Electrified fusible alloy self-starting valve

Abstract

The invention belongs to the technical field of valves, and particularly provides an electrified fusible alloy self-starting valve. The problems that an existing fusible alloy valve is single in driving mode and cannot respond in time are solved. One side of the valve body is provided with a connector, and the other side of the valve body is in threaded connection with a shell; the fusible plug is installed in the shell, the fusible plug is composed of a cylindrical part and a circular truncated cone part, the shell is provided with a through hole, and the valve body is provided with a stroke cavity communicated with the through hole; the electric control element is installed on the side wall of the valve body, and the electric control element is used for heating the shell. The valve is opened through high-temperature melting of the fusible plug to conduct automatic fire extinguishing operation, meanwhile, the fusible plug can be controlled to be rapidly melted through the electric control element, it is ensured that a fire extinguishing medium is rapidly sprayed out of the stroke cavity to cover a fire source, the purpose of rapid fire extinguishing is achieved, and therefore economic losses are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and mainly aims at an electrically charged fusible alloy self-activating valve. Background Art

[0002] In the fire safety systems of modern buildings and industrial facilities, fusible alloy self-activating valves, as crucial components, undertake the key task of automatically opening to release fire extinguishing agents in case of a fire. These valves are designed with temperature-sensitive materials (such as fusible alloys). When exposed to abnormal high temperatures, the fusible alloy melts, causing the valve to automatically open and spray fire extinguishing media (water, dry powder fire extinguishing agents, clean gas fire extinguishing agents, etc.), thereby suppressing the spread of fire and protecting the safety of personnel.

[0003] However, in practical applications, if the temperature rises relatively slowly in the initial stage of a fire, the fusible alloy may not reach the preset melting point in time, resulting in a delayed start of the valve. This situation will lead to a lag in the release of fire extinguishing agents, allowing the fire to spread and causing more goods to be damaged. In addition, in the initial stage of a fire, even if the monitoring personnel discover the fire situation through the monitoring system and mobilize personnel for fire extinguishing operations, there is still a waiting period. During this period, the fire will continue to spread, causing greater economic losses. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an electrically charged fusible alloy self-activating valve.

[0005] The technical solution is: an electrically charged fusible alloy self-activating valve, comprising: A valve body, with a joint installed on one side and a housing threadedly connected to the other side; A fusible plug, installed inside the housing. The fusible plug is composed of a cylindrical part and a frustum part. The housing is provided with a through hole, and the valve body is provided with a stroke cavity communicating with the through hole; An electronic control element, installed on the side wall of the valve body, and the electronic control element is used to heat the housing.

[0006] Preferably, it further includes: An elastic telescopic rod, fixedly connected inside the stroke cavity of the valve body; A fixed plug, fixedly connected to the telescopic end of the elastic telescopic rod, and the fixed plug is used to block the stroke cavity.

[0007] Preferably, a conductor is fixedly connected inside the fusible plug, and the conductor penetrates through the housing and is fixedly connected to it.

[0008] Preferably, a heat conducting member is fixedly connected to the housing, and the heat conducting member is in contact with the conductor.

[0009] Preferably, it further includes: The sliding frame is slidably arranged in the shell, and the sliding frame divides the shell into a first chamber and a second chamber. A first elastic member is fixedly connected between the sliding frame and the shell, and the first elastic member is located in the first chamber. The sliding frame is provided with a diversion hole communicating with the second chamber, and the sliding frame is used to block the through hole.

[0010] Preferably, a sliding ring is hermetically and slidably arranged in the second chamber of the shell. A second elastic member is installed between the sliding ring and the shell, and the elastic coefficient of the second elastic member is smaller than that of the first elastic member.

[0011] Preferably, it further includes: A fixed shell is fixedly connected to the valve body, and the fixed shell is located in the joint. The fixed shell is provided with a round hole; A sliding shell is limit-slidingly arranged in the fixed shell. The sliding shell is provided with a round hole, and the round hole on the sliding shell intersects with the round hole on the fixed shell. A third elastic member is installed between the sliding shell and the fixed shell, and the outer diameter of the sliding shell is the same as the outer diameter of the cylindrical part of the fusible plug.

