Fusing valve and fire extinguishing system

Abstract

The utility model is suitable for the technical field of fire fighting equipment, and provides a fusing valve and a fire extinguishing system, and the fusing valve comprises a valve body, a valve rod and a stress application piece. The valve body is provided with a water inlet channel, a water outlet channel and a sealing cavity, the water inlet channel and the water outlet channel are communicated through a communication opening, and a via hole communicated with the sealing cavity is further formed in the side wall of the valve body in a penetrating mode. The valve rod is provided with a first end and a second end which are arranged at intervals in the axial direction of the valve rod, the first end covers the communicating opening, the second end extends into the sealing cavity and extends out of the valve body through the via hole, and a water flow channel is formed in the valve rod and communicates with the water inlet channel and the sealing cavity. The stress application piece is detachably installed on the valve body and abuts against the second end of the valve rod. In addition, the first end of the valve rod can stably cover the communicating opening through the abutting force exerted on the second end of the valve rod by the stress application piece, so that water in the water inlet channel is prevented from entering the water outlet channel, and the phenomenon that a downstream pipeline leaks water at the initial stage of commissioning of the fire extinguishing system is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire-fighting equipment, and more particularly to a fuse valve and a fire-fighting system. BACKGROUND

[0002] The fuse valve is a device capable of being automatically opened when a fire occurs, so that the water in the upstream pipe can enter the downstream pipe network to extinguish the fire, and plays an important role in the field of fire fighting. The main structure of the fuse valve includes a valve body, a valve rod and a closed glass bulb. The valve body is connected with the upstream pipe and the downstream pipe. An upper cavity is formed in the valve body. One end of the valve rod is located at the connection between the upstream pipe and the downstream pipe, and the other end of the valve rod extends into the upper cavity. Part of the water in the upstream pipe can enter the upper cavity through the water flow channel in the valve rod, so as to increase the pressure in the upper cavity, thereby stably covering the valve rod at the connection between the upstream pipe and the downstream pipe. The upper cavity is connected with the closed glass bulb. When the fuse valve receives a fire alarm signal or when the detected ambient temperature reaches a certain value, the closed glass bulb can be automatically broken, so that the upper cavity is depressurized, the pressure of the valve rod acting on the connection between the upstream pipe and the downstream pipe is reduced, and the water in the upstream pipe can push open the valve rod and enter the downstream pipe. The downstream pipe is usually connected with a spray head, and the water is sprayed from the spray head to extinguish the fire at the fire scene.

[0003] However, since there is no water pressure in the upstream pipe and the upper cavity during the initial operation, that is, when the upstream pipe, the downstream pipe and the fuse valve are assembled, it is impossible to ensure that the valve rod in the fuse valve can be stably covered at the connection between the upstream pipe and the downstream pipe. When water is injected into the upstream pipe, the water in the upstream pipe can directly enter the downstream pipe and flow out from the spray head, so that the equipment in the area where the spray head is located is easily mis-sprayed. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the present application is to provide a fuse valve and a fire-fighting system, which aims to solve the technical problem that the existing fire-fighting system is prone to water leakage of the spray head of the downstream pipe during the initial operation.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a fuse valve, which comprises:

[0006] A valve body having a water inlet channel, a water outlet channel and a sealing cavity, the water inlet channel and the water outlet channel being connected through a communication port, and a through hole being further provided in the side wall of the valve body and being connected with the sealing cavity;

[0007] A valve rod having a first end and a second end which are spaced apart along the axial direction of the valve rod, the first end being covered on the communication port, and the second end extending into the sealing cavity and extending out of the valve body through the through hole, a water flow channel being formed in the valve rod and connecting the water inlet channel and the sealing cavity;

[0008] A force adding member is detachably installed on the valve body and abuts against the second end of the valve rod.

[0009] In a possible design, the via hole is formed with a first opening on an outer side of the valve body, the valve body is formed with a connecting portion on the outer side, the connecting portion surrounds an outer periphery of the first opening, and the connecting portion is detachably connected with the force adding member.

[0010] In a possible design, the connecting portion is formed with a first connecting structure, the force adding member is formed with a second connecting structure, and the first connecting structure and the second connecting structure are detachably connected.

