Gas pressure reducing and conveying device for inert gas fire extinguishing system

Abstract

Gas pressure reducing and conveying device for an inert gas fire extinguishing system, comprising a valve body (02) attached to the inlet of a storage container (01), characterized in that a clamping sleeve (1) is attached to the gas outlet end of the valve body (02), the gas outlet end of the clamping sleeve (1) is provided with a gas outlet head (5) and a connection arrangement (6) for attaching the gas outlet head (5), the clamping sleeve (1) is open with a clamping groove (11), a pressure ring (3) is attached in the clamping groove (11), the pressure ring (3) bears against the gas outlet end of the valve body (02), and a pressure reducing element (2) is provided between the pressure ring (3) and the inside of the clamping groove (11) to limit the gas supply, the pressure reducing element (2) being provided with a limiting region (21) for limiting the gas supply, the area of ​​the limiting region (21) being smaller than the area of ​​the inner hole of the pressure ring (3).

Description

TECHNICAL FIELDThe present application relates to the technical field of gas fire extinguishing systems, in particular to a gas pressure reducing and conveying device for novel inert gas fire extinguishing system.PRIOR ARTCurrently, gas fire extinguishing systems are widely used in various important places such as a data center, archive, museum, etc. In order to ensure that the fire extinguishing agent is released quickly in the event of a fire and can cover the entire protected area, a high-pressure gas cylinder is generally used as a storage container for the fire extinguishing agent. However, the pressure in the high pressure gas cylinder is much higher than the normal working pressure required for the system, so that at the outlet of the gas cylinder a pressure reducing means is required to regulate the pressure.Chinese Patent Publication No. CN214860820U discloses an automatic throttle tank valve for inert gas fire-fighting equipment under ultra-high pressure storage, comprising a main body sleeve, a gas inlet port, a gas outlet port, a throttle assembly, and a shutter assembly, wherein an access cavity is provided in the main body sleeve along the axial direction of the main body sleeve. The gas inlet port is located on the main body sleeve and is disposed coaxial with the main body sleeve. The gas outlet port is on the side of the main body sleeve near the gas inlet port along the radial direction of the main body sleeve. The throttle assembly includes a throttle valve core, a support cover, and an elastic throttle member, wherein the throttle valve core is slidably disposed in the gas outlet hole along the length direction of the gas outlet hole, the support cover is disposed at an end of the gas outlet port opposite from the main body shell, and the elastic throttle member is disposed on the opposite sides of the throttle valve core along the length direction of the gas outlet hole. The closure assembly comprises a closure block and an elastic closure element, wherein the closure block is arranged in the access cavity such that it can be displaced along the axial direction of the main body sleeve and the elastic closure element is arranged on the side of the closure block facing away from the gas inlet hole.In the prior art, the pressure relief of the gas is effected first by the cooperation of the elastic shutter member, the pressure relief cover and the shutter block and then by the cooperation of the two elastic throttle members and the throttle valve core to enable the pressure relief action of the gas. However, the elastic throttle member and the elastic shutter member are springs. Although this arrangement ensures a stable pressure reducing effect, it is known that temperature is a factor affecting the elastic properties of springs. Since the inert gas for fire extinguishing purpose is usually stored compressed in a container at a low temperature, the springs are exposed to more frequent temperature fluctuations by the inert gas as the container valve is used for a longer time and the number of ejections increases. As a result, the elastic properties of the springs gradually deteriorate, with the result that the valve body can no longer maintain the original pressure-reducing effect. The maintenance personnel can only replace the springs, which requires maintenance inside the valve body and complicates maintenance due to the number of assembly and disassembly steps. Since three springs are required for each valve body, the manufacturing costs are considerably higher, which restricts the possibilities of use for throttle container valves and reduces their applicability.CONTENT OF THE PRESENT INVENTIONIn order to improve the applicability of a gas pressure reducing and conveying device, the present application provides a gas pressure reducing and conveying device for novel inert gas fire extinguishing system.The present application provides a gas pressure reducing and conveying device for a novel inert gas fire extinguishing system, which comprises a valve body attached to the inlet of a reservoir, a ferrule being attached