Fire-fighting water intake for semi-underground fire pool

Abstract

The fire-fighting water intake comprises a protective well, a well lid covering a well mouth of the protective well and a straight pipe connected with a water outlet of the semi-underground fire-fighting water pool, the end, away from the semi-underground fire-fighting water pool, of the straight pipe is connected with a vertical pipe, and a top port of the vertical pipe extends into the protective well and is detachably connected with a sealing plate. A through hole is formed in the sealing plate and connected with a connector pipe, and a pipe opening of the connector pipe is provided with an inner buckling type water suction pipe connector used for being connected with a water taking pipe of a fire fighting truck. According to the fire-fighting water intake for the semi-underground fire-fighting pool, safe and rapid water intake of a fire-fighting truck is ensured, and the fire-fighting truck is ensured to fully utilize the water quantity of the fire-fighting pool in a fire disaster period.

Description

Technical Field

[0001] This application belongs to the field of fire protection, specifically relating to a fire water intake for a semi-underground fire water tank. Background Technology

[0002] A fire water tank is an artificially constructed water storage facility used to store fire-fighting water needed during a fire. According to the "Technical Specification for Fire Water Supply and Fire Hydrant Systems" GB50974-2014, fire water tanks storing outdoor fire-fighting water or providing water for fire trucks should be equipped with water intakes (wells) to facilitate water extraction for fire trucks. The suction height should not exceed 6.0m, and the distance between the water intake or well and the exterior wall of the protected building (excluding pump rooms) should not be less than 15m. There are various types of fire water tanks, such as fully above-ground, fully underground, and specially made stainless steel fire water tanks. However, in actual engineering projects, considering factors such as land area, investment, frost protection, and usage, many projects consider using semi-underground fire water tanks. Semi-underground fire water tanks are partially underground and partially above ground, combining the characteristics of underground and above-ground tanks, offering convenient water access while saving space.

[0003] Regarding the installation forms of fire-fighting water intakes, the current standard drawings include three types: outdoor fire hydrants, water intake wells, and water intake well cylinders. Outdoor fire hydrants, as one of the most common fire-fighting water intake facilities, are directly connected to the municipal water supply network or above-ground water tanks, offering advantages such as rapid response and ease of operation. Water intake wells are suitable for areas without or with insufficient municipal water supply, providing a water source for fire fighting by drawing water from underground water tanks. Water intake well cylinders are usually used in conjunction with water intake wells to raise groundwater to the surface for fire trucks or fire hoses to draw water. However, there is no particularly suitable fire-fighting water intake form for semi-underground fire water tanks. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a fire water intake for a semi-underground fire water tank, ensuring that fire trucks can safely and quickly draw water and making full use of the water volume in the fire water tank during a fire.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A fire water intake for a semi-underground fire water tank includes a protective well, a well cover covering the well opening, and a straight pipe connected to the outlet of the semi-underground fire water tank. The end of the straight pipe away from the semi-underground fire water tank is connected to a riser. The top end of the riser extends into the protective well and is detachably connected to a sealing plate. The sealing plate has a through hole and is connected to an interface pipe. The interface pipe is equipped with a valve, and the pipe opening of the interface pipe is equipped with an internally fastened suction pipe interface for connecting to the fire truck's own water intake pipe.

[0007] Furthermore, the protective well can be circular or square, with a well opening diameter or side length (or length and width dimensions) of 800-1000 mm, and a depth of 300-500 mm. A horizontal step is formed at the top of the protective well to support the well cover. The protective well is 80-150 mm above the ground to prevent ground water from flowing into the protective well. The well wall material can be reinforced concrete or concrete modules, for example. The top surface of the well cover is preferably flush with the top surface of the well wall. The well cover is used to prevent foreign objects from entering the protective well. The well cover is preferably a double-layer insulated well cover.

[0008] Furthermore, one end of the straight pipe is connected to the outlet of the sump of the semi-underground fire water tank, and the other end is connected to the riser via an elbow, such as a 90-degree elbow. The specifications of the straight pipe and the riser can be, for example, DN400. The straight pipe and the riser can be, for example, one of welded steel pipe, seamless steel pipe, or spiral welded steel pipe. Both the riser and the straight pipe are buried pipelines.

[0009] Furthermore, the straight pipe branches into multiple branch pipes, each of which is connected to the sump of a semi-underground fire water tank, making it suitable for the combined use of multiple semi-underground fire water tanks. Each branch pipe is equipped with a valve well.

