Fire extinguishing agent bottle valve of temperature-sensing self-starting fire extinguishing device
By designing a multi-chamber structure in the fire extinguishing agent bottle head valve and controlling the air pressure relationship, the problem of seal ring corrosion in a high-pressure carbon dioxide environment is solved, the reliability and stability of the fire extinguishing device are improved, and the automatic fire extinguishing function is realized.
Patent Information
- Application Number
- CN202421473403.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device causes corrosion of the sealing ring, stagnation of the valve core or gas leakage, and poor use reliability.
A fire extinguishing agent bottle head valve is designed, and its valve core element includes a sealing end and a stress-bearing end. By setting the first chamber, the second chamber and the third chamber, and controlling the air pressure relationship, the air pressure of the first chamber and the third chamber are smaller than the air pressure of the second chamber, avoiding carbon dioxide liquefaction and improving the corrosion resistance of the sealing ring.
It effectively avoids the sealing ring being corroded by liquefied carbon dioxide, improves the reliability and stability of the fire extinguishing device, and realizes the function of automatically sensing the fire and extinguishing the fire.
Smart Images
Figure CN222760362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a fire extinguishing agent bottle head valve of a temperature-sensitive self-starting fire extinguishing device. Background Art
[0002] At present, the installation of fire-detecting tube temperature-sensing self-starting fire extinguishing devices in equipment and facilities such as power distribution rooms, electrical cabinets, and mobile communication base stations has attracted much attention. However, some existing fire extinguishing agent bottle head valves of temperature-sensing self-starting fire extinguishing devices include a valve body and a valve core. The valve core divides the inner cavity of the valve body into two connected first and second chambers. When in use, the first chamber is connected to the fire extinguishing agent bottle, and the second chamber is connected to the fire-detecting tube. The air pressure in these two chambers is the same, and is the same as the high air pressure in the carbon dioxide fire extinguishing agent bottle. Carbon dioxide under high pressure is easy to liquefy into liquid. Liquid carbon dioxide has high corrosiveness (compared to gaseous carbon dioxide), which causes the sealing rings in these two chambers to soften and expand after contacting liquid carbon dioxide, resulting in the valve core being stuck and unable to open, or gas leaking from the outlet, and poor reliability in use. Utility Model Content
[0003] In order to solve at least one aspect of the above problems, the utility model provides a fire extinguishing agent bottle head valve of a temperature-sensitive self-starting fire extinguishing device, comprising: a valve body and a valve core element movably built into the valve body, the valve body is provided with an air inlet, an air outlet and a first channel connected between the air inlet and the air outlet, the air inlet is connected to the bottle mouth of the fire extinguishing agent bottle, the valve core element comprises a blocking end for blocking the first channel, a force-bearing end is formed at one end of the valve core element away from the blocking end, a first chamber is formed between the air outlet and the valve core element, a first pressure is in the first chamber, and a pressure is formed between the blocking end and the air inlet. a second chamber, a second pressure is applied in the second chamber, a third chamber is formed between the force-bearing end and the valve body, a third pressure is applied in the third chamber, and the second chamber and the third chamber are not connected in a normal state; the valve core element is slidably placed in the valve body, and in the sliding direction of the valve core element: the area of the blocking end affected by the air pressure of the first chamber is the first area, the area of the blocking end affected by the air pressure of the second chamber is the second area, and the area of the force-bearing end affected by the air pressure of the third chamber is the third area, the first pressure and the third chamber are both less than the second pressure, and the sum of the first area and the second area is less than the third area;
[0004] In the sliding direction of the valve core element: the force direction of the blocking end is the first direction driving the valve core element to slide and open the first channel, and the force magnitude of the blocking end is the first pressure: the first pressure = the first pressure × the first area + the second pressure × the second area; the force direction of the force-bearing end is the second direction driving the valve core element to block the first channel, the second direction is opposite to the first direction, and the force magnitude of the force-bearing end is the second pressure, the second pressure = the third pressure × the third area, and the second pressure is greater than the first pressure; in the fire extinguishing agent bottle head valve of the temperature-sensing self-starting fire extinguishing device of the utility model, the air pressures of the first chamber and the third chamber are both lower than the air pressure of the second chamber under normal conditions, so that the carbon dioxide in the first chamber and the third chamber is not easy to liquefy, thereby avoiding the corrosion of parts such as the sealing ring by the liquefied carbon dioxide, and improving the reliability and stability during use.
