Quick mounting pipe fitting for building fire engineering

The plug-in connection mechanism of the limiting block and the limiting protrusion solves the problems of troublesome threaded connection between branch pipes and mechanical pipe fittings and corrosion and stripping in the existing technology, realizes rapid installation and disassembly, and improves the connection efficiency and sealing of fire protection pipelines.

CN224017941UActive Publication Date: 2026-03-20CHINA CONSTR INVESTMENT & CONSTR GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-03
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

In existing building fire protection engineering, the threaded connection between branch pipes and mechanical pipe fittings causes installation trouble, and after long-term use, the threads are prone to rust and stripping, affecting the efficiency of disassembly, maintenance and replacement.

Method used

The connection mechanism of limiting blocks and limiting protrusions is adopted to connect the branch pipe and mechanical fittings through plug-in connection, and is fixed with studs and nuts to avoid repeated rotation and achieve quick installation and disassembly.

Benefits of technology

It improves the efficiency of fire protection pipeline connection, avoids thread corrosion and stripping, simplifies the disassembly and assembly process, and ensures stable connection and sealing effect between branch pipes and mechanical fittings.

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Patent Text Reader

Abstract

The utility model discloses a fast installation pipe fitting for building fire protection engineering, which comprises two fixing frames which are symmetrically distributed up and down, a water inlet pipe is arranged between the two fixing frames, one side of the interior of each fixing frame far away from the middle part of the water inlet pipe is provided with an installation port, the interior of each installation port is inserted with a branch pipe, and the fast installation pipe fitting also comprises a connecting mechanism, the connecting mechanism comprises connecting frames, limiting blocks and limiting protrusions, the connecting frames are arranged in the middle of the outer surface of the fixing frame in a sleeving mode, and the limiting blocks are arranged in the middles of the sides, away from the middle of the water inlet pipe, of the connecting frames. The branch pipe and the mechanical pipe fitting can be rapidly connected together by extruding the limiting protrusion through the limiting block, the situation that the branch pipe is repeatedly rotated during disassembly and assembly is avoided, and then the situation that the branch pipe and the mechanical pipe fitting are slipped due to thread corrosion is avoided.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipe fitting for fire fighting pipeline, in particular to a quick installation pipe fitting for building fire engineering. BACKGROUND

[0002] With the acceleration of urbanization and the increase of high-rise buildings, the high concentration of population and property leads to the aggravation of fire risk, and fire engineering reduces the probability of fire occurrence, controls the spread of disaster and guarantees the safe evacuation of personnel through the scientific design of fire warning, prevention and control and evacuation system, which is the core guarantee of modern building safety, and building fire engineering is mainly composed of automatic fire alarm system, automatic fire extinguishing system, smoke control and exhaust system, fire water supply system, emergency lighting and evacuation indication system, building fire separation facility and evacuation passage and safety exit design, wherein, the fire water supply system is the core component of building fire engineering, mainly composed of fire water source, fire water pump, water supply network, indoor and outdoor fire hydrant and control system, and its core function is to provide continuous and stable fire water meeting the pressure and flow requirements for fire fighting, the system pressurizes the water source through the water pump and transports it through the pipe network to quickly distribute it to the fire hydrant or automatic sprinkler equipment, ensuring sufficient and reliable water source during the fire extinguishing process, the existing water supply network is mainly composed of a main water inlet pipe and a plurality of branch pipes, the main water inlet pipe and the branch pipes are connected through mechanical pipe fittings, common mechanical pipe fittings include mechanical tee and mechanical cross, during use, the end of the branch pipe is screwed to one end of the mechanical pipe fitting, then the branch pipe is aligned with the water outlet of the main water inlet pipe, and then the fixing bolt is tightened to tightly connect the mechanical pipe fitting to the outer surface of the main water inlet pipe, completing the connection between the main water inlet pipe and the branch pipe, the conventional mechanical pipe fitting connects the branch pipe and the mechanical pipe fitting together through threads, which needs to be rotated repeatedly during installation, which is very troublesome, and after long-term use, the branch pipe and the mechanical pipe fitting connected through threads may slip due to thread corrosion, which is not convenient for subsequent disassembly, maintenance and replacement of the pipeline. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem of overcoming the defects of the prior art and provides a quick installation pipe fitting for building fire engineering, which is provided with a connecting mechanism, the branch pipe and the mechanical pipe fitting are quickly connected together through the extrusion of the limiting block on the limiting protrusion, which avoids the repeated rotation of the branch pipe during disassembly and assembly, thereby avoiding the slipping of the branch pipe and the mechanical pipe fitting due to thread corrosion, and effectively solving the problems in the background art.

