A fire pump anti-gas accumulation connection pipe

Abstract

This utility model relates to the field of building water supply, drainage and fire protection design technology, and discloses a fire pump anti-air accumulation connection pipeline. Its features include a fire pump, a fire water tank, a main suction pipe, a branch suction pipe, and an eccentric reducing tee. The eccentric reducing tee includes a main tee and a branch tee, with their inner tops flush. One end of the main suction pipe is located in the fire water tank, and the other end is connected to the main tee. The other end of the main tee is connected to an external pipe network. The branch suction pipe is connected to the branch tee, and the other end is connected to the inlet of the fire pump. A quick-connect fitting is provided at the end of the branch suction pipe connected to the fire pump, and a quick-connect secondary pipe is provided at the inlet of the fire pump. This utility model effectively prevents water pocket formation in the pipeline and allows for quick connection between the water pipe and the pump.

Description

Technical Field

[0001] This utility model relates to the field of building water supply, drainage and fire protection design technology, and in particular to a fire pump anti-air accumulation connection pipeline. Background Technology

[0002] In the field of building water supply, drainage, and fire protection design, the arrangement of fire pump suction pipes should avoid forming air pockets. Air pockets in the suction pipe reduce the flow area, decreasing water flow and consequently reducing the amount of water needed for firefighting. When the design uses a main suction pipe, the diameter of the suction pipe for each pump is generally smaller than the main suction pipe diameter, requiring attention to the aforementioned requirements at the connection point. Using traditional tee joints, installing branch pipes at an upward angle can avoid air pocket formation, but this raises the pump installation height, potentially increasing the minimum effective liquid level in the fire water tank and reducing its utilization rate. Directly using horizontal tee joints leads to air accumulation in the main suction pipe, reducing fire water intake flow and violating regulations. This requires installing automatic air vents on each main pipe, but their venting effect is generally poor and increases costs. Both of these conventional technical measures have certain drawbacks.

[0003] In addition, when connecting the fire pump to the suction pipe, the traditional method is to use a flange. When connecting with a flange, multiple bolts are needed for fixing, and the pipeline connection takes a long time.

[0004] To solve the above problems, a new fire pump pipeline connection structure is needed. Utility Model Content

[0005] The purpose of this utility model is to provide a fire pump anti-air accumulation connection pipeline, which can prevent the formation of water pockets in the pipeline and can quickly connect the water pipe and the water pump.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A fire pump anti-air accumulation connection pipeline includes a fire pump, a fire water tank, a main suction pipe, a branch suction pipe, and an eccentric reducing tee. The eccentric reducing tee includes a main tee and a branch tee, with their inner tops flush. One end of the main suction pipe is located in the fire water tank, and the other end is connected to the main tee. The other end of the main tee is connected to an external pipe network. The branch suction pipe is connected to the branch tee, and the other end of the branch suction pipe is connected to the inlet of the fire pump. A quick-connect fitting is provided at the end of the branch suction pipe connected to the fire pump, and a quick-connect secondary pipe is provided at the inlet of the fire pump.

[0007] As a further feature of this invention, the diameter of the main tee pipe matches the diameter of the main suction pipe, and the diameter of the branch tee pipe matches the diameter of the branch suction pipe.

[0008] As a further feature of this utility model, the quick connector includes a cylindrical tube fixedly connected to the water suction branch pipe, a connecting pipe coaxially connected to the outside of the cylindrical tube, the outer diameter of the quick connector secondary tube being equal to the outer diameter of the cylindrical tube, an internal thread being provided on the inner wall of the end of the connecting pipe near the quick connector secondary tube, and external threads being provided on the outer walls of the cylindrical tube and the quick connector secondary tube, and the connecting pipe being threadedly connected to the cylindrical tube and the quick connector secondary tube.

[0009] As a further feature of this invention, a limiting rod is provided radially on the outer side of the end of the connecting pipe near the quick-connect sub-pipe. The limiting rod is slidably connected to the connecting pipe. A limiting hole is provided on the outer wall of the quick-connect sub-pipe. The limiting hole is not connected to the pipe of the quick-connect sub-pipe. When the connecting pipe is rotated to the designated position on the quick-connect sub-pipe, the limiting rod is engaged in the limiting hole.