[0005] Optionally, the first chamber and the third chamber are both connected to an external fire detection pipeline. Under normal circumstances, the air pressure in the first chamber, the third chamber and the fire detection pipeline is the same; when the fire detection pipeline is ruptured due to fire, the air pressure in the third chamber is reduced, so that the valve core element drives the blocking end to slide and open the first channel.
[0006] Optionally, a fire detection pipeline opening and closing valve is provided on the valve body, and the fire detection pipeline opening and closing valve is used to connect / block the third chamber and the fire detection pipeline.
[0007] Optionally, a first sealing ring is provided on the blocking end, an annular groove is provided on the valve body, and an annular protrusion for sealing against the first sealing ring is formed inside the annular groove.
[0008] Optionally, the valve core element is provided with an air replenishing and pressure maintaining mechanism for replenishing air and maintaining pressure in the third chamber. When air leakage and pressure reduction occur in the third chamber, part of the gas in the second chamber is replenished into the third chamber through the air replenishing and pressure maintaining mechanism to restore the third chamber to normal state.
[0009] Optionally, the fire extinguishing agent bottle is filled with high-pressure carbon dioxide, and the air replenishing and pressure maintaining mechanism includes a second channel and a pressure reducing valve core slidably arranged in the second channel, the second channel is arranged to pass through along the sliding direction of the valve core element, and the pressure reducing valve core slides along the through direction of the second channel. A sealing head for sealing the second channel is provided on the pressure reducing valve core, and a conducting cavity for connecting the third chamber and the second channel is provided on the pressure reducing valve core.
[0010] Optionally, a one-way reverse blocking ball is provided in the conduction cavity.
[0011] Optionally, the second channel includes a first connecting chamber and a second connecting chamber, the pressure reducing valve core includes a valve core seat and a valve core guide column, the first pressure area of the valve core seat is larger than the second pressure area of the valve core guide column, the valve core guide column is slidably placed in the first connecting chamber, the first connecting chamber is connected to the conducting chamber, and the plugging head is used to seal against the upper port of the second connecting chamber.
[0012] Optionally, an elastic member is provided between the pressure reducing valve core and the valve core element, a limit retaining ring for limiting the pressure reducing valve core is provided on the valve core element, and the limit retaining ring is placed on a side of the pressure reducing valve core away from the elastic member.
[0013] Optionally, the second channel further includes a third connecting cavity, in which a bidirectional sealing flow-limiting ball is arranged.
[0014] Compared with the prior art, the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model has a first chamber and a third chamber whose air pressure is lower than that of the second chamber under normal conditions, so that the carbon dioxide in the first chamber and the third chamber is not easy to liquefy, and the sealing ring and other parts are prevented from being corroded by the liquefied carbon dioxide, thereby improving the reliability and stability during use; the fire detection pipeline ruptures at high temperature, so that the carbon dioxide gas in the fire extinguishing agent bottle is discharged from the air outlet to the fire detection pipeline, and finally discharged from the ruptured part of the fire detection pipeline, so as to extinguish the fire source more accurately, realize the function of automatically sensing the fire and extinguishing the fire, and extinguish the fire quickly and intelligently; the air pressure in the first chamber is also reduced by the annular groove It can act on the blocking end upward, and the area of the first sealing ring affected by the air pressure of the first chamber is larger than the area affected by the air pressure of the second chamber, so that the part of the first sealing ring affected by the air pressure of the first chamber is not easily corroded by carbon dioxide and softened, expanded, and other problems; part of the gas in the second chamber is replenished into the third chamber through the air replenishment and pressure maintaining mechanism to restore the third chamber to the normal preset air pressure; avoid the valve core element from sliding up and opening due to excessive low air pressure in the third chamber, and it is reliable to use; when nitrogen is filled into the third chamber before the fire extinguishing agent bottle is inflated, if the one-way reverse blocking ball fails, the two-way sealing flow limiting ball slides down to seal, which can also temporarily play a sealing effect, and it is reliable to use and has a reasonable structural design. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a cross-sectional view of the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model when it is in normal standby mode;
[0016] Figure 2 for Figure 1 Enlarged view of the middle D part;
[0017] Figure 3 It is a cross-sectional view of the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model when it is completed;
[0018] Figure 4for Figure 3 Enlarged view of the middle F part;
[0019] Figure 5 It is a cross-sectional view of the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model when it is opened;
[0020] Figure 6 for Figure 5 Enlarged view of the middle G section;
[0021] Figure 7 This is a structural schematic diagram of the opening and closing valve part of the fire detection pipeline of the utility model;