[0012] Preferably, a safety relief piece in contact with the fusible plug is fixedly connected to the sliding shell, and the conductor penetrates through the safety relief piece and is slidably connected thereto.

[0013] Preferably, the joint is rotatably connected to the valve body, and circumferentially distributed spiral blades are fixedly connected to the outer side surface of the fixed shell.

[0014] Preferably, the spiral direction of the spiral blade is opposite to the spiral direction of the spiral connection between the valve body and the shell.

[0015] The beneficial effects of the present invention are as follows: The present invention opens the valve for automatic fire extinguishing operation by melting the fusible plug at high temperature. At the same time, the present invention can also control the rapid melting of the fusible plug through an electric control element to ensure that the fire extinguishing medium quickly sprays out from the stroke chamber and covers the fire source, achieving the purpose of rapid fire extinguishing, thereby reducing economic losses; through the threaded connection between the shell and the valve body, it is convenient for the operator to replace the fusible plug and reuse the device, avoiding waste of resources; by moving the fixed plug, the gap between the fixed plug and the stroke chamber is changed to ensure that the coverage range of the fire extinguishing medium sprayed out from the stroke chamber remains relatively constant; by using the sequential sliding of the sliding ring and the sliding frame, the melted fusible plug is separately collected to reduce the melted fusible plug from spraying out together with the fire extinguishing medium; by using the intersection of the round hole on the fixed shell and the round hole on the sliding shell, the valve forms a double-sealing structure, further improving the sealing effect of the valve in the closed state, avoiding leakage of the fire extinguishing medium, and thus ensuring the reliability and stability of the entire fire protection system. Description of the Drawings

[0016] Figure 1 Schematic three-dimensional structure diagram of the present invention; Figure 2 Schematic three-dimensional structure diagram of the housing and the fixed housing of the present invention; Figure 3 Cross-sectional view of the valve body and the housing of the present invention; Figure 4 Cross-sectional view of the fixed housing and the sliding housing of the present invention; Figure 5 Cross-sectional view of the elastic telescopic rod and the fixed plug of the present invention; Figure 6 Cross-sectional view of the sliding frame and the sliding ring of the present invention.

[0017] In the figure: 1. Valve body, 2. Connector, 3. Housing, 4. Fusible plug, 5. Through hole, 6. Stroke cavity, 7. Electric control element, 8. Elastic telescopic rod, 9. Fixed plug, 10. Conductor, 11. Heat conducting member, 12. Sliding frame, 121. First chamber, 122. Second chamber, 13. First elastic member, 14. Sliding ring, 15. Second elastic member, 16. Fixed housing, 17. Sliding housing, 18. Third elastic member, 19. Safety relief piece, 20. Spiral blade. Detailed implementation manners

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention. The present invention is usually installed above the easily ignitable source, that is, it is usually used in an inverted state as follows. Figure 1 used in an inverted state.

[0019] Embodiment 1: A live fusible alloy self-starting valve, referring to Figures 1-3 as shown, including: a valve body 1, with a connector 2 installed on one side thereof and a housing 3 threadedly connected to the other side thereof; a fusible plug 4, installed in the housing 3, the fusible plug 4 is composed of a cylindrical portion and a frustum portion, the housing 3 is provided with a through hole 5, and the valve body 1 is provided with a stroke cavity 6 communicating with the through hole 5; an electric control element 7, installed on the side wall of the valve body 1, and the electric control element 7 is used to heat the housing 3.

