A connection structure and method for fire service piping

Abstract

The application relates to the technical field of fire-fighting pipe network connection, in particular to a connection structure and method for fire-fighting pipe network, which are completed by cooperation of the connection structure, and the connection structure comprises a connecting assembly and an auxiliary installation assembly. The connecting assembly comprises an eccentric reducer pipe, a sealing ring and a clamp. The auxiliary installation assembly comprises a support frame, a fixed butt joint assembly and a movable butt joint assembly arranged on the support frame. The fixed butt joint assembly comprises a limiting unit for clamping and positioning a water pump inlet and an installation unit for assisting in installation of the sealing ring; the movable butt joint assembly is used for supporting the eccentric reducer pipe and assisting in installation of the eccentric reducer pipe through gravity self-leveling and fixed-angle overturning. The application has the advantages that the application realizes efficient and high-precision pipe top leveling through gravity self-leveling and overturning, lubrication channels are combined to ensure smooth installation of the sealing ring, the auxiliary installation assembly can be recycled and reused, and the installation quality, efficiency and economy are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of fire protection pipeline connection technology, and in particular to a connection structure and method for fire protection pipelines. Background Technology

[0002] In fire protection pipeline engineering, the connection between the water pump inlet and the fire protection pipeline is a crucial link to ensure the reliable operation of the fire protection water supply system. According to national standards, when the diameter of the water pump inlet and the inlet pipeline are inconsistent and a diameter reduction connection is required, an eccentric reducer must be used, and the installation requirement of "top-flat connection" (also known as "top-flat installation") must be strictly followed.

[0003] The term "top-level connection" refers to the installation process where the top edge (top of the pipe) of the eccentric reducer is at the same horizontal level, with the flat top side directly above and the sloping bottom side directly below. This requirement aims to eliminate the protruding area at the top of the pipe, preventing gas from escaping in the water flow from accumulating and forming air pockets, thus preventing cavitation damage to the water pump and ensuring that the fire pump can reliably start and operate normally during a fire.

[0004] However, in actual construction, the "top-side connection" installation of eccentric reducers mainly relies on manual operation. The traditional method is as follows: installers first preliminarily connect the eccentric reducer to the water pump inlet, then repeatedly adjust the angle of the reducer using a spirit level or string line until its upper edge is horizontal, and finally tighten the connector. This process is cumbersome and inefficient, especially in large-scale, repetitive installations, and is time-consuming. Furthermore, installation accuracy is highly dependent on the operator's skill and experience, resulting in significant human error and making it difficult to guarantee consistency among different workers.

[0005] Furthermore, at the connection between the eccentric reducer and the water pump inlet, a sealing ring needs to be installed and secured with clamps to achieve a seal. In current construction, the sealing ring is typically installed manually: first, the sealing ring is placed on the end of the pipe, and then it is pushed into the sealing groove. Due to the significant frictional resistance between the sealing ring and the pipe, the sealing ring is prone to twisting, shifting, or even being installed backwards during manual removal, leading to seal failure and requiring rework.

[0006] Therefore, in order to improve the efficiency and reliability of installation, this invention provides a connection structure and method for fire protection pipe networks. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art by proposing a connection structure and method for fire protection pipe networks.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a connection structure for fire protection pipe network, used to connect the water pump inlet and the fire protection pipe, comprising: a connection component and an auxiliary installation component.

[0009] The connection assembly includes an eccentric reducing pipe, the larger diameter port of which is used to connect to the fire-fighting pipeline, and the smaller diameter port of which is used to connect to the water pump inlet.

[0010] A sealing ring is placed around the connection between the eccentric reducer and the water pump inlet.

[0011] The clamp is fastened to the outer circumference of the sealing ring.

[0012] The auxiliary installation component is detachably installed on the water pump inlet to assist in installation and can be removed after installation; the auxiliary installation component includes a support frame and a fixed docking component and a movable docking component disposed on the support frame.

[0013] The fixed docking assembly includes a limiting unit for clamping and positioning the water pump inlet and an installation unit for assisting in the installation of the sealing ring; the movable docking assembly is used to support the eccentric reducer and assists in the installation of the eccentric reducer by gravity self-leveling and fixed angle flipping.

