A fire hydrant leakage detection system

Abstract

The present invention discloses a fire hydrant leakage detection system, aiming at the problem of great difficulty in detecting a small amount of leakage in current fire hydrants. The key points of its technical solution are as follows: It includes a box body, the inner cavity of the box body is separated into an upper cavity and a lower cavity by a partition board. A fire hydrant is arranged in the upper cavity, and a number of water-permeable holes are opened on the partition board; A water collecting tank is arranged in the lower cavity, the middle of the water collecting tank is concave and is connected to a water collecting pipe; A transparent detection tank is installed at the lower part of the box body, the detection tank is communicated with the water collecting pipe, and a detection block that changes color when encountering water is filled in the detection tank. The present invention can inspect and observe the leakage situation of the fire hydrant by the way of leakage color display, which is convenient for detecting the leakage situation of the fire hydrant; At the same time, it cooperates with the leakage detection alarm module to realize different sound and light alarms for different leakage amounts, which is convenient for inspectors to detect.

Description

Technical Field

[0001] The present invention relates to a fire detection device, and more specifically, to a fire hydrant leakage detection system. Background Art

[0002] Currently, the device for detecting the leakage of fire hydrants is to install a detection module in the fire pipeline, and detect and identify the leakage of the fire pipeline and fire hydrants through the pressure change inside the pipeline. For example, the Chinese patent application for invention with the publication number CN109011304A discloses a fire hydrant system and a fire hydrant monitoring method, belonging to the field of fire hydrant equipment. The fire hydrant system includes a water supply pipe, a fire hydrant and a water stop valve installed on the water supply pipe. The water stop valve includes a valve body, a valve flap and a valve rod; a monitoring device is fixedly installed on the valve body. The monitoring device includes a sealing shell, a monitoring unit and a battery connection terminal; the monitoring unit includes a flow passage opening and closing state monitoring unit, a flow passage flow rate monitoring unit and / or a flow passage water pressure monitoring unit, and a control module installed in the sealing shell and a wireless communication unit controlled by the control module. Integrating at least one of the flow passage opening and closing state monitoring, water pressure monitoring and flow rate monitoring on the water stop valve can not only obtain more effective information, but also reduce the misjudgment probability or reduce the collection of useless monitoring information, and can be widely applied to fields such as fire hydrants and buildings.

[0003] Again, for example, the Chinese invention patent with the publication number CN108653967B discloses a fire hydrant leakage monitoring system, including a sensor module, a control module, a communication module and a power module; the sensor module, the communication module and the power module are integrated into a fire hydrant leakage monitoring and automatic positioning alarm device, and the fire hydrant leakage monitoring device is detachably installed at the fire hydrant interface.

[0004] In the existing technical solutions, although the leakage of fire hydrants can be detected, they can often only detect the leakage with a large leakage amount, and are applicable to the monitoring of the situation that needs to be urgently repaired after the fire hydrant is damaged; but they cannot be used for the situation of small leakage such as dripping and seepage of fire hydrants.

[0005] Currently, in cities, a large number of fire hydrants are installed in various buildings, office buildings, shopping malls or residential communities. The biggest leakage problem is not the large leakage after being damaged, but the leakage and seepage problems caused by improper installation, maintenance or product quality defects during the installation and maintenance process. The amount of leakage is often not large, and the daily leakage amount may be between dozens and hundreds of milliliters. The slow leakage is not easy to detect. Over time, it will not only cause waste of water resources, but also the unmaintained leakage may affect the rust and damage of fire-fighting facilities.

[0006] Therefore, a new solution is needed to solve this problem. Summary of the Invention

[0007] The object of the present invention is to solve the above problems and provide a fire hydrant leakage detection system, which can conveniently detect the leakage of fire hydrants.

[0008] The above technical object of the present invention is achieved through the following technical solutions: A fire hydrant leakage detection system includes a box body. The inner cavity of the box body is divided into an upper cavity and a lower cavity by a partition. A fire hydrant is arranged in the upper cavity, and a plurality of water-permeable holes are opened in the partition; A water collecting tank is arranged in the lower cavity. The middle of the water collecting tank is concave and is connected to a water collecting pipe; A transparent detection tank is installed at the lower part of the box body. The detection tank is communicated with the water collecting pipe, and a detection block that changes color when encountering water is filled in the detection tank.