to the gas outlet end of the valve body, the gas outlet end of the ferrule being provided with a gas outlet head and a connection assembly for attaching the gas outlet head, the ferrule being opened with a clamping groove, a pressure ring being attached in the clamping groove, the pressure ring abutting against the gas outlet end of the valve body, and a pressure reducing member being provided between the pressure ring and the inside of the clamping groove to restrict gas supply, the pressure reducing member being provided with a restriction portion for restricting gas supply, the area of the restriction portion being smaller than the area of the inner hole of the pressure ring.In the above technical solution, at the time of assembly, the pressure reducing member and the pressure ring are inserted into the clamping groove one after another, the ferrule is screwed to the gas outlet end of the valve body, and finally the gas outlet head is mounted on the gas outlet end of the ferrule by means of the joint assembly to enable the gas pressure reducing and conveying means to be assembled. When extinguishing a fire, inert gas is ejected from the gas outlet end of the valve body. Due to the small area of the restriction portion, the inert gas impinges on the surface of the pressure reducing member for pressure reduction, and is finally ejected through the restriction portion to enable the pressure reducing effect of the inert gas. In maintenance, only the assembling of the collet and the gas discharge head is to be performed, which means fewer assembling and disassembling steps and more efficient maintenance as compared with the prior art, and it is not necessary to assemble a spring, which reduces the influence of the external ambient temperature on the effect of the pressure reduction of the inert gas and improves the applicability of the gas pressure reducing and conveying device.Optionally, the pressure reducing member includes a pressure reducing plate, wherein the pressure reducing plate is disposed between the inside of the clamping groove and the pressure ring, the restriction portion is a pressure reducing hole, and the diameter of the pressure reducing hole is smaller than the diameter of the inner hole of the pressure ring.In the above technical solution, the amount of the inert gas ejected is limited by the pressure reducing hole, and the inert gas impinges on the surface of the pressure reducing plate to enable the pressure reducing effect of the inert gas.Optionally, the pressure reducing member comprises a mounting plate and a lift plate, wherein the collet is opened with a receiving slot corresponding to the location between the inner side of the clamping groove and the pressure ring, the mounting plate is connected to the lower end of the receiving slot, and the lift plate is slidably fitted in the receiving slot, the restriction portion is the portion between the mounting plate and the lift plate, the collet is provided with a driving arrangement for driving the movement of the lift plate.In the above technical solution, the driving assembly drives the lift plate to move, thereby adjusting the distance between the lift plate and the fixing plate and thus adjusting the area of the boundary portion between the lift plate and the fixing plate to make the inert gas impinge on the lift plate and the fixing portion, thereby enabling the effect of reducing the pressure of the inert gas.Optionally, the drive assembly comprises a carrier, a drive rod and a rotating ring, wherein the carrier is connected to the surface of the collet, the carrier is opened with a drive hole, the drive rod is passed through the drive hole, the rotating ring is rotatably connected to the carrier, the drive rod is passed through the rotating ring and is bolted to the rotating ring.In the above technical solution, the rotating ring is rotated in driving the movement of the lift plate, and by the cooperation of the driving rod and the rotating ring and the cooperation of the lift plate and the receiving slot, the driving rod is moved, thereby enabling the effect of driving the movement of the lift plate.Optionally, a sealing arrangement is provided in the clamping groove, the sealing arrangement comprising a first sealing ring and a sealing ring, the first sealing ring being provided between the pressure ring and the gas outlet end of the valve body, and the sealing ring being mounted on the inner side of the clamping groove and abutting the pressure reducing plate.In the above technical solution, the seal ring and the first seal ring are provided to increase the sealing between the collet and the gas outlet end of the valve body and to reduce the possibility of gas leakage between the collet and the valve body.Optionally, the connection arrangement comprises a connection sleeve and a second sealing ring, wherein the connection sleeve is L-shaped in cross section and is screwed to the gas outlet end of the clamping sleeve, one end of the gas outlet head is guided through the connection sleeve, and the second sealing ring is provided in the connection sleeve and abuts the gas outlet head.In the above technical solution, when the