Accelerator and dry fire extinguishing system and method of water charging exhaust

Abstract

An accelerator and dry fire extinguishing system and a method for exhausting and water filling thereof. The accelerator for dry fire extinguishing system comprises a valve body, a valve cover, a differential pressure starting assembly; the differential pressure starting assembly comprises a diaphragm, a connecting body, a transmission column and a sealing gasket seat. The dry fire extinguishing system comprises the accelerator and further comprises a water supply pipe network, an air filling pipe network and a dry alarm valve. The method for exhausting and water filling of the dry fire extinguishing system comprises the following steps: the accelerator guides the gas in the air filling pipe network into the middle cavity of the dry alarm valve. The application has better sealing effect and smaller dependence on the spring with the increase of air pressure. The exhaust passage has large sectional area and large exhaust capacity. The pre-tightening force of the spring is adjusted to control the starting sensitivity by screwing the plug; the three-way air inlet can be flexibly connected, and the pressure relief port can be connected to the middle cavity of the dry alarm valve group to destroy the pressure balance in the cavity and start quickly; the independent coaxial check valve core design ensures that the upper cavity is not leaked when the lower cavity is relieved.

Description

Technical Field

[0001] This invention relates to the field of fire protection, and in particular to an accelerator and a dry fire protection system and a method for venting and filling with water. Background Technology

[0002] In the design of automatic sprinkler fire suppression systems, dry sprinkler systems are often used because winter temperatures in the affected area can drop below freezing, causing water pipes to freeze and damage the system, or because some locations do not allow water in the pipes. A dry sprinkler system involves filling the fire suppression pipe network with pressurized gas and selecting dry alarm valves with a specific differential ratio or mechanical type. Dry and wet separation is achieved in the upper and lower chambers of the alarm valve assembly. When a sprinkler head in the network bursts due to a fire, the gas pressure drops to a certain value, disrupting the pressure balance, triggering the valve assembly, and allowing fire water to enter the network to extinguish the fire.

[0003] While dry systems offer numerous advantages, their piping is filled with a large amount of pressurized gas. If a sprinkler head bursts, the pressure in the piping only reaches the alarm valve activation point through the nozzle opening before the valve assembly can be activated. After activation, water pressure must push and expel air from the piping before pressurized water can reach the sprinkler head to extinguish the fire. This significantly delays the extinguishing time. Furthermore, this delay leads to the activation of too many sprinkler heads. Activating too many sprinkler heads not only reduces the spray intensity but also causes non-fired storage areas to become wet, resulting in non-fire-related losses.

[0004] Currently, some dry systems incorporate an accelerator to speed up exhaust. Existing accelerators rely on a return spring to counteract the pressure within the inflation network and close the accelerator's exhaust port. When the pressure drops, the return spring opens the exhaust port to allow exhaust. This design requires a spring with excellent stability; its elasticity curve must remain stable and reliable under long-term deformation, placing high demands on the spring. Furthermore, the internal pressure of the inflation network varies, leading to inconsistent activation points for the exhaust port's sealing seat. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an accelerator and dry fire protection system with fast start-up speed and less affected by the air pressure in the pipeline network, as well as a method for exhausting and filling with water.

[0006] To achieve the above objectives, the technical solution of the present invention is: an accelerator for a dry fire protection system, comprising a valve body, a valve cover, and a differential pressure starting assembly;

[0007] The outer wall of the valve body is provided with an air inlet and an exhaust port. The valve body is provided with a lower chamber, a pressure relief chamber and a pressure relief port. The air inlet is connected to the lower chamber, the exhaust port is connected to the pressure relief chamber, and the pressure relief port is connected to the lower chamber and the pressure relief chamber. The lower chamber is provided with a lower chamber opening at the top of the valve body.

[0008] The valve cover is located above the valve body. The valve cover has an upper cavity with an opening at the bottom of the valve cover. The upper cavity opening faces the lower cavity opening.

[0009] The differential pressure starting assembly includes a diaphragm, a connector, a drive column, and a sealing gasket.

[0010] The diaphragm is located between the valve body and the valve cover, separating the upper chamber and the lower chamber. The connecting body is located in the middle of the diaphragm. The bottom of the connecting body is provided with a sleeve hole communicating with the lower chamber, and the top of the sleeve hole is provided with an air hole communicating with the upper chamber.