[0009] Further, the upper end of the detection tank is open and is covered by an end cover; A seal is provided between the opening of the detection tank and the end cover; A connecting pipe that penetrates up and down is arranged in the middle of the end cover. A connecting hole is opened at the bottom of the box body. The connecting pipe passes through the connecting hole, and the lower end of the water collecting pipe is inserted into the connecting pipe.

[0010] Further, a support ring is arranged at the outer circumference of the connecting pipe corresponding to the upper side of the end cover. An external thread is arranged at the upper end of the connecting pipe corresponding to the position inserted into the lower cavity. A threaded sleeve is threadedly connected to the upper end of the connecting pipe. The threaded sleeve and the support ring respectively press against the upper and lower sides of the lower wall of the box body to realize the fixed connection between the connecting pipe and the box body.

[0011] Further, a seal is realized between the support ring and the box body through a seal; A ring groove is opened at the inner circumference position of the lower end of the threaded sleeve. The ring groove opens downward. A through hole I that communicates the inside and outside is opened at the outer circumference of the lower end of the threaded sleeve. The through hole I opens downward.

[0012] Further, the lower end of the connecting pipe is connected to an extension pipe that extends to the bottom of the detection tank. A gap is formed between the extension pipe and the lower part of the detection pipe; An annular cavity is formed between the inner circumferences of the extension pipe and the detection pipe. The detection blocks are stacked up and down in the annular cavity.

[0013] Further, the detection block includes a detection piece and support pieces fixedly connected to the upper and lower sides of the detection piece. The detection piece can change color in water. The stacked detection blocks are supported by the support pieces, and a gap is formed between adjacent detection blocks; A plurality of water passing holes that penetrate up and down are opened in the support pieces.

[0014] Further, both the detection member and the support member are annular and sleeved on the outer periphery of the connecting pipe. The detection member is made of a water-permeable material, and a water-sensitive coloring agent is provided inside the detection member. The detection member can be a sponge block or a fabric block to enable water permeability. The water-sensitive coloring agent inside it can be anhydrous copper sulfate powder, which is added to the inside of the detection member to make it color when it comes into contact with water; or reagents such as phenolphthalein can also be used for coloring. The detection block is pre-soaked in the detection reagent, then dried and dehydrated, and powders with corresponding acidity and alkalinity are added to the detection member. When water soaks into the detection member, the powders dissolve in the water, and then the coloring reagent can be colored, presenting a leakage color indication.

[0015] Further, a first detection module is provided at the bottom of the detection tank, and a second detection module is provided at the top of the annular cavity. Both the first detection module and the second detection module are switches that can be conducted when encountering water, and are respectively connected to an alarm device. Both the first detection module and the second detection module include a water-permeable block and two conduction terminals. One end of the conduction terminal is coupled to the alarm device, and the other end is inserted into the water-permeable block, and the two conduction terminals are kept separated.

[0016] Further, air guide holes are opened at the top position of the extension pipe corresponding to the annular cavity, and the air guide holes balance the air pressure in the annular cavity; a water-blocking sleeve assembly is provided on the inner periphery of the extension pipe, and the water-blocking sleeve assembly is used to block the upper side of the air guide holes.

[0017] Further, the water-blocking sleeve assembly includes a fixed sleeve and a movable sleeve. A fixed ring fixedly connected to the inner periphery of the fixed extension pipe is provided on the outer periphery of the upper end of the fixed sleeve, and the lower end of the fixed sleeve is located above the air guide holes; an annular gap that is closed on the upper side and open on the lower side is formed between the fixed sleeve and the extension pipe; the movable sleeve is sleeved on the outer periphery of the lower end of the fixed sleeve and can be adjusted up and down.

[0018] Further, a first connecting convex ring is provided on the outer periphery of the lower end of the fixed sleeve, and a second connecting convex ring is provided inside the upper end of the movable sleeve. The first connecting convex ring and the second connecting convex ring are pressed against each other to limit the stroke of the movement; when the upper end surface of the movable sleeve abuts against the fixed ring, the movable sleeve is at the uppermost end of the stroke, and the lower edge of the movable sleeve is higher than the lower edge of the air guide holes; when the second connecting convex ring of the movable sleeve abuts against the first connecting convex ring, the movable sleeve is at the lowermost end of the stroke, and the lower edge of the movable sleeve is lower than the lower edge of the air guide holes.

