a role in positioning or limiting the plug core 3. On the other hand, the end face position of the boss 34 can further ensure that the end face position is lower than the highest position of the port of the channel of the inlet 13. Setting an inlet ring groove on the outer periphery of the boss 34 and installing a sealing ring can effectively ensure the sealing performance of the device.

[0023] In order to further improve the sealing effect of the device, a ring groove is provided at the shoulder of the stepped shaft structure of the plug core 3, and the notch of the ring groove faces the edge of the inlet 13 at the lower end of the cavity 11. A sealing ring is provided in the ring groove, forming a compression sealing structure. Specifically, the compression pressure is provided by the structure of the compression spring 4 pressing against the plug core. A sealing ring is installed at the shoulder position, and the sealing ring is in a compressed state during use, increasing the degree of fitting with the sealing surface. Cooperating with the sealing ring on the outer circle of the boss 34, the overall sealing of the device is improved.

[0024] The through hole 23 is a stepped hole. At the end close to the compression spring 4, the diameter of the through hole 23 is smaller than the diameter of the through hole 23 of the boss 34 part, forming a stepped platform at the middle diameter-changing position. The structure of the stepped hole can buffer the pressure of the fire extinguishing agent when passing through during the pressure relief or pressurization process, preventing the spray flow rate at the outlet end from being too large when the fire extinguishing agent flows through the through hole.

[0025] As Figure 3 shown, the end of the steel wire 33 facing the inlet 13 is in a spiral shape, forming a nail-like structure with the end head that can be stuck on the stepped platform. The setting of the nail-like structure can ensure that when the fire extinguishing agent flows through the through hole under high pressure, the end will be stuck at the position of the stepped platform and will not carry the nail away, so that the steel wire 33 will remain at the position of the through hole 3. However, when being pressed, the nail-like end head presses on the stepped platform, and the end of the steel wire 33 coiled into a spiral shape will not affect the flow of the fire extinguishing agent, and will also reduce the flow rate of the fire extinguishing agent to a certain extent, reducing the leakage of the fire extinguishing agent from the through hole and allowing more to flow away from the outlet 14, improving the utilization rate of the fire extinguishing agent;

[0026] Further, in order to reduce the leakage of the fire extinguishing agent, the through hole 23 and the pressure relief through hole 21 are coaxially arranged; one end of the steel wire 33 facing the pressure relief through hole 21 exposes the pipe through hole and is arranged in a conical spiral shape, and the length of the middle section of the steel wire 33 is greater than the length of the smaller diameter section of the through hole 23. During use, for the steel wire wound into a spiral cone, this part can enter the pressure relief through hole 21 to reduce the flow area of the through hole in the pressure relief through hole 21. Cooperating with the spiral end head that abuts against the stepped hole of the through hole 23 at the other end of the plug core, the flow rate is reduced at the ports and apertures of the two sections respectively, and the leakage amount of the fire extinguishing agent is minimized to the greatest extent. The specific way for the spiral cone-shaped steel wire to enter the pressure relief through hole 21 is as follows: when the pressures at the upper and lower ends of the plug core are equal, the steel wire drops vertically under the action of gravity, but the upper part of the spiral cone is stuck at the pipe through hole to prevent it from falling. After the fire detection tube is activated, the passage is opened, the pressure at the upper part of the plug core rapidly decreases to generate a pressure difference, the pressure of the fire extinguishing agent pushes the plug core and at the same time pushes the spiral end at the lower end of the steel wire. Because the middle section is left longer, the upper spiral cone-shaped end head moves upward together due to the upward movement trend of the plug core and the steel wire. During the upward movement, the tip of the cone is easier to align with the diameter of the pressure relief through hole 21, facilitating the entry of the latter section and achieving the function of blocking the passage of the pressure relief through hole 21.

[0027] On the outer side wall of the plug core 3, a circumferential triangular groove 34 is provided, and when the plug core 3 is in the lower stop position, the position of the triangular groove 34 corresponds to the outlet 14. When the plug core 3 is in the lower stop position, the position of the triangular groove 34 can correspond to the outlet 14. In this position, the triangular groove can reduce the friction area between the outer wall of the plug core and the inner wall of the valve body 1, reduce the frictional force, and facilitate the up and down sliding of the formed piston structure. The triangular groove can have a large opening spacing and reduce the friction area more, but has a very small impact on the overall strength and stability of the plug core.