[0014] In the above-mentioned connection structure for fire protection pipeline, the limiting unit includes an upper limiting member and a lower limiting member symmetrically distributed in the vertical direction, as well as an electric actuator that drives the relative movement of the two; both the upper limiting member and the lower limiting member are provided with wedge-shaped positioning surfaces for forming a close fit with the outer wall of the water pump inlet for limiting.

[0015] In the above-mentioned connection structure for fire protection pipe network, the installation unit includes two arc-shaped brackets disposed on the limiting unit. The two arc-shaped brackets are symmetrically distributed in the vertical direction and can be slidably connected to the right side wall of the upper limiting member and the lower limiting member in the axial direction.

[0016] In the above-mentioned connection structure for fire protection pipe network, two arc-shaped brackets together form an annular support surface for supporting the sealing ring; multiple lubricant channels are opened inside the arc-shaped brackets, and lubricant outlets communicating with the corresponding lubricant channels are opened on its support surface.

[0017] In the aforementioned connection structure for fire protection pipe networks, the movable docking assembly includes a support ring, a rotating bushing, a replacement bushing, and a locking assembly. The support ring is slidably mounted on the support frame in the horizontal direction via a movable seat.

[0018] In the aforementioned connection structure for fire protection pipe networks, the rotating bushing is circumferentially rotatable and installed inside the support ring, and the replacement bushing is detachably installed inside the rotating bushing and circumferentially rotatable relative to the rotating bushing.

[0019] In the above-mentioned connection structure for fire protection pipe network, an operating handle is fixedly provided on the side wall of the rotating bushing, and an arc-shaped guide groove is provided on the support ring for the operating handle to pass through, with the central angle of the arc-shaped guide groove being 180 degrees.

[0020] In the above-mentioned connection structure for fire protection pipe network, the locking component is disposed on the rotating bushing. The locking component includes multiple locking blocks evenly distributed in the circumferential direction, a linkage ring connecting the multiple locking blocks, and an electric push rod that drives the linkage ring to move axially. The locking blocks slide through the right side wall of the rotating bushing, and an elastic pad layer for increasing the friction coefficient is provided on the side facing the replacement bushing.

[0021] In the aforementioned connection structure for fire protection pipe networks, the support frame is a height-adjustable structure used to provide bottom support according to the posture of the fixed docking components after clamping.

[0022] As a preferred technical solution of the present invention, the present invention also provides a connection method for fire protection pipe network, which is completed by using the above-mentioned connection structure for fire protection pipe network, specifically including the following steps: S1, clamping, positioning and pre-installation: clamping and limiting the outer wall of the water pump inlet by the fixed docking component; and installing the sealing ring on the fixed docking component; the large diameter port of the eccentric reducing pipe is installed on the movable docking component.

[0023] S2. Gravity self-leveling: Under the action of gravity, the eccentric reducer automatically rotates until the overall center of gravity of the eccentric reducer is at its lowest position, at which point it is in the "pipe bottom flat connection" state.

[0024] S3, Fixed Angle Flip: The position of the eccentric reducer is locked by the locking component, and the eccentric reducer is flipped 180 degrees to the "pipe top flat connection" state.

[0025] S4. Assembly and fastening: Move the eccentric reducing pipe axially so that its smaller diameter port aligns with the water pump inlet; push the sealing ring down to the mating point and install clamps around the outer circumference of the sealing ring for fastening.

[0026] S5. Remove fixture: Release and remove the auxiliary installation fixture to complete the connection.

[0027] Compared with existing technologies, the advantages of this invention are as follows: This invention achieves efficient and high-precision pipe top flat connection through gravity self-leveling and rapid flipping, combined with lubrication channels to ensure smooth installation of the sealing ring, and the auxiliary installation components can be recycled and reused, significantly improving installation quality, efficiency and economy.

[0028] 1. This invention utilizes the physical characteristic of the eccentric reducer's center of gravity being biased towards the thick-walled side (flat-top side). By replacing the gap fit between the bushing and the rotating bushing, the eccentric reducer automatically rotates to its lowest position under gravity. Then, by operating the handle and the arc-shaped guide groove, it is rotated 180 degrees, turning the flat-top side from directly below to directly above, thus completing the "pipe top flat connection" installation. This process eliminates the need for manual leveling using measuring tools such as spirit levels, thus eliminating human error and ensuring high installation accuracy and consistency. Furthermore, the operation steps are simplified to "clamping, rotating, locking, flipping, and connecting," significantly improving installation efficiency, making it particularly suitable for large-scale, repetitive fire-fighting pipeline installation operations.