[0022] Figure 8 It is a schematic diagram of the structure of the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model when it is stored;
[0023] Fig. 9 This is a schematic diagram of the structure of the fire detection pipeline part of the utility model;
[0024] The names of the components corresponding to the reference numerals in the figure are: 1 is a valve body, 100 is a fire extinguishing agent bottle, 101 is an annular groove, 102 is an annular protrusion, 103 is a second sealing ring, 104 is a third sealing ring, 105 is a fourth sealing ring, 106 is a powder metallurgy filter, 107 is a high-pressure one-way inflation valve, 108 is a fifth sealing ring, 11 is an air inlet, 12 is an air outlet, 13 is a first channel, 2 is a valve core element, 21 is a blocking end, 211 is a first sealing ring, 22 is a force-bearing end, 3 is a fire detection pipeline, 4 is a fire detection pipeline opening and closing valve, 41 is an opening and closing valve body, 42 is a needle valve core, 5 is a second channel, 51 is the first connecting chamber, 52 is the second connecting chamber, 53 is the third connecting chamber, 6 is the pressure reducing valve core, 61 is the sealing head, 62 is the conducting chamber, 621 is the one-way anti-reverse blocking ball, 63 is the valve core seat, 64 is the valve core guide column, 7 is the elastic part, 8 is the limit retaining ring, 9 is the two-way sealing flow limiting ball, A is the first chamber, B is the second chamber, C is the third chamber, SA is the first area, SB is the second area, SC is the third area, PA is the first pressure, PB is the second pressure, PC is the third pressure, F1 is the first pressure, F2 is the second pressure, F3 is the third pressure, S1 is the first pressure area, and S2 is the second pressure area. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0026] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.
[0027] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0028] See also Figure 1-Figure 9 The embodiment of the utility model provides a fire extinguishing agent bottle head valve of a temperature-sensitive self-starting fire extinguishing device, comprising: a valve body 1 and a valve core element 2 movably built into the valve body 1, the valve body 1 is provided with an air inlet 11, an air outlet 12 and a first channel 13 connected between the air inlet 11 and the air outlet 12, the opening directions of the air inlet 11 and the air outlet 12 are perpendicular, the air inlet 11 is connected with the bottle mouth of the fire extinguishing agent bottle 100, the air outlet 12 is used to discharge the fire extinguishing gas for fire extinguishing, the valve core element 2 comprises a blocking end 21 for blocking the first channel 13, the end of the valve core element 2 away from the blocking end 21 is formed with a force end 22, a first chamber A is formed between the air outlet 12 and the valve core element 2, and the first chamber A is a first pressure PA A second chamber B is formed between the blocking end 21 and the air inlet 11, and the second chamber B has a second pressure PB. A third chamber C is formed between the force-bearing end 22 and the valve body 1, and the third chamber C has a third pressure PC. Under normal conditions, the second chamber B and the third chamber C are not connected. The valve core element 2 is slid in the vertical direction and placed in the valve body 1. In the sliding direction of the valve core element 2, the area of the blocking end 21 subjected to the air pressure of the first chamber A is the first area SA, the area of the blocking end 21 subjected to the air pressure of the second chamber B is the second area SB, and the area of the force-bearing end 22 subjected to the air pressure of the third chamber C is the third area SC. The first pressure PA and the third chamber C are both less than the second pressure PB, and the sum of the first area SA and the second area SB is less than the third area SC.
[0029] In the sliding direction of the valve core element 2: the force direction of the blocking end 21 is the first direction that drives the valve core element 2 to slide and open the first channel 13, the first direction is vertically upward, and according to the pressure formula P=F / S, F=P×S is obtained, and the force magnitude of the blocking end 21 is the first pressure F1: the first pressure F1=first pressure PA×first area SA+second pressure PB×second area SB; the force direction of the force-bearing end 22 is the second direction that drives the valve core element 2 to block the first channel 13, the second direction is vertically downward, and the second direction is opposite to the first direction, and the force magnitude of the force-bearing end 22 is the second pressure F2, and the second pressure F2=third pressure PC×third area SC. By comparing the above The design of each area and each pressure parameter makes the second pressure F2 greater than the first pressure F1, so as to ensure that the valve core element 2 is in a state of sliding down in place under normal conditions, thereby ensuring the reliability of the plugging; by using a large area and a small pressure to press down the valve core element, the larger the third area SC is set, the smaller the third pressure PC can be set accordingly, so as to achieve the purpose of making carbon dioxide less likely to liquefy; in the fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device of the utility model, the air pressures in the first chamber and the third chamber are both lower than the air pressure in the second chamber under normal conditions, so that the carbon dioxide in the first chamber and the third chamber is not likely to liquefy, thereby avoiding corrosion of parts such as sealing rings by liquefied carbon dioxide, thereby improving reliability and stability during use.
