Pipe fitting convenient to mount and dismount for civil engineering construction

Abstract

The invention discloses a pipe fitting convenient to mount and dismount for civil engineering construction, and relates to the field of civil engineering construction. The pipe fitting convenient to mount and dismount comprises a connecting pipe, a sealing assembly, a pushing assembly and a clamping assembly, the sealing assembly is arranged on one side of the connecting pipe, the pushing assembly is arranged on the sealing assembly, the clamping assembly is arranged in the connecting pipe, and the clamping assembly comprises a conical clamp, a clamp mounting seat, an extrusion block and a limiting clamp seat. The conical clamp is fixedly installed at one end of the clamp installation base, the extrusion block is movably connected into the clamp installation base, and the extrusion block abuts against the conical clamp. According to the pipe fitting convenient to mount and dismount, the conical clamping hoop is extruded by the pipeline to be clamped in the clamping groove of the pipeline, so that the pipeline is fixedly clamped in the connecting pipe, mounting is more convenient and faster, the conical clamping hoop is extruded by the extrusion block, the conical clamping hoop is moved out of the clamping groove of the pipeline, and then the pipeline can be quickly moved out of the connecting pipe; and the pipe fitting can be disassembled more quickly and conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering construction, in particular to a pipe fitting which is convenient for installation and disassembly in civil engineering construction. Background Art

[0002] There are many kinds of pipe fittings used in civil engineering construction. According to different uses, materials and specifications, they can be divided into many types, mainly including plastic pipe fittings, steel pipe fittings and composite pipe fittings. During the installation process, the appropriate type and specification of pipe fittings should be selected according to the project requirements to ensure that the pipe fittings can meet the design requirements and use conditions of the project.

[0003] In civil engineering construction, there are various ways to connect pipes, each of which has its own unique characteristics and applicable scenarios. The main connection methods include threaded connection, flange connection, welding and ferrule connection. When choosing a pipeline connection method, comprehensive consideration should be given to factors such as the requirements of the specific scenario, pipeline material, working pressure and construction conditions.

[0004] However, most existing civil engineering construction pipe connections mainly use threaded connection, flange connection and welding. These connection methods not only require the use of tools during installation, but also the installation process is cumbersome, which makes the pipe construction efficiency low and the pipes are not easy to disassemble after connection. In addition, the rubber sealing rings at some pipe connections are easy to loosen during installation, resulting in the risk of leakage at the pipe connections. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a pipe fitting for easy installation and disassembly for civil engineering construction, which solves the problem that most pipe fittings not only need tools to be installed, but also the installation process is cumbersome, resulting in low efficiency of pipe fitting construction, and the pipe fittings are not easy to disassemble after being connected. In addition, the rubber sealing rings at the connection of some pipe fittings are easy to loosen during the installation process, resulting in the risk of leakage at the connection of the pipe fittings.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A pipe fitting for easy installation and removal for civil engineering construction includes a pipe, and a connecting unit is installed on one side of the pipe;

[0007] The connecting unit comprises a connecting tube, a sealing assembly, a pushing assembly and a clamping assembly, wherein the sealing assembly is arranged on one side of the connecting tube, the pushing assembly is arranged on the sealing assembly, and the clamping assembly is arranged in the connecting tube;

[0008] The clamping assembly includes a conical clamp, a clamp mounting seat, an extrusion block and a limiting clamp seat. The conical clamp is fixedly mounted on one end of the clamp mounting seat, the clamp mounting seat is fixedly mounted on the inner wall of the connecting pipe, the extrusion block is movably connected in the clamp mounting seat, and the extrusion block abuts against the conical clamp, and the limiting clamp seat is arranged on one side of the clamp mounting seat.

[0009] Preferably, a clamping groove is provided on the pipe, the end of the conical clamp is clamped in the clamping groove, and the limiting clamp seat is fixedly connected to the inner wall of the connecting pipe.

[0010] Preferably, the sealing assembly comprises a pipe sleeve seat and a first sleeve ring, wherein the pipe sleeve seat is fixedly connected to one end of the first sleeve ring, a sliding groove is provided on the pipe sleeve seat, and the other end of the first sleeve ring is inserted into the connecting pipe.