[0019] Further, a plurality of extension convex blocks are connected to the lower end of the movable sleeve, and through grooves for accumulated water to pass through are formed between the extension convex blocks.

[0020] In summary, the present invention has the following beneficial effects:

[0021] By adopting centralized collection and cooperating with the color-changing effect of the detection blocks that change color when encountering water in the transparent detection tank, the accumulated water converged in the water collection tank can flow into the detection tank. The detection blocks can change color when encountering water. When the detection blocks encounter the water leaked from the fire hydrant, they will change color, making the detection tank show an obvious color-changing situation, which is convenient for the inspection personnel to observe the water leakage situation of the fire hydrant. Compared with directly observing the amount of collected water, the color-changing detection blocks can directly obtain the water leakage situation from the color, which is easier to identify and convenient for the inspection personnel to check.

[0022] In the annular detection cavity of the detection tank, a stacked detection block loading structure from bottom to top is formed; in cooperation with the form of injecting water from bottom to top into the annular cavity through the extension pipe, the amount of water leakage in the detection tank can be judged through the color-changing situation of the detection blocks; and by setting a gas guiding structure at the upper end of the annular cavity, the water can enter the annular cavity stably and smoothly, so that the amount of accumulated water leaking inside the detection tank can be judged more stably and accurately in the detection tank, which is convenient for detection and viewing. Brief Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a fire hydrant water leakage detection system of the present invention;

[0024] Figure 2 It is a schematic installation structure diagram of the detection tank of the present invention;

[0025] Figure 3 It is a partial enlarged view of the detection tank of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the water isolation sleeve assembly of the present invention Figure 1 ;

[0027] Figure 5 It is a schematic structural diagram of the water isolation sleeve assembly of the present invention Figure 2 ;

[0028] Figure 6 It is a schematic structural diagram of the detection block of the present invention Figure 1 ;

[0029] Figure 7 It is a schematic structural diagram of the detection block of the present invention Figure 2 ;

[0030] Figure 8 It is a schematic structural diagram of the detection module of the present invention.

[0031] Reference numerals: 1, box body; 2, partition board; 3, water permeable hole; 4, upper chamber; 5, lower chamber; 51, connection hole; 6, fire hydrant; 7, water collecting tank; 8, support block; 9, water collecting pipe; 10, detection tank; 11, end cover; 12, connecting pipe; 13, extension pipe; 14, detection block; 15, support ring; 16, threaded sleeve; 17, seal; 18, through hole 1; 19, annular groove; 20, through hole 2; 21, detection module 1; 22, detection module 2; 23, annular chamber; 24, air guide hole; 25, fixed sleeve; 26, movable sleeve; 27, extension convex block; 28, through groove; 29, water permeable block; 30, conduction terminal; 251, fixed ring; 252, connecting convex ring 1; 253, annular gap; 261, connecting convex ring 2; 141, support member; 142, detection member; 143, water passing hole; 144, seal sleeve. Detailed implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] This embodiment discloses a fire hydrant leakage detection system, as Figure 1 shown, including a box body 1. The inner cavity of the box body 1 is divided into an upper chamber 4 and a lower chamber 5 by a partition board 2. Among them, the upper chamber 4 is larger and is used to install a fire hydrant 6 and place various fire fighting equipment; the lower layer is a smaller partition layer. Densely distributed water permeable holes 3 are opened on the partition board 2, allowing the water leaked from the fire hydrant 6 to flow downward into the lower chamber 5. A water collecting tank 7 is installed in the lower chamber 5. The upper opening of the water collecting tank 7 is larger and covers the position where the water permeable holes 3 are opened on the partition board 2, and can collect the water flowing out of the upper chamber 4. The middle of the water collecting tank 7 is concave in a shape similar to an inverted cone, and the middle concave part is connected to a water collecting pipe 9, and the leaked water can be collected through the water collecting pipe 9.