[0010] Furthermore, the portion of the riser near the port and the interface pipe are all wrapped with an insulation layer to prevent the water inside the pipe from freezing. An external protective layer is provided outside the insulation layer. The thickness of the insulation layer can be, for example, 50-200mm. The insulation material can be, for example, a rubber-plastic pipe shell or an electric heating tape. The installation depth of the insulation layer is 300-500mm greater than the frost depth of the project site to enhance the antifreeze effect. The material of the protective layer can be, for example, a thin stainless steel plate.

[0011] Furthermore, the sealing plate is a blind flange, and a number of first holes are arranged in a circular array near the periphery of the blind flange. For example, there can be 2-3 first holes. The sealing plate is used to prevent water above ground level in the semi-underground fire water tank from overflowing, and the through hole is set in the center of the sealing plate.

[0012] Furthermore, the riser has a flange at its port that connects to the sealing plate. The flange has multiple second holes, the number and position of which correspond to the first holes. When the sealing plate is connected to the flange, the position of the sealing plate is adjusted so that the first and second holes are coaxial. After the bolt passes through the first and second holes, the nut is screwed in and tightened to achieve the connection between the flange and the sealing plate.

[0013] Furthermore, the internally snapped suction pipe interface is, for example, a KD100 type internally snapped suction pipe interface. The distance between the internally snapped suction pipe interface and the well cover can be, for example, 100-300mm, preferably about 200mm. In one embodiment, the internally snapped suction pipe interface includes an inner pipe, an outer sleeve fitted onto the outer wall of the inner pipe, multiple snap claws fixed to the outer sleeve, a sealing ring connected to the port of the inner pipe, and arc-shaped retaining strips protruding inward on the outer sleeve between adjacent snap claws. The outer sleeve includes a coarse cylindrical part, a fine cylindrical part, and a transition part connecting the coarse cylindrical part and the fine cylindrical part. The transition part is an annular plate. The inner pipe is connected to the inner ring of the transition part, the fine cylindrical part is connected between the inner and outer rings of the transition part, and the coarse cylindrical part is connected to the outer ring of the transition part. The coarse cylindrical part and the inner pipe form an annular mating cavity. The end face of the inner pipe is, for example, flush with the end face of the coarse cylindrical part. There can be, for example, 2-3 snap claws, which are evenly distributed along the circumference of the outer sleeve. The device includes a support portion extending axially from the inner wall of the coarse cylinder, and a snap-fit ​​portion protruding radially from the end of the support portion along the coarse cylinder. The sealing ring can be made of, for example, rubber. A snap-fit ​​strip is connected to the inner wall of the coarse cylinder. The length of the snap-fit ​​strip is less than the arc length between two adjacent snap claws, thereby forming an insertion port between the snap claws and the snap-fit ​​strip for the snap claws of another internal snap-fit ​​water suction pipe interface to enter the docking cavity. The snap-fit ​​strip includes an abutment surface flush with the end face of the coarse cylinder and a curved surface connecting the abutment surface and the inner surface of the coarse cylinder. The cross-section of the snap-fit ​​strip along the radial direction of the coarse cylinder is wedge-shaped. The thickness of the snap-fit ​​strip is greater than the length of the support portion to ensure that the end faces of the coarse cylinders of the two docking internal snap-fit ​​water suction pipe interfaces coincide. At the same time, the sealing ring is compressed to achieve the purpose of sealing and prevent leakage of fire-fighting water. In practical applications, the fire truck's own water intake pipe connects to an internally clipped suction pipe interface. This internally clipped suction pipe interface is designated as the first internally clipped suction pipe interface (the internal pipe of the fire truck's own water intake pipe connects to the first internally clipped suction pipe interface). The internally clipped suction pipe interface connected to the interface pipe is designated as the second internally clipped suction pipe interface (the internal pipe of the interface pipe connects to the second internally clipped suction pipe interface). The first and second internally clipped suction pipe interfaces are compatible, allowing for connection between the fire truck's own water intake pipe and the interface pipe. When the two internally snapped suction pipe interfaces are rotated, their locking claws enter each other's mating chambers through the insertion port. The first internally snapped suction pipe interface is rotated, and its locking part abuts against the curved surface of the second internally snapped suction pipe interface. At the same time, the two sealing rings are compressed to ensure the sealing of the mating position of the two internal pipes, realizing the quick connection between the fire truck's own water intake pipe and suction pipe, improving the water intake efficiency in emergency situations. When it is necessary to disconnect, the first internally snapped suction pipe interface is rotated in the opposite direction to pull the locking part of the first internally snapped suction pipe interface out of the insertion port.