[0020] In the above solution, the fusible plug 4 is made of Wood's alloy (which melts above 72°C). The cylindrical part of the fusible plug 4 is located below its frustum part, and the cross-section of the frustum part of the fusible plug 4 gradually becomes smaller from bottom to top. The fusible plug 4 can be made of different fusible alloys according to different requirements. Information such as the melting point of the fusible plug 4 can be engraved on the side wall of the valve body 1 to facilitate the operator to find the valve of the corresponding specification. There are four through holes 5 distributed circumferentially. The stroke cavity 6 is divided into an annular cavity, a rectangular cavity and a frustum cavity. All four through holes 5 are communicated with the annular cavity of the stroke cavity 6. An annular protrusion is provided on the lower side of the housing 3, and an annular groove matching the annular protrusion on the housing 3 is provided on the upper side of the valve body 1 to improve the sealing performance between the valve body 1 and the housing 3. The electric control element 7 is composed of a wire and a heating wire. When the electric control element 7 works, the heating wire in it generates heat. It is often used in cooperation with a fire protection system. The fire protection system is composed of a high-pressure gas cylinder, a pipeline and a fire extinguishing medium storage tank. The working mode of the fire protection system is that the gas in the high-pressure gas cylinder flows out to the outside. During the flowing process, the gas adsorbs the fire extinguishing medium in the fire extinguishing medium storage tank, so that the flowing gas carries the fire extinguishing medium and sprays it onto the fire source outside together to extinguish the fire (this is a simple summary of the fire protection system).

[0021] Specific working principle: First, thread the joint 2 in this valve onto the pipeline in the fire protection system, and make the electric control element 7 in the installed valve electrically connected to the remote control terminal through the Internet of Things. When a fire breaks out in the area monitored by the fire protection system, the supervisor in front of the monitoring panel observes the fire and sends a signal through the remote control terminal to control the electric control element 7 to work. When the electric control element 7 works, the temperature of the housing 3 rises, and the temperature of the housing 3 quickly reaches the melting point of the fusible plug 4. Subsequently, the fusible plug 4 melts. At this time, the gas in the high-pressure gas cylinder in the fire protection system passes through the joint 2, the housing 3, the through holes 5 and the stroke cavity 6 and sprays out. During the flowing process, the gas will carry the fire extinguishing medium in the fire protection system and spray it out together. The fire extinguishing medium sprayed out through the stroke cavity 6 sprays onto the fire source at a high speed and in a large area coverage form, quickly cools the burning substance and isolates oxygen, so as to achieve the purpose of quickly extinguishing the fire, greatly shortening the time difference between the occurrence of the fire and the start of extinguishing the fire, and helping to extinguish the fire before the fire spreads.

[0022] If a fire breaks out without supervision, the heat of the fire is transferred to the housing 3. When the temperature on the housing 3 reaches the melting point of the fusible plug 4, the above operations are repeated to ensure that this device automatically performs the fire extinguishing operation. Through the dual applications of the above electric drive work and automatic start work, this valve can flexibly respond to fires in different situations, significantly improving the reliability and adaptability of the fire protection system, and helping to minimize property losses.

[0023] After the fire extinguishing is completed, the operator separates the housing 3 from the valve body 1 by rotating the housing 3. Subsequently, a new fusible plug 4 is placed into the housing 3, and then the housing 3 is reinstalled on the valve body 1 by threading. The above operations improve the reuse rate of the device and avoid waste of resources.

[0024] Example 2: On the basis of Example 1, referring to Figure 2 , Figure 4 and Figure 5 as shown, it further includes: an elastic telescopic rod 8, fixedly connected inside the stroke cavity 6 of the valve body 1; a fixed plug 9, fixedly connected to the telescopic end of the elastic telescopic rod 8, and the fixed plug 9 is used to block the stroke cavity 6; a conductor 10 is fixedly connected inside the fusible plug 4, and the conductor 10 penetrates through the housing 3 and is fixedly connected thereto; a heat conducting member 11 is fixedly connected to the housing 3, and the heat conducting member 11 is in contact with the conductor 10.

[0025] In the above solution: The elastic telescopic rod 8 is composed of a cylindrical shell, a sliding push rod and a spring. In the initial state, the spring inside the elastic telescopic rod 8 is in a compressed state, the fixed plug 9 blocks the stroke cavity 6, and the conductor 10 is used to guide the heat to be evenly transferred to the fusible plug 4, so that the fusible plug 4 melts from the middle to the outside. The heat conducting member 11 has a larger contact area with the outside world, which is convenient for the valve body to be more accurate and fast when sensing the outside temperature to open.

