A temperature-sensing self-starting fire extinguishing device

Abstract

The present invention discloses a temperature-sensing self-starting fire extinguishing device, comprising a flexible fire extinguishing pipe, an end-blocking structure, a valve structure, a transfer filling structure, and a signal feedback structure; the end-blocking structure is installed at the tail end of the flexible fire extinguishing pipe; the valve structure is installed at the head end of the flexible fire extinguishing pipe; when filling the fire extinguishing agent, the valve structure is connected to the transfer filling structure, and when the fire extinguishing agent is filled to the standard, the valve structure is closed; in the working state, the valve structure is connected to the signal feedback structure, and the signal feedback structure includes a push rod, a push rod spring, and a contact switch. The push rod overcomes the force of the push rod spring and pushes the contact switch to send a normal signal outward. When the flexible fire extinguishing pipe is pyrolyzed by high temperature, the internal cavity pressure of the flexible fire extinguishing pipe disappears, the push rod is reset under the action of the push rod spring, disengages the contact switch, and the contact switch signal disappears. The present invention can achieve flexible installation in a small space, automatically release the fire extinguishing agent in the event of a fire, and can also issue a fire alarm.

Description

Technical Field

[0001] The invention relates to a temperature-sensing self-starting fire extinguishing device used in the field of fire safety of electrical cabinets. Background Art

[0002] Currently, for firefighting operations requiring cleanliness or within electrical cabinets, traditional fire-detection tube-type fire extinguishing devices are primarily used. This requires drilling a hole in the cabinet from the outside, inserting the fire-detection tube into the cabinet, and connecting a high-pressure fire extinguishing agent cylinder to extinguish the fire. This method is suitable for applications with limited space and independent protection units, such as small distribution cabinets, small control cabinets, and metering cabinets. Because the protected space is relatively small and the required amount of fire extinguishing agent is relatively limited, there is often no spare space on-site, nor is it necessary to maintain a permanent supply of high-pressure fire extinguishing agent cylinders. Fire extinguishing agents must be drawn from the equipment's storage location. This negatively impacts the effectiveness of firefighting. If a fire breaks out and cannot be extinguished in its early stages, it will inevitably result in significant losses. Furthermore, existing fire-fighting equipment is stored independently and lacks interaction with the monitoring system, making it impossible to monitor and control equipment usage in real time. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a temperature-sensing self-starting fire extinguishing device which can be flexibly installed in a small space, automatically releases fire extinguishing agent in case of fire, and can also issue a fire alarm.

[0004] A technical solution to achieve the above object is: a temperature-sensing self-starting fire extinguishing device, comprising a flexible fire extinguishing pipe, an end blocking structure, a valve structure, a transfer filling structure and a signal feedback structure;

[0005] The tail of the flexible fire extinguishing pipe is equipped with an end sealing structure for sealing, and the head of the flexible fire extinguishing pipe is equipped with a valve structure. The valve cavity of the valve structure is connected to the inner cavity of the flexible fire extinguishing pipe. The valve cavity is closed by a one-way valve ejector pin, and a return spring is provided on the one-way valve ejector pin.

[0006] When filling the flexible fire extinguishing pipe with fire extinguishing agent, the valve structure is connected to the air inlet pipe through the transfer filling structure. When the transfer filling structure is operated, the one-way valve pin is pushed open, thereby connecting the inner cavity of the flexible fire extinguishing pipe, the valve cavity and the air passage of the transfer filling structure. The fire extinguishing agent is pressurized and poured into the flexible fire extinguishing pipe from the air inlet pipe. When the fire extinguishing agent filling weight reaches the required weight, the transfer filling structure is operated, and the one-way valve pin is automatically closed under the action of the return spring to prevent the fire extinguishing agent from leaking out.

[0007] After the flexible fire extinguishing pipe is filled with fire extinguishing agent, the transfer filling structure is removed, and the valve structure is connected to the signal feedback structure. The signal feedback structure includes a push rod, a push rod spring and a contact switch. The inner cavity of the signal feedback structure is connected to the valve cavity and the inner cavity of the flexible fire extinguishing pipe. The push rod overcomes the force of the push rod spring under the action of air pressure, pushes open the contact switch and sends a normal signal to the outside. When the flexible fire extinguishing pipe is cracked by high temperature, the inner cavity pressure of the flexible fire extinguishing pipe disappears, and the push rod is reset under the action of the push rod spring, disengaging the contact switch, and the contact switch signal disappears.