[0014] Furthermore, a fire truck water intake sign is installed on one side of the protective well to improve the identification efficiency and ease of use of the water intake.

[0015] Furthermore, the interface pipe is equipped with a quick-opening valve, such as a butterfly valve, which can quickly open or close in a short time to improve water intake efficiency.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a fire water intake for a semi-underground fire water tank. It features an internally snap-fit ​​suction pipe interface for quick connection and disconnection between the interface pipe and the fire truck's own water intake pipe, improving water intake efficiency in emergencies. When the water level in the semi-underground fire water tank drops to the sealing plate, the fire truck's own water intake pipe connects to the fire truck's suction head, which is then immersed in the water in the riser to continue drawing water. The sealing plate prevents water above ground level from overflowing from the semi-underground fire water tank. It also reduces the number of bolts connecting the sealing plate to the flange, allowing for quick opening and water intake. A straight pipe connects to the outlet of the semi-underground fire water tank, and the riser connects to the straight pipe, ensuring that fire-fighting water from the semi-underground fire water tank flows to the intake, facilitating water intake for the fire truck. This utility model provides a fire water intake for a semi-underground fire water tank, taking into account the characteristics of such tanks to achieve rapid and safe water intake and improve fire-fighting efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a fire water intake for a semi-underground fire water tank according to the present invention.

[0019] Figure 2 This is a plan view of a fire water intake for a semi-underground fire water tank according to the present invention.

[0020] Figure 3 This is a schematic diagram showing the connection between the fire water intake and the fire water tank of this utility model.

[0021] Figure 4 This is a schematic diagram showing the connection between the fire water intake of this utility model and multiple fire water tanks.

[0022] Figure 5 This is a first-view structural diagram of the internally clipped water suction pipe interface.

[0023] Figure 6 This is a structural schematic diagram from a second perspective of the internally fastened water suction pipe interface.

[0024] Figure 7 This is a schematic diagram showing the connection of two internally clipped water suction pipe interfaces.

[0025] Figure 8 This is an internal diagram showing the connection between two internally clipped water suction pipe interfaces.

[0026] Figure 9 A diagram illustrating the process of drawing water for a fire truck. Figure 1 .

[0027] Figure 10 A diagram illustrating the process of drawing water for a fire truck. Figure 2 .

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Protective well, 2-Well cover, 3-Semi-underground fire water tank, 4-Straight pipe, 5-Riser, 6-Sealing plate, 7-Interface pipe, 8-Fire truck suction head

[0030] 9-Internal snap-fit ​​water suction pipe interface; 901-Inner pipe; 902-Outer sleeve; 9021-Coarse cylinder section; 9022-Fine cylinder section; 9023-Transition section; 903-Snap claw; 9031-Support section; 9032-Snap-fit ​​section; 904-Sealing ring; 905-Clamping strip; 9051-Abutment surface; 9052-Curved surface; 906-Socket.

[0031] 10-Sump, 11-Branch pipe, 12-Valve well, 13-Insulation layer, 14-Flange, 15-Suction port mark, 16-Quick-opening valve, 17-Fire truck's own water intake pipe. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-10 As shown, a fire water intake for a semi-underground fire water tank includes a protective well 1, a well cover 2 covering the opening of the protective well 1, and a straight pipe 4 connected to the outlet of the semi-underground fire water tank 3. One end of the straight pipe 4 away from the semi-underground fire water tank 3 is connected to a riser 5. The top end of the riser 5 extends into the protective well 1 and is detachably connected to a sealing plate 6. The sealing plate 6 has a through hole and is connected to an interface pipe 7. The interface pipe 7 is equipped with a valve, and the opening of the interface pipe 7 is equipped with an internally snapped suction pipe interface 9 for connecting to the fire truck's own water intake pipe 17.

[0034] The protective well 1 can be circular or square, and the diameter or side length (or length and width dimensions) of the well opening can be 800-1000mm. The depth of the protective well 1 can be 300-500mm. A horizontal step is formed on the upper part of the protective well 1 to support the well cover 2. The protective well 1 is 80-150mm above the ground to prevent ground water from flowing into the protective well 1. The well wall material of the protective well 1 can be reinforced concrete or concrete modules.