[0011] One of the first connecting structure and the second connecting structure is external thread, and the other is internal thread; or one of the first connecting structure and the second connecting structure is a buckle, and the other is a clamping groove.

[0012] In a possible design, the connecting portion is formed with a receiving hole, the force adding member includes a main body portion and an abutting portion connected with each other, and the abutting portion is inserted into the receiving hole and abuts against the second end of the valve rod.

[0013] In a possible design, the first connecting structure is formed on an inner side of the receiving hole, and the second connecting structure is formed on an outer peripheral surface of the abutting portion.

[0014] In a possible design, a side of the abutting portion facing the valve rod is formed with a groove, and at least part of the second end is inserted into the groove.

[0015] In a possible design, an inner surface of the groove is attached to at least part of an outer surface of the second end.

[0016] In a possible design, the receiving hole is coaxially arranged with the via hole.

[0017] In a possible design, the force adding member further includes a force adding rod, the force adding rod is connected with the main body portion, and an extension direction of the force adding rod is arranged at an angle with an axis extension direction of the receiving hole.

[0018] The application further provides a fire extinguishing system, which includes an upstream pipeline, a downstream pipeline and the fuse valve provided in any of the technical solutions.

[0019] The fuse valve provided by the application has the beneficial effects that, compared with the prior art, the fuse valve provided by the application is detachably installed with a force applying piece on the valve body, and the force applying piece abuts against the second end of the valve rod, so that even when the water inlet channel, the water outlet channel and the sealing cavity are all without water pressure in the initial operation period, the abutting force of the force applying piece on the second end of the valve rod can also make the first end of the valve rod stably cover the communication port, and part of water in the water inlet channel enters the sealing cavity through the water flow channel, so that the pressure in the sealing cavity is increased, and then the force applying piece is removed. In this way, the stability of the first end of the valve rod covering the communication port in the initial operation period is improved, and when the fuse valve provided by the application is applied to the fire extinguishing system, the phenomenon of water leakage in the downstream pipeline of the fire extinguishing system in the initial operation period can be effectively avoided.

[0020] The fire extinguishing system provided by the application has the beneficial effects that, compared with the prior art, since the fire extinguishing system provided by the application includes the fuse valve provided in any of the technical solutions, at least all the beneficial effects described above are achieved, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0022] Figure 1 is a semi-partial schematic view of a fuse valve provided by an embodiment of the application;

[0023] Figure 2 is a partial structure cross-sectional schematic view of a fuse valve provided by an embodiment of the application.

[0024] The label details related to the above drawings are as follows:

[0025] 100, valve body, 110, valve seat, 120, valve sleeve, 121, bottom wall, 122, peripheral side wall, 130, valve cover, 131, connecting part, 132, through hole, 133, pressure relief hole, 140, water outlet channel, 141, first chamber, 142, water outlet hole, 150, water inlet channel, 151, second chamber, 152, water inlet hole, 160, sealing cavity, 171, partition plate, 1711, communication port, 1712, annular protrusion, 172, first connecting plate, 173, second connecting plate,

[0026] 200, valve rod, 210, shaft body, 220, covering part, 230, sealing gasket, 240, piston,

[0027] 300, force applying member, 310, main body portion, 320, abutting portion, 321, recess, 330, force applying rod,

[0028] 400, closed glass bubble. DETAILED DESCRIPTION

[0029] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated structure or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0033] In order to illustrate the technical solutions described in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0034] As Figure 1 and Figure 2As shown, one embodiment of the present application provides a fuse valve, which includes a valve body 100, a valve rod 200 and a force adding member 300. The valve body 100 has a water inlet channel 150, a water outlet channel 140 and a sealing cavity 160, the water inlet channel 150 and the water outlet channel 140 are communicated through a communication port 1711, and a through hole 132, which is in communication with the sealing cavity 160, is further arranged in the side wall of the valve body 100. The valve rod 200 has a first end and a second end which are arranged axially spaced apart, the first end covers the communication port 1711, the second end extends into the sealing cavity 160 and extends out of the valve body 100 through the through hole 132, and a water flow channel is formed in the valve rod 200, which is in communication with the water inlet channel 150 and the sealing cavity 160. The force adding member 300 is detachably installed on the valve body 100, and the force adding member 300 abuts against the second end of the valve rod 200.