[0034] A detection tank 10 is installed at the lower part of the box body 1. The detection tank 10 is communicated with the lower end of the water collecting pipe 9, and the accumulated water converged in the water collecting tank 7 can flow into the detection tank 10. The detection tank 10 is made of a transparent material, such as glass or transparent plastic material, and the internal state can be observed from the outside. A detection block 14 is filled in the inner cavity of the detection tank 10. The detection block 14 can change color when encountering water. When the detection block 14 encounters the water leaked from the fire hydrant 6, it will change color, making the detection tank 10 show an obvious color change situation, which is convenient for the inspection personnel to observe the water leakage situation of the fire hydrant 6. Compared with directly observing the amount of collected water, the color-changing detection block can directly obtain the water leakage situation from the color and is easier to identify. Moreover, since the detection tank 10 is made of a transparent material and the accumulated water is in the detection tank 10, the presence or absence of accumulated water has a similar color. Without color markings, there may be an observation deviation. The color-changing block can play a more obvious reminder role, greatly facilitating the inspection personnel to view.

[0035] As Figure 2 shown, the upper end of the detection tank 10 is open, and the opening is covered by an end cap 11; the end cap 11 and the detection tank 10 are connected by a threaded connection method to form a detachable structure, and a seal 17 is installed between the two to achieve sealing through the seal 17 and prevent the leaked accumulated water from leaking out of the detection tank 10.

[0036] A connection hole 51 is opened at the bottom of the box body 1, and the connection hole 51 corresponds to the position below the water collecting pipe 9; a connecting pipe 12 that penetrates up and down is installed in the middle of the end cap 11. The outer periphery of the connecting pipe 12 is fixed to the end cap 11 and forms a sealed structure. Only the connecting pipe 12 can supply water in and out on the end cap 11. The connecting pipe 12 extends upward through the connection hole 51 and extends into the lower chamber 5. The lower end of the water collecting pipe 9 is inserted into the connecting pipe 12, allowing the accumulated water converged in the water collecting pipe 9 to flow into the detection tank 10, achieving the effect of leaking water convergence and measurement.

[0037] A support ring 15 is fixed at the upper side position of the end cap 11 corresponding to the outer periphery of the connecting pipe 12, and an external thread is formed at the upper end of the connecting pipe 12 corresponding to the position inserted into the lower chamber 5. A threaded sleeve 16 is threadedly connected to the upper end of the connecting pipe 12. The threaded sleeve 16 and the support ring 15 respectively press against the upper and lower sides of the lower wall of the box body 1. By tightening the thread, a clamping structure at the bottom of the box body 1 is formed to realize the fixed connection between the connecting pipe 12 and the box body 1; at the same time, a threaded connection structure is formed, and in cooperation with the structure in which the connecting pipe 12 and the water collecting pipe 9 are sleeved with each other, it is convenient to disassemble and assemble the detection tank 10.

[0038] During the leakage of the fire hydrant 6, some of the leaked water may not be caught by the water collecting tank 7 and directly drip onto the bottom of the lower chamber 5. Therefore, by improving the connection structure between the detection pipe and the box body 1, the detection tank 10 can also catch the accumulated water in the lower chamber 5. An annular sealing groove is formed on the upper end surface of the support ring 15, and a sealing member 17 is installed in the sealing groove to form a sealing structure between the support ring 15 and the box body 1. Furthermore, a relatively sealed state can be formed at the bottom of the lower chamber 5, and the accumulated water will not drip from the gap between the connecting pipe 12 and the connecting hole 51.

[0039] As Figure 3 shown, an annular groove 19 is formed at the inner peripheral position of the lower end of the threaded sleeve 16. The annular groove 19 opens downward and inward. A through hole one 18 communicating with both the inside and the outside is formed on the outer periphery of the lower end of the threaded sleeve 16. The through hole one 18 not only penetrates the inner and outer peripheral surfaces but also opens downward. A plurality of through holes two 20 are formed at the position where the connecting pipe 12 extends into the lower chamber 5. The through holes two 20 are evenly distributed in an annular shape on the outer periphery of the connecting pipe 12. The lower edge height of the through holes two 20 is lower than the bottom surface position of the lower chamber 5, and the upper edge position is higher than the height of the annular groove 19. Through the mutual cooperation of the through hole one 18, the annular groove 19, and the through holes two 20, a continuous water guiding channel can be formed between the inner and outer walls of the threaded sleeve 16 and the connecting pipe 12, enabling the accumulated water at the bottom of the lower chamber 5 to flow into the connecting pipe 12 through the through hole one 18, the annular groove 19, and the through holes two 20. Thus, the accumulated water in the lower chamber 5 can also be collected into the detection tank 10, which can not only reduce the accumulated water in the box body 1 but also increase the confluence of the leaked water, improving the accuracy of leak collection and detection.