[0029] 2. This invention features multiple circumferentially evenly distributed lubricant channels inside the arc-shaped bracket, and corresponding lubricant outlets on the support surface. This design ensures that the sealing ring maintains lubrication on its inner surface throughout the removal process, significantly reducing frictional resistance and preventing the sealing ring from getting stuck, twisting, or shifting due to dry friction, thus ensuring that the sealing ring can accurately and smoothly fall into the sealing groove.

[0030] 3. The auxiliary installation components of this invention (including a support frame, a fixed docking assembly, and a movable docking assembly) can be removed as a whole after a single installation and reused for the next installation task of an eccentric reducer. Furthermore, the replacement bushing enhances the versatility and adaptability of the device. The above design reduces the cost of construction tools and has good economic efficiency. Attached Figure Description

[0031] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of the overall structure;

[0033] Figure 2 This is a schematic diagram of the structure after the water pump inlet is connected to the connecting assembly;

[0034] Figure 3 This is a cross-sectional view of the water pump inlet after it has been connected to the connecting assembly.

[0035] Figure 4 This is a structural diagram showing the water pump inlet, connecting components, and auxiliary installation components in a "pipe bottom flat connection" state.

[0036] Figure 5 This is a structural diagram showing the water pump inlet, connecting components, and auxiliary installation components in a "pipe top flat connection" state.

[0037] Figure 6 A partial structural exploded view of the water pump inlet and connecting components;

[0038] Figure 7A cross-sectional view of the arc-shaped bracket and lubricant channel;

[0039] Figure 8 This is a structural breakdown diagram of the activity docking components;

[0040] Figure 9 for Figure 8 A diagram from another perspective;

[0041] Figure 10 This is a cross-sectional view of the structure of an eccentric reducer installed on a replacement bushing.

[0042] In the diagram: 100, water pump inlet; 201, eccentric reducer; 202, sealing ring; 203, clamp; 1, support frame; 2, fixed docking assembly; 21, limiting unit; 211, upper limit component; 212, lower limit component; 22, installation unit; 221, arc-shaped bracket; 222, lubricant channel; 3, movable docking assembly; 31, support ring; 311, arc-shaped guide groove; 32, rotating bushing; 321, operating handle; 33, replacement bushing; 34, locking assembly; 341, locking block; 342, linkage ring. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Reference Figures 1 to 3 A connection structure for fire protection piping networks is used to connect a water pump inlet 100 to a fire protection pipeline (not shown in the figure). The connection structure mainly includes connection components and auxiliary installation components.

[0045] The connecting assembly includes: an eccentric reducer 201, a sealing ring 202, and a clamp 203. The larger diameter end of the eccentric reducer 201 is used to connect to the fire-fighting pipeline, and the smaller diameter end is used to connect to the water pump inlet 100. The sealing ring 202 covers the connection between the eccentric reducer 201 and the water pump inlet 100, and the clamp 203 is fastened to the outer circumference of the sealing ring 202, pressing the sealing ring 202 tightly against the connection to form a reliable seal.

[0046] The auxiliary installation component is detachably installed on the water pump inlet 100 to assist in the installation of the eccentric reducer 201 (specifically, the auxiliary eccentric reducer 201 is installed flat on top of the water pump inlet 100) and the sealing ring 202. After installation, it can be removed as a whole and reused for the next installation task.

[0047] The auxiliary installation assembly includes: a support frame 1, a fixed docking assembly 2, and a movable docking assembly 3. The support frame 1 is used to support and carry other components. The support frame 1 has a height-adjustable structure, for example, it can use a telescopic sleeve with locking bolts, or a screw-driven lifting mechanism. Based on the actual posture of the fixed docking assembly 2 after clamping the water pump inlet 100, the height of the support frame 1 can be adjusted to provide stable bottom support for the entire auxiliary installation assembly, ensuring the accuracy and stability of subsequent docking operations.

[0048] Both the fixed docking assembly 2 and the movable docking assembly 3 are mounted on the support frame 1 and are arranged opposite to each other, corresponding to the water pump inlet 100 side and the eccentric reducer connecting pipe 201 side, respectively.