[0011] The sealing gasket is located in the lower cavity and below the pressure relief port. The top of the sealing gasket is equipped with a sealing gasket. Moving the sealing gasket upwards can block the pressure relief port with the sealing gasket.

[0012] The transmission column can move up and down within the lower cavity. The upper end of the transmission column can be movably fitted into the sleeve hole. The lower end of the transmission column is connected to the sealing gasket. Moving the transmission column upwards, the upper end of the transmission column can block the air hole.

[0013] The accelerator is installed on the air-filled pipe network of the dry fire suppression system. When a fire occurs, the nozzles in the air-filled pipe network burst, and the gas in the air-filled pipe network rushes out of the nozzles. The air pressure in the air-filled pipe network drops, triggering the accelerator to release gas and accelerating the exhaust speed of the air-filled pipe network.

[0014] The accelerator's pressure relief port and sealing gasket are both located in the lower cavity connected to the inflation pipeline. The pressure in the inflation pipeline compresses the sealing gasket and seals the pressure relief port. The requirements for the spring that resets the sealing gasket are not high. Regardless of the air pressure in the inflation pipeline, the sealing gasket can stably press the pressure relief port. The sealing effect is less affected by the spring performance, and the starting point of the sealing gasket is relatively regular.

[0015] Preferably, the differential pressure starting assembly further includes a check valve core and a valve core spring. The upper part of the connecting body has a valve core cavity communicating with the upper chamber. The check valve core is movable up and down within the valve core cavity. The valve core spring is located within the valve core cavity, with its lower end abutting against the check valve core to push it down. An air hole communicates with the bottom of the valve core cavity; the downward movement of the check valve core blocks the air hole. While the differential pressure starting assembly relies on its own weight to naturally fall and block the air hole at the upper end of the transmission column, thus sealing the upper and lower chambers, this method, although simple in structure, is relatively slow and has slightly insufficient reliability. By incorporating a check valve core and a valve core spring, after the pressure in the upper and lower chambers is balanced, the valve core spring pushes the check valve core down to block the air hole, accelerating the isolation between the upper and lower chambers.

[0016] Preferably, the differential pressure starting assembly further includes an upper limit plate, a lower limit plate, and a nut. The upper and lower limit plates are respectively positioned above and below the diaphragm, clamping the middle of the diaphragm. The middle portions of both the upper and lower limit plates are fitted onto the connecting body. The nut is positioned above the upper limit plate and threadedly connected to the connecting body. The upper cavity has an upper limit step to prevent the upper limit plate from moving upward, and the lower cavity has a lower limit step to prevent the lower limit plate from moving downward. The differential pressure starting assembly can move upward until the upper limit plate is blocked by the upper limit step, and can move downward until the lower limit plate is blocked by the lower limit step. The range of vertical movement of the differential pressure starting assembly is limited to avoid excessive stretching of the diaphragm and defects such as separation of the connecting body from the drive mechanism.

[0017] Preferably, a drain port is provided on the lower side of the valve cover, with the bottom of the drain port close to the top of the diaphragm. The top surface of the lower limit plate is a conical surface that is higher in the middle and lower at the outer periphery. The drain port can be connected to a valve, and venting through the drain port can be used to reset the differential pressure start assembly. Water accumulated in the upper chamber can be discharged from the drain port. The conical structure of the lower limit plate can lift the middle of the diaphragm, drawing water from the bottom of the upper chamber to the outer edge of the upper chamber and discharging it from the drain port.

[0018] Preferably, the bottom of the valve body has a lower threaded hole and a plug below the sealing gasket. The lower threaded hole communicates with the lower cavity, and the plug seals the bottom of the lower threaded hole and is threadedly connected to it. A return spring is installed inside the plug, with its upper end abutting against the bottom of the sealing gasket. The return spring provides an upward thrust to the sealing gasket, accelerating the speed at which the sealing gasket closes the pressure relief port. Rotating the plug adjusts the thrust of the return spring on the sealing gasket.