[0040] To facilitate the confluence of the accumulated water in the lower chamber 5 into the connecting pipe 12, the bottom of the box body 1 can also be set to be inclined, and the position where the connecting pipe 12 is installed is the lowest point of the bottom of the box body 1, thus facilitating the guiding and converging of the water flow.

[0041] As Figure 2 shown, an extension pipe 13 is connected to the lower end of the connecting pipe 12. The extension pipe 13 is an extended section of the connecting pipe 12 extending into the detection pipe. The extension pipe 13 extends into the bottom of the detection tank 10 and forms a gap with the bottom of the detection tank 10. The accumulated water entering from the connecting pipe 12 flows gently downward along the extension pipe 13.

[0042] An annular cavity 23 is formed on the inner periphery of the extension pipe 13 and the detection pipe. The detection blocks 14 in the detection tank 10 are stacked vertically in the annular cavity 23. The accumulated water flowing into the detection tank 10 can rise relatively gently from the bottom and gradually immerse and discolor the detection blocks 14 from bottom to top. Since the detection blocks 14 are separated in the annular cavity 23 on the outer periphery of the extension pipe 13, the water dripping from the extension pipe 13 will not mistakenly enter the upper detection blocks 14. Instead, it immerses the detection blocks 14 during the rising process from bottom to top. Wherever the accumulated water rises to, the detection blocks 14 will discolor to a close height position. Therefore, the accuracy of the color change indication of the detection blocks 14 can be greatly improved.

[0043] As Figure 2 , 6 shown, the detection block 14 includes a detection element 142 and support elements 141 fixedly connected to the upper and lower sides of the detection element 142. The detection element 142 can change color in water. The detection element 142 is a water-permeable material, and a water-color-changing agent is provided inside the detection element 142. For example, the detection element 142 can be a sponge block or a fabric block to achieve a water-permeable effect. The water-color-changing agent inside it can be anhydrous copper sulfate powder, which is added to the inside of the detection element 142 to make it discolor when it comes into contact with water. Or other reagents such as phenolphthalein can also be used for color change. The detection block 14 is pre-soaked in a detection reagent, then dried and dehydrated, and a powder with corresponding acidity and alkalinity is added to the detection element 142. When water soaks into the detection element 142, the powder dissolves in the water and then can make the color-changing reagent discolor, presenting a color change indication of water leakage.

[0044] The support elements 141 are bonded to both sides of the detection element 142. The stacked detection blocks 14 are supported by the support elements 141, and a gap is formed between the adjacent upper and lower detection blocks 14, which can separate the upper and lower detection blocks 14 from each other, preventing contact penetration between the stacked detection blocks 14 and resulting in the wetting and discoloration of the upper detection blocks 14, and avoiding the occurrence of color change deviation. Moreover, a number of through holes 143 penetrating up and down are provided on the support elements 141, through which the rising accumulated water can flow upward, ensuring smooth water flow.

[0045] Both the detection element 142 and the support elements 141 are annular and sleeved on the outer periphery of the connecting pipe 12, which can adapt to the specific shapes of the annular cavity 23 and the detection tank 10, and can form a larger color change position on the outer periphery of the detection tank 10.

[0046] As Figure 7As shown, sealing sleeves 144 can be sleeved on both the inner and outer circumferences of the annular detection block 14. The sealing sleeves 144 are made of rubber material. After installation, they can be pressed between the support ring 15 and the inner wall of the detection tank 10 to form a relative seal on the outer circumference, and can be pressed between the support ring 15 and the outer circumference of the extension pipe 13 to form a relative seal on the inner circumference. Therefore, at this time, the accumulated water can only flow through the water passing holes 143 in the support block 8, which can reduce the water flow fluctuations caused by shaking or splashing and the resulting impacts.

[0047] As Figure 3 、 4 shown, an air guide hole 24 is opened at the top position of the extension pipe 13 corresponding to the annular cavity 23. Although the extension pipe 13 extends to the bottom position of the detection tank 10, it can reduce the situation of false color development of the upper detection block 14 caused by splashing water. However, when the water submerges the lowest end of the extension pipe 13, due to the relative seal in the annular cavity 23 and the influence of its air pressure, it will be unable to continue injecting water into the annular cavity 23.