gas outlet head is assembled, one end of the gas outlet head is passed through the connecting sleeve, then the second seal ring is inserted into the connecting sleeve, and finally the connecting sleeve is screwed to the gas outlet end of the clamping sleeve until the second seal ring presses against the clamping sleeve, thereby enabling the assembly of the gas outlet head.Optionally, a securing spring is provided on the gas outlet end of the clamping sleeve, wherein the securing spring is arranged between the connecting sleeve and the clamping sleeve.In the above technical solution, the lock spring is used to apply pressure to the connection sleeve, thereby increasing friction between the connection sleeve and the collet and reducing the possibility that the connection sleeve may be loosened due to vibration.Optionally, a filter mesh is attached to the side wall of the pressure reducing plate located near the gas outlet head, the filter mesh covering the pressure reducing hole.In the above technical solution, the filter mesh is used to trap impurities in the inert gas before entering the reservoir, thereby reducing the possibility that the impurities block the valve body or the conveyer when the inert gas is discharged.In summary, the present application has at least one of the following advantageous technical effects: 1. during assembly, the pressure reducing element and the pressure ring are inserted one after the other into the clamping groove, the clamping sleeve is screwed to the gas outlet end of the valve body, and finally the gas outlet head is mounted on the gas outlet end of the clamping sleeve with the aid of the connecting arrangement in order to enable the mounting of the gas pressure reducing and conveying device; When extinguishing a fire, inert gas is ejected from the gas outlet end of the valve body. Due to the small area of the restriction portion, the inert gas impinges on the surface of the pressure reducing member for pressure reduction, and is finally ejected through the restriction portion to enable the pressure reducing effect of the inert gas. In the maintenance, only the assembly of the collet and the gas discharge head is to be performed, which means fewer assembling and disassembling steps and more efficient maintenance as compared with the prior art, and it is not necessary to mount a spring, which reduces the influence of the external ambient temperature on the effect of reducing the pressure of the inert gas and improves the applicability of the gas pressure reducing and conveying means; 2. the driving assembly drives the lift plate to move, thereby adjusting the distance between the lift plate and the fixing plate and thus adjusting the area of the boundary portion between the lift plate and the fixing plate to make the inert gas impinge on the lift plate and the fixing portion, thereby enabling the effect of reducing the pressure of the inert gas; 3. the rotary ring is rotated upon driving the movement of the lift plate, and by the cooperation of the drive rod and the rotary ring and the cooperation of the lift plate and the receiving slot, the drive rod is moved, thereby enabling the effect of driving the movement of the lift plate.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic diagram of the overall structure of the gas pressure reducing and conveying device in an embodiment 1 of the present application. FIG. 2 is an exploded view for embodying the internal structure of a collet in Embodiment 1 of the present application. FIG. 3 is a sectional view for embodying the internal structure of the collet in Embodiment 1 of the present application. FIG. 4 is an exploded view for embodying the structure of a gas outlet head and a joint assembly in Embodiment 1 of the present application. FIG. 5 is a sectional view for embodying the structure of a gas outlet head and a joint assembly in Embodiment 1 of the present application. FIG. 6 is a schematic diagram showing the structure of the gas pressure reducing and conveying device in an embodiment 2 of the present application. FIG. 7 is an exploded view for embodying the structure of a pressure reducing member and a drive assembly in Embodiment 2 of the present application. FIG. 8 is a sectional view for embodying the structure of a pressure reducing member and a drive assembly in Embodiment 2 of the present application.DETAILED DESCRIPTIONThe present application is described in more detail below in connection with FIGS. 1-8.According to an embodiment 1 of the present application, a gas pressure reducing and conveying device for a novel inert gas fire extinguishing system is disclosed. Referring to FIGS. 1, 2 and 3, the gas pressure reducing and conveying device for a novel inert gas fire extinguishing system includes a valve body 02 attached to the inlet of a reservoir tank 01, a collet 1 is provided at the gas outlet end of the valve body 02, an end of the collet 1 is opened with a clamping groove 11, and the collet 1 is screwed to the gas outlet end of the valve body 02 through the clamping groove 11.Referring to FIGS. 2 and 3, a pressure reducing member 2 and a pressure ring 3 are provided in the collet 1, the pressure reducing