[0049] It is important to note that the key requirement for the installation of the eccentric reducer 201 at the connection with the water pump inlet 100 is to prevent air pocket formation. A flush connection (also known as "top-flat installation") should be used, meaning that the upper edge (top) of the eccentric reducer 201 should be at the same horizontal level, with the flat top directly above and the sloping bottom directly below. This eliminates the protruding area at the top of the pipe, preventing gas from escaping in the water flow from accumulating and forming air pockets. Air pockets reduce the water flow area, decrease the water output, and in severe cases, may cause cavitation damage to the water pump.

[0050] Reference Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The fixed docking assembly 2 includes a limiting unit 21 and an installation unit 22. The limiting unit 21 is used to clamp and position the water pump inlet 100. The limiting unit 21 includes an upper limiting member 211 and a lower limiting member 212 symmetrically distributed in the vertical direction, and an electric push rod (not labeled in the figure) that drives the relative movement of the two. Both the upper limiting member 211 and the lower limiting member 212 are provided with wedge-shaped positioning surfaces. During operation, the electric push rod drives the upper limiting member 211 and the lower limiting member 212 to move closer to each other, so that their wedge-shaped positioning surfaces form a close fit with the outer wall of the water pump inlet 100. After clamping, the centerline of the upper limiting member 211 and the lower limiting member 212 automatically aligns with the centerline of the water pump inlet 100, providing a reference for subsequent docking.

[0051] The mounting unit 22 is used to assist in the installation of the sealing ring 202. The mounting unit 22 includes two arc-shaped brackets 221. The two arc-shaped brackets 221 are symmetrically distributed vertically and can be axially slidably connected to the right side wall (i.e., the side near the eccentric reducer 201) of the upper limit member 211 and the lower limit member 212 via an electric slider. The two arc-shaped brackets 221 together form a complete annular support surface for supporting the sealing ring 202. To reduce the frictional resistance of the sealing ring 202 during installation and removal, the arc-shaped brackets 221 have multiple circumferentially evenly distributed lubricant channels 222 inside, and their support surfaces have lubricant outlets communicating with the corresponding lubricant channels 222. By injecting lubricant (such as lubricating oil or grease) into the lubricant channels 222, the lubricant seeps out from the lubricant outlets and coats the inner surface of the sealing ring 202, allowing the sealing ring 202 to slide smoothly during subsequent removal, avoiding jamming or twisting.

[0052] It should be noted that multiple lubricant channels 222 are introduced via flexible tubing, which connects to the external pump body (neither the flexible tubing nor the pump body is shown in the diagram). A chamfer or countersunk hole should be provided at the lubricant outlet to prevent sharp edges from scratching the sealing ring 202. The lubricant supply volume should be controlled between 1 ml and 3 ml each time (sufficient to coat the inner surface of the sealing ring 202 without excessive dripping), and the recommended pump outlet pressure is 0.2 MPa to 0.5 MPa.

[0053] Reference Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10 The movable docking assembly 3 is used to support the eccentric reducing pipe 201 and assists in the installation of the eccentric reducing pipe 201 through gravity self-leveling and fixed angle flipping. The movable docking assembly 3 includes a support ring 31, a rotating bushing 32, a replacement bushing 33, and a locking assembly 34.

[0054] The support ring 31 is slidably mounted on the support frame 1 in the horizontal direction via a movable seat, and can move towards or away from the water pump inlet 100 to achieve axial docking.

[0055] The rotating bushing 32 is circumferentially mounted inside the support ring 31. An operating handle 321 is fixedly mounted on the right side wall of the rotating bushing 32, and an arc-shaped guide groove 311 is provided on the support ring 31 for the operating handle 321 to pass through. The central angle of the arc-shaped guide groove 311 is 180 degrees, thus limiting the rotation range of the operating handle 321 to exactly half a turn.

[0056] It should be noted that during the subsequent gravity self-leveling stage, the rotating bushing 32 should remain stationary relative to the support ring 31. This can be achieved by setting a linkage locking switch on the operating handle 321 (unlocking when the handle is gripped and automatically locking when it is released). This ensures that only the replacement bushing 33 rotates relative to the rotating bushing 32 during the gravity self-leveling process, while the rotating bushing 32 itself remains stationary, thereby ensuring the uniqueness and accuracy of the leveling benchmark.