[0011] Preferably, the pushing assembly includes a pushing block, a movable sleeve and a fastening bolt, the pushing block is movably arranged on one side of the pipe sleeve seat, the movable sleeve is fixedly connected to the other side of the pushing block, the fastening bolt is threadedly connected to the pushing block, and the bottom end of the fastening bolt abuts against the pipe sleeve seat.

[0012] Preferably, a sliding block is fixedly connected to one side of the pushing block, and the sliding block is slidably connected to the sliding groove.

[0013] Preferably, the clamping assembly also includes a second ring and a third ring, the second ring is fixedly connected to the other end of the clamp mounting seat, the third ring is slidably connected in the second ring, and one end of the third ring is fixedly connected to the other end of the extrusion block.

[0014] Preferably, the other end of the third sleeve is in contact with the movable sleeve.

[0015] Preferably, the connecting unit further comprises a sealing assembly, and the sealing assembly is arranged on one side of the limiting clamp seat.

[0016] Preferably, the sealing assembly includes a rubber sealing ring, a tightening spring and a sealing seat, the rubber sealing ring is sleeved on the sealing seat, the tightening spring is arranged on the sealing seat, and the tightening spring and the rubber sealing ring are pressed and connected, and the sealing seat is fixedly connected to the inner wall of the connecting pipe.

[0017] The invention discloses a pipe fitting for easy installation and removal for civil engineering construction, which has the following beneficial effects:

[0018] 1. A pipe fitting for easy installation and removal for civil engineering construction is provided. The pipe is inserted into the connecting pipe from the middle of the pushing block, and the pipe passes through the movable sleeve, the third sleeve and the extrusion block, and finally passes through the tapered clamp. The tapered clamp is extruded and stretched outward until the two pipes are abutted in the middle of the connecting pipe. At this time, the tapered clamp is clamped in the clamping groove of the pipe, so that the pipe is fixedly clamped in the connecting pipe, making the installation more convenient and quick, improving the pipe connection efficiency, and accelerating the construction progress.

[0019] 2. This kind of pipe fittings is easy to install and disassemble for civil engineering construction. Sealing seats are arranged on both sides of the pipe connection. Tightening springs are arranged in the sealing seats. Rubber sealing rings are sleeved on the sealing seats. When the pipe passes through the rubber sealing ring, the rubber sealing ring is squeezed. At this time, the tightening spring is tightened inward, so that the rubber sealing ring is always in contact with the pipe, which not only ensures that the pipe connection is not easy to leak, but also ensures that the rubber sealing ring is always in close contact with the pipe during long-term use.

[0020] 3. This kind of civil engineering construction is convenient for installing and disassembling pipe fittings. By loosening the fastening bolts, the pushing block is in an active state, and the pushing block drives the movable ring to move, drives the third ring to move in the second ring, and then drives the extrusion block to extrude the conical clamp, so that the conical clamp is moved out of the pipe groove, and the pipe can be quickly moved out of the connecting pipe, making the pipe fitting disassembly faster and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection of various components of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the sealing component and the pushing component of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the clamping assembly of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the sealing assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the pipeline structure of the present invention.