[0048] The air guide hole 24 can play a role in balancing the air pressure inside the annular cavity 23 during the process of water inlet at the bottom of the annular cavity 23, so that the water flowing out from the extension pipe 13 at the bottom position of the annular cavity 23 can smoothly enter the annular cavity 23.

[0049] To avoid the situation that the dripping water hanging on the inner wall of the extension pipe 13 flows into the upper side position of the annular cavity 23 through the air guide hole 24, resulting in false color development of the detection block 14 on the upper side of the annular cavity 23; especially when the detection tank 10 is tilted, at this time, the accumulated water flowing down from the extension pipe 13 will directly enter the air guide hole 24 along the wall of the extension pipe 13, and then directly enter the annular detection cavity, which will cause false alarm of color development of the upper detection block 14.

[0050] An anti-water sleeve assembly is installed on the inner circumference of the extension pipe 13. The anti-water sleeve assembly can block the upper side and the inner circumference position of the air guide hole 24. Only an opening facing the outside is formed between the anti-water sleeve assembly and the inner circumference of the extension pipe 13, which can not only realize the air guiding function of the water guiding hole, but also play a role in shielding the air guide hole 24, avoiding the situation that water enters the air guide hole 24 by mistake from the extension pipe 13 and causing false color development.

[0051] As Figure 3 、 4 shown, the anti-water sleeve assembly includes a fixed sleeve 25 and a movable sleeve 26. The outer circumference of the upper end of the fixed sleeve 25 is fixedly connected to the inner circumference position of the extension pipe 13. A fixed ring 251 is fixedly connected between the fixed sleeve 25 and the extension pipe 13 to connect the fixed sleeve 25 inside the extension pipe 13. And the lower end of the fixed sleeve 25 is located above the air guide hole 24, so that the fixed sleeve 25 does not directly shield and cover the air guide hole 24.

[0052] An annular gap 253 that is closed at the upper side and open at the lower side is formed between the fixed sleeve 25 and the extension pipe 13. The movable sleeve 26 adopts a movable mounting structure, which is sleeved on the outer periphery of the lower end of the fixed sleeve 25, that is, it extends into the annular gap 253 and can be adjusted up and down floatingly. The movable sleeve 26 can move downward to block the position of the air guide hole 24, so as to prevent water from entering the air guide hole 24 by mistake. A connecting convex ring one 252 is formed on the outer periphery of the lower end of the fixed sleeve 25, and a connecting convex ring two 261 is formed inside the upper end of the movable sleeve 26. The connecting convex ring one 252 and the connecting convex ring two 261 are pressed against each other, which can limit the up and down stroke of the movable sleeve 26.

[0053] As Figure 4 shown, when there is less accumulated water in the detection tank 10, the movable sleeve 26 is in the lowermost position under the influence of gravity. At this time, the connecting convex ring two 261 of the movable sleeve 26 abuts against the connecting convex ring one 252, and the movable sleeve 26 is at the lowermost end of the stroke; the lower edge of the lower end of the movable sleeve 26 is lower than the lower edge of the air guide hole 24, that is, the movable sleeve 26 can block the outside and the upper side of the air guide hole 24, and can prevent water from entering the air guide hole 24.

[0054] When the water in the detection tank 10 rises, the movable sleeve 26 begins to float upward. Although the lowermost end of the movable sleeve 26 is immersed in the water, after the movable sleeve 26 floats up, the gap between the movable sleeve 26 and the fixed sleeve 25 can allow air to flow through. Furthermore, the air guide hole 24 can still realize the exchange of air flow, so that water can be continuously injected into the detection tank 10. Through the movable sleeve 26, a floating water isolation structure can be formed, a floating air guide structure can be formed, and the stable collection of accumulated water can be maintained all the time.

[0055] As Figure 5 shown, when the water in the detection tank 10 continues to rise and the activity continues to float upward until the upper end face of the movable sleeve 26 abuts against the fixed ring 251, the movable sleeve 26 is at the uppermost end of the stroke. At this time, the lower edge of the lower end of the movable sleeve 26 is higher than the lower edge of the air guide hole 24, and the air guide hole 24 will be directly exposed in the inner cavity of the extension pipe 13. At this time, the accumulated water in the detection tank 10 is also close to the full state, and water can directly enter and exit through the air guide hole 24, so that the detection pipe can collect accumulated water as much as possible.