[0026] Specific working principle: During the fire extinguishing operation, the gas in the high-pressure gas cylinder first squeezes the fixed plug 9 when flowing. The fixed plug 9 moves forward under the extrusion and makes the elastic telescopic rod 8 extend. The elastic telescopic rod 8 extends and compresses the spring inside it. Subsequently, the flowing gas sprays out through the annular gap between the fixed plug 9 and the stroke cavity 6. The gas in the high-pressure gas cylinder will carry the fire extinguishing medium and spray it out together during the flowing process. The sprayed fire extinguishing medium quickly covers the fire area for fire extinguishing operation.

[0027] During the fire extinguishing operation, as the gas in the high-pressure gas cylinder is gradually discharged, the air pressure in the high-pressure gas cylinder gradually becomes smaller, so that the amount of gas ejected per unit time becomes smaller (the pressure of the high-pressure gas cylinder in the fire protection system will not change significantly in a short time, and the change in the gas ejection amount within a certain range will not affect the fire extinguishing effect). And the decrease in gas pressure makes the extrusion force of the ejected fire extinguishing medium on the fixed plug 9 smaller. Under the action of the elastic force of the spring inside the elastic telescopic rod 8, the fixed plug 9 moves slightly backward to make the annular gap between it and the stroke cavity 6 smaller, so that when the amount of gas ejected by this valve becomes smaller, the gap of the nozzle is reduced, and the flow rate of the ejected gas is increased, ensuring that the sprayed fire extinguishing medium still covers the area in the initial state, thereby ensuring that the fire extinguishing effect of this device remains relatively stable.

[0028] Example 3: On the basis of Example 2, referring to Figure 3 , Figure 4 and Figure 6As shown in the figure, it further includes: a sliding frame 12, which is slidably arranged in the housing 3, and the sliding frame 12 divides the housing 3 into a first chamber 121 and a second chamber 122. A first elastic member 13 is fixedly connected between the sliding frame 12 and the housing 3, and the first elastic member 13 is located in the first chamber 121. The sliding frame 12 is provided with a diversion hole communicating with the second chamber 122, and the sliding frame 12 is used to block the through hole 5; A sliding ring 14 is hermetically and slidably arranged in the second chamber 122 of the housing 3. A second elastic member 15 is installed between the sliding ring 14 and the housing 3, and the elastic coefficient of the second elastic member 15 is less than that of the first elastic member 13.

[0029] In the above solution, the volume of the second chamber 122 is larger than the volume of the fusible plug 4 after melting (only a structural schematic is shown in the figure, and its actual volume can be changed accordingly according to requirements). Both the first elastic member 13 and the second elastic member 15 are springs, and the first elastic member 13 is always in a compressed state, and the sliding frame 12 blocks the through hole 5.

[0030] Specific working principle: During the fire extinguishing operation, as the fusible plug 4 melts, the gas in the high-pressure gas cylinder flows and drives the melted fusible plug 4 to flow into the second chamber 122 through the diversion hole on the sliding frame 12. The melted fusible plug 4 first contacts the sliding ring 14. As the melted fusible plug 4 continues to be injected, the melted fusible plug 4 squeezes the sliding ring 14, causing it to move downward and compress the second elastic member 15. After the second elastic member 15 is compressed to the limit position, at this time, the melted fusible plug 4 enters the second chamber 122. Subsequently, the gas in the high-pressure gas cylinder continues to flow and squeezes the sliding frame 12 to move upward. The upward movement of the sliding frame 12 compresses the first elastic member 13, and the upward movement of the sliding frame 12 will gradually release the blockage of the through hole 5. Subsequently, the high-pressure gas and the fire extinguishing medium are sprayed to the outside through the through hole 5 and the stroke chamber 6 for fire extinguishing operation.