[0035] The fuse valve provided by the embodiment of the present application can be applied to a fire extinguishing system, the water inlet channel 150 is used to communicate with an upstream pipeline in the fire extinguishing system, and the water outlet channel 140 is used to communicate with a downstream pipeline in the fire extinguishing system. When water starts to be injected into the fire extinguishing system, the water flow first enters the upstream pipeline. The first end of the valve rod 200 abuts at the communication port 1711, which can prevent the water in the upstream pipeline from entering the downstream pipeline.

[0036] In the embodiment of the present application, the communication port 1711 and the through hole 132 are coaxially arranged with the valve rod 200. The axial extension direction of the valve rod 200 can be arranged parallel to the vertical direction, or can be arranged at an angle with the vertical direction. Optionally, the axial extension direction of the valve rod 200 is parallel to the vertical direction, and the first end of the valve rod 200 is below the second end. For the convenience of description, the following description is taken as an example that the axial extension direction of the valve rod 200 is parallel to the vertical direction.

[0037] The fuse valve provided by the embodiment of the present application is detachably installed with the force adding member 300 on the valve body 100, and the force adding member 300 abuts against the second end of the valve rod 200. In this way, even in the initial stage of operation, when the water inlet channel 150, the water outlet channel 140 and the sealing cavity 160 are all without water pressure, the abutting force of the force adding member 300 on the second end of the valve rod 200 can also make the first end of the valve rod 200 stably cover the communication port 1711, thereby effectively preventing the water in the water inlet channel 150 from entering the water outlet channel 140. Part of the water in the water inlet channel 150 can enter the sealing cavity 160 through the water flow channel, so that the pressure in the sealing cavity 160 rises, until the pressure in the sealing cavity 160 balances with the water pressure in the water inlet channel 150, and then the force adding member 300 is removed. At this time, the valve rod 200 can be stably covered on the communication port 1711 under the action of the internal pressure of the sealing cavity 160. In this way, the stability of the first end of the valve rod 200 covering the communication port 1711 in the initial stage of operation is improved, and when the fuse valve provided by the embodiment of the present application is applied to the fire extinguishing system, the phenomenon of water leakage in the downstream pipeline of the fire extinguishing system in the initial stage of operation can be effectively avoided.

[0038] In some optional embodiments, the valve rod 200 includes a shaft body 210 and a covering part 220, the axis of the shaft body 210 is the axis of the valve rod 200, the bottom end of the shaft body 210 is connected with the covering part 220, the covering part 220 is the first end of the valve rod 200, the covering part 220 covers the communication port 1711, and the end of the shaft body 210 away from the covering part 220 is the second end of the valve rod 200. In the cross section perpendicular to the axis of the shaft body 210, the cross section of the covering part 220 is larger than the cross sectional area of the shaft body 210, so as to facilitate complete covering of the communication port 1711. In this embodiment, specifically, the water flow channel is formed in the shaft body 210, the water inlet is formed on the bottom surface of the shaft body 210, and the water outlet is formed on the part of the shaft body 210 located in the sealing cavity 160, the water inlet is communicated with the water inlet channel 150, and the water outlet is communicated with the sealing cavity 160, so that the water in the water inlet channel 150 can enter the sealing cavity 160 along the water flow channel.

[0039] In an example, the covering part 220 is a disc-shaped structure, and the axis of the covering part 220 coincides with the axis of the shaft body 210. The covering part 220 and the shaft body 210 can be connected by screwing, clamping, welding or other arbitrary ways. In an example, the covering part 220 and the shaft body 210 are connected by screwing. Specifically, the valve rod 200 further includes a nut, the bottom end of the shaft body 210 is formed with external threads, the covering part 220 is provided with a first through hole penetrating in the extending direction of the axis thereof, and the bottom end of the shaft body 210 penetrates through the first through hole and is threadedly connected with the nut, so as to lock the covering part 220 on the bottom end of the shaft body 210.

[0040] Optionally, a sealing gasket 230 is further installed below the cover 220, and the cover 220 is covered on the communication port 1711 through the sealing gasket 230. The sealing gasket 230 can be made of flexible materials such as plastic or rubber, so as to improve the sealing effect when the sealing gasket 230 is covered on the communication port 1711. The sealing gasket 230 and the cover 220 can be connected through any mode such as gluing, clamping or screwing. In an example, the sealing gasket 230 is provided with a second through hole in the axial extension direction of the cover 220, and the bottom end of the shaft body 210 is threadedly connected with a nut after sequentially penetrating the first through hole and the second through hole, so as to lock the sealing gasket 230 below the cover 220.