[0030] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8The first chamber A and the third chamber C are both connected to the external fire detection pipeline 3. Under normal circumstances, the air pressures in the first chamber A, the third chamber C and the fire detection pipeline 3 are the same; when the fire detection pipeline 3 is ruptured by fire, the air pressure in the third chamber C is reduced, so that the valve core element 2 drives the blocking end 21 to slide and open the first channel 13; the fire detection pipeline 3 will rupture when the temperature exceeds 160°C. After the rupture, the carbon dioxide gas in the fire extinguishing agent bottle 100 is discharged from the gas outlet 12 to the fire detection pipeline, and finally discharged from the ruptured part of the fire detection pipeline, which is relatively close to the fire source at that place. Accurately extinguish fire, realize the function of automatically sensing fire and extinguishing fire, and extinguish fire quickly and intelligently; the valve body 1 is provided with a fire detection pipeline opening and closing valve 4, and the fire detection pipeline opening and closing valve 4 is used to conduct / block the third chamber C and the fire detection pipeline 3. The fire detection pipeline opening and closing valve 4 is a fire detection pipeline opening and closing needle valve, and the fire detection pipeline opening and closing valve 4 includes an opening and closing valve body 41 and a needle valve core 42 screwed with the opening and closing valve body 41. By screwing in / out the needle valve core 42, the lifting and lowering of the needle valve core 42 is opened, thereby controlling the opening and closing between the third chamber C and the fire detection pipeline 3; the fire extinguishing agent bottle When storing, the fire detection pipeline opening and closing valve 4 is closed; after the fire extinguishing agent bottle is connected to the fire detection pipeline 3, the fire detection pipeline opening and closing valve 4 is opened to make the bottle head valve in a standby state of temperature-sensing self-starting, that is, the normal state when in use; whether the fire detection pipeline opening and closing valve 4 is opened does not affect the gas replenishment. If it is closed, only the third chamber C is replenished with gas. When it is opened, the third chamber, the first chamber and the fire detection pipeline are connected. If there is a gas leak at the three positions, gas replenishment will be carried out. This gas replenishment situation only belongs to the situation where no fire occurs; a first sealing ring 211 is provided on the blocking end 21, and the first The sealing ring 211 is made of nylon and has good corrosion resistance. An annular groove 101 is provided on the valve body 1, and an annular protrusion 102 for sealing against the first sealing ring 211 is formed on the inner side of the annular groove 101. The air pressure of the first chamber A can also act upward on the blocking end 21 through the annular groove 101, and the area of the first sealing ring 211 affected by the air pressure of the first chamber A is larger than the area affected by the air pressure of the second chamber B, so that the area of the first sealing ring 211 affected by the air pressure of the first chamber A is not easily corroded by carbon dioxide and softened or expanded.
[0031] See also Figure 1-Figure 4, an air replenishing and pressure-maintaining mechanism for replenishing air and maintaining pressure in the third chamber C is provided on the valve core element 2. When air leakage or other reasons occur at the interface of the fire detection pipeline, causing the third chamber C to leak and reduce pressure, part of the gas in the second chamber B is replenished into the third chamber C through the air replenishing and pressure-maintaining mechanism, so that the third chamber C is restored to the normal preset air pressure; to avoid the valve core element from sliding up and opening by mistake due to the air pressure in the third chamber C being too low, and reliable to use; the fire extinguishing agent bottle is filled with high-pressure carbon dioxide, and gas and liquid coexist in the fire extinguishing agent bottle. The air replenishing and pressure-maintaining mechanism includes a second channel 5 and a pressure reducing valve core 6 slidably arranged in the second channel 5, and the second channel 5 is vertically arranged along the valve core element 2. The straight sliding direction is set, and the pressure reducing valve core 6 slides along the through direction of the second channel 5. The pressure reducing valve core 6 is provided with a sealing head 61 for blocking the second channel 5, and the sealing head 61 is made of nylon; the pressure reducing valve core 6 is provided with a conducting cavity 62 for connecting the third chamber C and the second channel 5; when the third chamber C leaks and the pressure is reduced and needs to be replenished, the valve core element remains in a static sealing state, the pressure reducing valve core 6 slides upward, and the sealing head 61 opens the second channel 5, so that part of the gas in the second chamber B flows into the third chamber C to complete the gas replenishment. When the air pressure in the third chamber C is replenished to the normal air pressure, the pressure reducing valve core 6 slides down to block the second channel 5 again.
