Microcapsule injector for self-repairing concrete cracks

Abstract

The utility model discloses a microcapsule injector for self-repairing concrete cracks, which relates to the technical field of building repair construction, and comprises an injector main body provided with a liquid source interface and an injection pipeline, the injection pipeline is arranged along the axial direction of the injector main body, and the injection pipeline is communicated with the liquid source interface; the conveying pipe comprises a pipe shell, a microcapsule repairing agent pipeline, a curing agent pipeline and a quick release connector, the microcapsule repairing agent pipeline and the curing agent pipeline are sleeved with the pipe shell, a spiral groove is further formed in the inner wall of the microcapsule repairing agent pipeline, and the liquid source connector communicates with the microcapsule repairing agent pipeline and the curing agent pipeline through an injection pipeline; the tube shell is detachably connected with the injector main body; the mixing head comprises a mixing head shell, a spiral flow deflector group and a connecting interface. The external microcapsule repairing agent and the curing agent are mixed and then injected into the crack, so that the concrete crack is repaired, and meanwhile, the concrete crack is mixed while being used, and the equipment is prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of building repair and construction technology, and in particular to a microcapsule injector for self-healing concrete cracks. Background Technology

[0002] Concrete is the most widely used man-made building material in the world today, and it is widely used in bridges, houses, railways and other projects. Concrete is characterized by its compressive strength but not tensile strength. Its drying shrinkage, autogenous shrinkage, temperature shrinkage, plastic shrinkage and external force constraints can all cause concrete to develop cracks. The presence of cracks will affect the structural safety, service life and functionality of concrete.

[0003] Traditional crack repair methods involve manual labor, but due to the highly alkaline environment of concrete, direct manual repair is ineffective. With advancements in technology, microencapsulation technology has matured, enabling self-healing effects by incorporating microcapsules into concrete during production. When cracks occur, the microcapsules rupture through chemical or physical processes, releasing their internal active ingredients to effectively repair the cracks. However, this technology can only be applied during concrete production and is difficult to use with existing, hardened concrete.

[0004] Therefore, there is a need for an injector that can act on microcapsules in hardened concrete cracks. Utility Model Content

[0005] The main purpose of this invention is to provide a microcapsule injector for self-healing concrete cracks, which aims to solve the problem that existing concrete microcapsules cannot be applied to cured concrete.

[0006] To achieve the above objectives, the present invention proposes a microcapsule injector for self-healing concrete cracks, comprising:

[0007] The injector body is provided with a liquid source interface and an injection pipeline. The liquid source interface is located at one end of the injector body, and the injection pipeline is arranged along the axial direction of the injector body and is connected to the liquid source interface.

[0008] The delivery tube includes a shell, a microcapsule repair agent conduit, a curing agent conduit, and a quick-release interface. The shell is fitted over the microcapsule repair agent conduit and the curing agent conduit. The microcapsule repair agent conduit and the curing agent conduit are arranged parallel to each other and spaced apart. The inner wall of the microcapsule repair agent conduit is also provided with a spiral groove, which extends along the axial direction of the microcapsule repair agent conduit. The liquid source interface is connected to the microcapsule repair agent conduit and the curing agent conduit through the injection pipeline. The quick-release interface is located on one end of the shell near the injector body, and the shell is detachably connected to the injector body through the quick-release interface.

[0009] A mixing head includes a mixing head housing, a spiral guide vane assembly, and a connecting interface. A mixing chamber is formed inside the mixing head housing. The spiral guide vane assembly is arranged circumferentially along the inner wall of the mixing head housing. The connecting interface is disposed in the mixing head housing and detachably connected to the delivery pipe.

[0010] Preferably, the spiral guide vane group further includes a first guide vane group and a second guide vane group, the first guide vane group and the second guide vane group being arranged sequentially along the axial direction of the mixing chamber, the first guide vane group being disposed in the mixing chamber near one end of the conveying pipe, the inclination angle of the first guide vane group being 30°±5°, the inclination angle of the second guide vane group being 15°±5°, the inclination angle being the angle between the guide vane and the axis of the mixing chamber.

[0011] Preferably, the mixing head further includes a locking mechanism, which includes a rotating locking ring and a buckle. The buckle is disposed on the outer wall of the connection interface, and the tube shell has a slot corresponding to the position of the buckle. The buckle is engaged with the slot. The rotating locking ring is sleeved on the connection interface, and the inner wall of the rotating locking ring has a locking groove. The tube shell has a tenon corresponding to the locking groove. The tenon is fixed by rotating around the circumference of the rotating locking ring and embedding it into the locking groove.

[0012] Preferably, the locking groove is L-shaped, and there are multiple locking grooves. The multiple locking grooves are evenly spaced on the rotating locking ring, and the number of the latches corresponds to the locking grooves and is evenly distributed on the tube shell.