[0028] On the side wall of the outlet 14, a starting signal feedback device interface 8 is also provided, and the starting signal feedback device interface 8 is communicated with the outlet 14 to form a tee structure. Install a starting signal feedback device at the position of the starting signal feedback device interface 8 to understand the starting state of the device or whether there is fire extinguishing agent flowing through.

[0029] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A new type of fire detection tube type fire extinguishing device container valve, characterized by: It comprises a valve body (1), a valve bonnet (2), a plug core (3), a compression spring (4), a ball valve (5) and a fire detection tube (6). The valve body (1) is provided with a cylindrical cavity (11) inside, and a pressure relief port (12) and an inlet (13) communicating with the cavity (11) are respectively provided at the upper and lower ends. The diameter of the inlet (13) is smaller than the diameter of the cavity (11). A stepped channel is formed at the lower end of the valve body (1). An outlet (14) and a detection port (15) are provided on the side wall of the valve body (1). The outlet (14) is communicated with the cavity (11), and the detection port (15) is communicated with the channel of the inlet (13). The detection port (15) and the inlet (13) channel are arranged obliquely to form an acute angle. The valve bonnet (2) is installed at the upper end of the valve body (1). The valve bonnet (2) is provided with a pressure relief port (12) having a diameter smaller than that of the pressure relief port (12) and communicating with the pressure relief port (12). The ball valve (5) is mounted on the valve cap (2), one end of which is connected to the pressure relief hole (21) and the other end of which is connected to the fire detection tube (6). The plug core (3) is arranged in the cavity (11) and is clearance-matched with the cavity (11), and can block the inlet (13) and the outlet (14) at the same time. A groove (31) is arranged on the end surface of the plug core (3) facing the pressure relief port (12), and a through hole (23) is opened at the axis. A steel wire (33) is arranged in the through hole (23), and the steel wire (33) forms a filling member in the through hole (23) to reduce the passage area. The compression spring (4) is arranged in the cavity (11), one end of which abuts against the edge of the pressure relief hole (21) of the valve cap (2), and the other end abuts against the bottom of the groove (31), and together with the plug core (3) forms a piston mechanism in the cavity (11).

2. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: A pressure gauge interface (16) and a discharge device interface (17) are respectively provided on both sides of the detection port (15); the pressure gauge interface (16) and the discharge device interface (17) are connected to the detection port (15) in a cross shape, forming a four-way structure at the connection interface; and the detection port (15) is installed with a leakage signal feedback device (7).

3. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: The end surface of the plug core (3) opposite to the groove (31) is provided with a boss (34), forming a plug core (3) with a stepped shaft structure. The boss (34) is a cylindrical structure and is clearance-matched with the channel of the inlet (13). The boss (34) is provided with an annular groove in the circumference, and a sealing ring is installed in the annular groove, forming a sealing plug in the channel of the inlet (13).

4. The novel fire detection tube type fire extinguishing device container valve according to claim 3 is characterized in that: An annular groove is provided at the shaft shoulder of the stepped shaft structure plug core (3), and the notch of the annular groove faces the edge of the inlet (13) at the lower end of the cavity (11). A sealing ring is provided in the annular groove to form a compression sealing structure.

5. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: The through hole (23) is a stepped hole and is close to one end of the compression spring (4). The diameter of the through hole (23) is smaller than the diameter of the through hole (23) at the boss (34), and a stepped platform is formed at the middle diameter change position.

6. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: One end of the steel wire (33) facing the inlet (13) is in a spiral shape, forming a nail-like structure whose end can be stuck on the stepped platform.

7. The novel fire detection tube type fire extinguishing device container valve according to claim 6 is characterized in that: The through hole (23) and the pressure relief through hole (21) are coaxially arranged correspondingly.

8. The novel fire detection tube type fire extinguishing device container valve according to claim 7 is characterized in that: One end of the steel wire (33) facing the pressure relief through hole (21) is exposed from the tube through hole and is arranged in a conical spiral. The length of the middle section of the steel wire (33) is greater than the length of the smaller aperture section of the through hole (23).

9. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: A circle of triangular grooves (35) are provided on the outer side wall of the plug core (3) along the circumferential direction. The plug core (3) is in the lower stop position, and the position of the triangular grooves (35) corresponds to the outlet (14).

10. The novel fire detection tube type fire extinguishing device container valve according to claim 1 is characterized in that: A start signal feedback device interface (8) is also provided on the side wall of the outlet (14), and the start signal feedback device interface (8) is connected to the outlet (14) to form a three-way structure.

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