[0031] During the above fire extinguishing process, the melted fusible plug 4 is separately collected, reducing the spraying of the melted fusible plug 4 to the outside and improving the use safety of the device. Subsequently, during the replacement of the device, only the housing 3 needs to be replaced together.

[0032] Embodiment 4: On the basis of Embodiment 3, referring to Figures 1-3 As shown in the figure, it further includes: a fixed shell 16, which is fixedly connected to the valve body 1 and is located in the joint 2. The fixed shell 16 is provided with a round hole; A sliding shell 17 is limit-slidingly arranged in the fixed shell 16. The sliding shell 17 is provided with a round hole, and the round hole on the sliding shell 17 intersects with the round hole on the fixed shell 16. A third elastic member 18 is installed between the sliding shell 17 and the fixed shell 16. The outer diameter of the sliding shell 17 is the same as the outer diameter of the cylindrical part of the fusible plug 4; The sliding shell 17 is fixedly connected with a safety relief piece 19 that contacts the fusible plug 4, and the conductor 10 penetrates through the safety relief piece 19 and is slidably connected to it.

[0033] In the above solution, the safety relief piece 19 is adhered to the upper side of the sliding shell 17. A rubber sealing ring is arranged on the outer side of the sliding shell 17 to improve the sealing performance between the sliding shell 17 and the fixed shell 16. At the same time, under the limiting action of the safety relief piece 19, the fusible plug 4 is prevented from loosening between the shell 3. The lower part of the fixed shell 16 is conical. The safety relief piece 19 will break under high pressure. The third elastic member 18 is a spring. In the initial state, the third elastic member 18 is in a compressed state. In the normal working state, the fusible plug 4 is in a solid state. Under the elastic force of the third elastic member 18, the sliding shell 17 and the safety relief piece 19 are in close contact with the fusible plug 4. And at this time, the circular holes on the sliding shell 17 and the circular holes on the fixed shell 16 are staggered, so that the valve body forms a double-sealing structure, improving the sealing effect of the valve body and preventing the fire extinguishing medium from leaking, thereby ensuring the reliability and stability of the entire fire protection system.

[0034] When the shell 3 is in a high-temperature state and the fusible plug 4 melts, under the elastic force of the third elastic member 18, the sliding shell 17 and the safety relief piece 19 move upward to push the melted fusible plug 4 upward. When the sliding shell 17 and the safety relief piece 19 move upward to the limit position, the circular holes on the sliding shell 17 are completely communicated with the circular holes on the fixed shell 16. At this time, the gas in the high-pressure gas cylinder in the fire protection system acts on the safety relief piece 19 through the circular holes on the sliding shell 17 and the circular holes on the fixed shell 16, causing the safety relief piece 19 to break. Subsequently, the melted fusible plug 4 is gradually driven into the second chamber 122. Subsequently, the flow of the gas in the above-mentioned embodiment 3 is repeated until the fire extinguishing medium follows the flowing gas and is discharged from the stroke chamber 6 to complete the fire extinguishing operation.

[0035] Embodiment 5: On the basis of Embodiment 4, referring to Figure 2 and Figure 4 As shown, the joint 2 is rotatably connected to the valve body 1. A circumferentially distributed spiral blade 20 is fixedly connected to the outer side of the fixed shell 16; the spiral direction of the spiral blade 20 is opposite to the spiral direction of the spiral connection between the valve body 1 and the shell 3.

[0036] In the above solution, there are three spiral blades 20. During the upward flow of the fire extinguishing medium, the fire extinguishing medium impacts the spiral blades 20, causing the spiral blades 20 to drive the valve body 1 to rotate through the fixed shell 16. The rotation of the valve body 1 changes the orientation of the stroke chamber 6, thereby further increasing the coverage area of the fire extinguishing medium ejected by the valve. At the same time, since the spiral direction of the spiral blade 20 is opposite to the spiral direction of the spiral connection between the valve body 1 and the shell 3, during the rotation of the valve body 1, the connection between the valve body 1 and the shell 3 is tightened, improving the working stability of the valve. This structure can be designed selectively. In areas where goods are not dense and the environment is open, if a fire extinguishing system is installed, a valve body with this structure can be selected.