[0029] In the figure: 1. pipeline; 11. slot; 2. connecting unit; 21. connecting pipe; 22. sealing assembly; 221. pipe sleeve seat; 2211. slide groove; 222. first sleeve ring; 23. pushing assembly; 231. pushing block; 2311. slider; 232. movable sleeve ring; 233. fastening bolt; 24. clamping assembly; 241. conical clamp; 242. clamp mounting seat; 243. second sleeve ring; 244. extrusion block; 245. third sleeve ring; 246. limiting clamp seat; 25. sealing assembly; 251. rubber sealing ring; 252. tightening spring; 253. sealing seat. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The embodiment of the present application provides a pipe fitting that is easy to install and disassemble for civil engineering construction, thereby solving the problem that most pipe fittings not only need tools to be installed, but also the installation process is cumbersome, which makes the pipe fitting construction efficiency low, and the pipe fittings are not easy to disassemble after being connected. In addition, the rubber sealing ring 251 at the connection of some pipe fittings is easy to loosen during the installation process, resulting in the risk of leakage at the connection of the pipe fittings. The pipe 1 is inserted into the connecting pipe 21 from the middle of the pushing block 231, and the pipe 1 passes through the movable ring 232, the third ring 245 and the extrusion block 244, and finally passes through the conical clamp 241, and the conical clamp 241 is squeezed to extend outward until the two pipes 1 are abutted against the middle of the connecting pipe 21. At this time, the conical clamp 241 is clamped in the clamping groove 11 of the pipe 1, so that the pipe 1 is fixedly clamped in the connecting pipe 21, making the installation more convenient and quick, and the disassembly is convenient. By loosening the fastening bolt 233, the pushing block 231 is in an active state, and the pushing block 231 is pushed to drive the movable ring 232 to move, and the third ring 245 is driven in the second The sleeve ring 243 moves, thereby driving the extrusion block 244 to squeeze the tapered clamp 241, so that the tapered clamp 241 is moved out of the clamping groove 11 of the pipe 1, and the pipe 1 can be quickly moved out of the connecting pipe 21, making the pipe fitting disassembly faster and more convenient; and by providing sealing seats 253 on both sides of the connection of the pipe 1, a tightening spring 252 is provided in the sealing seat 253, and the rubber sealing ring 251 is sleeved on the sealing seat 253. When the pipe 1 passes through the rubber sealing ring 251, the rubber sealing ring 251 is squeezed. At this time, the tightening spring 252 is tightened inwardly, so that the rubber sealing ring 251 is always in contact with the pipe 1, which not only ensures that the connection of the pipe 1 is not easy to leak, but also ensures that the rubber sealing ring 251 is always tightly against the pipe 1 during long-term use of the pipe 1.

[0032] The embodiment of the invention discloses a pipe fitting which is convenient for installation and disassembly in civil engineering construction.

[0033] According to the attached Figure 1-7 As shown, it includes a pipeline 1, a connecting unit 2 is installed on one side of the pipeline 1, the connecting unit 2 includes a connecting tube 21, a sealing component 22, a pushing component 23 and a clamping component 24, the sealing component 22 is arranged on one side of the connecting tube 21, the pushing component 23 is arranged on the sealing component 22, and the clamping component 24 is arranged in the connecting tube 21.

[0034] Specifically disclosed, the clamp assembly 24 includes a tapered clamp 241, a clamp mounting seat 242, an extrusion block 244 and a limiting clamp seat 246. The tapered clamp 241 is fixedly mounted on one end of the clamp mounting seat 242. The clamp mounting seat 242 is fixedly mounted on the inner wall of the connecting pipe 21. The extrusion block 244 is movably connected in the clamp mounting seat 242, and the extrusion block 244 abuts against the tapered clamp 241. The limiting clamp seat 246 is arranged on one side of the clamp mounting seat 242.

[0035] Furthermore, a clamping groove 11 is opened on the pipeline 1, and the end of the conical clamp 241 is clamped in the clamping groove 11. By clamping the end of the conical clamp 241 in the clamping groove 11, the pipeline 1 can be fixedly clamped in the connecting pipe 21, and the limiting clamp seat 246 is fixedly connected to the inner wall of the connecting pipe 21. By setting the limiting clamp seat 246, the deformation of the conical clamp 241 is limited, thereby protecting the conical clamp 241.

[0036] Furthermore, the sealing component 22 includes a pipe sleeve seat 221 and a first ring 222. The pipe sleeve seat 221 is fixedly connected to one end of the first ring 222. The pipe sleeve seat 221 is provided with a slide groove 2211. The other end of the first ring 222 is inserted into the connecting pipe 21. A limiting component is provided on the first ring 222, so that the first ring 222 can be fixed on the inner wall of the connecting pipe 21, and then the pipe sleeve seat 221 is fixed on the connecting pipe 21. The first ring 222 can also be removed from the connecting pipe 21 through the limiting component, and then the pipe sleeve seat 221 can be disassembled, so as to facilitate the maintenance and repair of the clamping component 24 in the connecting pipe 21.