[0010] As a further feature of this invention, multiple limiting rods are provided along the circumference of the connecting pipe, and the number and position of the limiting holes match the limiting rods.

[0011] As a further feature of this utility model, an elastic element is provided on the limiting rod, one end of which is fixedly connected to the connecting pipe and the other end is fixedly connected to the limiting rod.

[0012] As a further feature of this invention, the connecting pipe extends outward from one end edge near the quick-connect sub-pipe to form a first support portion. The outer edge of the first support portion extends axially from the connecting pipe and away from the quick-connect sub-pipe to form a second support portion. An installation gap is provided between the second support portion and the outer wall of the connecting pipe. A notch is provided on the second support portion at a position matching the limiting rod. A connecting block is slidably disposed at the notch. The connecting block is fixedly connected to the limiting rod. A pushing member is provided on the connecting pipe to push the connecting block to move axially along the limiting rod.

[0013] As a further feature of this invention, the pushing member includes a pushing block that is slidably connected to the connecting pipe, the second support portion and the connecting block are provided with a first wedge-shaped inclined surface, the pushing block is provided with a second wedge-shaped inclined surface on the side near the second support portion, and the first wedge-shaped inclined surface matches the second wedge-shaped inclined surface.

[0014] The beneficial effects of this utility model are: 1. This utility model connects the main suction pipe and the branch suction pipe using an eccentric reducing tee. In the eccentric reducing tee, the inner tops of the main tee and the branch tee are flush. When the main suction pipe and the branch tee are connected, the inner tops of the main suction pipe and the branch tee are flush. Compared with existing concentric reducing tees, this installation method allows air in the main suction pipe to be discharged into the pipe network in a timely manner along the water flow direction, and finally discharged smoothly through the automatic air vent valve at the top of the pipe network. This simply solves the problem of air pockets that may form in the main suction pipe and the branch suction pipe. At the same time, it avoids a series of adverse factors that may occur due to solving the air pocket problem, such as raising the pump foundation, raising the minimum effective water level, and increasing the number of pipe fittings. While ensuring the fire water supply capacity, it also effectively controls the construction cost of the fire pump room and water tank.

[0015] 2. In this utility model, quick-connect couplings are used to connect the fire pump and the suction branch pipe, which makes the connection faster and more convenient during installation and subsequent maintenance, saving connection time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a front view of the eccentric reducing tee connector in this embodiment; Figure 3 This is a side view of the eccentric reducing tee connector in this embodiment; Figure 4 This is a top view of the eccentric reducing tee connector in this embodiment; Figure 5 This is a schematic diagram of the overall structure of the quick connector in this embodiment; Figure 6 This is a schematic diagram of the cross-sectional structure of the quick connector in this embodiment; Figure 7 This is a schematic diagram of the connecting pipe and its structure in this embodiment; In the diagram, 1. Fire pump, 2. Fire water tank, 3. Suction main pipe, 4. Suction branch pipe, 5. Eccentric reducing tee, 51. Main tee, 52. Branch tee, 6. Quick connector, 61. Cylindrical pipe, 62. Connecting pipe, 63. Limiting rod, 64. Elastic element, 65. First support part, 66. Second support part, 67. Connecting block, 68. Pushing block, 69. First wedge-shaped inclined surface, 610. Second wedge-shaped inclined surface, 7. Quick connector secondary pipe, 71. Limiting hole. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] A fire pump with 62 anti-air accumulation connecting pipes, referenced. Figures 1 to 7 The system includes a fire pump 1, a fire water tank 2, a main suction pipe 3, a branch suction pipe 4, and an eccentric reducing tee connector 5. The fire pump 1 is located inside the fire room, and the fire water tank 2 is located outside the fire pump 1. Water from the fire water tank 2 is introduced into the fire room through the main suction pipe 3. One end of the main suction pipe 3 is located in the fire water tank 2, and the other end extends into the fire room. The end located inside the fire room is connected to the eccentric reducing tee connector 5. The eccentric reducing tee connector 5 has a tee main pipe 51 and a tee branch pipe 52. 51 has two interfaces. One end of the tee branch pipe 52 is connected to the middle of the tee main pipe 51, and the internal channels are connected. The other end forms an interface. One interface of the tee main pipe 51 of the eccentric reducing tee connector 5 is connected to the water intake main pipe 3, and one interface of the tee branch pipe 52 is connected to the water intake branch pipe 4. The other interface of the tee main pipe 51 is connected to other pipe networks. There are multiple water pumps and other water intake pipes in the fire room. Multiple water intake pipes can be connected together to form a pipe network through the eccentric reducing tee connector 5.