[0057] The replacement bushing 33 is detachably installed inside the rotating bushing 32, and its inner circumferential wall is interference-fitted with the large-diameter port of the eccentric reducing pipe 201. The replacement bushing 33 and the rotating bushing 32 are clearance-fitted, allowing the replacement bushing 33 to rotate freely in the circumference relative to the rotating bushing 32 for gravity self-leveling.

[0058] To accommodate different specifications of eccentric reducing pipe 201, the replacement bushing 33 can be designed in various sizes and specifications, and can be selected and replaced according to actual needs.

[0059] It should be noted that the bushing is made of engineering plastics, such as PTFE (polytetrafluoroethylene). A chamfer is provided at the bushing inlet to guide assembly. Its hardness is lower than that of the eccentric reducer 201, ensuring low friction to avoid affecting gravity-driven rotation while protecting the surface of the eccentric reducer 201 from damage. The bushing can be replaced after wear. The interference fit is controlled between 0.01mm and 0.03mm, providing only sufficient circumferential fixation (to prevent slippage) without generating additional frictional torque. Since the rotating bushing 32 is driven solely by gravity (torque generated by the eccentric mass), an annular or spiral oil groove can be provided on the inner wall of the rotating bushing 32 to ensure continuous lubrication. The surface roughness of the mating surfaces is recommended to be controlled at Ra≤0.8μm; a smooth surface significantly reduces the coefficient of friction.

[0060] A locking assembly 34 is disposed on the rotating bushing 32 and is used to lock the relative position of the replacement bushing 33 and the rotating bushing 32 after gravity self-leveling is completed. The locking assembly 34 includes a plurality of locking blocks 341 evenly distributed circumferentially, a linkage ring 342 connecting the plurality of locking blocks 341, and an electric push rod (not labeled in the figure) that drives the locking blocks 341 to move axially. The locking blocks 341 slide through the right side wall of the rotating bushing 32, and the side facing the replacement bushing 33 is provided with an elastic pad (such as a rubber pad or a polyurethane pad) to increase the coefficient of friction. When the electric push rod drives the locking blocks 341 to move inward, the elastic pad presses against the outer wall of the replacement bushing 33, and the resulting friction locks the circumferential position of the replacement bushing 33.

[0061] Furthermore, this invention also provides a connection method for fire protection pipe networks, which is completed using the aforementioned connection structure for fire protection pipe networks. Specifically, it includes the following steps: S1, clamping, positioning, and pre-installation: The outer wall of the water pump inlet 100 is clamped and limited by the fixed docking assembly 2. Specifically, the electric push rod is activated, driving the upper limit member 211 and the lower limit member 212 to move closer together, so that the wedge-shaped positioning surfaces on them are tightly fitted with the outer wall of the water pump inlet 100, completing the centering positioning. After clamping, the center lines of the upper limit member 211 and the lower limit member 212 are automatically aligned with the center line of the water pump inlet 100, providing a reference for the subsequent docking of the eccentric reducing pipe 201.

[0062] The sealing ring 202 is fitted onto the arc-shaped bracket 221 of the fixed docking assembly 2. The two arc-shaped brackets 221 together form a complete annular support surface, supporting the sealing ring 202 and holding it in the installation position. The external pump is started, and lubricant is injected into the lubricant channel 222 inside the arc-shaped bracket 221 through a flexible pipe. The lubricant seeps out evenly from the lubricant outlet on the support surface and coats the inner surface of the sealing ring 202.

[0063] Install the large-diameter port of the eccentric reducer 201 onto the replacement bushing 33.

[0064] S2, Gravity self-leveling: During the gravity self-leveling stage, the locking component 34 is in the unlocked state, and the rotating bushing 32 and the support ring 31 remain relatively stationary. Since the center of gravity of the eccentric reducing pipe 201 is biased towards the side with thicker pipe wall (i.e., the flat top side), the replacement bushing 33 can rotate freely in the circumference relative to the rotating bushing 32.

[0065] Under the influence of gravity, the replacement bushing 33 drives the eccentric reducer 201 to rotate automatically until the overall center of gravity of the eccentric reducer 201 is at its lowest position. At this time, the thick-walled side (flat-top side) of the eccentric reducer 201 is directly below, and the thin-walled side (sloping-bottom side) is directly above, which is in the "pipe bottom flat connection" state.