[0037] The push assembly 23 includes a push block 231, a movable collar 232 and a fastening bolt 233. The push block 231 is movably arranged on one side of the pipe sleeve seat 221, and the movable collar 232 is fixedly connected to the other side of the push block 231. The fastening bolt 233 is threadedly connected to the push block 231, and the bottom end of the fastening bolt 233 abuts against the pipe sleeve seat 221. By setting the fastening bolt 233, the push block 231 can be stabilized on the pipe sleeve seat 221 to prevent it from being affected by external forces. In order to prevent damage from occurring under use, the fastening bolt 233 can be loosened to make the push block 231 active. Pushing the push block 231 can drive the movable ring 232 to move, and then drive the third ring 245 to move in the second ring 243, and then drive the extrusion block 244 to extrude the conical clamp 241, so that the conical clamp 241 is moved out of the groove 11 of the pipe 1, and the pipe 1 can be quickly moved out of the connecting pipe 21, making the pipe disassembly faster and more convenient.

[0038] Furthermore, a slider 2311 is fixedly connected to one side of the push block 231, and the slider 2311 is slidably connected to the slide groove 2211. By connecting the slider 2311 in the slide groove 2211, the push block 231 can be slidably connected to the pipe sleeve seat 221, thereby limiting the moving distance of the push block 231, thereby ensuring that the conical clamp 241 can be stably clamped in the clamping groove 11 of the pipe 1.

[0039] Specifically disclosed, the clamping assembly 24 also includes a second ring 243 and a third ring 245. The second ring 243 is fixedly connected to the other end of the clamp mounting seat 242, and the third ring 245 is slidably connected in the second ring 243, and one end of the third ring 245 is fixedly connected to the other end of the extrusion block 244. The pipe 1 can be inserted into the connecting pipe 21 from the middle of the pushing block 231, and the pipe 1 passes through the movable ring 232, the third ring 245 and the extrusion block 244, and finally passes through the tapered clamp 241, and the tapered clamp 241 is squeezed to extend outward until the two pipes 1 are abutted against the middle of the connecting pipe 21. At this time, the tapered clamp 241 is clamped in the clamping groove 11 of the pipe 1, so that the pipe 1 is fixedly clamped in the connecting pipe 21, making the installation more convenient and quick, improving the pipe connection efficiency, and accelerating the construction progress.

[0040] Furthermore, the other end of the third ring 245 abuts against the movable ring 232, so that the movable ring 232 can drive the third ring 245 to move on the outer wall of the pipe 1 under the drive of the pushing block 231, and then drive the extrusion block 244 to move on the clamp mounting seat 242. The extrusion block 244 can squeeze the end of the conical clamp 241 out of the groove 11 of the pipe 1, so that the pipe 1 can be moved out of the connecting pipe 21.

[0041] Furthermore, the connecting unit 2 also includes a sealing component 25, which is arranged on one side of the limiting clamp seat 246. The sealing component 25 separates the connection of the pipeline 1 from the clamping component 24, which not only protects the clamping component 24 but also prevents leakage at the connection of the pipeline 1, thereby ensuring the airtightness of the connecting unit 2.

[0042] Specifically disclosed, the sealing assembly 25 includes a rubber sealing ring 251, a tightening spring 252 and a sealing seat 253. The rubber sealing ring 251 is sleeved on the sealing seat 253. The tightening spring 252 is arranged on the sealing seat 253, and the tightening spring 252 is pressed and connected with the rubber sealing ring 251. The sealing seat 253 is fixedly connected to the inner wall of the connecting pipe 21. By arranging sealing seats 253 on both sides of the connection of the pipeline 1, a tightening spring 252 is arranged in the sealing seat 253, and the rubber sealing ring 251 is sleeved on the sealing seat 253. When the pipeline 1 passes through the rubber sealing ring 251, the rubber sealing ring 251 is squeezed. At this time, the tightening spring 252 is tightened inwardly, so that the rubber sealing ring 251 is always in contact with the pipeline 1, which not only ensures that the connection of the pipeline 1 is not easy to leak, but also ensures that the rubber sealing ring 251 is always tightly pressed against the pipeline 1 during long-term use of the pipeline 1.

[0043] In practical applications, pipes of different diameters have different uses. For example, small-diameter pipes are often used for water and gas supply in homes and commercial buildings, while large-diameter pipes are mostly used for large-scale transportation in industrial and municipal engineering.

[0044] The selection of pipeline diameter should be determined according to the actual application scenario and needs to ensure the safety and economy of the pipeline system;

[0045] The diameter of a pipe is usually measured in millimeters (mm) or inches (inches), and different pipe materials and uses have different standard sizes.