[0019] Preferably, the valve body includes a disc disposed in the lower cavity and at least two arms. The arms are located on the outer periphery of the disc and extend outward to the inner wall of the lower cavity. A through hole is provided in the middle of the disc, through which a drive column passes. A pressure relief port is located at the bottom of the disc, and the pressure relief port is annular and surrounds the through hole. A pressure relief chamber is located in one of the arms. The pressure relief port is located in the middle of the lower cavity and is annular. The exhaust channel of the pressure relief port can be made very large, resulting in a larger exhaust volume. The sealing gasket seals the pressure relief port based on the pressure difference between the lower cavity and the pressure relief chamber. The sealing gasket can still provide a good seal for the relatively large opening of the pressure relief port.

[0020] Preferably, the valve body has air inlets on the front, rear, and left sides of its outer wall, and an exhaust port on the right side of its outer wall. The valve body has three air inlets and one exhaust port, allowing for flexible connection to an inflation pipeline network.

[0021] A dry fire suppression system includes the aforementioned accelerator, and also includes a water supply network, an air filling network, and a dry alarm valve.

[0022] The dry alarm valve includes a valve body and a valve disc. The valve body has an air chamber, a water chamber, and an intermediate chamber. The valve disc is located inside the valve body, and one end of the valve disc is hinged to the valve body. Rotating the valve disc can open or close the connection between the air chamber and the water chamber. The intermediate chamber is located to the side of the water chamber. When the valve disc covers the water chamber, it also covers the intermediate chamber.

[0023] The water supply network is connected to the water chamber, the accelerator's air inlet is connected to the air filling network, the air filling network is connected to the air chamber, and the accelerator's exhaust port is connected to the intermediate chamber. The gas discharged from the accelerator can enter the intermediate chamber, and together with the water pressure in the water chamber, it pushes the valve disc upward, allowing the valve disc to be opened quickly, so that the water in the water chamber can quickly enter the air filling network.

[0024] A method for venting and filling a dry fire suppression system with water includes the following steps:

[0025] The nozzles in the air-filled pipeline were triggered by the fire and exploded, causing a drop in air pressure within the pipeline.

[0026] The accelerator is triggered to start by a drop in air pressure in the inflation pipeline. After the accelerator starts, it discharges the gas from the inflation pipeline.

[0027] The accelerator directs gas from the inflation pipeline into the intermediate chamber of the dry alarm valve, accelerating the opening of the valve disc within the dry alarm valve.

[0028] After the valve disc inside the dry alarm valve opens, water from the water supply network enters the air-filled network.

[0029] By adopting the above technical solution, the beneficial effects of the present invention are:

[0030] First, this invention achieves a better sealing effect and reduces reliance on springs as air pressure increases. With existing products, the higher the air pressure, the greater the force exerted on the sealing gasket in the opening direction, making it more likely to be pushed open.

[0031] Secondly, the exhaust channel of this invention has a larger cross-sectional area, resulting in a larger exhaust volume. If the exhaust cross-sectional area of ​​existing products is increased, the sealing surface will also increase, the air pressure thrust will increase, and the springs and other components will become more variable.

[0032] Third, the reset spring of this invention mainly serves as a reset booster for the sealing gasket, and the sealing force of the sealing gasket is automatically formed by the air pressure inside the lower cavity. Existing products require the spring to have excellent stability, and the elastic force curve must be stable and reliable under long-term deformation, which places high demands on the spring. Moreover, the starting point of the sealing gasket will not be regular due to the varying internal air pressure.

[0033] The invention allows for adjustment of the starting sensitivity by controlling the preload of the spring through the depth of screwing the plug; the invention features three air inlets and one exhaust outlet, which can be flexibly connected, and the pressure relief port can be connected to the middle cavity of the dry alarm valve assembly to disrupt the pressure balance within the cavity and enable rapid start-up; the independent coaxial check valve core design ensures that the upper cavity does not leak when the lower cavity is depressurized. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the accelerator structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the differential pressure start-up assembly structure of the accelerator according to Embodiment 1 of the present invention;

[0036] Figure 3 This is a schematic diagram of the accelerator of the present invention during startup;

[0037] Figure 4 This is a schematic diagram of the accelerator reset structure according to the present invention;

[0038] Figure 5 This is a schematic diagram of the valve body of the accelerator of the present invention;

[0039] Figure 6 This is a schematic diagram of the differential pressure start-up assembly structure of the accelerator in Embodiment 2 of the present invention;

[0040] Figure 7 This is a structural schematic diagram of the dry fire suppression system of the present invention;

[0041] Figure 8 This is a schematic diagram of the dry fire suppression system of Embodiment 4 of the present invention;

[0042] Figure 9 This is a schematic diagram of the dry alarm valve of the dry fire protection system of the present invention.