[0066] S3. Fixed Angle Flipping: After gravity self-leveling is completed, the locking assembly 34 is activated to lock the relative position of the replacement bushing 33 and the rotating bushing 32. Specifically, the electric push rod drives the linkage ring 342 to move axially, causing multiple locking blocks 341 evenly distributed circumferentially to move inward synchronously, so that the elastic pad at the end of the locking block 341 is tightly pressed against the outer wall of the replacement bushing 33, and the resulting friction is sufficient to lock the circumferential position of the replacement bushing 33.

[0067] After locking, the operator holds the operating handle 321 and slides it along the arc-shaped guide groove 311. The central angle of the arc-shaped guide groove 311 is 180 degrees, which limits the rotation range of the operating handle 321 to exactly half a turn. The operating handle 321 drives the rotating bushing 32 to rotate 180 degrees relative to the support ring 31.

[0068] Because the replacement bushing 33 and the rotating bushing 32 are locked together by the locking assembly 34, they rotate synchronously as a whole. Therefore, the eccentric reducer 201 rotates 180 degrees along with the rotating bushing 32, with its thick-walled side (flat-top side) rotating from directly below to directly above, and its thin-walled side (sloping-bottom side) rotating from directly above to directly below. At this time, the eccentric reducer 201 is in a "pipe top flat connection" state, meaning that the upper edge (pipe top) of the eccentric reducer 201 is at the same horizontal level, fully complying with fire safety regulations. Furthermore, this process eliminates the need for manual leveling using measuring tools such as spirit levels, thus eliminating human error and resulting in high installation accuracy and consistency.

[0069] S4. Assembly and Fastening: After completing the fixed angle flip, the eccentric reducer 201 is in the correct "pipe top flat connection" installation angle. At this time, drive the movable seat of the movable docking assembly 3 to make the support ring 31 slide horizontally towards the water pump inlet 100, thereby driving the eccentric reducer 201 to move axially so that its small diameter port docks with the water pump inlet 100.

[0070] After docking, the arc-shaped bracket 221 is driven by an electric slider to slide axially towards the docking point. The operator then removes the sealing ring 202. Because the inner surface of the sealing ring 202 has been pre-coated with lubricant and the support surface of the arc-shaped bracket 221 is smooth, the sealing ring 202 slides smoothly without jamming or twisting during removal. When the arc-shaped bracket 221 slides to the predetermined position, the sealing ring 202 is removed from the arc-shaped bracket 221 and placed at the connection between the eccentric reducer 201 and the water pump inlet 100, accurately falling into the sealing groove.

[0071] Finally, clamps 203 are installed and tightened around the outer periphery of the sealing ring 202. The clamps 203 evenly press the sealing ring 202 against the joint, forming a reliable seal.

[0072] S5. Remove tooling: After assembly and fastening, release the clamping force of the fixed docking assembly 2: the electric push rod drives the upper limit member 211 and the lower limit member 212 to move away from each other, so that the wedge-shaped positioning surface is disengaged from the outer wall of the water pump inlet 100. At the same time, unlock all locking mechanisms of the movable docking assembly 3, and remove the entire auxiliary installation assembly from the connected pipe as a whole.

[0073] The removed auxiliary installation components can be reused for the next installation of the eccentric reducer 201. For different sizes of eccentric reducers 201, only the corresponding replacement bushing 33 needs to be replaced; no other components need to be adjusted.

[0074] The aforementioned connection method for fire protection pipe networks involves two steps: "gravity self-leveling" and "fixed-angle flipping." This flips the thick-walled side of the eccentric reducer 201 from its naturally determined downward position to its upward position, achieving the "top-side flush connection" installation required by regulations. This method utilizes the eccentric center of gravity of the eccentric reducer 201, eliminating the need for measuring tools such as spirit levels, thus reducing human error and significantly improving installation efficiency and accuracy.