[0046] The following are some common pipe diameter values ​​and their corresponding outer diameter and wall thickness:

[0047] Galvanized steel pipe

[0048] DN15: outer diameter 18mm, wall thickness 2.8mm, inner diameter approximately 12.4mm.

[0049] DN20: outer diameter 25mm, wall thickness 3.2mm, inner diameter approximately 18.6mm.

[0050] DN25: outer diameter 32mm, wall thickness 3.5mm, inner diameter approximately 25.0mm.

[0051] DN32: outer diameter 42.4mm, wall thickness 3.5mm, inner diameter approximately 35.4mm.

[0052] DN40: outer diameter 48.3mm, wall thickness 3.5mm, inner diameter approximately 41.3mm.

[0053] Stainless steel pipe

[0054] DN25: outer diameter 33.7mm, wall thickness 3.2mm, inner diameter approximately 27.3mm.

[0055] PVC pipe

[0056] DN32: outer diameter 42.4mm, wall thickness 3.5mm, inner diameter approximately 35.4mm.

[0057] DN40: outer diameter 48.3mm, wall thickness 3.5mm, inner diameter approximately 41.3mm.

[0058] Cast iron pipe

[0059] DN50: outer diameter 60.3mm, wall thickness 3.8mm, inner diameter approximately 52.7mm.

[0060] Copper Tube

[0061] DN50: outer diameter 60.3mm, wall thickness 3.8mm, inner diameter approximately 52.7mm.

[0062] In general, the caliber value of a pipe is determined by its nominal diameter, which is neither the outer diameter nor the inner diameter, but a standardized size between the two. Pipes of different materials and uses have different standard sizes and wall thicknesses. When selecting a pipe, it is necessary to determine the appropriate caliber value based on the actual application scenario and needs.

[0063] Furthermore, the pipe fittings can be used in temporary construction projects, water supply and drainage projects, and HVAC projects during construction:

[0064] In temporary construction projects, this pipe fitting can be used for the installation of domestic water and rainwater and sewage pipes, which can significantly simplify the installation process of pipes, save time and labor costs, improve the construction progress of temporary construction projects, reduce costs and increase efficiency, and facilitate the dismantling of temporary construction pipes in the later stage, and can recycle the dismantled pipes;

[0065] In water supply and drainage projects, the pipe fittings can be used to introduce public water sources into the water supply system of buildings or regions, transport water sources to various water use points, and connect booster pumps or pressure stabilizing equipment through pipelines as well as rainwater and sewage discharge. The use of the pipe fittings can greatly simplify the pipeline installation steps in the above construction process, reduce installation time and labor costs, and at the same time, the pipe fittings make the maintenance, replacement or inspection of pipelines faster, thereby speeding up the overall project progress;

[0066] In HVAC engineering, this pipe fitting can be used for hot water transportation and circulating heating in the heating system. The pipeline is responsible for transporting hot water from the boiler or heat source to each room of the building to achieve the purpose of heating. Through the circulation of the water pump, hot water continuously flows in the pipeline, thereby accelerating the heat transfer speed and improving the heating efficiency. In addition, this pipe fitting can also be used for the discharge of condensed water in the air-conditioning system. The use of this pipe fitting can greatly simplify the pipeline installation steps in the above construction process, speed up the construction progress, and facilitate the maintenance of the pipeline.

[0067] Working principle: first, insert the two pipes 1 into the connecting pipe 21 from both ends of the connecting pipe 21, and the pipe 1 enters from the middle of the pushing block 231. The pipe 1 passes through the movable ring 232, the third ring 245 and the extrusion block 244, and finally passes through the tapered clamp 241, and the tapered clamp 241 is squeezed to extend outward, and then passes through the limiting clamp seat 246 and the rubber sealing ring 251. The pipe 1 passes through the rubber sealing ring 251, and the rubber sealing ring 251 is squeezed. At this time, the tightening spring 252 is tightened inward, so that the rubber sealing ring 251 is always tightly against the pipe 1 until the two pipes 1 are connected. At this time, the tapered clamp 241 is clamped in the clamping groove 11 of the pipe 1, and then the two pipes 1 are clamped in the connecting pipe 21 to complete the installation.