[0035] The top surface of the manhole cover 2 is preferably flush with the top surface of the well wall of the protective well 1. The manhole cover 2 is used to prevent foreign objects from entering the protective well 1. The manhole cover 2 is preferably a double-layer insulated manhole cover. Its size should be such that it completely covers the opening of the protective well 1 and forms a horizontal step with the upper part of the protective well 1.

[0036] One end of the straight pipe 4 is connected to the outlet of the sump 10 of the semi-underground fire water tank 3. The sump 10 is generally located at the bottom of one side of the semi-underground fire water tank 3. The other end is connected to the riser 5 via an elbow, such as a 90-degree elbow. The specifications of the straight pipe 4 and the riser 5 can be, for example, DN400. The straight pipe 4 and the riser 5 can be, for example, one of welded steel pipe, seamless steel pipe, or spiral welded steel pipe. Both the riser 5 and the straight pipe 4 are buried pipes.

[0037] The straight pipe 4 can branch into multiple branch pipes 11, each branch pipe 11 is connected to the sump 10 of a semi-underground fire water tank 3, which is suitable for the joint use of multiple semi-underground fire water tanks 3. Each branch pipe 11 is equipped with a valve well 12.

[0038] The portion of riser 5 near the port and interface pipe 7 are both wrapped with insulation layer 13 to prevent the water inside the pipe from freezing. The insulation layer 13 is provided with a protective layer. The thickness of insulation layer 13 can be, for example, 50-200mm. The insulation material can be, for example, rubber and plastic pipe shell or electric heating tape. The installation depth of insulation layer 13 is 300-500mm greater than the frost depth of the project site to enhance the antifreeze effect. The material of the protective layer can be, for example, stainless steel sheet.

[0039] The sealing plate 6 is a blind flange. Several first holes are arranged in a circular array near the periphery of the blind flange. For example, there can be 2-3 first holes. The sealing plate 6 is used to prevent water above the ground in the semi-underground fire water tank 3 from overflowing. The through hole is set in the center of the sealing plate 6.

[0040] The riser 5 has a flange 14 at its port that is connected to the sealing plate 6. The flange 14 has multiple second holes, the number and position of which correspond to the first holes. When the sealing plate 6 is connected to the flange 14, the position of the sealing plate 16 is adjusted so that the first and second holes are coaxial. After the bolt passes through the first and second holes, the nut is screwed in and tightened to achieve the connection between the flange 14 and the sealing plate 6.

[0041] The interface pipe 7 can be, for example, a short steel pipe, and its specification can be, for example, DN100.

