Concrete spraying device

Abstract

The utility model relates to a concrete spraying device which comprises a spraying main machine, a conveying pipeline and a spraying nozzle, one end of the conveying pipeline is connected with the spraying main machine in a sealed mode, and the spraying nozzle is detachably connected with the other end of the conveying pipeline through a quick-connection type pipeline connector assembly. The quick connection type pipeline connector assembly comprises a locking sleeve and a clamping sleeve. The front end of the locking sleeve is provided with a connecting part in threaded fit with the jet nozzle, the rear end of the locking sleeve is a guide part, and the outer wall of the guide part forms a conical guide surface; the inner side face of the clamping sleeve is matched with the conical guide face of the locking sleeve, radial clamping force is generated between the clamping sleeve and the conical guide face by axially pressing the clamping sleeve, and the end of the conveying pipeline is clamped and fixed in the radial direction. The utility model provides a concrete spraying device, which solves the technical problems in the prior art that the disassembly and assembly efficiency is low, the sealing reliability is poor and the clamping force is easy to attenuate by improving the structural design of a quick-connection type pipeline joint assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to building engineering machinery technical field, concretely relates to a concrete injection device, especially concrete injection device with quick -witted pipe joint subassembly. BACKGROUND

[0002] In the field of building construction, tunnel engineering, concrete injection operation is a common and important construction technology. The existing concrete injection device has some deficiencies in the actual use. For example, the connection mode between the injection nozzle and the conveying pipeline is often not convenient, when the nozzle needs to be replaced, the operation is cumbersome, a large amount of time is consumed, and the construction efficiency is affected. At the same time, the traditional connection structure performs poorly in sealing and stability, and in the process of high-pressure injection operation, material leakage and connection part loosening problems are prone to occur, which not only causes material waste, but also may affect construction quality and safety. In addition, the existing device has poor adaptability when dealing with conveying pipelines of different diameters, and lacks a structure that can be flexibly adapted and reliably connected. Therefore, it is necessary to develop a new type of concrete injection device to solve the problems existing in the prior art. SUMMARY

[0003] Therefore, the utility model provides a concrete injection device, through the structure design of quick -witted pipe joint subassembly, solves the technical problem of low dismounting efficiency, poor sealing reliability and easy attenuation of clamping force in prior art.

[0004] The purpose of the utility model is realized through the following technical schemes:

[0005] A concrete injection device, comprising a spraying host, a conveying pipeline and a spraying nozzle, the spraying host is provided with a discharge port, one end of the conveying pipeline is sealingly connected with the discharge port of the spraying host, and the spraying nozzle is detachably connected with the other end of the conveying pipeline through a quick -witted pipe joint subassembly;The quick -witted pipe joint subassembly comprises a locking sleeve and a clamping sleeve;The front end of the locking sleeve is provided with a connecting part matched with the spraying nozzle in screw thread, the rear end is a guide part, and the outer wall of the guide part forms a tapered guide surface;The inner side surface of the clamping sleeve is matched with the tapered guide surface of the locking sleeve, the radial clamping force between the clamping sleeve and the tapered guide surface is generated by axially compressing the clamping sleeve, and the end of the conveying pipeline is clamped and fixed radially.

[0006] The quick-connection pipe joint assembly is a key innovative part of the device and has unique and important advantages. The assembly includes a locking sleeve and a clamping sleeve. The front end of the locking sleeve is provided with a connecting part that is threadedly connected with the spraying nozzle. This threadedly connected manner provides a reliable and stable connection structure, which can ensure that the spraying nozzle and the locking sleeve are not easily loosened or separated during high-pressure concrete spraying operation, thereby ensuring the continuity and stability of the spraying operation. Meanwhile, the outer wall of the rear end of the locking sleeve forms a conical guide surface, and the inner surface of the clamping sleeve is matched with the conical guide surface. By axially pressing the clamping sleeve, the special geometric structure of the conical guide surface causes the clamping sleeve and the conical guide surface to generate a radial clamping force, thereby radially clamping and fixing the end of the conveying pipeline. Compared with the traditional connection method, this design based on the conical guide surface generates a radial clamping force, has a stronger clamping effect, can adapt to conveying pipelines of different diameters, and can still maintain good sealing and connection stability when bearing a larger pressure, effectively preventing the conveying pipeline from falling off or leaking under high pressure, and improving the reliability and safety of the entire concrete spraying device. When the spraying nozzle has problems such as wear and blockage, it can be quickly disassembled and replaced without complex operations, thereby effectively shortening the equipment downtime maintenance time, improving the construction efficiency, and reducing the risk of project delay caused by equipment failure.