[0032] See also Figure 1 and Figure 2 A one-way anti-reverse blocking ball 621 is arranged in the conduction cavity 62. The one-way anti-reverse blocking ball 621 is a one-way valve ball, which is closed when facing downward and opened when facing upward. The one-way anti-reverse blocking ball 621 is made of stainless steel. Before the fire extinguishing agent bottle is filled with fire extinguishing agent, it is necessary to open the fire detection pipeline opening and closing valve 4, and fill 1.5MPa nitrogen or other gas into the third chamber C, so that the valve core element slides down and is blocked. Therefore, a one-way anti-reverse blocking ball 621 is arranged to prevent the gas in the third chamber C from flowing to the second chamber B; when replenishing gas, the one-way anti-reverse blocking ball 621 opens upward; in this embodiment, in normal state, that is, in temperature sensing standby mode, the pressure in the first chamber A and the third chamber C is 1.5MPa, and the pressure in the second chamber B is 15MPa.
[0033] See also Figure 1-Figure 4, the second channel 5 includes a first connecting chamber 51 and a second connecting chamber 52, the pressure reducing valve core 6 includes a valve core seat 63 and a valve core guide column 64, in the vertical direction: the first pressure-bearing area S1 of the valve core seat 63 is larger than the second pressure-bearing area S2 of the valve core guide column 64, and the pressure reducing valve core 6 is subjected to a downward force greater than an upward force in a normal state, and can use a large area and a small pressure to press down the pressure reducing valve core 6, that is, in a normal state, the pressure reducing valve core 6 can be pressed down by the smaller air pressure in the third chamber C (compared with the air pressure in the second chamber B) to block the upper port of the second connecting chamber 52; the valve core guide column 64 is slidably placed in the first connecting chamber 51, the first connecting chamber 51 is connected to the conducting chamber 62, and the plugging head 61 is used to seal against the upper port of the second connecting chamber 52; an elastic member 7 is provided between the pressure reducing valve core 6 and the valve core element 2, and a spring is provided on the valve core element 2 for The limit retaining ring 8 for limiting the pressure reducing valve core 6 is placed on the side of the pressure reducing valve core 6 away from the elastic member 7; the elastic member 7 is a compression spring, the upper end of the elastic member 7 abuts against the lower side of the valve core seat 63, and the lower end of the elastic member 7 abuts against the valve core element 2, and the elastic member 7 is used to assist in driving the pressure reducing valve core 6 to slide up and open; in normal state, the elastic force of the compression spring on the pressure reducing valve core 6 is F spring, at this time the downward force on the valve core element 2 is greater than the upward force on it, that is: PC×S1>PB×S2+F spring, and the F spring in the above formula is the elastic force of the compression spring in the compressed state; when the pressure reducing valve core 6 slides up and opens for air replenishment, at this time PC×S1<PB×S2+F spring, and the F spring in this formula is the elastic force of the compression spring in the released state (compared with the former compressed state), and air is replenished when the pressure in the C chamber is less than 1.2MPa in this embodiment.