[0008] Furthermore, a lock nut is embedded inside the inlet end of the flexible fire extinguishing pipe, a sealing ring is provided between the lock nut and the flexible fire extinguishing pipe, and a lock sleeve is provided outside the flexible fire extinguishing pipe.

[0009] Furthermore, the lock nut and the lock sleeve are threadedly connected, and the sealing ring is squeezed through the threaded connection.

[0010] Furthermore, the valve structure includes a valve body, a one-way valve ejector pin, a return spring and a sealing gasket. The one-way valve ejector pin presses the sealing gasket under the action of the return spring, thereby maintaining the sealing surface.

[0011] Furthermore, the return spring is a pagoda spring.

[0012] Furthermore, the transfer filling structure includes a quick connector, and rotating the quick connector causes the transfer filling structure to press downward toward the ejector pin side of the one-way valve to generate pressure.

[0013] Furthermore, the signal feedback structure and the protective cap are connected and fixed by pins.

[0014] Furthermore, a limit block is provided between the push rod and the protective cap to adjust the compression force of the push rod spring.

[0015] Furthermore, the end sealing structure includes an end plugging cap, which is provided with an inner liner, an O-ring and a nut. The inner liner is installed inside the flexible fire extinguishing pipe to support the strength of the flexible fire extinguishing pipe. By tightening the nut, the O-ring is squeezed to increase the friction and sealing between the O-ring and the flexible fire extinguishing pipe, thereby achieving the end sealing function.

[0016] Furthermore, the flexible fire extinguishing hose is made of plastic.

[0017] The temperature-sensing self-starting fire extinguishing device of the present invention has the following advantages:

[0018] 1. Traditional fire detection tubes rely on the pressure inside the fire extinguishing agent bottle to release the fire extinguishing agent in a temperature-sensitive manner. This results in a complex overall structure and poor applicability in confined spaces. This invention changes the structural dimensions of the fire detection tube and the design of its inlet and outlet, allowing the tube to function as an independent fire extinguishing agent storage device while also providing temperature sensing and detection capabilities.

[0019] 2. The present invention is designed with a one-way valve structure, which can automatically seal the tube when there is no external force to push it open. After filling, the fire extinguishing agent can be stored independently without the need for an additional storage bottle.

[0020] 3. The present invention increases friction by tightening and squeezing the sealing ring through threads, thereby improving sealing performance and also increasing the strength against internal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a general assembly diagram of a temperature-sensing self-starting fire extinguishing device of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation of the end of a flexible fire extinguishing pipe of a temperature-sensing self-starting fire extinguishing device of the present invention;

[0023] Figure 3 This is a schematic diagram of the valve structure of a temperature-sensing self-starting fire extinguishing device of the present invention;

[0024] Figure 4 A schematic diagram of the connection between a temperature-sensing self-starting fire extinguishing device of the present invention in a state of filling a fire extinguishing agent and a transfer filling structure;

[0025] Figure 5 This is a schematic diagram of the connection between the working state of a temperature-sensing self-starting fire extinguishing device of the present invention and the signal feedback structure. DETAILED DESCRIPTION

[0026] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0027] The present invention provides a temperature-sensitive, self-activating fire extinguishing device. Its primary goal is to pre-store fire extinguishing agent within a flexible fire extinguishing tube, based on the size of the electrical equipment space and the required fire extinguishing concentration. This tube is sealed at both ends and can be flexibly installed within the space according to the characteristics of the fire hazard. When a high temperature occurs locally within the electrical equipment, the fire detector tube, with its temperature-sensitive cracking properties, promptly releases the fire extinguishing agent to extinguish the fire, achieving self-activating, real-time fire extinguishing. It can also send a signal to the control backend, providing reliable data for the fire alarm, thereby achieving localized, coordinated shutoff.

[0028] See also Figure 1 A temperature-sensing self-starting fire extinguishing device of the present invention includes a flexible fire extinguishing pipe 1, an end sealing structure, a valve structure, a transfer filling structure and a signal feedback structure.