[0007] Preferably, the rear end of the locking sleeve is provided with a cylindrical locking part, and the clamping sleeve is connected with a locking bolt, and the end of the locking bolt abuts against the surface of the cylindrical locking part.

[0008] During the operation of the device, due to the vibration and impact force generated by the concrete spraying, only the radial clamping force between the clamping sleeve and the conical guide surface may not be enough to completely prevent the loosening of the conveying pipeline. The cooperation of the cylindrical locking part and the locking bolt can limit the clamping sleeve in the axial direction, ensuring that the clamping sleeve always maintains an effective clamping state of the conveying pipeline. By tightening the locking bolt, the end thereof is tightly abutted against the outer surface of the cylindrical locking part, increasing the stability and reliability of the connection structure, effectively avoiding the loosening of the clamping sleeve due to vibration and other factors, and further improving the safety and stability of the entire device during long-term operation. It should be noted that when the conveying pipeline is connected to the quick-connection joint, the end of the locking bolt is tightly abutted against the outer surface of the conveying pipeline, and the inner surface of the conveying pipeline is attached to the outer surface of the cylindrical locking part.

[0009] Preferably, the guide part is internally provided with a first magnet, and the clamping sleeve is provided with a second magnet that is magnetically attracted to the first magnet.

[0010] The innovative magnet design brings many benefits to the quick-connection pipe joint assembly. First, during installation, the mutual attraction between the first magnet and the second magnet can automatically guide the clamping sleeve to accurately cooperate with the conical guide surface, greatly improving the convenience and accuracy of installation, reducing the difficulty and time cost of manual alignment. Second, during operation of the device, the magnetic attraction can assist the radial clamping force between the clamping sleeve and the conical guide surface, further enhancing the clamping effect on the conveying pipeline, especially in the face of sudden pressure fluctuations or vibrations, the magnetic attraction can play a role in stabilizing the connection structure, preventing accidental loosening or falling of the conveying pipeline, and improving the anti-interference ability and operation stability of the entire device. In addition, the setting of the magnet also has a certain positioning function, ensuring the accurate position of the clamping sleeve on the conical guide surface, which is beneficial to ensuring the sealing and reliability of the connection structure.

[0011] Preferably, the shape of the clamping sleeve is cylindrical.

[0012] The cylindrical structure is easy to process and manufacture, can ensure high dimensional accuracy and surface quality, and reduce production cost and manufacturing difficulty. At the same time, when the cylindrical clamping sleeve cooperates with the conical guide surface of the locking sleeve, it can provide uniform radial clamping force distribution, so that the end of the conveying pipeline is subjected to uniform clamping force in the circumferential direction, avoiding pipeline deformation or damage caused by uneven local stress.

[0013] Preferably, the outer wall of the conical guide surface is circumferentially distributed with guide ribs, and the inner wall of the clamping sleeve is provided with guide grooves in sliding cooperation with the guide ribs.

[0014] During installation, the sliding cooperation of the guide ribs and the guide grooves can guide the clamping sleeve to move axially in the correct direction, ensuring that the clamping sleeve accurately fits the conical guide surface, avoiding problems such as loose clamping or poor sealing caused by installation angle deviation. At the same time, during operation of the device, the cooperation of the guide ribs and the guide grooves can limit the circumferential rotation of the clamping sleeve, ensuring that the clamping sleeve is always in the correct position, maintaining stable radial clamping force, improving the stability and reliability of the connection structure. In addition, this guide structure can also buffer the stress caused by vibration or impact to some extent, prolonging the service life of the quick-connection pipe joint assembly.

[0015] Preferably, the inner side of the clamping sleeve is provided with an annular sealing groove, and an elastic sealing ring is embedded in the annular sealing groove.