[0043] Explanation of key figure labels:

[0044] Accelerator 100; Differential pressure starting assembly 1; Connector 11; Air port 111; Valve core cavity 112; Diaphragm 12; Upper limit plate 13; Lower limit plate 14; Transmission column 15; Rubber pad 151; Sealing gasket seat 16; Sealing gasket 161; Check valve core 17; Valve core spring 18; Valve body 2; Lower cavity 21; Air inlet 211; Pressure relief cavity 22; Pressure relief port 221; Exhaust port 222; Lower limit step 23; Lower screw hole 24; Plug 25; Return spring 26; Disc 27; Arm 28; Valve cover 3; Upper cavity 31; Drain hole 32; Upper limit step 33; Inflation pipeline 4; Dry alarm valve 5; Valve body 51; Air cavity 52; Intermediate cavity 53; Water cavity 54; Valve disc 55; Water supply pipeline 6; Vent pipe 7. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] like Figures 1-5As shown, the present invention provides an accelerator 100 for a dry fire protection system, comprising a valve body 2, a valve cover 3, and a differential pressure start assembly 1.

[0048] The valve body 2 has air inlets 211 on the front, rear, and left sides of its outer wall, and an exhaust port 222 on the right side of its outer wall. The valve body 2 contains a lower chamber 21, a pressure relief chamber 22, and a pressure relief port 221. The air inlet 211 connects to the lower chamber 21, the exhaust port 222 connects to the pressure relief chamber 22, and the pressure relief port 221 connects the lower chamber 21 and the pressure relief chamber 22. The lower chamber 21 has an opening at the top of the valve body 2.

[0049] like Figure 5 As shown, the valve body 2 includes a disc 27 and three arms 28 disposed in the lower cavity 21. The arms 28 are disposed on the outer periphery of the disc 27 and extend outward to the inner wall of the lower cavity 21. The disc 27 has a through hole in the middle, through which the transmission column passes. The pressure relief port 221 is disposed at the bottom of the disc 27. The pressure relief port 221 is annular and surrounds the through hole. The pressure relief chamber 22 is disposed in one of the arms 27.

[0050] like Figure 1 As shown, the valve cover 3 is located above the valve body 2. The valve cover 3 has an upper cavity 31 inside. The upper cavity 31 has an upper cavity opening at the bottom of the valve cover 3, and the upper cavity opening faces the lower cavity opening of the valve body.

[0051] like Figure 2 As shown, the differential pressure start assembly 1 includes a diaphragm 12, a connector 11, a transmission column 15, a sealing gasket 16, a check valve core 17, a valve core spring 18, an upper limit plate 13, a lower limit plate 14, and a nut.

[0052] like Figure 1-4 As shown, the diaphragm 12 is disposed between the valve body 2 and the valve cover 3 and separates the upper chamber 21 and the lower chamber 31. The connecting body 11 is disposed in the middle of the diaphragm 12. The bottom of the connecting body 11 is provided with a sleeve hole communicating with the lower chamber 21, and the top of the sleeve hole is provided with an air hole 111 communicating with the upper chamber.

[0053] Upper limit plate 13 and lower limit plate 14 are respectively located above and below diaphragm 12, clamping the middle of diaphragm 12. The middle of upper limit plate 13 and lower limit plate 14 are both sleeved on connecting body 11. Nut 17 is located above upper limit plate 13 and threadedly connected to connecting body 11. Nut locks upper limit plate 13, diaphragm 12, and lower limit plate 14 onto connecting body 11. Upper cavity 31 is provided with upper limit step 33 to prevent upper limit plate 13 from moving upward, and lower cavity 21 is provided with lower limit step 23 to prevent lower limit plate 14 from moving downward. The lower side of valve cover 3 is provided with drain port 32, the bottom of drain port 32 is close to the top of diaphragm 12, and the top surface of lower limit plate 14 is a conical surface that is high in the middle and low on the outer periphery.

[0054] The sealing gasket 16 is located in the lower cavity 21 and below the pressure relief port 221. The top of the sealing gasket 16 is provided with a sealing gasket 161. The sealing gasket 16 can be moved upward to block the pressure relief port 211.