[0041] In an embodiment, as shown in Figure 1 A piston 240 is sleeved on the shaft body 210, the piston 240 is located in the sealing cavity 160 and below the first water outlet, and at least one first sealing ring is installed on the outer peripheral surface of the piston 240, and the first sealing ring respectively abuts against the piston 240 and the inner wall of the sealing cavity 160. In an example, the number of the first sealing rings is two, and the two first sealing rings are arranged in the axial extension direction of the shaft body 210. When the water in the water inlet channel 150 enters the sealing cavity 160 along the water flow channel, the pressure in the sealing cavity 160 is increased, so as to apply a downward abutting force to the piston 240, so that the piston 240 applies a downward abutting force to the shaft body 210, and then the cover 220 installed at the bottom end of the shaft body 210 can be stably covered on the communication port 1711.

[0042] In an embodiment, the through hole 132 is specifically provided through the upper side wall of the valve body 100, and the end of the shaft body 210 away from the cover 220 (i.e. the second end of the valve rod 200) extends out of the valve body 100 through the through hole 132, so as to abut against the force applying member 300. In a possible design, as shown in Figure 1 The through hole 132 is formed with a first opening on the outer side surface of the valve body 100, and the outer side surface of the valve body 100 is formed with a connecting portion 131, the connecting portion 131 is arranged around the outer periphery of the first opening, and the connecting portion 131 is detachably connected with the force applying member 300. The connecting portion 131 is arranged to facilitate the installation of the force applying member 300. Optionally, the connecting portion 131 can be a cylindrical structure, and the force applying member 300 can be inserted into the connecting portion 131 or covered outside the connecting portion 131. Alternatively, the connecting portion 131 includes a plurality of protrusions, the plurality of protrusions are arranged around the axis of the through hole 132 and around the outer periphery of the first opening, and the force applying member 300 can be inserted into the area surrounded by the plurality of protrusions or covered outside the plurality of protrusions.

[0043] In one possible design, a first connecting structure is formed on the connecting portion 131, and a second connecting structure is formed on the force-applying member 300. The first and second connecting structures are detachably connected. Optionally, one of the first and second connecting structures is an external thread, and the other is an internal thread. The force-applying member 300 is detachably connected to the connecting portion 131 by the interaction of the internal and external threads. Alternatively, one of the first and second connecting structures is a snap-fit, and the other is a slot. The force-applying member 300 is also detachably connected to the connecting portion 131 by the snap-fit ​​engaging with the slot.

[0044] In one possible design, such as Figure 1 and Figure 2 As shown, the connecting portion 131 is provided with a receiving hole. The force-applying member 300 includes a main body portion 310 and an abutment portion 320 connected to each other. The abutment portion 320 is inserted into the receiving hole and abuts against the second end of the valve stem 200. In this embodiment, the connecting portion 131 has a cylindrical structure, and the inner hole of the connecting portion 131 is the aforementioned receiving hole. Optionally, the main body portion 310 and the abutment portion 320 can be connected by snap-fitting, screwing, welding, or integral molding. In one example, the main body portion 310 and the abutment portion 320 are connected as a single structure by integral molding.

[0045] In one possible design, the first connecting structure is formed on the inner side of the receiving hole, and the second connecting structure is formed on the outer peripheral surface of the abutment portion 320.