[0016] The elastic sealing ring can tightly fit the outer wall of the conveying pipeline after being extruded in the annular sealing groove, forming an effective sealing barrier to prevent concrete slurry from leaking from the connection between the conveying pipeline and the clamping sleeve during the conveying process. The elastic property of the elastic sealing ring enables it to adapt to the slight deformation of the conveying pipeline under different working conditions, and always maintain good sealing performance. Even if the elastic sealing ring is worn to some extent after long-term use, its own elasticity can still ensure the sealing effect, reduce the risk of material leakage and equipment damage due to sealing failure, improve the operation stability and reliability of the entire device, and also help protect the environment and prevent concrete slurry from polluting the surrounding environment.

[0017] Preferably, the end surface of the conveying pipeline is covered with a corrugated reinforcing layer, and the wave crests of the corrugated reinforcing layer are mutually embedded with the guide chute.

[0018] The corrugated reinforcing layer can effectively disperse the stress generated by the conveying pipeline when subjected to pressure, improve the pressure resistance of the pipeline end, and reduce the risk of pipeline rupture or damage caused by high pressure. At the same time, the wave crests of the corrugated reinforcing layer are mutually embedded with the guide chute, which can provide additional positioning and fixing during installation, ensuring that the conveying pipeline is accurately installed in the clamping sleeve and well matched with the conical guide surface. During device operation, this embedded structure can enhance the friction between the conveying pipeline and the clamping sleeve, further improving the stability of the connection and preventing the conveying pipeline from sliding or displacing in the clamping sleeve, thereby ensuring the normal operation of the entire concrete injection device.

[0019] Preferably, the surface of the cylindrical locking portion is provided with anti-skid lines, and the end of the locking bolt is provided with a friction protrusion engaged with the anti-skid lines.

[0020] The mutual engagement of the anti-skid lines and the friction protrusion can provide greater friction when tightening the locking bolt, preventing the locking bolt from loosening due to vibration or external forces during device operation. This anti-skid and anti-looseness design effectively improves the reliability of the entire quick-connect pipe joint assembly, ensuring that the clamping sleeve always maintains a firm clamping state on the conveying pipeline, avoiding connection failure and safety hazards caused by loosening of the locking bolt, and ensuring stable operation of the concrete injection device under various complex working conditions.

[0021] The beneficial effects of the present utility model compared to the prior art are:

[0022] The concrete injection device of the present utility model improves the structure design of the quick-connect pipe joint assembly, solving the technical problems of low disassembly and assembly efficiency, poor sealing reliability, and easy decay of clamping force in the prior art.

[0023] The quick-connection type pipe joint assembly is a key innovative part of the device and has unique and important advantages. The assembly includes a locking sleeve and a clamping sleeve. A connecting part that is threadedly connected with the spraying nozzle is arranged at the front end of the locking sleeve. This threadedly connected mode provides a reliable and stable connection structure, which can ensure that the spraying nozzle and the locking sleeve are not easily loosened or separated during high-pressure concrete spraying operation, thereby ensuring the continuity and stability of the spraying operation. Meanwhile, a tapered guide surface is formed on the outer wall of the rear end of the locking sleeve, and the inner surface of the clamping sleeve is matched with the tapered guide surface. By axially pressing the clamping sleeve, the special geometric structure of the tapered guide surface enables the clamping sleeve and the tapered guide surface to generate a radial clamping force, and the end of the conveying pipeline is radially clamped and fixed. Compared with the traditional connection mode, this design based on the tapered guide surface generates a radial clamping force, has a stronger clamping effect, can adapt to conveying pipelines with different diameters, and can still maintain good sealing and connection stability when bearing a larger pressure, effectively preventing the conveying pipeline from falling off or leaking under high pressure, and improving the reliability and safety of the entire concrete spraying device. When the spraying nozzle is worn, blocked or has other problems, the new nozzle can be quickly disassembled and replaced without complex operation, thereby effectively shortening the equipment downtime maintenance time, improving the construction efficiency, and reducing the risk of project delay caused by equipment failure. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0025] Figure 1 It is a cross-sectional view of the quick-connection type pipe joint assembly of an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional view of the quick-connection type pipe joint assembly of an embodiment of the present application.

[0027] Figure 3 It is a cooperation schematic view of the guide protrusions and the guide sliding grooves of an embodiment of the present application.

[0028] Figure 4 It is a cooperation schematic view of the anti-skid lines and the friction protrusions of an embodiment of the present application.

[0029] Figure 5 It is a structural schematic view of the concrete spraying device of an embodiment of the present application.