[0055] The transmission column 15 is movable up and down in the lower cavity 21. The upper end of the transmission column 15 can be movably inserted into the sleeve hole at the bottom of the connecting body 1. The lower end of the transmission column 15 passes through the disc and is connected to the sealing gasket 16. The transmission column 15 and the sealing gasket 16 can move up and down together. When the upper end of the transmission column moves to the top of the sleeve hole, the upper end of the transmission column can block the air hole 111.

[0056] The upper part of the connecting body 11 is provided with a valve core cavity 112 that communicates with the upper cavity 31. The check valve core 17 is movable up and down and is disposed in the valve core cavity 112. The upper part of the nut is provided with a shaft hole, and the upper part of the check valve core can be movably extended into the shaft hole. The valve core spring 18 is disposed in the valve core cavity 112. The lower end of the valve core spring 18 abuts against the check valve core 17 and is used to push the check valve core 17 down. The vent 111 communicates with the bottom of the valve core cavity 112. The downward movement of the check valve core 17 can block the vent 111.

[0057] like Figure 4 As shown, the bottom of the valve body 2 is provided with a lower screw hole 24 and a screw plug 25 below the sealing gasket 16. The lower screw hole 24 is connected to the lower cavity, and the screw plug 25 seals the bottom of the lower screw hole 24 and is threadedly connected to the lower screw hole 24. A return spring 26 is provided inside the screw plug 25. The upper end of the return spring abuts against the bottom of the sealing gasket 16 and the lower end abuts against the screw plug 25. Rotating the screw plug 25 can adjust the thrust of the return spring 26 on the sealing gasket 16.

[0058] The accelerator can be installed on the air-filled piping of a dry fire suppression system, such as... Figure 3 As shown, when the inflation network starts to inflate, the gas in the inflation network enters the lower chamber 21 from the air inlet 211. The gas in the lower chamber 21 has a pressure difference with both the upper chamber 31 and the pressure relief chamber 22.

[0059] The pressure difference between the lower chamber 21 and the upper chamber 31 causes the diaphragm 12 to bulge upward, which in turn moves the connecting body 11 upward. The vent 111 opens, and the gas in the lower chamber 21 enters the vent 111 through the gap between the sleeve hole and the transmission column 15, pushes open the check valve core 17, enters the valve core cavity 112, and then enters the upper chamber 31.

[0060] The pressure difference between the lower chamber 21 and the pressure relief chamber 22, combined with the upward thrust of the reset spring 26, causes the sealing pad 16 to move upward and seal the pressure relief port 221 with the sealing pad 161.

[0061] When the pressure in the upper chamber 31 and the lower chamber 21 is balanced, the check valve core 17 moves downward under the thrust of the valve core spring 18 and blocks the air hole 111, isolating the upper chamber 31 and the lower chamber 21.

[0062] Figure 3and Figure 4 As shown, when a fire occurs, the nozzles of the inflation network burst, releasing gas and causing a pressure drop within the inflation network. This creates a pressure difference between the gas in the upper chamber 31 and the gas in the lower chamber 21. The diaphragm is pushed down by this pressure difference, causing the connector 11 to move the transmission column 15 and the sealing gasket 16 downwards. The pressure relief port 221 is opened, and the gas in the lower chamber 21 is discharged from the pressure relief port 221 through the pressure relief chamber 22 and the exhaust port 222, accelerating the exhaust speed of the inflation network.

[0063] During operation, because the pressure above and below the diaphragm is equal, the downward gravity of the differential pressure starting assembly is supported by the pressure difference between the sealing gasket and the atmosphere, as well as the thrust of the return spring. Therefore, the starting point of the sealing gasket is relatively regular. However, in other products, the springs in the accelerators bear the sealing pre-tightening force of the sealing gasket, the weight of the entire differential pressure assembly, and the pressure exerted on the sealing gasket by the air pressure. This places high demands on the spring's elasticity curve and stability. Furthermore, since the spring's compression deformation is fixed, and the resulting elastic force is designed to be fixed, the starting point of the sealing gasket will be less regular when the internal pressure changes.

[0064] Example 2

[0065] like Figure 1 and Figure 6 As shown, the present invention provides an accelerator 100 for a dry fire protection system, comprising a valve body 2, a valve cover 3, and a differential pressure start assembly 1.