[0068] When it is necessary to disassemble the pipeline 1, first loosen the fastening bolt 233 to make the pushing block 231 active, push the pushing block 231 to make the slider 2311 move in the pipe sleeve seat 221, and then drive the movable ring 232 to move into the pipe, and then drive the third ring 245 to move in the second ring 243, and then drive the squeezing block 244 to squeeze the conical clamp 241, so that the conical clamp 241 is moved out of the groove 11 of the pipeline 1, and then pull the pipeline 1 outward to take the pipeline 1 out of the connecting pipe 21 to complete the disassembly.

[0069] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipe fitting for easy installation and removal for civil engineering construction, comprising a pipe (1), characterized in that: A connecting unit (2) is installed on one side of the pipeline (1); The connecting unit (2) comprises a connecting tube (21), a sealing assembly (22), a pushing assembly (23) and a clamping assembly (24); the sealing assembly (22) is arranged on one side of the connecting tube (21), the pushing assembly (23) is arranged on the sealing assembly (22), and the clamping assembly (24) is arranged in the connecting tube (21); The clamping assembly (24) comprises a conical clamp (241), a clamp mounting seat (242), an extrusion block (244) and a limiting clamp seat (246); the conical clamp (241) is fixedly mounted on one end of the clamp mounting seat (242); the clamp mounting seat (242) is fixedly mounted on the inner wall of the connecting pipe (21); the extrusion block (244) is movably connected in the clamp mounting seat (242), and the extrusion block (244) is in abutment with the conical clamp (241); and the limiting clamp seat (246) is arranged on one side of the clamp mounting seat (242).

2. A pipe fitting for easy installation and removal for civil engineering construction according to claim 1, characterized in that: The pipe (1) is provided with a clamping groove (11), the end of the conical clamp (241) is clamped in the clamping groove (11), and the limiting clamp seat (246) is fixedly connected to the inner wall of the connecting pipe (21).

3. The pipe fitting for easy installation and removal for civil engineering construction according to claim 1, characterized in that: The sealing assembly (22) comprises a pipe sleeve seat (221) and a first sleeve ring (222); the pipe sleeve seat (221) is fixedly connected to one end of the first sleeve ring (222); the pipe sleeve seat (221) is provided with a sliding groove (2211); and the other end of the first sleeve ring (222) is inserted into the connecting pipe (21).

4. The pipe fitting for easy installation and removal for civil engineering construction according to claim 3, characterized in that: The pushing assembly (23) comprises a pushing block (231), a movable sleeve (232) and a fastening bolt (233); the pushing block (231) is movably arranged on one side of the pipe sleeve seat (221); the movable sleeve (232) is fixedly connected to the other side of the pushing block (231); the fastening bolt (233) is threadedly connected to the pushing block (231), and the bottom end of the fastening bolt (233) is in contact with the pipe sleeve seat (221).

5. The pipe fitting for easy installation and removal for civil engineering construction according to claim 4, characterized in that: A sliding block (2311) is fixedly connected to one side of the pushing block (231), and the sliding block (2311) is slidably connected to the sliding groove (2211).

6. The pipe fitting for easy installation and removal for civil engineering construction according to claim 1, characterized in that: The clamping assembly (24) further comprises a second ring (243) and a third ring (245), wherein the second ring (243) is fixedly connected to the other end of the clamp mounting seat (242), the third ring (245) is slidably connected in the second ring (243), and one end of the third ring (245) is fixedly connected to the other end of the extrusion block (244).

7. A pipe fitting for easy installation and removal for civil engineering construction according to claim 6, characterized in that: The other end of the third sleeve ring (245) is in contact with the movable sleeve ring (232).

8. The pipe fitting for easy installation and removal for civil engineering construction according to claim 1, characterized in that: The connection unit (2) further comprises a sealing assembly (25), wherein the sealing assembly (25) is arranged on one side of the limiting clamp seat (246).

9. The pipe fitting for easy installation and removal for civil engineering construction according to claim 8, characterized in that: The sealing assembly (25) comprises a rubber sealing ring (251), a tightening spring (252) and a sealing seat (253); the rubber sealing ring (251) is sleeved on the sealing seat (253); the tightening spring (252) is arranged on the sealing seat (253); the tightening spring (252) and the rubber sealing ring (251) are pressed against each other; and the sealing seat (253) is fixedly connected to the inner wall of the connecting pipe (21).

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