[0030] Label explanation:

[0031] Ejection host (1)

[0032] Delivery pipeline (2)

[0033] Ejection nozzle (3)

[0034] Quick-connect pipe joint assembly (4)

[0035] Locking sleeve (41)

[0036] Connecting portion (411)

[0037] Conical guide surface (412)

[0038] Clamping sleeve (42)

[0039] Cylindrical locking portion (413)

[0040] Locking bolt (414)

[0041] First magnet (415)

[0042] Second magnet (416)

[0043] Guide protrusion (417)

[0044] Guide slide (418)

[0045] Annular sealing groove (419)

[0046] Elastic sealing ring (420)

[0047] Ripple-shaped reinforcing layer (421)

[0048] Anti-slip pattern (422)

[0049] Friction protrusion (423) DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0052] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like are words of convenience and are not to be construed as limiting terms unless otherwise indicated by the context. These terms merely identify the orientation in use or normal position of the present application as shown in the drawings or as commonly understood by one of ordinary skill in the art, and thus are intended to embrace different orientations of the present application and its alternatives and equivalents. Therefore, these terms do not limit the scope of the present application and are not intended to exclude other orientations from the scope of the present application.

[0053] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0054] The technical solutions in the present application will be described below in conjunction with the drawings.

[0055] The present embodiment provides a concrete spraying device, comprising a spraying host 1, a conveying pipeline 2 and a spraying nozzle 3, the spraying host 1 is provided with a discharge port, one end of the conveying pipeline 2 is sealingly connected with the discharge port of the spraying host 1, and the spraying nozzle 3 is detachably connected with the other end of the conveying pipeline 2 through a quick-connection type pipeline joint assembly 4; the quick-connection type pipeline joint assembly 4 comprises a locking sleeve 41 and a clamping sleeve 42; the front end of the locking sleeve 41 is provided with a connecting part 411 which is threadedly matched with the spraying nozzle 3, and the outer wall of the rear end of the locking sleeve 41 forms a tapered guide surface 412; the inner side surface of the clamping sleeve 42 is matched with the tapered guide surface 412 of the locking sleeve 41, and the radial clamping force between the clamping sleeve 42 and the tapered guide surface 412 is generated by axially compressing the clamping sleeve 42, so that the end part of the conveying pipeline 2 is radially clamped and fixed.

[0056] The quick-connection pipe joint assembly 4 is a key innovative part of the device and has unique and important advantages. The assembly includes a locking sleeve 41 and a clamping sleeve 42. The front end of the locking sleeve 41 is provided with a connecting part 411 that is threadedly connected with the spraying nozzle 3. This threadedly connected structure provides reliable and stable connection, which can ensure that the spraying nozzle 3 and the locking sleeve 41 are not easily loosened or separated during high-pressure concrete spraying operation, thereby ensuring the continuity and stability of the spraying operation. Meanwhile, the outer wall of the rear end of the locking sleeve 41 forms a tapered guide surface 412, and the inner side of the clamping sleeve 42 is matched with the tapered guide surface 412. By axially pressing the clamping sleeve 42, the special geometric structure of the tapered guide surface 412 causes the clamping sleeve 42 and the tapered guide surface 412 to generate a radial clamping force, thereby radially clamping and fixing the end of the delivery pipeline 2. Compared with the traditional connection method, this design based on the tapered guide surface 412 generates a radial clamping force, which has a stronger clamping effect, can adapt to delivery pipelines 2 of different diameters, and can still maintain good sealing and connection stability when bearing a larger pressure, effectively preventing the delivery pipeline 2 from falling off or leaking under high pressure, and improving the reliability and safety of the entire concrete spraying device. When the spraying nozzle 3 is worn, blocked, or has other problems, it can be quickly disassembled and replaced without complex operations, thereby effectively shortening the equipment downtime maintenance time, improving the construction efficiency, and reducing the risk of project delay caused by equipment failure.

[0057] In this embodiment, the rear end of the locking sleeve 41 is provided with a cylindrical locking part 413, and the clamping sleeve 42 is connected with a locking bolt 414, the end of which abuts against the surface of the cylindrical locking part 413.