[0066] The valve body 2 has air inlets 211 on the front, rear, and left sides of its outer wall, and an exhaust port 222 on the right side of its outer wall. The valve body 2 contains a lower chamber 21, a pressure relief chamber 22, and a pressure relief port 221. The air inlet 211 connects to the lower chamber 21, the exhaust port 222 connects to the pressure relief chamber 22, and the pressure relief port 221 connects the lower chamber 21 and the pressure relief chamber 22. The lower chamber 21 has an opening at the top of the valve body 2.

[0067] like Figure 5 As shown, the valve body 2 includes a disc 27 and three arms 28 disposed in the lower cavity 21. The arms 28 are disposed on the outer periphery of the disc 27 and extend outward to the inner wall of the lower cavity 21. The disc 27 has a through hole in the middle, through which the transmission column passes. The pressure relief port 221 is disposed at the bottom of the disc 27. The pressure relief port 221 is annular and surrounds the through hole. The pressure relief chamber 22 is disposed in one of the arms 27.

[0068] like Figure 1 As shown, the valve cover 3 is located above the valve body 2. The valve cover 3 has an upper cavity 31 inside. The upper cavity 31 has an upper cavity opening at the bottom of the valve cover 3, and the upper cavity opening faces the lower cavity opening of the valve body.

[0069] like Figure 6As shown, the differential pressure start assembly 1 includes a diaphragm 12, a connector 11, a transmission column 15, and a sealing gasket 16.

[0070] like Figure 1 and Figure 6 As shown, the diaphragm 12 is disposed between the valve body 2 and the valve cover 3 and separates the upper chamber 21 and the lower chamber 31. The connecting body 11 is disposed in the middle of the diaphragm 12. The bottom of the connecting body 11 is provided with a sleeve hole communicating with the lower chamber 21, and the top of the sleeve hole is provided with an air hole 111 communicating with the upper chamber.

[0071] The sealing gasket 16 is located in the lower cavity 21 and below the pressure relief port 221. The top of the sealing gasket 16 is provided with a sealing gasket 161. The sealing gasket 16 can be moved upward to block the pressure relief port 211.

[0072] The transmission column 15 is movable up and down in the lower cavity 21. The upper end of the transmission column 15 can be movably inserted into the sleeve hole at the bottom of the connecting body 1. The lower end of the transmission column 15 passes through the disc and is connected to the sealing gasket 16. The transmission column 15 can move up and down together with the sealing gasket. The upper end of the transmission column 15 is provided with a rubber pad 151. When the upper end of the transmission column moves to the top of the sleeve hole, the rubber pad at the upper end of the transmission column can block the air hole 111.

[0073] The accelerator can be installed on the air-filled piping of a dry fire suppression system, such as... Figure 1 and Figure 6 As shown, when the inflation network starts to inflate, the gas in the inflation network enters the lower chamber 21 from the air inlet 211. The gas in the lower chamber 21 has a pressure difference with both the upper chamber 31 and the pressure relief chamber 22.

[0074] The pressure difference between the lower chamber 21 and the upper chamber 31 causes the diaphragm 12 to bulge upward, which in turn moves the connecting body 11 upward. The vent 111 opens, and the gas in the lower chamber 21 enters the upper chamber 31 through the gap between the sleeve hole and the transmission column via the vent 111.

[0075] The pressure difference between the lower chamber 21 and the pressure relief chamber 22, combined with the upward thrust of the reset spring 26, causes the sealing pad 16 to move upward and seal the pressure relief port 221 with the sealing pad 161.

[0076] After the pressure in the upper chamber 31 and the lower chamber 21 is balanced, the connecting body 11 moves downward under its own weight and the air hole 111 is sealed by the top of the transmission column 15.

[0077] When a fire occurs, the nozzles of the inflation network burst, releasing gas and causing a pressure drop within the network. This creates a pressure difference between the gas in the upper chamber 31 and the gas in the lower chamber 21. The diaphragm 12 is pushed down by this pressure difference, causing the connector 11 to move the drive column 15 and the sealing gasket 16 downwards. This opens the pressure relief port 221, allowing the gas in the lower chamber 21 to escape through the pressure relief port 221, the pressure relief chamber 22, and the exhaust port 222, thus accelerating the exhaust speed of the inflation network.

[0078] Example 3

[0079] like Figure 7 As shown, a dry fire protection system includes the aforementioned accelerator 100, as well as a water supply network 6, an air filling network 4, a dry alarm valve 5, and an air vent pipe 7.