[0029] See also Figure 1 and Figure 2The flexible fire extinguishing pipe 1 is fitted with an end-sealing structure for sealing. This structure comprises an end cap 16, within which are located an inner liner 18, an O-ring 17, and a nut 15. Liner 18, installed within the flexible fire extinguishing pipe, provides strength. Tightening nut 15 compresses O-ring 17, enhancing friction and sealing between the end cap and the pipe, thus achieving the end-sealing function.

[0030] A lock nut 3 is embedded within the flexible fire extinguishing hose's header. A sealing ring 14 is installed between the lock nut 3 and the flexible fire extinguishing hose 1. A locking sleeve 2 is installed on the outside of the flexible fire extinguishing hose 1. The lock nut 3 and the locking sleeve 2 are threaded together. This threaded connection squeezes the sealing ring 14, increasing its deformation and sealing performance. It also increases the friction between the flexible fire extinguishing hose 1 and the sealing ring 14, preventing the flexible fire extinguishing hose 1 from disengaging when subjected to internal pressure.

[0031] See also Figure 3 The flexible fire extinguishing hose has a valve structure 13 installed at its head, comprising a valve body 131, a one-way valve pin 132, a pagoda spring 133, and a sealing gasket 134. The valve cavity 102 of the valve structure communicates with the inner cavity of the flexible fire extinguishing hose 101. This cavity 102 is sealed by a one-way valve pin 132, which is fitted with a pagoda spring 133. Under the force of the pagoda spring 133, the one-way valve pin 132 presses against the sealing gasket 134, thereby maintaining the sealing surface.

[0032] See also Figure 4 When filling the flexible fire extinguishing pipe with fire extinguishing agent, the valve structure is connected to the air inlet pipe 20 through the adapter filling structure. The adapter filling structure includes a quick connector 19. Rotating the quick connector 19 causes the adapter filling structure to press down on the one-way valve ejector pin to generate pressure, pushing open the one-way valve ejector pin 132, thereby connecting the inner cavity 101 of the flexible fire extinguishing pipe, the valve cavity 102 and the airway 103 of the adapter filling structure. The fire extinguishing agent is pressurized and injected into the flexible fire extinguishing pipe from the air inlet pipe. When the filling weight of the fire extinguishing agent reaches the requirement, the quick connector 19 is unscrewed, and the one-way valve ejector pin 132 is automatically closed under the action of the pagoda spring 133 to prevent the fire extinguishing agent from leaking.

[0033] See also Figure 5. After the flexible fire extinguishing pipe is filled with fire extinguishing agent, remove the transfer filling structure and connect the valve structure to the signal feedback structure 4. The signal feedback structure 4 includes a push rod 5, a push rod spring 8 and a contact switch 7. The inner cavity 104 of the signal feedback structure is connected to the valve cavity 102 and the inner cavity 101 of the flexible fire extinguishing pipe. The push rod 5 overcomes the force of the push rod spring 8 under the action of air pressure, pushes open the contact switch 7 and sends a normal signal to the outside. When the flexible fire extinguishing pipe 1 is cracked by high temperature, the pressure in the inner cavity 101 of the flexible fire extinguishing pipe disappears, and the push rod 5 is reset under the action of the push rod spring 8, disengaging the contact switch 7, and the contact switch signal disappears, causing the background system to sense the occurrence of the abnormal state, and then linking further processes such as power off and alarm. The signal feedback structure 4 is connected and fixed to the protective cap 6 by a pin 601. In this way, the rotation position of the pin 601 and the protective cap 6 relative to the signal feedback structure 4 can be adjusted arbitrarily. A limit block 602 is provided between the push rod 5 and the protective cap 6 to adjust the compression force of the push rod spring 8, thereby adjusting the pressure of the inner cavity 101 of the flexible fire extinguishing tube required for the push rod 5 to trigger the contact switch 7, avoiding false alarms caused by slight pressure changes due to thermal expansion and contraction.