[0056] A plurality of extension convex blocks 27 are connected to the lower end of the movable sleeve 26, and a through groove 28 for the accumulated water to pass through is formed between the extension convex blocks 27. The through groove 28 does not affect the passage of water flow and does not shield the water guide hole; the extension convex blocks 27 can increase the buoyancy force received by the whole movable sleeve 26, so that in the process of rising water level, the movable sleeve 26 is more likely to float up, and the flexible up and down adjustment of the movable sleeve 26 can be realized.

[0057] On the basis of the above color display, a detection module 1 21 and a detection module 2 22 can also be added to the detection tank 10. Both the detection module 1 21 and the detection module 2 22 are switches that can be turned on when encountering water, and are respectively connected to an alarm device. When the accumulated water in the detection tank 10 rises to the corresponding detection module, the inside of the detection module is connected, and then the corresponding alarm device is connected. The alarm device works to give an alarm, playing a role of reminder.

[0058] The structures of the detection module 1 21 and the detection module 2 22 are the same. As Figure 8 shown, both include a water-permeable block 29 and two conduction terminals 30. The water-permeable block 29 can be made of sponge or plastic material and can permeate water inside and outside; the two conduction terminals 30 are inserted into the water-permeable block 29 and keep the two conduction terminals 30 separated; the other ends of the conduction terminals 30 are coupled to the alarm device, so that the on / off of the conduction terminals 30 can control the operation of the alarm device. When the water-permeable block 29 is immersed in water, the two conduction terminals 30 inside it are conducted and closed, playing a control role.

[0059] The detection module 1 21 is installed at the bottom position of the detection tank 10, which can be at the lower end position of the extension pipe 13. When water starts to enter the detection tank 10, the detection module 1 21 can be connected; the alarm device connected to the detection module 1 21 can be a warning light, and a more obvious warning effect can be achieved through the indication of the warning light; the warning light can be installed at a position far from the box body 1 of the fire hydrant 6 through a wire, for example, it can be in the monitoring room.

[0060] The detection module 2 22 can be installed at the top position inside the annular cavity 23, that is, an alarm can be given when the detection tank 10 is almost full; the alarm device connected to the detection module 2 22 can be a sound alarm device, which can generate a more obvious alarm to facilitate the inspection personnel to check.

[0061] During the inspection process, when the inspection personnel find that there is accumulated water in the detection tank 10, they can focus on inspecting the fire hydrant 6 with potential water leakage hazards. During the inspection process, the accumulated water in the detection tank 10 can be poured out, and the detection block 14 that needs to be replaced can be disassembled and replaced. Whether there is an increase in water leakage can be observed during regular inspections. Since the detection module 2 22 is at a high position in the detection tank 10, when the detection module 2 22 is triggered, it also means a large amount of water leakage. A sound alarm with a greater alarm effect can be used to prompt the inspection personnel or other staff to handle it.

[0062] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A fire hydrant leakage detection system, characterized in that, It includes a box body (1), the inner cavity of the box body (1) is divided into an upper layer cavity (4) and a lower layer cavity (5) by a partition board (2), a fire hydrant (6) is arranged in the upper layer cavity (4), and a plurality of water permeable holes (3) are formed in the partition board (2); a water collecting tank (7) is arranged in the lower layer cavity (5), the middle of the water collecting tank (7) is concave and is connected with a water collecting pipe (9); a transparent detection tank (10) is installed at the lower part of the box body (1), the detection tank (10) is communicated with the water collecting pipe (9), and a detection block (14) that changes color when encountering water is filled in the detection tank (10). The upper end of the detection tank (10) is open and is covered by an end cover (11); a sealing member (17) is used for sealing between the opening of the detection tank (10) and the end cover (11); a connecting pipe (12) that penetrates up and down is arranged in the middle of the end cover (11), a connecting hole (51) is formed at the bottom of the box body (1), the connecting pipe (12) passes through the connecting hole (51), and the lower end of the water collecting pipe (9) is inserted into the connecting pipe (12). The lower end of the connecting pipe (12) is connected with an extension pipe (13) that extends to the bottom of the detection tank (10), and a gap is formed between the extension pipe (13) and the lower part of the detection tank (10); an annular cavity (23) is formed between the extension pipe (13) and the inner circumference of the detection pipe, and the detection blocks (14) are stacked up and down in the annular cavity (23).