[0080] like Figure 9 As shown, the dry alarm valve 5 includes a valve body 51 and a valve disc 55. The valve body 51 is provided with an air chamber 52, a water chamber 54 and an intermediate chamber 53. The valve disc 52 is located inside the valve body 51, and one end of the valve disc 52 is hinged to the valve body 51. Rotating the valve disc can open or close the connection between the air chamber 52 and the water chamber 54. The intermediate chamber 53 is located on the side of the water chamber 54. When the valve disc 52 covers the water chamber 54, it also covers the intermediate chamber 53.

[0081] Water supply network 6 is connected to water chamber 54, air inlet 21 of accelerator 100 is connected to air filling network 4, and air filling network 4 is connected to air chamber 52. One end of vent pipe 7 is connected to the exhaust port of accelerator, and the other end is connected to external air.

[0082] Example 4

[0083] like Figure 7 As shown, a dry fire protection system includes the aforementioned accelerator 100, as well as a water supply network 6, an air filling network 4, a dry alarm valve 5, and an air vent pipe 7.

[0084] like Figure 9 As shown, the dry alarm valve 5 includes a valve body 51 and a valve disc 55. The valve body 51 is provided with an air chamber 52, a water chamber 54 and an intermediate chamber 53. The valve disc 52 is located inside the valve body 51, and one end of the valve disc 52 is hinged to the valve body 51. Rotating the valve disc can open or close the connection between the air chamber 52 and the water chamber 54. The intermediate chamber 53 is located on the side of the water chamber 54. When the valve disc 52 covers the water chamber 54, it also covers the intermediate chamber 53.

[0085] The water supply network 6 is connected to the water chamber 54, the air inlet 21 of the accelerator 100 is connected to the air filling network 4, the air filling network 4 is connected to the air chamber 52, and the exhaust port 222 of the accelerator 100 is connected to the intermediate chamber 53 of the dry alarm valve 5 through the vent pipe 7.

[0086] like Figure 9The differential dry alarm valve shown has a theoretical differential ratio of 5: that is, N parts of the air chamber pressure can suppress 5N parts of the water chamber pressure. In servo mode, the air chamber pressure is greater than 1 / 5 of the water chamber pressure, generally about 1 / 3 of the water chamber pressure, to ensure safety. When the air chamber pressure drops to 1 / 5 of the water pressure, the valve disc is opened by the water pressure. Its basic operating principle is based on area ratio. The cross-sectional area S1 of the top of the water chamber is 1 / 5 of the valve disc top surface S2 (theoretical value; in practice, the working surface and lever arm must be considered). Therefore, only 1 / 5 of the water pressure is needed to achieve force balance.

[0087] When the accelerator injects air pressure into the intermediate chamber and quickly equalizes it with the pressure in the air supply network, the downward pressure generated by the air pressure is balanced, but the water pressure in the water chamber remains constant. The pressure balance on both sides of the valve disc is then broken, and the valve is activated.

[0088] A method for venting and filling a dry fire suppression system with water, wherein the dry fire suppression system comprises the following steps:

[0089] The nozzles in the air-filled pipeline were triggered by the fire and exploded, causing a drop in air pressure within the pipeline.

[0090] The accelerator is triggered to start by a drop in air pressure in the inflation pipeline. After the accelerator starts, it discharges the gas from the inflation pipeline.

[0091] The accelerator directs gas from the inflation pipeline into the intermediate chamber of the dry alarm valve, accelerating the opening of the valve disc within the dry alarm valve.

[0092] After the valve disc inside the dry alarm valve opens, water from the water supply network enters the air-filled network.

[0093] The above description is merely a preferred embodiment of the present invention and does not limit the scope of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention should still fall within the scope of the present invention.