[0042] The internally snap-fit ​​suction pipe interface 9, such as the KD100 type internally snap-fit ​​suction pipe interface, has a distance between itself and the well cover 2 of, for example, 100-300 mm, preferably about 200 mm. In one embodiment, the internally snap-fit ​​suction pipe interface 9 includes an inner pipe 901, an outer sleeve 902 sleeved on the outer wall of the inner pipe 901, a plurality of latches 903 fixed on the outer sleeve 902, a sealing ring 904 connected to the port of the inner pipe 901, and arc-shaped retaining strips 905 protruding inward from the outer sleeve 902 between adjacent latches 903. The outer sleeve 902 includes a coarse cylindrical portion 9021, a thin cylindrical portion 9022, and a connection between the coarse cylindrical portion 9021 and the thin cylindrical portion 9022. The transition section 9023 is an annular plate. The inner tube 901 is connected to the inner ring of the transition section 9023. The thin cylindrical section 9022 is connected between the inner and outer rings of the transition section 9023. The thick cylindrical section 9021 is connected to the outer ring of the transition section 9023. The thick cylindrical section 9021 and the inner tube 901 form an annular mating cavity. The end face of the inner tube 901 is flush with the end face of the thick cylindrical section 9021, for example. There can be 2-3 latches 903, which are arranged circumferentially around the outer sleeve 902. The evenly distributed latches 903 include a support portion 9031 extending axially from the inner wall of the coarse cylindrical portion 9021, and a snap-fit ​​portion 9032 protruding radially from the end of the support portion 9031 along the coarse cylindrical portion 9021. The sealing ring can be made of, for example, rubber. A snap-fit ​​strip 905 is connected to the inner wall of the coarse cylindrical portion 9021. The length of the snap-fit ​​strip 905 is less than the arc length between two adjacent latches 903, thereby forming a space between the latches 903 and the snap-fit ​​strip 905 for another latch 903 of the internal snap-fit ​​water suction pipe interface 9 to enter. The insertion port 906 of the docking cavity includes a retaining strip 905 with an abutment surface 9051 flush with the end face of the coarse cylindrical portion 9021 and a curved surface 9052 connecting the abutment surface 9051 and the inner surface of the coarse cylindrical portion 9021. The cross section of the retaining strip 905 along the radial direction of the coarse cylindrical portion 9021 is wedge-shaped. The thickness of the retaining strip 905 is greater than the length of the support portion 9031 to ensure that the end faces of the coarse cylindrical portions 9021 of the two interlocking water suction pipe interfaces 9 coincide. At the same time, the sealing ring 904 is compressed to achieve the purpose of sealing and prevent leakage of fire water.In practical application, the fire truck's own water intake pipe 17 is connected to an internally clipped suction pipe interface. This internally clipped suction pipe interface is designated as the first internally clipped suction pipe interface (the internal pipe of the fire truck's own water intake pipe is connected to the first internally clipped suction pipe interface). The internally clipped suction pipe interface connected to the interface pipe 7 is designated as the second internally clipped suction pipe interface (the interface pipe is connected to the internal pipe of the second internally clipped suction pipe interface). The first and second internally clipped suction pipe interfaces are compatible. When the fire truck's own water intake pipe 17 needs to be connected to the interface pipe 7, the two internally clipped suction pipe interfaces... The latches 903 of the snap-on water suction pipe interface enter each other's mating chambers through the socket 906. Rotating the first inner snap-on water suction pipe interface causes the snap-fit ​​part of the first inner snap-on water suction pipe interface to abut against the curved surface of the second inner snap-on water suction pipe interface. At the same time, the two sealing rings are compressed to ensure the sealing of the mating position of the two inner pipes, realizing the quick connection between the fire truck's own water intake pipe 17 and the interface pipe 7, improving the water intake efficiency in emergency situations. When it is necessary to disconnect, rotate the first inner snap-on water suction pipe interface in the opposite direction to pull out the snap-fit ​​part 9032 of the first inner snap-on water suction pipe interface from the socket 906.

[0043] A fire truck water intake sign 15 is installed on one side of the protective well 1 to improve the identification efficiency and ease of use of the water intake.

[0044] The interface pipe 7 is equipped with a quick-opening valve 16, which can be, for example, a butterfly valve, to quickly open or close in a short time, thereby improving water intake efficiency.

[0045] After rust removal, straight pipe 4, riser pipe 5, sealing plate 6, flange 14, and interface pipe 7 are successively coated with red lead anti-rust paint and hot asphalt to extend their service life.

[0046] The semi-underground fire water tank 3 stores all the fire water during the duration of a fire and is equipped with a local remote monitoring level gauge to determine whether the water level in the tank is above or below the ground. The height of the water level in the semi-underground fire water tank 3 relative to the ground is generally 2-4m. Example

[0047] like Figure 9 , Figure 10As shown, when a fire occurs, firefighters open the manhole cover 2 according to the water intake sign 15, connect the fire truck's own water intake pipe 17 to the interface pipe 7, and open the quick-opening valve 16 to draw water. In the initial stage of use, the water level of the semi-underground fire water tank 3 is higher than the ground. As the amount of water stored in the semi-underground fire water tank 3 decreases, when the water level of the semi-underground fire water tank 3 drops to the height of the sealing plate 6, the fire truck cannot draw water through the interface pipe 7. At this time, the fire truck's own water intake pipe 17 is disconnected from the interface pipe 7, then the nut is loosened, the bolt is removed, the sealing plate 6 is opened, and then the fire truck's water intake head 8 is connected to the fire truck's own water intake pipe 17 through the internal buckle water intake pipe interface (the fire truck's water intake head 8 is a separate fire truck-mounted facility that can be directly put into the water for use, and one end of the fire truck's water intake head 8 is also equipped with an internal buckle water intake pipe interface) and put into the riser pipe 5 to continue drawing water.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A fire service intake for a semi-underground fire water reservoir, characterized in that, It includes protective well (1), cover the wellhead of protective well (1) well lid (2), and straight pipe (4) with half underground fire pool (3) water outlet connection, straight pipe (4) far away from half underground fire pool (3) one end of vertical pipe (5) and vertical pipe (5) top port extends to protective well (1) and with seal plate (6) detachable connection, seal plate (6) on the through hole and with interface pipe (7) connection, interface pipe is equipped with valve, interface pipe (7) pipe mouth is equipped with for with fire engine take water pipe (17) connection inner buckle type water suction pipe interface (9).