[0058] During the operation of the device, due to the vibration and impact force generated by the concrete spraying, the radial clamping force between the clamping sleeve 42 and the tapered guide surface 412 may not be enough to completely prevent the loosening of the delivery pipeline 2. The cooperation of the cylindrical locking part 413 and the locking bolt 414 can limit the clamping sleeve 42 in the axial direction, ensuring that the clamping sleeve 42 always maintains an effective clamping state on the delivery pipeline 2. By tightening the locking bolt 414, its end tightly abuts against the outer surface of the cylindrical locking part 413, increasing the stability and reliability of the connection structure, effectively preventing the loosening of the clamping sleeve 42 due to vibration and other factors, and further improving the safety and stability of the entire device during long-term operation. It should be noted that when the delivery pipeline 2 is connected to the quick-connection joint, the end of the locking bolt 414 tightly abuts against the outer surface of the delivery pipeline 2, and the inner surface of the delivery pipeline 2 is in contact with the outer surface of the cylindrical locking part 413.

[0059] In this embodiment, the tapered guide surface 412 is internally provided with a first magnet 415, and the clamping sleeve 42 is provided with a second magnet 416 that is magnetically attracted to the first magnet 415.

[0060] This innovative magnet design brings many benefits to the quick-connect pipe joint assembly 4. First, during installation, the mutual attraction between the first magnet 415 and the second magnet 416 can automatically guide the clamping sleeve 42 to accurately cooperate with the tapered guide surface 412, greatly improving the convenience and accuracy of installation, reducing the difficulty and time cost of manual alignment. Second, during operation of the device, the magnetic attraction can assist the radial clamping force between the clamping sleeve 42 and the tapered guide surface 412, further enhancing the clamping effect on the conveying pipeline 2. Especially in the face of sudden pressure fluctuations or vibrations, the magnetic attraction can play a role in stabilizing the connection structure, preventing the conveying pipeline 2 from accidentally loosening or falling off, and improving the anti-interference ability and operation stability of the entire device. In addition, the setting of the magnet also has a certain positioning function, ensuring the accurate position of the clamping sleeve 42 on the tapered guide surface 412, which is beneficial to ensuring the sealing and reliability of the connection structure.

[0061] In this embodiment, the clamping sleeve 42 is cylindrical in shape.

[0062] The cylindrical structure is easy to process and manufacture, can ensure high dimensional accuracy and surface quality, and reduces production cost and manufacturing difficulty. At the same time, when the cylindrical clamping sleeve 42 cooperates with the tapered guide surface 412 of the locking sleeve 41, it can provide uniform radial clamping force distribution, so that the end of the conveying pipeline 2 is subjected to uniform clamping force in the circumferential direction, avoiding pipeline deformation or damage caused by uneven local stress.

[0063] In this embodiment, the outer wall of the tapered guide surface 412 is circumferentially provided with guide ribs 417, and the inner wall of the clamping sleeve 42 is provided with guide grooves 418 that slide with the guide ribs 417.

[0064] During installation, the sliding cooperation of the guide ribs 417 and the guide grooves 418 can guide the clamping sleeve 42 to move axially in the correct direction, ensuring that the clamping sleeve 42 accurately fits the tapered guide surface 412, avoiding problems such as loose clamping or poor sealing caused by installation angle deviation. At the same time, during operation of the device, the cooperation of the guide ribs 417 and the guide grooves 418 can limit the circumferential rotation of the clamping sleeve 42, ensuring that the clamping sleeve 42 is always in the correct position, maintaining stable radial clamping force, and improving the stability and reliability of the connection structure. In addition, this guide structure can also buffer stress caused by vibration or impact to some extent, prolonging the service life of the quick-connect pipe joint assembly 4.

[0065] In this embodiment, the inside of the clamping sleeve 42 is provided with an annular sealing groove 419, and an elastic sealing ring 420 is embedded in the annular sealing groove 419.

[0066] After the elastic sealing ring 420 is extruded in the annular sealing groove 419, it can tightly fit the outer wall of the conveying pipeline 2 to form an effective sealing barrier, preventing concrete slurry from leaking between the conveying pipeline 2 and the clamping sleeve 42 during transportation. The elastic properties of the elastic sealing ring 420 allow it to adapt to the slight deformation of the conveying pipeline 2 under different working conditions, ensuring good sealing performance at all times. Even if the elastic sealing ring 420 is worn to some extent after long-term use, its own elasticity can still ensure the sealing effect, reducing the risk of material leakage and equipment damage due to sealing failure, improving the operational stability and reliability of the entire device, while also helping to protect the environment and prevent concrete slurry from polluting the surrounding environment.