[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 9, the second channel 5 also includes a third connecting chamber 53, in which a two-way sealing flow-limiting ball 9 is arranged. The two-way sealing flow-limiting ball 9 can seal the third connecting chamber 53 after sliding up and sliding down. A gap for circulating gas is formed between the annular side wall of the two-way sealing flow-limiting ball 9 and the inner side wall of the third connecting chamber 53 to limit the flow rate in the third connecting chamber 53. In this embodiment, the gap is 0.1-0.15mm; in normal state, the two-way sealing flow-limiting ball 9 naturally slides down into place; when filling, the two-way sealing flow-limiting ball 9 is suspended by the gas flow force, that is, it is in a position between sliding down and sliding up; when the fire detection pipeline is ruptured, the air pressure in the third chamber C drops sharply, and at this time, the two-way sealing flow-limiting ball 9 slides up to seal, preventing the gas in the second chamber B from flowing to the third chamber C, so that the valve core element slides up and opens; when the fire extinguishing agent bottle is inflated and nitrogen is filled into the third chamber C, if the one-way blocking ball 621 fails, the two-way sealing flow-limiting ball slides down to seal, which can also temporarily play a sealing effect, so that The utility model has the advantages of reliable use and reasonable structural design; a high-pressure one-way inflation valve 107 for filling the fire extinguishing agent bottle with carbon dioxide is also provided on the valve body 1, and inflation is convenient; a second sealing ring 103 and a third sealing ring 104 are provided between the valve body 1 and the valve core element 2, and a fourth sealing ring 105 and a fifth sealing ring 108 are provided between the valve core element and the pressure reducing valve core to ensure the sealing between the various parts; a powder metallurgy filter 106 is provided at the lower end of the third connecting cavity 53, and the powder metallurgy filter 105 is a copper block with filtering micropores, which is used to filter impurities in the gas flowing from the second chamber B to the third chamber C; in addition, a pressure sensor is installed at the end of the fire detection pipeline, and a weighing device for weighing the fire extinguishing agent bottle is also provided on the outside. Once the total mass of the leaked gas exceeds 5% of the filling mass, an alarm will be sounded, and the engineering personnel will intervene in the maintenance. When the terminal pressure sensor detects that the terminal pressure cannot be replenished (when it is lower than 0.8MPa in this embodiment), an alarm will be sounded, so as to facilitate timely maintenance and ensure the normal operation of the fire extinguishing device.
[0035] The fire extinguishing agent bottle head valve of the temperature-sensing self-starting fire extinguishing device of the utility model has a first chamber and a third chamber whose air pressure is lower than the second chamber under normal conditions, so that the carbon dioxide in the first chamber and the third chamber is not easy to be liquefied, and the sealing ring and other parts are prevented from being corroded by the liquefied carbon dioxide, thereby improving the reliability and stability during use; the fire detection pipeline ruptures at high temperature, so that the carbon dioxide gas in the fire extinguishing agent bottle is discharged from the air outlet to the fire detection pipeline, and finally discharged from the ruptured part of the fire detection pipeline to extinguish the fire source at the location more accurately, realizing the function of automatically sensing the fire and extinguishing the fire, and extinguishing the fire quickly and intelligently; the air pressure in the first chamber can also be moved upward through the annular groove It is used for sealing the end, and the area of the first sealing ring affected by the air pressure of the first chamber is larger than the area affected by the air pressure of the second chamber, so that the part of the first sealing ring affected by the air pressure of the first chamber is not easily corroded by carbon dioxide and softened, expanded and other problems; part of the gas in the second chamber is replenished into the third chamber through the air replenishment and pressure maintaining mechanism to restore the third chamber to the normal preset air pressure; to avoid the valve core element from sliding up and opening due to too low air pressure in the third chamber, and the use is reliable; when nitrogen is filled into the third chamber before the fire extinguishing agent bottle is inflated, if the one-way reverse blocking ball fails, the two-way sealing flow limiting ball slides down to seal, which can also temporarily play a sealing effect, and the use is reliable and the structural design is reasonable.