[0013] Preferably, the depth of the spiral groove is 0.5~1mm, and the pitch is 1 / 3~1 / 2 of the inner diameter of the microcapsule repair agent channel.

[0014] Preferably, the injector body further includes a switching valve assembly, which includes a gate and an opening / closing element. The opening / closing element is disposed on the top of the injector body and is connected to the gate. The gate is rotatably disposed within the injection pipeline.

[0015] Preferably, the injector body includes a flow rate sensor and a display screen. There are multiple flow rate sensors, which are respectively disposed in the microcapsule repair agent channel and the curing agent channel. The flow rate sensors are signal connected to the display screen, which is disposed at the top of the injector body.

[0016] This invention relates to a microcapsule injector for self-healing concrete cracks. The injector body, which is equipped with a liquid source interface and an injection pipeline, transmits the microcapsule repair agent and curing agent to the delivery pipe and mixing head in sequence. The independently set microcapsule repair agent pipeline and curing agent pipeline, together with the mixing head, can repair the cured concrete cracks. At the same time, this invention has a simple structure and reduces production and maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a microcapsule injector for self-healing concrete cracks according to an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural diagram of the conveying pipe according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a mixing head according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional structural diagram of a mixing head according to an embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional structural diagram of the injector body according to an embodiment of the present invention.

[0023] Explanation of icon numbers:

[0024] label name label name 1000 Microcapsule injector for self-healing concrete cracks 100 Injector body 110 Liquid source interface 120 Injection pipeline 130 Flow rate sensor 140 Display screen 200 delivery pipe 210 Tube shell 211 Card slot 212 Clamp 220 Microcapsule repair agent pipeline 221 Spiral Groove 230 Curing agent pipeline 240 quick-release interface 300 Mixing head 310 Mixing head housing 320 Spiral guide vane assembly 321 First guide vane group 322 Second guide vane group 330 Connection interface 340 Locking mechanism 341 Rotary locking ring 342 Buckle 343 Locking groove 400 Switch valve assembly 410 gate 420 Opening and closing components

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Currently, microencapsulation technology containing repair agents is gradually being applied in the field of self-healing concrete. However, existing self-healing concrete typically incorporates microcapsules containing repair agents into the concrete during the production process. During use, if cracks appear in the concrete, the microcapsules rupture, releasing the repair agent. This agent reacts with components in the surrounding environment to form a cementitious material, which then fills the crack. However, when faced with cracks in already cured concrete, such as large cracks, deactivated repair agents, or cracks without added microcapsules, it is difficult to repair the concrete. Therefore, a device is needed to repair cracks in these cured concrete sections.

[0030] Based on this, the present invention proposes a microcapsule injector 1000 for self-healing concrete cracks, comprising: an injector body 100, the injector body 100 having a liquid source interface 110 and an injection pipeline 120, the liquid source interface 110 being disposed at one end of the injector body 100, the injection pipeline 120 being disposed along the axial direction of the injector body 100 and communicating with the liquid source interface 110; and a delivery pipe 200, the delivery pipe 200 including a pipe shell 210, a microcapsule repair agent pipeline 220, a curing agent pipeline 230, and a quick-release interface 240, the pipe shell 210 being sleeved outside the microcapsule repair agent pipeline 220 and the curing agent pipeline 230, the microcapsule repair agent pipeline 220 and the curing agent pipeline 230 being arranged parallel and spaced apart, the microcapsule repair agent pipeline 220... The inner wall is also provided with a spiral groove 221, which extends along the axial direction of the microcapsule repair agent pipeline 220. The liquid source interface 110 is connected to the microcapsule repair agent pipeline 220 and the curing agent pipeline 230 through the injection pipeline 120. The quick-release interface 240 is provided on the end of the tube shell 210 near the injector body 100. The tube shell 210 is detachably connected to the injector body 100 through the quick-release interface 240. The mixing head 300 includes a mixing head shell 310, a spiral guide vane group 320, and a connection interface 330. A mixing chamber is formed inside the mixing head shell 310. The spiral guide vane group 320 is arranged circumferentially along the inner wall of the mixing head shell 310. The connection interface 330 is provided on the mixing head shell 310 and is detachably connected to the delivery pipe 200.