[0046] In some alternative embodiments, the main body 310 is connected to the upper end of the abutting portion 320. When the abutting portion 320 is inserted into the accommodating hole, the main body 310 is located outside the accommodating hole. The first connecting structure and the second connecting structure can be connected or separated by applying a force to the main body 310, thereby facilitating the stable insertion of the abutting portion 320 into the accommodating hole or the removal of the abutting portion 320 from the accommodating hole, i.e., facilitating the disassembly and assembly of the force applying piece 300. Alternatively, the main body 310 can be a prismatic structure, an elliptical cylindrical structure, or other irregular shape structure, so as to facilitate the operator to directly apply a force to the main body 310. In a specific embodiment, the first connecting structure is an internal thread, and the second connecting structure is an external thread. By rotating the main body 310 clockwise (or counterclockwise) around the axis of the accommodating hole, the first connecting structure and the second connecting structure can be connected. By rotating the main body 310 counterclockwise (or clockwise) around the axis of the accommodating hole, the first connecting structure and the second connecting structure can be separated. Alternatively, the force applying piece 300 further comprises a force applying rod 330 connected to the main body 310. The extending direction of the force applying rod 330 is arranged at an angle with the extending direction of the axis of the accommodating hole. In this way, by applying a force to the force applying rod 330, the main body 310 and the abutting portion 320 can be rotated clockwise or counterclockwise around the axis of the accommodating hole. Alternatively, the main body 310 is provided with a through hole in a first direction, and the force applying rod 330 is inserted into the through hole. The first direction is arranged at an angle with the extending direction of the axis of the accommodating hole. Specifically, the first direction can be arranged perpendicular to the extending direction of the axis of the accommodating hole.

[0047] In other embodiments, the main body 310 can be arranged around the outer periphery of the abutting portion 320. The upper end of the main body 310 is connected to the upper end of the abutting portion 320, and the inner side surface of the main body 310 is arranged at a distance from the outer peripheral surface of the abutting portion 320. When the abutting portion 320 is inserted into the accommodating hole, the connecting portion 131 is located between the main body 310, i.e., the main body 310 is arranged around the outer periphery of the connecting portion 131. In this embodiment, the first connecting structure can be formed on the inner side surface of the accommodating hole, and the second connecting structure can be formed on the outer peripheral surface of the abutting portion 320. Alternatively, the first connecting structure can be formed on the outer peripheral surface of the connecting portion 131, and the second connecting structure can be formed on the inner peripheral surface of the main body 310.

[0048] In a possible design, the side of the abutting portion 320 facing the valve stem 200 is formed with a groove 321, and at least part of the second end is inserted into the groove 321. In this arrangement, by arranging the abutting effect between the inner surface of the groove 321 and the valve stem 200, the limiting effect between the abutting portion 320 and the valve stem 200 is improved, thereby improving the stability of the abutting portion 320 abutting against the second end.

[0049] In one possible design, the inner surface of the recess 321 is in contact with at least part of the outer surface of the second end. It can also be understood that the shape of the recess 321 is adapted to the shape of the part of the structure of the second end of the valve stem 200 inserted into the recess 321, so that the inner surface of the recess 321 is in contact with at least part of the outer surface of the second end. The second end of the valve stem 200 is specifically the end of the shaft 210 of the valve stem 200 away from the cover 220, and the outer surface of the part of the structure inserted into the receiving hole is at least partially in the shape of a spherical cap, so that at least part of the inner surface of the recess 321 is in the shape of a spherical cap. In one specific example, the outer surface of the second end includes a first spherical cap surface and a first cylindrical side surface, the first spherical cap surface being connected to the first cylindrical side surface away from the first end, and the inner surface of the recess 321 includes a second spherical cap surface and a second cylindrical side surface, the second spherical cap surface being connected to the second cylindrical side surface away from the opening of the recess 321. In this embodiment, the first spherical cap surface is in contact with the second spherical cap surface, and the first cylindrical side surface is in contact with the second cylindrical side surface.

[0050] In one possible design, the receiving hole is coaxially arranged with the through hole 132. In this way, the receiving hole is coaxially arranged with the axis of the valve stem 200, and when the abutting portion 320 is inserted into the receiving hole, the second end of the valve stem 200 abuts against the middle region of the abutting portion 320, so that the abutting portion 320 is more uniformly stressed.