2. The water leakage detection system for a fire hydrant according to claim 1, wherein A support ring (15) is arranged at the outer circumference of the connecting pipe (12) corresponding to the upper side position of the end cover (11), an external thread is arranged at the upper end of the connecting pipe (12) corresponding to the position inserted into the lower layer cavity (5), a threaded sleeve (16) is threadedly connected to the upper end of the connecting pipe (12), and the threaded sleeve (16) and the support ring (15) respectively press against the upper and lower sides of the lower wall of the box body (1) to realize the fixed connection between the connecting pipe (12) and the box body (1).

3. The water leakage detection system for a fire hydrant according to claim 2, characterized in that, Sealing is achieved between the support ring (15) and the box body (1) through a sealing member (17); a ring groove (19) is formed at the inner circumference position of the lower end of the threaded sleeve (16), the ring groove (19) opens downward, a through hole one (18) that communicates the inside and outside is formed at the outer circumference of the lower end of the threaded sleeve (16), and the through hole one (18) opens downward.

4. A fire hydrant leakage detection system according to claim 1, wherein The detection block (14) includes a detection piece (142) and support pieces (141) fixedly connected to the upper and lower sides of the detection piece (142), the detection piece (142) can change color when encountering water, the stacked detection blocks (14) are supported by the support pieces (141), and a gap is formed between adjacent detection blocks (14); a plurality of water passing holes (143) that penetrate up and down are formed in the support pieces (141).

5. A fire hydrant leakage detection system according to claim 4, characterized in that Both the detection piece (142) and the support piece (141) are annular and sleeved on the outer circumference of the connecting pipe (12).

6. The fire hydrant leakage detection system according to claim 1, characterized in that, A detection module one (21) is arranged at the bottom of the detection tank (10), and a detection module two (22) is arranged at the top inside the annular cavity (23). Both the detection module one (21) and the detection module two (22) are switches that can be electrically conducted when encountering water, and are respectively connected to an alarm device. Both the detection module one (21) and the detection module two (22) include a water-permeable block (29) and two conducting terminals (30). One end of the conducting terminal (30) is coupled to the alarm device, and the other end is inserted into the water-permeable block (29), and the two conducting terminals (30) are kept separated.

7. The fire hydrant leakage detection system according to claim 1, characterized in that, An air guide hole (24) is opened at the top position of the extension pipe (13) corresponding to the annular cavity (23), and the air guide hole (24) balances the air pressure inside the annular cavity (23). A water isolation sleeve assembly is arranged on the inner circumference of the extension pipe (13), and the water isolation sleeve assembly is used to block the upper side of the air guide hole (24).

8. The water leakage detection system for a fire hydrant according to claim 7, characterized in that, The water isolation sleeve assembly includes a fixed sleeve (25) and a movable sleeve (26). A fixed ring (251) fixedly connected to the inner circumference of the fixed extension pipe (13) is arranged on the outer circumference of the upper end of the fixed sleeve (25), and the lower end of the fixed sleeve (25) is located above the air guide hole (24). An annular gap (253) that is closed at the upper side and open at the lower side is formed between the fixed sleeve (25) and the extension pipe (13). The movable sleeve (26) is sleeved on the outer circumference of the lower end of the fixed sleeve (25) and can be adjusted up and down. A connecting convex ring one (252) is arranged on the outer circumference of the lower end of the fixed sleeve (25), and a connecting convex ring two (261) is arranged inside the upper end of the movable sleeve (26). The connecting convex ring one (252) and the connecting convex ring two (261) are pressed against each other to limit the travel of the movement. When the upper end surface of the movable sleeve (26) abuts against the fixed ring (251), the movable sleeve (26) is located at the uppermost end of the travel, and the lower edge of the movable sleeve (26) is higher than the lower edge of the air guide hole (24). When the connecting convex ring two (261) of the movable sleeve (26) abuts against the connecting convex ring one (252), the movable sleeve (26) is located at the lowermost end of the travel, and the lower edge of the movable sleeve (26) is lower than the lower edge of the air guide hole (24). A plurality of extending convex blocks (27) are connected to the lower end of the movable sleeve (26), and a through groove (28) for accumulated water to pass through is formed between the extending convex blocks (27).

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