member 2 is a pressure reducing plate 22, the pressure reducing plate 22 is opened with a restricting portion 21, the restricting portion 21 is a pressure reducing hole in this embodiment, and the pressure reducing plate 22 is fitted to and abuts on the inside of the clamping groove 11. The pressing ring 3 is provided between the pressure reducing plate 22 and the gas outlet end of the valve body 02, and the inner diameter of the pressure reducing hole is smaller than the inner diameter of the pressing ring 3. On the side wall of the pressure reducing plate 22 located near the gas outlet end of the clamping sleeve 1, a filter mesh 221 is attached, which serves to trap impurities in the inert gas before it reaches the storage container 01.Referring to FIGS. 2 and 3, a sealing arrangement 4 is provided in the clamping sleeve 1, wherein the sealing arrangement 4 comprises a first sealing ring 41 and a sealing ring 42. The first seal ring 41 is a rubber ring provided between the pressing ring 3 and the gas outlet end of the valve body 02. The seal ring 42 is a rubber ring fitted in the inside of the clamping groove 11 and abutting on the pressure reducing plate 22. The sealing arrangement 4 serves to improve the sealing between the clamping sleeve 1 and the gas outlet end of the valve body 02.Referring to Figs. 1, 4 and 5, the gas outlet end of the collet 1 is provided with a gas outlet head 5 and a connection assembly 6, the connection assembly 6 comprising a connection sleeve 61 and a second sealing ring 62. The connecting sleeve 61 is L-shaped in cross section and is screwed to the gas outlet end of the clamping sleeve 1. One end of the gas outlet head 5 is passed through the collet 1. The second seal ring 62 is a rubber ring provided in the connection sleeve 61 and fitted to and abutting against the other end of the gas outlet head 5. A securing spring 12 is provided on the gas outlet end of the clamping sleeve 1, wherein the securing spring 12 is arranged between the connecting sleeve 61 and the clamping sleeve 1.The principle of the gas pressure reducing and conveying device for a novel inert gas fire extinguishing system according to Embodiment 1 of the present application is as follows: In the assembling, the pressure reducing plate 22, the pressure ring 3 and the first seal ring 41 are sequentially inserted into the clamping groove 11, then the collet 1 is screwed to the gas outlet end of the valve body 02, then the gas outlet head 5 is passed through the connecting sleeve 61, and the second seal ring 62 is inserted into the connecting sleeve 61, and finally the connecting sleeve 61 is screwed to the gas outlet end of the collet 1, so that the assembling of the gas pressure reducing and conveying device is enabled.In venting, the inert gas enters the clamping groove 11 from the gas outlet end of the valve body 02, impinges on the surface of the pressure reducing plate 22, and finally passes through the pressure reducing hole and the gas outlet head 5 one by one, thereby enabling the effect of reducing the pressure of the inert gas.In maintenance, only the assembling of the collet 1 and the gas discharge head 5 is to be performed, which means fewer assembling and disassembling steps and more efficient maintenance as compared with the prior art, and it is not necessary to assemble a spring, which reduces the influence of the external ambient temperature on the effect of the pressure reduction of the inert gas and improves the applicability of the gas pressure reducing and conveying device.Embodiment 2: The difference between this embodiment and Embodiment 1 lies in the different structure of the pressure reducing member 2.Referring to FIGS. 6, 7 and 8, the pressure reducing member 2 includes a fixing plate 23 and a lift plate 24. the surface of the collet 1 is opened with a receiving slot corresponding to the location between the pressure ring 3 and the inside of the clamping groove 11, the fixing plate 23 is fixedly connected to the lower end of the receiving slot, and the lift plate 24 is slidably fitted in the receiving slot and is disposed above the fixing plate 23. The region between the lifting plate 24 and the fastening plate 23 is in this embodiment a delimiting region 21, a third sealing ring 131 being let into the receiving slot, wherein the third sealing ring 131 is a rubber ring.Referring to Figs. 7 and 8, the collet 1 is provided with a drive assembly 7, the drive assembly 7 comprising a carrier 71, a drive rod 72 and a rotation ring 73. The carrier 71 is fixedly connected to the collet 1, and the carrier 71 is opened with a driving hole. The drive rod 72 is guided through the drive hole and is firmly connected to the lifting plate 24. The rotary ring 73 is rotatably connected to the carrier 71 and is screwed to the drive rod 72. A retaining nut 731 is screwed onto the drive rod 72, the retaining nut 731 pressing against the rotary ring 73. The lock nut 731 serves to lock the rotation ring 73 against disengagement.By rotating the rotary ring 73 to adjust the position of the lift plate 24, the size of the area of the restriction portion 21 can be adjusted, thereby enabling the gas pressure reducing