[0051] In some embodiments, as Figure 1As shown, the valve body 100 comprises a valve seat 110, which is formed with an inner cavity, and the side wall of the valve seat 110 is further formed with a water inlet hole 152, a water outlet hole 142 and a mounting hole, the water inlet hole 152 and the water outlet hole 142 are respectively located on opposite sides of the inner cavity in the horizontal direction, and the mounting hole is located above the inner cavity. A separation part is formed in the inner cavity, which comprises a separation plate 171, a first connecting plate 172 and a second connecting plate 173, the separation plate 171 is arranged parallel to the horizontal direction, and the outer circumferential surface of the separation plate 171 is connected with the inner surface of the inner cavity, a communication port 1711 is arranged vertically through the separation plate 171, the separation plate 171 separates the inner cavity into a first chamber 141 and a second chamber 151, the first chamber 141 is located above the separation plate 171, and the second chamber 151 is located below the separation plate 171. The first connecting plate 172 is arranged parallel to the vertical direction, the first connecting plate 172 is connected to one side of the separation plate 171 close to the water inlet hole 152, and the first connecting plate 172 is connected with the inner surface of the first chamber 141. The second connecting plate 173 is also arranged parallel to the vertical direction, the second connecting plate 173 is connected to one side of the separation plate 171 close to the water outlet hole 142, and the second connecting plate 173 is connected with the inner surface of the second chamber 151. In this embodiment, the first chamber 141 and the second chamber 151 are separated by the first connecting plate 172, the second connecting plate 173 and the separation plate 171, and the first chamber 141 and the second chamber 151 are only communicated through the communication port 1711 on the separation plate 171. In this embodiment, the water outlet hole 142 and the mounting hole are respectively communicated with the first chamber 141, and the water inlet hole 152 is communicated with the second chamber 151. The water inlet hole 152 and the second chamber 151 jointly form the above-mentioned water inlet channel 150, the water inlet hole 152 is used to communicate with the upstream pipeline, and the water outlet hole 142 and the first chamber 141 jointly form the above-mentioned water outlet channel 140, the water outlet hole 142 is used to communicate with the downstream pipeline.

[0052] The valve body 100 further comprises a valve sleeve 120 and a valve cover 130. The valve sleeve 120 comprises a peripheral side wall 122 and a bottom wall 121. The peripheral side wall 122 is provided with an inner hole, and the bottom wall 121 is located in the inner hole, and the outer peripheral surface of the bottom wall 121 is connected with the inner side surface of the peripheral side wall 122. The axis of the inner hole extends in parallel with the vertical direction, and optionally, the axis of the inner hole is arranged in coincidence with the axis of the valve rod 200. The bottom of the peripheral side wall 122 extends into the mounting hole and is threadedly connected with the inner wall of the mounting hole. The valve cover 130 is covered on the end of the peripheral side wall 122 away from the valve seat 110, and the valve cover 130 is threadedly connected with the peripheral side wall 122. The valve cover 130, the peripheral side wall 122 and the bottom wall 121 jointly form a sealing cavity 160. In this embodiment, the through hole 132 is specifically arranged through the valve cover 130, and the connecting portion 131 is specifically formed on the side of the valve cover 130 away from the sealing cavity 160. The bottom wall 121 of the valve sleeve 120 is provided with a third through hole, and the shaft body 210 is sequentially arranged through the through hole 132, the third through hole, the first through hole and the second through hole from top to bottom. The cover portion 220 arranged at the bottom end of the shaft body 210 is located in the first chamber 141 and abuts against the upper surface of the partition plate 171, so that the cover portion 220 covers the communication opening 1711 of the partition plate 171. Optionally, the upper surface of the partition plate 171 is formed with an annular protrusion 1712, which surrounds the outer periphery of the communication opening 1711, and the annular protrusion 1712 abuts against the lower surface of the cover portion 220. When the sealing gasket 230 is arranged below the cover portion 220, the annular protrusion 1712 abuts against the sealing gasket 230.

[0053] Optionally, a second sealing ring is arranged between the peripheral side wall 122 and the inner wall of the mounting hole, and a third sealing ring is arranged between the peripheral side wall 122 and the valve cover 130, so as to ensure the sealing performance of the fuse valve.