[0067] In this embodiment, the end surface of the conveying pipeline 2 is covered with a corrugated reinforcing layer 421, and the peaks of the corrugated reinforcing layer 421 are embedded with the guide chute 418.

[0068] The corrugated reinforcing layer 421 can effectively disperse the stress generated by the conveying pipeline 2 when subjected to pressure, improving the pressure resistance of the pipeline end and reducing the risk of pipeline rupture or damage caused by high pressure. At the same time, the peaks of the corrugated reinforcing layer 421 are embedded with the guide chute 418, providing additional positioning and fixing during installation to ensure that the conveying pipeline 2 is accurately installed within the clamping sleeve 42 and properly cooperates with the conical guide surface 412. During device operation, this embedded structure can enhance the friction between the conveying pipeline 2 and the clamping sleeve 42, further improving the stability of the connection and preventing the conveying pipeline 2 from sliding or shifting within the clamping sleeve 42, thereby ensuring the normal operation of the entire concrete injection device.

[0069] In this embodiment, the surface of the cylindrical locking portion 413 is provided with anti-slip lines 422, and the end of the locking bolt 414 is provided with friction protrusions 423 that engage with the anti-slip lines 422.

[0070] The engagement of the anti-slip lines 422 and the friction protrusions 423 can provide greater friction when tightening the locking bolt 414, preventing the locking bolt 414 from loosening due to vibration or external forces during device operation. This anti-slip and anti-looseness design effectively improves the reliability of the entire quick-connect pipe joint assembly 4, ensuring that the clamping sleeve 42 always maintains a firm clamping state on the conveying pipeline 2, avoiding connection failure and safety hazards caused by loosening of the locking bolt 414, and ensuring stable operation of the concrete injection device under various complex working conditions.

[0071] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete spraying apparatus, characterised in that, Comprising a jet host (1) provided with a discharge port; a conveying pipeline (2) having one end connected to the discharge port of the jet host (1) in a sealed manner; a jet nozzle (3) detachably connected to the other end of the conveying pipeline (2) through a quick-connection pipe joint assembly (4); the quick-connection pipe joint assembly (4) comprises: a locking sleeve (41) having a connecting part (411) at the front end thereof for threaded connection with the jet nozzle (3) and a guiding part at the rear end thereof, the outer wall of the guiding part forming a tapered guiding surface (412); a clamping sleeve (42) having an inner side surface matched with the tapered guiding surface (412) of the locking sleeve (41), the clamping sleeve (42) being axially pressed to generate a radial clamping force between the clamping sleeve (42) and the tapered guiding surface (412) to radially clamp and fix the end of the conveying pipeline (2).

2. The concrete injection apparatus of claim 1, wherein the rear end of the locking sleeve (41) is provided with a cylindrical locking part (413), the clamping sleeve (42) is connected with a locking bolt (414), and the end of the locking bolt (414) abuts against the surface of the cylindrical locking part (413).

3. The concrete injection apparatus of claim 1, wherein the guiding part is internally provided with a first magnet (415), and the clamping sleeve (42) is provided with a second magnet (416) magnetically attracted to the first magnet (415).

4. The concrete injection apparatus of claim 1, wherein the clamping sleeve (42) is in the shape of a cylinder.

5. The concrete injection apparatus of claim 1, wherein the outer wall of the tapered guiding surface (412) is circumferentially provided with guiding convex ribs (417), and the inner wall of the clamping sleeve (42) is provided with guiding sliding grooves (418) slidably matched with the guiding convex ribs (417).

6. The concrete injection apparatus of claim 1, wherein the inner side of the clamping sleeve (42) is provided with an annular sealing groove (419) in which an elastic sealing ring (420) is embedded.

7. The concrete injection apparatus of claim 5, wherein the end of the conveying pipeline (2) is covered with a corrugated reinforcing layer (421), and the wave crests of the corrugated reinforcing layer (421) are embedded with the guiding sliding grooves (418).

8. The concrete injection apparatus of claim 2, wherein the surface of the cylindrical locking part (413) is provided with an anti-skid pattern (422), and the end of the locking bolt (414) is provided with a friction protrusion (423) engaged with the anti-skid pattern (422).

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