[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A fire extinguishing agent bottle head valve of a temperature-sensitive self-starting fire extinguishing device, comprising: A valve body (1) and a valve core element (2) movably built into the valve body (1), the valve body (1) being provided with an air inlet (11), an air outlet (12) and a first channel (13) communicating between the air inlet (11) and the air outlet (12), the air inlet (11) being communicated with the bottle mouth of a fire extinguishing agent bottle (100), characterized in that the valve core element (2) comprises a blocking end (21) for blocking the first channel (13), an end of the valve core element (2) away from the blocking end (21) is formed with a force-bearing end (22), a first chamber (A) is formed between the air outlet (12) and the valve core element (2), a first pressure (PA) is present in the first chamber (A), a second chamber (B) is formed between the blocking end (21) and the air inlet (11), a second pressure (P) is present in the second chamber (B), B), a third chamber (C) is formed between the force-bearing end (22) and the valve body (1), a third pressure (PC) is in the third chamber (C), and in normal state, the second chamber (B) and the third chamber (C) are not connected; the valve core element (2) is slidably placed in the valve body (1), and in the sliding direction of the valve core element (2): the area of the blocking end (21) subjected to the air pressure of the first chamber (A) is a first area (SA), the area of the blocking end (21) subjected to the air pressure of the second chamber (B) is a second area (SB), and the area of the force-bearing end (22) subjected to the air pressure of the third chamber (C) is a third area (SC), the first pressure (PA) and the third chamber (C) are both less than the second pressure (PB), and the sum of the first area (SA) and the second area (SB) is less than the third area (SC); In the sliding direction of the valve core element (2): the force direction of the blocking end (21) is the first direction for driving the valve core element (2) to slide and open the first channel (13), and the force magnitude of the blocking end (21) is the first pressure (F1): the first pressure (F1) = the first pressure (PA) × the first area (SA) + the second pressure (PB) × the second area (SB); the force direction of the force-bearing end (22) is the second direction for driving the valve core element (2) to block the first channel (13), the second direction is opposite to the first direction, and the force magnitude of the force-bearing end (22) is the second pressure (F2), the second pressure (F2) = the third pressure (PC) × the third area (SC), and the second pressure (F2) is greater than the first pressure (F1).
2. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 1 is characterized in that: The first chamber (A) and the third chamber (C) are both connected to an external fire detection pipeline (3). Under normal conditions, the air pressures in the first chamber (A), the third chamber (C) and the fire detection pipeline (3) are the same. When the fire detection pipeline (3) ruptures due to fire, the air pressure in the third chamber (C) decreases, so that the valve core element (2) drives the blocking end (21) to slide and open the first channel (13).
3. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 2 is characterized in that: The valve body (1) is provided with a fire detection pipeline opening and closing valve (4), and the fire detection pipeline opening and closing valve (4) is used for connecting / blocking the third chamber (C) and the fire detection pipeline (3).
4. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 1, characterized in that: The blocking end (21) is provided with a first sealing ring (211), the valve body (1) is provided with an annular groove (101), and an annular protrusion (102) for sealing against the first sealing ring (211) is formed inside the annular groove (101).
5. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 1, characterized in that: The valve core element (2) is provided with an air replenishing and pressure maintaining mechanism for replenishing air and maintaining pressure in the third chamber (C). When the third chamber (C) leaks and the pressure drops, part of the gas in the second chamber (B) is replenished into the third chamber (C) through the air replenishing and pressure maintaining mechanism, so that the third chamber (C) returns to normal.
6. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 5, characterized in that: The fire extinguishing agent bottle (100) is filled with high-pressure carbon dioxide, and the gas replenishing and pressure-maintaining mechanism comprises a second channel (5) and a pressure reducing valve core (6) slidably arranged in the second channel (5), the second channel (5) is through-arranged along the sliding direction of the valve core element (2), the pressure reducing valve core (6) slides along the through-direction of the second channel (5), a plugging head (61) for plugging the second channel (5) is arranged on the pressure reducing valve core (6), and a conducting cavity (62) for connecting the third chamber (C) and the second channel (5) is arranged on the pressure reducing valve core (6).
7. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 6, characterized in that: A one-way reverse blocking ball (621) is arranged in the conduction cavity (62).
8. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 6, characterized in that: The second channel (5) comprises a first connecting cavity (51) and a second connecting cavity (52); the pressure reducing valve core (6) comprises a valve core seat (63) and a valve core guide column (64); a first pressure-bearing area (S1) of the valve core seat (63) is larger than a second pressure-bearing area (S2) of the valve core guide column (64); the valve core guide column (64) is slidably disposed in the first connecting cavity (51); the first connecting cavity (51) is in communication with the conducting cavity (62); and the plugging head (61) is used for sealing against an upper end of the second connecting cavity (52).
9. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 6, characterized in that: An elastic member (7) is provided between the pressure reducing valve core (6) and the valve core element (2), and a limit retaining ring (8) for limiting the position of the pressure reducing valve core (6) is provided on the valve core element (2), and the limit retaining ring (8) is placed on a side of the pressure reducing valve core (6) away from the elastic member (7).
10. The fire extinguishing agent bottle head valve of the temperature-sensitive self-starting fire extinguishing device according to claim 6, characterized in that: The second channel (5) further comprises a third connecting cavity (53), and a bidirectional sealing flow-limiting ball (9) is arranged in the third connecting cavity (53).