and conveying means to act in adjusting the pressure of the inert gas upon venting.The above embodiments are the better embodiments of the present application and are not intended to limit the scope of the present application, so that all equivalent changes made in accordance with the structure, shape and principle of the present application fall within the scope of the present application.List of reference characters01 Storage container 02 Valve body 1 Clamping sleeve 11 Clamping groove 12 Securing spring 131 Third sealing ring 2 Pressure reducing element 21 Delimiting region 22 Pressure reducing plate 221 Filter grid 23 Fastening plate 24 Lifting plate 3 Pressure ring 4 Sealing arrangement 41 First sealing ring 42 Sealing ring 5 Gas outlet head 6 Connecting arrangement 61 Connecting sleeve 62 Second sealing ring 7 Drive arrangement 71 Carrier 72 Drive rod 73 Rotating ring 731 Securing nutReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedCN 214860820U

[0003]

Claims

A gas pressure reducing and conveying device for inert gas fire extinguishing system, comprising a valve body (02) attached to the inlet of a reservoir (01), characterized in that a ferrule (1) is attached to the gas outlet end of the valve body (02), the gas outlet end of the ferrule (1) is provided with a gas outlet head (5) and a connection assembly (6) for attaching the gas outlet head (5), the ferrule (1) is opened with a clamping groove (11), a pressure ring (3) is attached in the clamping groove (11), the pressure ring (3) abuts the gas outlet end of the valve body (02), and a pressure reducing member (2) is provided between the pressure ring (3) and the inside of the clamping groove (11) to restrict gas supply, the pressure reducing member (2) is provided with a restriction portion (21) for restricting gas supply, the area of the restriction portion (21) being smaller than the area of the inner hole of the pressure ring (3).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 1, characterized in that the pressure reducing member (2) comprises a pressure reducing plate (22), the pressure reducing plate (22) is disposed between the inside of the clamping groove (11) and the pressure ring (3), the restricting portion (21) is a pressure reducing hole, and the diameter of the pressure reducing hole is smaller than the diameter of the inner hole of the pressure ring (3).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 1, characterized in that the pressure reducing member (2) comprises a mounting plate (23) and a lift plate (24), the collet (1) is opened with a receiving slot corresponding to the location between the inside of the clamping groove (11) and the pressure ring (3), the mounting plate (23) is connected to the lower end of the receiving slot, and the lift plate (24) is slidably fitted in the receiving slot, the restriction portion (21) is the portion between the mounting plate (23) and the lift plate (24), the collet (1) is provided with a driving arrangement (7) for driving the movement of the lift plate (24).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 3, characterized in that the driving assembly (7) comprises a carrier (71), a driving rod (72), and a rotating ring (73), the carrier (71) being connected to the surface of the collet (1), the carrier (71) being opened with a driving hole, the driving rod (72) being passed through the driving hole, the rotating ring (73) being rotatably connected to the carrier (71), the driving rod (72) being passed through the rotating ring (73), and being screwed to the rotating ring (73).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 2, characterized in that a sealing arrangement (4) is provided in the clamping groove (11), the sealing arrangement (4) comprising a first sealing ring (41) and a sealing ring (42), the first sealing ring (41) is provided between the pressing ring (3) and the gas outlet end of the valve body (02), and the sealing ring (42) is attached to the inside of the clamping groove (11) and abuts against the pressure reducing plate (22).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 1, characterized in that the connecting arrangement (6) comprises a connecting sleeve (61) and a second sealing ring (62), wherein the connecting sleeve (61) is L-shaped in cross section and screwed to the gas outlet end of the clamping sleeve (1), one end of the gas outlet head (5) is guided through the connecting sleeve (61), and the second sealing ring (62) is provided in the connecting sleeve (61) and abuts the gas outlet head (5).Gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 6, characterised in that a securing spring (12) is provided on the gas outlet end of the clamping sleeve (1), the securing spring (12) being arranged between the connecting sleeve (61) and the clamping sleeve (1).The gas pressure reducing and conveying device for inert gas fire extinguishing system according to claim 2, characterized in that a filter mesh (221) is attached to the side wall of the pressure reducing plate (22) located near the gas discharge head (5), the filter mesh (221) covering the pressure reducing hole.

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