[0020] The tee main pipe 51 of the eccentric reducing tee connector 5 matches the diameter of the suction header 3, and the tee branch pipe 52 matches the diameter of the suction branch pipe 4. The inner tops of the tee main pipe 51 and the tee branch pipe 52 are flush. The eccentricity of the axis of the eccentric reducing tee connector 5 is R1-R2, where the radius of the tee main pipe 51 is R1 and the radius of the tee branch pipe 52 is R2. With this setting, the inner tops of the suction header 3 and the suction branch pipe 4 are flush. When the water flows through the suction header 3 and the suction branch pipe 4, the air in the suction header 3 can be discharged into the pipe network in a timely manner along the direction of water flow. Finally, it can be discharged smoothly through the automatic air vent valve at the top of the pipe network, without accumulating in the suction pipe to form a water pocket, thus reducing the overflow of water in the suction pipe.

[0021] By using the eccentric reducing tee connector 5, the potential formation of air pockets in the main suction pipe 3 and the branch suction pipe 4 is easily resolved. This also avoids a series of adverse factors that could arise from resolving the air pocket issue, such as raising the pump foundation, raising the minimum effective water level, and requiring additional pipe fittings. This ensures fire-fighting water supply capacity while effectively controlling the construction costs of the fire pump room and water tank.

[0022] Furthermore, to facilitate the connection between the suction branch pipe 4 and the fire pump 1, a quick connector 6 is provided at the end of the suction branch pipe 4 near the fire pump 1, and a quick-connect secondary pipe 7 is provided at the inlet of the fire pump 1. During installation, the quick connector 6 and the quick-connect secondary pipe 7 can be directly connected to complete the installation of the suction branch pipe 4 and the fire pump 1, which is convenient and quick, and saves more time and effort compared to the installation of the flange.

[0023] Specifically, the quick connector 6 includes a cylindrical tube 61 fixedly connected to the water suction branch pipe 4, and a quick connector secondary pipe 7 which is a cylindrical structure that matches the cylindrical tube 61. A connecting pipe 62 is coaxially connected to the outside of the cylindrical tube 61. The outer diameter of the quick connector secondary pipe 7 is equal to the outer diameter of the cylindrical tube 61, so that the connecting pipe 62 can connect the cylindrical tube 61 and the quick connector secondary pipe 7. The connection method is that an internal thread is provided on the inner wall of the connecting pipe 62, and an external thread is provided on the outer wall of the cylindrical tube 61 and the quick connector secondary pipe 7. The connecting pipe 62 is threadedly connected to the cylindrical tube 61 and the quick connector secondary pipe 7.

[0024] During connection, first bring the traction cylindrical tube 61 close to the quick-connect secondary tube 7 and align it. Then rotate the connecting tube 62, and the connecting tube 62 will continuously approach the quick-connect secondary tube 7 and connect with it through the external thread on the quick-connect secondary tube 7, thereby connecting the cylindrical tube 61 and the quick-connect secondary tube 7. In order to have a better sealing performance, sealing rings can be set at the opposite ends of the cylindrical tube 61 and the quick-connect secondary tube 7 for sealing.