[0004] To achieve the above object, the utility model provides following technical scheme: a kind of quick installation pipe fitting for building fire engineering, including fixed frame, the fixed frame has two and is symmetrically distributed upside down, one water inlet pipe is equipped between two fixed frames, the inside of mounting port is inserted with branch pipe, still including connecting mechanism, the inside of mounting port is inserted with branch pipe,

[0005] Connecting mechanism: it includes connecting frame, limit block and limit protrusion, the connecting frame is all set in the outer surface middle part of fixed frame, limit block is all set in the middle of the side of connecting frame far from the middle part of water inlet pipe, limit protrusion is all set in the outer surface middle part of branch pipe, limit block is all installed with longitudinally adjacent limit protrusion, and it provides foundation for the fixation of branch pipe, is equipped with connecting mechanism, and the limit protrusion can be extruded by limit block so that branch pipe and mechanical pipe fitting are quickly connected together, avoid the situation of repeatedly rotating branch pipe when disassembling, and further avoid the situation of sliding silk between branch pipe and mechanical pipe fitting due to thread corrosion.

[0006] Further, the connecting mechanism further includes a limit groove, the limit groove is respectively formed on the left and right sides of the outer surface of the fixed frame, and the inner wall of the limit groove is slidably connected with the outer surface of the longitudinally adjacent limit block near the middle part of the branch pipe, thereby providing a limiting and guiding effect for the connecting frame and the limit block.

[0007] Further, the limit protrusion has a relief opening formed in the middle of the front and back sides of the outer surface, and the inner wall of the relief opening is matched with the outer surface of the transversely adjacent limit block, thereby providing a relief effect for the limit block.

[0008] Further, the connecting mechanism further includes a positioning block and a positioning groove, the positioning block is respectively arranged at the front and back ends of the side of the limit protrusion near the middle part of the water inlet pipe, and the positioning groove is uniformly formed on the inner wall of the mounting port away from the middle part of the water inlet pipe, the outer surface of the positioning block located in the same mounting port is inserted into the inner wall of the positioning groove, thereby providing a positioning effect for the branch pipe to avoid deviation of the branch pipe.

[0009] Further, the connecting mechanism further includes a sealing rubber pad one and a sealing rubber pad two, the sealing rubber pad one is arranged on the stepped surface of the mounting port, one end of the sealing rubber pad one away from the middle part of the water inlet pipe is attached to the inner side end of the transversely adjacent branch pipe, and the sealing rubber pad two is arranged on the middle part of the inner wall of the fixed frame, the outer side end of the sealing rubber pad two is attached to the outer surface of the water inlet pipe, thereby providing a sealing effect for the connection of the water inlet pipe, the branch pipe and the mechanical pipe fitting.

[0010] Further, it further includes a slot and a plug, the slot is respectively formed in the middle of the left and right sides of the upper end of the lower fixed frame, and the plug is respectively arranged in the middle of the left and right sides of the lower end of the upper fixed frame, the outer surface of the plug is inserted into the inner wall of the vertically adjacent slot, thereby providing a positioning effect for the connection of the upper and lower fixed frames.

[0011] Further, it further includes installation slot, nut and stud, the installation slot is opened respectively in the left and right sides of the upper connecting frame upper end, the nut is arranged in the inside of the installation slot, the stud is all screw thread connection in the inside of the nut middle, the inside of the left and right sides of the fixed frame and the connecting frame middle is equipped with installation hole, the inner wall of the installation hole is all with the outer surface of the vertically adjacent stud is inserted, it is the connection fixed effect of water inlet pipe, branch pipe and mechanical pipe fitting.

[0012] Compared with the prior art, the beneficial effects of the utility model are that the quick installation pipe fitting for building fire engineering has the following advantages:

[0013] Abandon the traditional thread connection, the mechanical pipe fitting and branch pipe are connected through the plug-in mode, the limiting block extrusion limiting protrusion is extruded, the branch pipe is quickly limited, the mechanical pipe fitting is fixed with the water inlet pipe, and the branch pipe is also fixed, the situation of repeatedly rotating the branch pipe during disassembly is avoided, and the situation of thread corrosion between the branch pipe and the mechanical pipe fitting is avoided, thereby the connection efficiency of the fire pipeline is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structural schematic diagram of the utility model;

[0015] Fig. 2 It is the sectional structure schematic diagram of the connecting mechanism of the utility model;

[0016] Fig. 3 It is the explosion structure schematic diagram of the connecting mechanism of the utility model.