[0037] The technical principles of the embodiments of the present invention have been described above in connection with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be construed in any way as limiting the scope of protection of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the embodiments of the present invention without creative efforts, and these embodiments will fall within the scope of protection of the embodiments of the present invention.

Claims

1. Electrically fusible alloy self-actuating valve, characterized in that, It includes: A valve body (1) with a joint (2) installed on one side and a housing (3) threadedly connected to the other side; A fusible plug (4) installed inside the housing (3). The fusible plug (4) consists of a cylindrical part and a frustum part. The housing (3) is provided with a through hole (5), and the valve body (1) is provided with a stroke cavity (6) communicating with the through hole (5); An electric control element (7) installed on the side wall of the valve body (1). The electric control element (7) is used to heat the housing (3).

2. The self-actuating valve with electrically charged fusible alloy according to claim 1, characterized in that, It also includes: An elastic telescopic rod (8) fixedly connected inside the stroke cavity (6) of the valve body (1); A fixed plug (9) fixedly connected to the telescopic end of the elastic telescopic rod (8), and the fixed plug (9) is used to block the stroke cavity (6).

3. The electrically charged fusible alloy self-activating valve according to claim 1, characterized in that, A conductor (10) is fixedly connected inside the fusible plug (4), and the conductor (10) penetrates through the housing (3) and is fixedly connected to it.

4. The electrically fusible alloy self-actuating valve according to claim 3, wherein A heat conducting member (11) is fixedly connected to the housing (3), and the heat conducting member (11) contacts the conductor (10).

5. The electrothermal fusible alloy self-actuating valve according to claim 3, characterized in that, It also includes: A sliding frame (12) slidably arranged inside the housing (3). The sliding frame (12) divides the housing (3) into a first chamber (121) and a second chamber (122). A first elastic member (13) is fixedly connected between the sliding frame (12) and the housing (3), and the first elastic member (13) is located inside the first chamber (121). The sliding frame (12) is provided with a diversion hole communicating with the second chamber (122), and the sliding frame (12) is used to block the through hole (5).

6. The electrothermal fusible alloy self-actuating valve according to claim 5, wherein A sliding ring (14) is hermetically and slidably arranged inside the second chamber (122) of the housing (3). A second elastic member (15) is installed between the sliding ring (14) and the housing (3), and the elastic coefficient of the second elastic member (15) is smaller than that of the first elastic member (13).

7. The self-starting valve with electrically charged fusible alloy according to claim 6, characterized in that, It also includes: A fixed shell (16) fixedly connected to the valve body (1), and the fixed shell (16) is located inside the joint (2). The fixed shell (16) is provided with a circular hole; A sliding shell (17) is limitably slidably arranged inside the fixed shell (16). The sliding shell (17) is provided with a circular hole, and the circular hole on the sliding shell (17) is staggered with the circular hole on the fixed shell (16). A third elastic member (18) is installed between the sliding shell (17) and the fixed shell (16), and the outer diameter of the sliding shell (17) is the same as the outer diameter of the cylindrical part of the fusible plug (4).

8. The self-starting valve with electrofusing alloy according to claim 7, characterized in that, The sliding shell (17) is fixedly connected with a safety relief piece (19) contacting the fusible plug (4), and the conductor (10) penetrates through the safety relief piece (19) and is slidably connected to it.

9. The self-starting valve with electrically charged fusible alloy according to claim 7, characterized in that, The joint (2) is rotatably connected to the valve body (1), and the outer side surface of the fixed shell (16) is fixedly connected with circumferentially distributed helical blades (20).

10. The self-starting valve with electrically charged fusible alloy according to claim 9, characterized in that, The helical direction of the helical blades (20) is opposite to the helical direction of the threaded connection between the valve body (1) and the housing (3).

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