[0025] A single threaded connection may loosen during use. To ensure connection stability, a limiting rod 63 is radially provided on the outer side of the connecting pipe 62 near the quick-connect secondary pipe 7, and a limiting hole 71 is provided on the quick-connect secondary pipe 7. When the connecting pipe 62 rotates to the designated position, the limiting rod 63 will engage with the limiting hole 71, thus preventing axial movement of the connecting pipe 62 and making the connection more stable. The limiting hole 71 is not connected to the quick-connect secondary pipe 7, avoiding the creation of new channels and eliminating the need to consider sealing issues. Multiple limiting holes 71 and limiting rods 63 can be provided; in this embodiment, five are provided. The cooperation of multiple limiting rods 63 and limiting holes 71 ensures connection stability even if one fails.

[0026] A first support portion 65 extends outward from the edge of the connecting pipe 62 near the quick-connect sub-pipe 7. The outer edge of the first support portion 65 extends along the axial direction of the connecting pipe 62 and away from the quick-connect sub-pipe 7 to form a second support portion 66. An installation gap is provided between the second support portion 66 and the outer wall of the connecting pipe 62. A notch is provided on the second support portion 66 at a position that matches a plurality of limiting rods 63. A connecting block 67 is slidably provided at the notch. The limiting rods 63 are fixedly connected to the connecting block 67. An elastic element 64 is provided on the limiting rod 63. The elastic element 64 is specifically a connecting spring. The connecting spring is located in the installation gap and is fixedly connected at one end to the connecting pipe 62 and at the other end to the limiting rod 63. A pushing block 68 is also slidably connected to the connecting pipe 62. A first wedge-shaped inclined surface 69 is provided on the second support portion 66 and the connecting block 67. A second wedge-shaped inclined surface 610 is provided on the side of the pushing block 68 near the second support portion 66. The first wedge-shaped inclined surface 69 and the second wedge-shaped inclined surface 610 match.

[0027] In other embodiments, the elastic element 64 may be other structures, depending on the desired technical effect.

[0028] The working principle of the quick connector 6 is as follows: by rotating the connecting pipe 62, the connecting pipe 62 and the quick connector secondary pipe 7 are threaded together. The cylindrical pipe 61 is always threadedly connected to the connecting pipe 62. When the connecting pipe 62 and the quick connector secondary pipe 7 are threaded together, the connecting pipe 62 connects the cylindrical pipe 61 and the quick connector secondary pipe 7. When the cylindrical pipe 61 rotates to the designated position, the limiting rod 63 moves into the limiting hole 71. Before this, the pushing block 68 is pushed away from the second support part 66, so that the first wedge-shaped inclined surface 69 and the second wedge-shaped inclined surface 610 are completely separated. Under the action of the support spring, the limiting rod 63 has a tendency to move radially. At this time, the bottom end of the limiting rod 63 abuts against the outer wall of the quick connector secondary pipe 7. When the cylindrical pipe 61 rotates to the designated position, the limiting rod 63 moves into the limiting hole 71. Under the action of the support spring, the limiting rod 63 is directly inserted into the limiting hole 71. When it is necessary to separate the suction branch pipe 4 and the fire pump 1, push the push block 68 close to the second support part 66. The first wedge-shaped inclined surface 69 abuts against the second wedge-shaped inclined surface 610. Then, push the push block 68 pushes the connecting block 67 to rise. The connecting block 67 drives the limit rod 63 to rise and finally makes the limit rod 63 disengage from the limit hole 71. Then, rotate the connecting pipe 62 in the opposite direction to the installation to separate the connecting pipe 62 from the quick-connect secondary pipe 7, thereby completing the separation of the suction branch pipe 4 and the fire pump 1, which is very convenient.

[0029] Other devices that can ensure better operation of the pipeline are also installed on the water intake branch pipe 4, such as valves for convenient control of pipeline opening and closing, pressure gauges for recording pipeline pressure, and rubber joints for reasonable vibration damping of fire pump 1, etc. These are all conventional settings for those skilled in the art, and will not be described in detail here. This technical solution mainly points out the relevant structures for solving the problems in the background art.