[0017] In the drawing: 1 fixed frame, 2 water inlet pipe, 3 branch pipe, 4 connecting mechanism, 41 connecting frame, 42 limiting block, 43 limiting groove, 44 limiting protrusion, 45 positioning block, 46 positioning groove, 47 sealing rubber pad one, 48 sealing rubber pad two, 5 insertion slot, 6 insertion block, 7 installation slot, 8 nut, 9 stud. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, apparently, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0019] Please refer to Figs. 1-3The embodiment provides a technical scheme: a quick installation pipe fitting for building fire engineering, which comprises a fixing frame 1, the fixing frame 1 is two and symmetrically distributed upwards and downwards, the fixing frame 1 is semicircular, an inlet pipe 2 is arranged between the two fixing frames 1, installation ports are formed in the fixing frame 1 away from the middle part of the inlet pipe 2, the installation ports are overall ladder-shaped, the diameter of the side of the installation port away from the middle part of the inlet pipe 2 is large, the diameter of the side of the installation port close to the middle part of the inlet pipe 2 is small, branch pipes 3 are inserted into the installation ports, and the quick installation pipe fitting further comprises a connecting mechanism 4;

[0020] The connecting mechanism 4 comprises a connecting frame 41, a limiting block 42 and a limiting protrusion 44, the connecting frame 41 is sleeved in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting protrusion 44 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting protrusion 44 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixed frame 1, the limiting block 42 is arranged in the middle part of the outer surface of the fixedThe limiting block 42 extrudes the limiting protrusion 44, so that the branch pipe 3 is quickly connected with the mechanical pipe fitting, the repeated rotation of the branch pipe during disassembly is avoided, and the thread corrosion between the branch pipe 3 and the mechanical pipe fitting is avoided.

[0021] The working principle of the quick installation pipe fitting for building fire engineering is as follows: when the installation pipe fitting is used to connect the water inlet pipe 2 and the branch pipe 3, at this time, the upper and lower two fixing frames 1 are in a separated state, the connecting frame 41 is picked up and is sleeved at the end of the branch pipe 3, at this time, the limiting block 42 is aligned with the avoiding opening, the connecting frame 41 is moved to the branch pipe 3 direction and drives the connecting frame 41 to move, until the top wall of the limiting block 42 passes the limiting protrusion 44, the connecting frame 41 is rotated by 90 degrees, the top wall of the limiting block 42 is attached to the side, away from the middle of the water inlet pipe 2, of the limiting protrusion 44, then the branch pipe 3 is inserted into the corresponding installation opening, in this process, the positioning block 45 is vertically adjacent to the positioning groove 46, the limiting block 42 is vertically adjacent to the limiting groove 43, with the movement of the branch pipe 3, the positioning block 45 is inserted into the corresponding positioning groove 46, the limiting block 42 is inserted into the limiting groove 43, the limiting groove 43 forms the limiting and guiding effect on the limiting block 42, until the inner side of the branch pipe 3 is attached to the sealing rubber pad one 47, at this time, the preliminary connection of the mechanical pipe fitting and the branch pipe 3 is completed, then the upper and lower two fixing frames 1 are closed together and are sleeved on the outer surface of the water inlet pipe 2, the plug 6 is inserted into the plug groove 5, the plug groove 5 and the plug 6 form the positioning and guiding effect on the connection of the upper and lower two fixing frames 1, at the same time, the water outlet on the outer surface of the water inlet pipe 2 is vertically adjacent to the branch pipe 3, then the nut 8 is put into the installation groove 7, at this time, the installation holes of the fixing frame 1 and the connecting frame 41 located on the same side are vertically adjacent and form a through hole, the stud 9 is passed through the through hole, when the upper end of the stud 9 contacts the nut 8, the nut 8 is limited by the installation groove 7 and does not move, the stud 9 is rotated by an external wrench, the stud 9 is threadedly connected with the nut 8, with the rotation of the stud 9, the distance between the hexagonal head of the stud 9 and the nut 8 gradually becomes smaller, the extrusion effect is formed on the fixing frame 1 and the connecting frame 41, until the upper end of the hexagonal head of the stud 9 is tightly attached to the lower end of the lower connecting frame 41, the gap between the fixing frame 1 and the connecting frame 41 disappears, at this time, the upper and lower two fixing frames 1 are tightly sleeved on the outer surface of the water inlet pipe 2, the outer side of the sealing rubber pad two 48 is also tightly attached to the outer surface of the water inlet pipe 2 to form a sealing effect, the top wall of the limiting block 42 tightly extrudes the limiting protrusion 44, so that the branch pipe 3 is also tightly attached to the sealing rubber pad one 47 to form a sealing effect, the quick connection of the water inlet pipe 2, the branch pipe 3 and the mechanical pipe fitting is completed, when the branch pipe 3 is disassembled, repaired and replaced, the nut 8 and the stud 9 are separated by loosening and rotating the stud 9, then the connecting frame 41, the limiting block 42 and the branch pipe 3 are separated from the fixing frame 1, then the limiting block 42 is rotated by 90 degrees, the limiting block 42 and the branch pipe 3 are separated, so that the new branch pipe 3 is replaced.