[0031] In this embodiment, as Figures 1-5 As shown, a nozzle is provided on the side of the mixing head 300 away from the delivery pipe 200, and the mixed concrete repair liquid is sprayed out from the nozzle. The inner walls of the microcapsule repair agent pipe 220 and the hardener pipe 230 are both coated with polytetrafluoroethylene to reduce frictional resistance. The injection pipe 120 is divided into a microcapsule repair agent pipe and a hardener pipe, and the two pipes are set independently and alternately. The number of liquid source interfaces 110 corresponds to the number of injection pipes 120. Both liquid source interfaces 110 are located on the top of the injector body 100 and are respectively connected to the external microcapsule repair agent and curing agent. The external microcapsule repair agent and curing agent liquid source are pumped into the injector body by a pump. The microcapsule repair agent and curing agent enter the mixing chamber through the injection pipe 120, the microcapsule repair agent pipe 220 or the curing agent pipe 230 in sequence. The microcapsule repair agent pipe 220 and the curing agent are mixed by the spiral guide plate group 320 in the mixing chamber. Then, it is sprayed out from the mixing head 300 and applied to the concrete crack. The microcapsules are broken through chemical or physical changes. The repair liquid and the curing agent work together to repair the concrete crack.

[0032] In one embodiment, the spiral guide vane group 320 further includes a first guide vane group 321 and a second guide vane group 322. The first guide vane group 321 and the second guide vane group 322 are arranged sequentially along the axial direction of the mixing chamber. The first guide vane group 321 is disposed in the mixing chamber near one end of the conveying pipe 200. The tilt angle of the first guide vane group 321 is 30°±5°, and the tilt angle of the second guide vane group 322 is 15°±5°. The tilt angle is the angle between the guide vane and the axis of the mixing chamber.

[0033] In this embodiment, the first guide vane group 321 is a coarse mixing zone, equipped with four groups of first guide vanes. The inclination angle of the first guide vanes is 30°±5°. Strong swirling flow is generated by the first guide vanes to disperse the fluids of the microcapsule repair agent and curing agent, premixing them to prevent clumping and agglomeration. Simultaneously, the larger gaps reduce the contact probability between the microcapsules and the first guide vanes, lowering the microcapsule breakage rate. The second guide vane group 322 is a fine mixing zone, equipped with eight groups of second guide vanes. The inclination angle of the second guide vanes is 15°±5°. The smaller inclination angle of the second guide vane group 322 extends the fluid mixing path, promoting the mixing of the curing agent and the microcapsule repair agent, while also disrupting the laminar sublayer. The first guide vanes have a trapezoidal cross-section, and the second guide vanes have a streamlined cross-section. Both the first guide vane group 321 and the second guide vane group 322 are welded to the inner side of the mixing head housing 310. This tiered arrangement of guide vanes balances mixing efficiency and microcapsule integrity.

[0034] In one embodiment, the mixing head 300 further includes a locking mechanism 340, which includes a rotating locking ring 341 and a buckle 342. The buckle 342 is disposed on the outer wall of the connecting interface 330, and the tube shell 210 is provided with a slot 211 corresponding to the position of the buckle 342. The buckle 342 is engaged with the slot 211. The rotating locking ring 341 is sleeved on the connecting interface 330, and the inner wall of the rotating locking ring 341 is provided with a locking groove 343. The tube shell 210 is provided with a tenon 212 corresponding to the locking groove 343. The tenon 212 is fixed by rotating around the circumference of the rotating locking ring 341 and embedding it into the locking groove 343.

[0035] In this embodiment, there are two buckles 342. The buckles 342 can rotate relative to the rotating locking ring 341 via a rotating shaft. There are two slots 211 corresponding to the buckles 342. After the mixing head 300 is connected to the conveying pipe 200, the operator rotates the buckles 342 to engage with the slots 211. Through the cooperation between the buckles 342 and the slots 211 and the double fixation of the rotating locking ring 341, it is ensured that the mixing head 300 will not disintegrate from the conveying pipe 200 during operation.

[0036] In one embodiment, the locking groove 343 is L-shaped, and there are multiple locking grooves 343. The multiple locking grooves 343 are evenly spaced on the rotating locking ring 341, and the number of latches 212 corresponds to the locking grooves 343 and is evenly distributed on the tube shell 210.

[0037] In this embodiment, there are three locking grooves 343, and three corresponding latches 212. The three locking grooves 343 are evenly spaced on the inner side of the rotating locking ring 341, and each locking groove 343 has an opening at the end near the tube shell 210. The locking groove 343 is divided into a vertical section and a horizontal section. The end of the horizontal section is also provided with a damping elastic element. The vertical section is arranged along the axial direction of the rotating locking ring 341, and the horizontal section is perpendicular to the vertical section and extends circumferentially along the rotating locking ring 341. The operator moves the mixing head 30... After aligning the tube sleeve, press the mixing head 300 against the tube sleeve. The latch 212 on the surface of the tube sleeve slides into the vertical section through the opening of the locking groove 343. Then, by rotating the mixing head 300, the latch 212 slides into the horizontal section and abuts against the damping elastic element. The latch 212 is fixed by the interference fit of the damping elastic element, thus completing the fixation of the mixing head 300 relative to the tube sleeve. After the fixation is completed, the microcapsule repair agent pipeline 220 and the curing agent pipeline 230 in the delivery pipe 200 are connected to the mixing chamber in the mixing head 300.