[0030] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire pump anti-air accumulation connection pipeline, characterized in that, The system includes a fire pump (1), a fire water tank (2), a main suction pipe (3), a branch suction pipe (4), and an eccentric reducing tee joint (5). The eccentric reducing tee joint (5) includes a main tee pipe (51) and a branch tee pipe (52). The top of the main tee pipe (51) and the branch tee pipe (52) are connected flat. One end of the main suction pipe (3) is placed in the fire water tank (2), and the other end is connected to the main tee pipe (51). The other end of the main tee pipe (51) is connected to the external pipe network. The branch suction pipe (4) is connected to the branch tee pipe (52). The other end of the branch suction pipe (4) is connected to the inlet of the fire pump (1). The end of the branch suction pipe (4) connected to the fire pump (1) is provided with a quick connector (6). The inlet of the fire pump (1) is provided with a quick-connect secondary pipe (7).

2. The fire pump anti-air accumulation connection pipeline according to claim 1, characterized in that, The diameter of the tee main pipe (51) matches the diameter of the water intake main pipe (3), and the diameter of the tee branch pipe (52) matches the diameter of the water intake branch pipe (4).

3. The fire pump anti-air accumulation connection pipeline according to claim 1, characterized in that, The quick connector (6) includes a cylindrical tube (61) fixedly connected to the water suction branch pipe (4). A connecting pipe (62) is coaxially connected to the outside of the cylindrical tube (61). The outer diameter of the quick connector secondary pipe (7) is equal to the outer diameter of the cylindrical tube (61). The inner wall of the connecting pipe (62) near the quick connector secondary pipe (7) is provided with an internal thread. The outer walls of the cylindrical tube (61) and the quick connector secondary pipe (7) are provided with external threads. The connecting pipe (62) is threadedly connected to the cylindrical tube (61) and the quick connector secondary pipe (7).

4. A fire pump anti-air accumulation connection pipeline according to claim 3, characterized in that, A limiting rod (63) is provided on the outer side of the end of the connecting pipe (62) near the quick-connect sub-pipe (7) along the radial direction of the connecting pipe (62). The limiting rod (63) is slidably connected to the connecting pipe. A limiting hole (71) is provided on the outer wall of the quick-connect sub-pipe (7). The limiting hole (71) is not connected to the pipeline of the quick-connect sub-pipe (7). When the connecting pipe (62) is rotated to the designated position on the quick-connect sub-pipe (7), the limiting rod (63) is inserted into the limiting hole (71).

5. A fire pump anti-air accumulation connection pipeline according to claim 4, characterized in that, The limiting rod (63) is provided with multiple rods along the circumference of the connecting pipe (62), and the number and position of the limiting holes (71) match the limiting rod (63).

6. A fire pump anti-air accumulation connection pipeline according to claim 5, characterized in that, An elastic element (64) is provided on the limiting rod (63). One end of the elastic element (64) is fixedly connected to the connecting pipe (62), and the other end is fixedly connected to the limiting rod (63).

7. A fire pump anti-air accumulation connection pipeline according to claim 6, characterized in that, The connecting pipe (62) extends outward from one end edge near the quick-connect sub-pipe (7) to form a first support part (65). The outer edge of the first support part (65) extends axially from the connecting pipe (62) and away from the quick-connect sub-pipe (7) to form a second support part (66). An installation gap is provided between the second support part (66) and the outer wall of the connecting pipe (62). A notch is provided on the second support part (66) at a position that matches the limiting rod (63). A connecting block (67) is slidably provided at the notch. The connecting block (67) is fixedly connected to the limiting rod (63). A pusher is provided on the connecting pipe (62) to push the connecting block (67) to move axially along the limiting rod (63).

8. A fire pump anti-air accumulation connection pipeline according to claim 7, characterized in that, The pusher includes a push block (68) that is slidably connected to the connecting pipe (62). The second support (66) and the connecting block (67) are provided with a first wedge-shaped inclined surface (69). The push block (68) is provided with a second wedge-shaped inclined surface (610) on the side near the second support (66). The first wedge-shaped inclined surface (69) matches the second wedge-shaped inclined surface (610).

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