[0022] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A quick-installation pipe fitting for building fire protection engineering, comprising a fixing frame (1), wherein there are two fixing frames (1) arranged symmetrically in an upper and lower position, and a water inlet pipe (2) is provided between the two fixing frames (1). An installation port is provided on the side of the fixing frame (1) away from the middle of the water inlet pipe (2), and a branch pipe (3) is inserted into the installation port. The fitting is characterized in that: It also includes a connecting mechanism (4); Connection mechanism (4): It includes a connection frame (41), a limiting block (42) and a limiting protrusion (44). The connection frame (41) is sleeved on the middle of the outer surface of the fixed frame (1). The limiting block (42) is located on the middle of the side of the connection frame (41) away from the middle of the water inlet pipe (2). The limiting protrusion (44) is located on the middle of the outer surface of the branch pipe (3). The limiting block (42) is installed in cooperation with the longitudinally adjacent limiting protrusion (44).

2. The quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: The connecting mechanism (4) also includes a limiting groove (43), which is respectively opened on the left and right sides of the outer surface of the fixed frame (1). The inner wall of the limiting groove (43) is slidably connected to the side of the outer surface of the longitudinally adjacent limiting block (42) near the middle of the branch pipe (3).

3. A quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: The front and rear sides of the outer surface of the limiting protrusion (44) are provided with clearance openings, and the inner walls of the clearance openings are fitted to the outer surfaces of the adjacent limiting blocks (42) in the lateral direction.

4. A quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: The connecting mechanism (4) further includes a positioning block (45) and a positioning groove (46). The positioning block (45) is respectively located at the front and rear ends of the side of the limiting protrusion (44) near the middle of the water inlet pipe (2). The positioning groove (46) is evenly opened on the inner wall of the installation port away from the middle of the water inlet pipe (2). The outer surface of the positioning block (45) located inside the same installation port is inserted into the inner wall of the positioning groove (46).

5. A quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: The connecting mechanism (4) also includes a sealing gasket one (47) and a sealing gasket two (48). The sealing gasket one (47) is set on the stepped surface of the installation port. The end of the sealing gasket one (47) away from the middle of the water inlet pipe (2) is attached to the inner end of the horizontally adjacent branch pipe (3). The sealing gasket two (48) is set in the middle of the inner wall of the fixing frame (1). The outer end of the sealing gasket two (48) is attached to the outer surface of the water inlet pipe (2).

6. A quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: It also includes slots (5) and inserts (6). The slots (5) are respectively opened on the middle of the left and right sides of the upper end of the lower fixing frame (1), and the inserts (6) are respectively set on the middle of the left and right sides of the lower end of the upper fixing frame (1). The outer surface of the inserts (6) is inserted into the inner wall of the vertically adjacent slots (5).

7. A quick-installation pipe fitting for building fire protection engineering according to claim 1, characterized in that: It also includes mounting slots (7), nuts (8) and studs (9). The mounting slots (7) are respectively opened on the left and right sides of the upper end of the connecting frame (41). The nuts (8) are all set inside the mounting slots (7). The studs (9) are all threaded to the middle of the inside of the nuts (8). Mounting holes are opened in the middle of the left and right sides inside the fixing frame (1) and the connecting frame (41). The inner wall of the mounting hole is inserted into the outer surface of the vertically adjacent studs (9).