[0075] Meanwhile, the design of the arc-shaped bracket 221 and its lubricant channel 222 enables the pre-installation, lubrication, and positioning of the sealing ring 202, preventing twisting, misalignment, or jamming of the sealing ring 202 during installation and ensuring sealing reliability. The entire auxiliary installation assembly can be removed and recycled after installation, demonstrating good economy and versatility.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A connection structure for a fire-fighting pipeline network, used to connect a water pump inlet to a fire-fighting pipeline, characterized in that, include: Connection components and auxiliary installation components; The connecting assembly includes an eccentric reducing pipe, the large-diameter port of which is used to connect to the fire-fighting pipeline, and the small-diameter port of which is used to connect to the water pump inlet. A sealing ring is placed around the connection between the eccentric reducer and the water pump inlet. The clamp is fastened to the outer circumference of the sealing ring; The auxiliary installation component is detachably installed on the water pump inlet to assist in installation and is removed after installation; the auxiliary installation component includes a support frame and a fixed docking component and a movable docking component disposed on the support frame; The fixed docking assembly includes a limiting unit for clamping and positioning the water pump inlet and an installation unit for assisting in the installation of the sealing ring; the movable docking assembly is used to support the eccentric reducer and assists in the installation of the eccentric reducer by gravity self-leveling and fixed angle flipping.

2. The connection structure for fire protection pipe network according to claim 1, characterized in that, The limiting unit includes an upper limiting component and a lower limiting component symmetrically distributed along the vertical direction, as well as an electric actuator that drives the relative movement of the two components; both the upper and lower limiting components are provided with wedge-shaped positioning surfaces for forming a close fit with the outer wall of the water pump inlet for limiting.

3. The connection structure for fire protection pipe network according to claim 2, characterized in that, The installation unit includes two arc-shaped brackets disposed on the limiting unit. The two arc-shaped brackets are symmetrically distributed in the vertical direction and are slidably connected to the right side wall of the upper and lower limiting components along the axial direction.

4. A connection structure for fire protection pipe networks according to claim 3, characterized in that, The two arc-shaped brackets together form an annular support surface for supporting the sealing ring; the arc-shaped brackets have multiple lubricant channels inside, and their support surfaces have lubricant outlets that communicate with the corresponding lubricant channels.

5. A connection structure for fire protection pipe networks according to claim 1, characterized in that, The movable docking assembly includes a support ring, a rotating bushing, a replacement bushing, and a locking assembly. The support ring is slidably mounted on the support frame in the horizontal direction via a movable seat.

6. A connection structure for fire protection pipe networks according to claim 5, characterized in that, The rotating bushing is circumferentially rotatable and installed inside the support ring. The replacement bushing is detachably installed inside the rotating bushing and circumferentially rotatable relative to the rotating bushing.

7. A connection structure for fire protection pipe networks according to claim 6, characterized in that, The rotating bushing has an operating handle fixedly mounted on its side wall, and the support ring has an arc-shaped guide groove through which the operating handle passes, with the central angle of the arc-shaped guide groove being 180 degrees.

8. A connection structure for fire protection pipe networks according to claim 5, characterized in that, The locking assembly is disposed on the rotating bushing. The locking assembly includes multiple locking blocks evenly distributed circumferentially, a linkage ring connecting the multiple locking blocks, and an electric push rod that drives the linkage ring to move axially. The locking blocks slide through the right side wall of the rotating bushing, and an elastic pad layer for increasing the coefficient of friction is provided on the side facing the replacement bushing.

9. A connection structure for fire protection pipe networks according to claim 1, characterized in that, The support frame is used to provide bottom support according to the posture of the fixed docking assembly after clamping.

10. A method for connecting fire protection pipe networks is completed using a connection structure for fire protection pipe networks as described in any one of claims 1 to 9, characterized in that: Includes the following steps: S1. Clamping, positioning and pre-installation: The outer wall of the water pump inlet is clamped and limited by the fixed docking assembly; and the sealing ring is fitted and installed on the fixed docking assembly; the large diameter port of the eccentric reducing pipe is installed on the movable docking assembly. S2. Gravity self-leveling: Under the action of gravity, the eccentric reducer automatically rotates until the overall center of gravity of the eccentric reducer is at the lowest position, at which point it is in the "pipe bottom flat connection" state. S3, Fixed Angle Reversal: The position of the eccentric reducer is locked by the locking component, and the eccentric reducer is rotated 180 degrees to the "pipe top flat connection" state. S4. Assembly and fastening: Move the eccentric reducing pipe axially so that its smaller diameter end aligns with the water pump inlet; push the sealing ring down to the mating point and install clamps around the outer circumference of the sealing ring for fastening; S5. Remove fixture: Release and remove the auxiliary installation fixture to complete the connection.

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