[0054] In some embodiments, the side wall of the valve cover 130 is further provided with a pressure relief hole 133, and the pressure relief hole 133 is formed with a second opening on the outer side of the valve cover 130. The fuse valve further comprises a closed glass bulb 400 and an electrically activated device, the closed glass bulb 400 is arranged beside the second opening, and the electrically activated device is installed beside the closed glass bulb 400. The electrically activated device can sense the temperature value in the external environment or receive a fire alarm signal. When the electrically activated device senses that the external environment temperature value rises to a certain value or receives a fire alarm signal, the electrically activated device will break the closed glass bulb 400, so as to release the pressure of the sealed cavity 160, reduce the downward abutting force of the piston 240 in the sealed cavity 160, and reduce the downward pressure of the shaft body 210 (i.e. the valve rod 200), so as to reduce the abutting force of the cover part 220 at the communication port 1711. When the pressure in the sealed cavity 160 is less than the water pressure in the water inlet channel 150, the water in the water inlet channel 150 can push the cover part 220 to move upward, i.e. make the valve rod 200 move upward as a whole, so that the communication port 1711 is opened, and the water in the water inlet channel 150 can enter the water outlet channel 140 and enter the downstream pipeline. The downstream pipeline is connected with a spray head, and the water in the downstream pipeline can be sprayed out through the spray head to extinguish the fire.

[0055] Another embodiment of the present application also provides a fire extinguishing system, which comprises an upstream pipeline, a downstream pipeline and the fuse valve provided by any one of the above embodiments. The water inlet channel 150 in the fuse valve is in communication with the upstream pipeline, and the water outlet channel 140 in the fuse valve is in communication with the downstream pipeline. Since the fire extinguishing system provided by the embodiment of the present application comprises the fuse valve provided by any one of the above embodiments, at least all the beneficial effects of the above are achieved, and details are not repeated here.

[0056] In some embodiments, the downstream pipeline is connected with a spray head. When the electrically activated device in the fuse valve senses that the external environment temperature value rises to a certain value or receives a fire alarm signal, the electrically activated device will break the closed glass bulb 400, so as to release the pressure of the sealed cavity 160, reduce the downward abutting force of the piston 240 in the sealed cavity 160, and reduce the downward pressure of the shaft body 210 (i.e. the valve rod 200), so as to reduce the abutting force of the cover part 220 at the communication port 1711. When the pressure in the sealed cavity 160 is less than the water pressure in the water inlet channel 150, the water in the water inlet channel 150 can push the cover part 220 to move upward, i.e. make the valve rod 200 move upward as a whole, so that the communication port 1711 is opened, and the water in the water inlet channel 150 can enter the water outlet channel 140 and enter the downstream pipeline, and be sprayed out through the spray head to extinguish the fire.

[0057] The above merely provides the optional embodiments of the present application, but not for limiting the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fuse valve, characterized by, The application relates to a valve body, a valve rod and a force adding piece. The through hole is formed with a first opening on the outer side of the valve body, and a connecting part is formed on the outer side of the valve body, the connecting part being arranged around the outer periphery of the first opening, and the connecting part being detachably connected with the force adding piece. The connecting part is formed with a first connecting structure, and the force adding piece is formed with a second connecting structure, the first connecting structure and the second connecting structure being detachably connected. One of the first connecting structure and the second connecting structure is an external thread, and the other is an internal thread; or one of the first connecting structure and the second connecting structure is a buckle, and the other is a clamping groove.

2. The fuse valve of claim 1, wherein The connecting part is arranged around an accommodating hole, the force adding piece comprises a main body part and an abutting part which are connected with each other, and the abutting part is inserted into the accommodating hole and abuts against the second end of the valve rod.

3. The fuse valve of claim 2, wherein The first connecting structure is formed on the inner side of the accommodating hole, and the second connecting structure is formed on the outer peripheral surface of the abutting part. The side of the abutting part facing the valve rod is formed with a groove, and at least part of the second end is inserted into the groove.

4. The fuse valve of claim 3, wherein The inner surface of the groove is attached to at least part of the outer surface of the second end.

5. The fuse valve of claim 4, wherein The accommodating hole is coaxially arranged with the through hole.

6. The fuse valve of claim 4, wherein The force adding piece further comprises a force adding rod, the force adding rod being connected with the main body part, and the extending direction of the force adding rod being arranged at an angle with the extending direction of the axis of the accommodating hole.

7. The fuse valve of claim 6, wherein The application further relates to an upstream pipeline, a downstream pipeline and the fuse valve, the water inlet channel in the fuse valve being communicated with the upstream pipeline, and the water outlet channel in the fuse valve being communicated with the downstream pipeline.

8. The fuse valve of claim 4 wherein, ​ 9. The fuse valve of claim 4 wherein, ​ 10. A fire extinguishing system, characterized in that ​

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