[0034] The flexible fire extinguishing hose is made of high-temperature pyrolysis plastic, which is resistant to high pressure and aging. It pyrolyzes at a certain temperature, releasing the fire extinguishing agent contained within. When a fire breaks out outside and generates high temperatures, the pyrolysis automatically releases the fire extinguishing agent to extinguish the fire.

[0035] In order to ensure the sealing performance, the flexible fire extinguishing pipe 1 and the signal feedback structure 4 are further provided with a first sealing structure 9 , a second sealing structure 10 , a third sealing mechanism 11 and a fourth sealing structure 12 .

[0036] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A temperature-sensing self-starting fire extinguishing device, comprising a flexible fire extinguishing pipe, characterized in that: It also includes an end sealing structure, a valve structure, a transfer filling structure and a signal feedback structure; The tail of the flexible fire extinguishing pipe is equipped with an end sealing structure for sealing, and the head of the flexible fire extinguishing pipe is equipped with a valve structure. The valve cavity of the valve structure is connected to the inner cavity of the flexible fire extinguishing pipe. The valve cavity is closed by a one-way valve ejector pin, and a return spring is provided on the one-way valve ejector pin. When filling the flexible fire extinguishing pipe with fire extinguishing agent, the valve structure is connected to the air inlet pipe through the transfer filling structure. When the transfer filling structure is operated, the one-way valve pin is pushed open, thereby connecting the inner cavity of the flexible fire extinguishing pipe, the valve cavity and the air passage of the transfer filling structure. The fire extinguishing agent is pressurized and poured into the flexible fire extinguishing pipe from the air inlet pipe. When the fire extinguishing agent filling weight reaches the required weight, the transfer filling structure is operated, and the one-way valve pin is automatically closed under the action of the return spring to prevent the fire extinguishing agent from leaking out. After the flexible fire extinguishing pipe is filled with fire extinguishing agent, the transfer filling structure is removed, and the valve structure is connected to the signal feedback structure. The signal feedback structure includes a push rod, a push rod spring and a contact switch. The inner cavity of the signal feedback structure is connected with the valve cavity and the inner cavity of the flexible fire extinguishing pipe. The push rod overcomes the force of the push rod spring under the action of air pressure, opens the contact switch and sends a normal signal to the outside. When the flexible fire extinguishing pipe is cracked by high temperature, the inner cavity pressure of the flexible fire extinguishing pipe disappears, and the push rod is reset under the action of the push rod spring, disengaging the contact switch, and the contact switch signal disappears. A lock nut is embedded inside the inlet end of the flexible fire extinguishing pipe, a sealing ring is provided between the lock nut and the flexible fire extinguishing pipe, and a lock sleeve is provided outside the flexible fire extinguishing pipe. The lock nut and the lock sleeve are connected by threads, and the sealing ring is squeezed through the threaded connection. The valve structure includes a valve body, a one-way valve ejector pin, a return spring and a sealing gasket. The one-way valve ejector pin presses the sealing gasket under the force of the return spring to maintain the sealing surface.

2. A temperature-sensing self-starting fire extinguishing device according to claim 1, characterized in that: The return spring is a pagoda spring.

3. A temperature-sensing self-starting fire extinguishing device according to claim 1, characterized in that: The transfer filling structure includes a quick connector, and rotating the quick connector causes the transfer filling structure to press downward toward the ejector pin side of the one-way valve to generate pressure.

4. A temperature-sensing self-starting fire extinguishing device according to claim 1, characterized in that: The signal feedback structure and the protective cap are connected and fixed by pins.

5. A temperature-sensing self-starting fire extinguishing device according to claim 4, characterized in that: A limit block is provided between the ejector rod and the protective cap to adjust the compression force of the ejector rod spring.

6. A temperature-sensing self-starting fire extinguishing device according to claim 1, characterized in that: The end sealing structure includes an end plugging cap, which is provided with an inner liner, an O-ring and a nut. The inner liner is installed inside the flexible fire extinguishing pipe to support the strength of the flexible fire extinguishing pipe. By tightening the nut, the O-ring is squeezed to increase the friction and sealing between the O-ring and the flexible fire extinguishing pipe, thereby achieving the end sealing function.

7. A temperature-sensing self-starting fire extinguishing device according to claim 1, characterized in that: The flexible fire extinguishing hose is made of plastic.

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