Claims

1. An accelerator for a dry fire suppression system, characterized in that, Includes valve body, valve cover, and differential pressure start assembly; The outer wall of the valve body is provided with an air inlet and an exhaust port. The valve body is provided with a lower chamber, a pressure relief chamber and a pressure relief port. The air inlet is connected to the lower chamber, the exhaust port is connected to the pressure relief chamber, and the pressure relief port is connected to the lower chamber and the pressure relief chamber. The lower chamber is provided with a lower chamber opening at the top of the valve body. The valve cover is located above the valve body. The valve cover has an upper cavity with an opening at the bottom of the valve cover. The upper cavity opening faces the lower cavity opening. The differential pressure starting assembly includes a diaphragm, a connector, a drive column, and a sealing gasket. The diaphragm is located between the valve body and the valve cover, separating the upper chamber and the lower chamber. The connecting body is located in the middle of the diaphragm. The bottom of the connecting body is provided with a sleeve hole communicating with the lower chamber, and the top of the sleeve hole is provided with an air hole communicating with the upper chamber. The differential pressure starting assembly also includes a check valve core and a valve core spring. The upper part of the connecting body is provided with a valve core cavity that connects to the upper chamber. The check valve core can be moved up and down and is located in the valve core cavity. The valve core spring is located in the valve core cavity. The lower end of the valve core spring abuts against the check valve core and is used to push the check valve core down. The air hole connects to the bottom of the valve core cavity. The check valve core can block the air hole when it moves down. The differential pressure starting assembly also includes an upper limit plate, a lower limit plate, and a nut. The upper limit plate and the lower limit plate are respectively located above and below the diaphragm and clamp the middle of the diaphragm. The middle parts of the upper limit plate and the lower limit plate are both fitted onto the connecting body. The nut is located above the upper limit plate and is threadedly connected to the connecting body. The upper cavity is provided with an upper limit step to prevent the upper limit plate from moving upward, and the lower cavity is provided with a lower limit step to prevent the lower limit plate from moving downward. The top surface of the lower limit plate is a conical surface that is higher in the middle and lower on the outer periphery. The sealing gasket is located in the lower cavity and below the pressure relief port. The top of the sealing gasket is equipped with a sealing gasket. Moving the sealing gasket upwards can block the pressure relief port with the sealing gasket. The transmission column can move up and down and is located in the lower cavity. The upper end of the transmission column can be movably fitted into the sleeve hole. The lower end of the transmission column is connected to the sealing gasket. The transmission column can be moved up and the upper end of the transmission column can block the air hole. The valve body includes a disc located in the lower cavity and at least two arms. The arms are located on the outer periphery of the disc and extend outward to the inner wall of the lower cavity. The disc has a through hole in the middle, through which a transmission column passes. The pressure relief port is located at the bottom of the disc. The pressure relief port is annular and surrounds the through hole. The pressure relief chamber is located in one of the arms.

2. An accelerator for a dry fire suppression system according to claim 1, characterized in that, The bottom of the valve body is provided with a lower screw hole and a screw plug below the sealing gasket. The lower screw hole is connected to the lower cavity, and the screw plug seals the bottom of the lower screw hole and is threadedly connected to the lower screw hole. A return spring is provided inside the screw plug, and the upper end of the return spring abuts against the bottom of the sealing gasket.

3. An accelerator for a dry fire suppression system according to claim 1, characterized in that, The valve body has air inlets on the front, rear, and left sides of its outer wall, and an exhaust port on the right side of its outer wall.

4. A dry fire suppression system, characterized in that, The accelerator, as described in any one of claims 1-3, further includes a water supply network, an air filling network, and a dry alarm valve. The dry alarm valve includes a valve body and a valve disc. The valve body has an air chamber, a water chamber, and an intermediate chamber. The valve disc is located inside the valve body, and one end of the valve disc is hinged to the valve body. Rotating the valve disc can open or close the connection between the air chamber and the water chamber. The intermediate chamber is located to the side of the water chamber. When the valve disc covers the water chamber, it also covers the intermediate chamber. The water supply network is connected to the water chamber, the air inlet of the accelerator is connected to the air filling network, the air filling network is connected to the air chamber, and the exhaust port of the accelerator is connected to the intermediate chamber.

5. A method for venting and filling a dry fire suppression system as described in claim 4, characterized in that, Includes the following steps: The nozzles in the air-filled pipeline were triggered by the fire and exploded, causing a drop in air pressure within the pipeline. The accelerator is triggered to start by a drop in air pressure in the inflation pipeline. After the accelerator starts, it discharges the gas from the inflation pipeline. The accelerator directs gas from the inflation pipeline into the intermediate chamber of the dry alarm valve, accelerating the opening of the valve disc within the dry alarm valve. After the valve disc inside the dry alarm valve opens, water from the water supply network enters the air-filled network.

Images