2. The fire service connection of claim 1, wherein, Protective well (1) is circular or square, the upper portion of protective well (1) forms water platform level for supporting well lid (2), the top surface of well lid (2) is flush with the top surface of well wall of protective well (1).

3. A fire water intake according to claim 1 or 2, characterised in that, Straight pipe (4) one end and half underground fire pool (3) water collecting pit (10) water outlet connection, the other end is connected with vertical pipe (5) through 90 degree elbow, vertical pipe (5) and straight pipe (4) are all buried pipeline.

4. The fire service connection of claim 3, wherein, Straight pipe (4) divides multiple branch pipes (11), each branch pipe (11) is connected with a water collecting pit (10) of half underground fire pool (3), and each branch pipe (11) is provided with valve well (12).

5. The fire service connection of claim 3, wherein, The part of vertical pipe (5) near port, interface pipe (7) are all wrapped with thermal insulation layer (13), and the outer part of thermal insulation layer (13) is provided with protective layer.

6. The fire service connection of claim 1, wherein, The seal plate (6) is blind flange, the first eyelet is arranged in the circumferential array at the position close to the circumference of blind flange, and the through hole is arranged at the center of seal plate (6).

7. The fire service connection of claim 6, wherein, The port of vertical pipe (5) is provided with flange plate (14) connected with seal plate (6), and the second eyelet is arranged on flange plate (14), and the number and position of second eyelet correspond to first eyelet respectively.

8. The fire service connection of claim 1, wherein, The inner buckle type water suction pipe interface (9) comprises an inner connector pipe (901), an outer sleeve (902) surrounding the inner connector pipe (901), a plurality of buckle claws (903) fixed on the outer sleeve (902), a sealing ring (904) connected to the port of the inner connector pipe (901), and an arc-shaped clamping strip (905) arranged on the outer sleeve (902) between adjacent buckle claws (903) and protruding towards the inside of the outer sleeve (902). The outer sleeve (902) comprises a thick cylinder portion (9021), a thin cylinder portion (9022) and a transition portion (9023) connected between the thick cylinder portion (9021) and the thin cylinder portion (9022). The transition portion (9023) is an annular plate, the inner connector pipe (901) is connected to the inner ring of the transition portion (9023), the thin cylinder portion (9022) is connected between the inner ring and the outer ring of the transition portion (9023), and the thick cylinder portion (9021) is connected to the outer ring of the transition portion (9023). The thick cylinder portion (9021) and the inner connector pipe (901) form an annular butt joint cavity, the end surface of the inner connector pipe (901) is flush with the end surface of the thick cylinder portion (9021), the plurality of buckle claws (903) are uniformly distributed along the circumference of the outer sleeve (902), the buckle claw (903) comprises a support portion (9031) protruding from the inner wall of the thick cylinder portion (9021) in the axial direction, a clamping portion (9032) protruding from the end portion of the support portion (9031) in the radial direction of the thick cylinder portion (9021), the clamping strip (905) is connected to the inner wall of the thick cylinder portion (9021), the length of the clamping strip (905) is less than the arc length between two adjacent buckle claws (903), thereby forming a socket (906) for the buckle claw (903) of another inner buckle type water suction pipe interface (9) to enter the butt joint cavity between the buckle claw (903) and the clamping strip (905), the clamping strip (905) comprises an abutting surface (9051) flush with the end surface of the thick cylinder portion (9021) and a curved surface (9052) connecting the abutting surface (9051) and the inner surface of the thick cylinder portion (9021), and the cross section of the clamping strip (905) in the radial direction of the thick cylinder portion (9021) is wedge-shaped.

9. The fire service connection of claim 1, wherein, A fire truck water suction port sign (15) is arranged on one side of the protective well (1).

10. The fire service connection of claim 1, wherein, The interface pipe (7) is provided with a quick-opening valve (16).

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