[0038] In one embodiment, the depth of the spiral groove 221 is 0.5~1mm, and the pitch is 1 / 3~1 / 2 of the inner diameter of the microcapsule repair agent channel 220.

[0039] In this embodiment, the spiral groove 221 is used to move the microcapsule repair agent to the mixing head 300. The spiral groove 221 can disrupt the laminar boundary layer of the fluid, causing the microcapsule repair agent to move along the spiral path, generating circumferential eddies, and reducing flow resistance. At the same time, the spiral groove 221 can also continuously disturb the microcapsule repair agent, inhibiting the aggregation of microcapsules caused by gravity settling or electrostatic adsorption. During the spiral flow, the microcapsule repair agent can also flush the inner wall of the microcapsule repair agent channel 220, reducing particle adhesion, reducing cleaning and maintenance costs, and improving the particle size compatibility of microcapsules.

[0040] In one embodiment, the injector body 100 further includes a switching valve assembly 400, which includes a gate 410 and an opening / closing member 420. The opening / closing member 420 is disposed on the top of the injector body 100 and is connected to the gate 410. The gate 410 is rotatably disposed within the injection pipeline 120.

[0041] In this embodiment, the opening and closing component 420 is a handwheel. The operator can control the angle of the gate 410 by rotating and turning the handwheel, thereby controlling the flow rate of the fluid.

[0042] In another embodiment, the switching valve assembly 400 is a solenoid valve, and the opening and closing element 420 is an electrically controlled knob. The electrically controlled knob precisely controls the opening and closing angle of the gate 410 through the controller, so as to control the flow rate of the microcapsule repair agent or curing agent into the injector body.

[0043] In one embodiment, the injector body 100 includes a flow rate sensor 130 and a display screen 140. There are multiple flow rate sensors 130, which are respectively disposed in the microcapsule repair agent channel 220 and the curing agent channel 230. The flow rate sensors 130 are signal connected to the display screen 140, which is disposed at the top of the injector body 100.

[0044] In this embodiment, the display screen 140 is disposed on the top of the injector body 100, and the flow rate sensor 130 can also be disposed in the injection pipeline 120. The operator can directly observe the fluid flow rate in the microcapsule repair agent pipeline 220, the curing agent pipeline 230 and the injection pipeline 120 through the display screen 140.

[0045] This invention relates to a microcapsule injector for self-healing concrete cracks. The injector body, with its independently spaced liquid source interface and injection pipeline, connects the microcapsule repair agent and curing agent to the delivery pipe, respectively. The mixture then enters a mixing head with a mixing chamber, where the microcapsule repair agent and curing agent are mixed. Finally, the mixture is injected into the cured concrete crack through the mixing head, thus repairing the crack. This invention also features a simple structure, reducing production and maintenance costs.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A microcapsule injector for self-healing concrete cracks, characterized in that, include: The injector body is provided with a liquid source interface and an injection pipeline. The liquid source interface is located at one end of the injector body, and the injection pipeline is arranged along the axial direction of the injector body and is connected to the liquid source interface. The delivery tube includes a shell, a microcapsule repair agent conduit, a curing agent conduit, and a quick-release interface. The shell is fitted over the microcapsule repair agent conduit and the curing agent conduit. The microcapsule repair agent conduit and the curing agent conduit are arranged parallel to each other and spaced apart. The inner wall of the microcapsule repair agent conduit is also provided with a spiral groove, which extends along the axial direction of the microcapsule repair agent conduit. The liquid source interface is connected to the microcapsule repair agent conduit and the curing agent conduit through the injection pipeline. The quick-release interface is located on one end of the shell near the injector body, and the shell is detachably connected to the injector body through the quick-release interface. A mixing head includes a mixing head housing, a spiral guide vane assembly, and a connecting interface. A mixing chamber is formed inside the mixing head housing. The spiral guide vane assembly is arranged circumferentially along the inner wall of the mixing head housing. The connecting interface is disposed in the mixing head housing and detachably connected to the delivery pipe.

2. The microcapsule injector for self-healing concrete cracks as described in claim 1, characterized in that, The spiral guide vane group further includes a first guide vane group and a second guide vane group. The first guide vane group and the second guide vane group are arranged sequentially along the axial direction of the mixing chamber. The first guide vane group is located in the mixing chamber near one end of the delivery pipe. The tilt angle of the first guide vane group is 30°±5°, and the tilt angle of the second guide vane group is 15°±5°. The tilt angle is the angle between the guide vane and the axis of the mixing chamber.

3. The microcapsule injector for self-healing concrete cracks as described in claim 1, characterized in that, The mixing head also includes a locking mechanism, which includes a rotating locking ring and a buckle. The buckle is disposed on the outer wall of the connection interface, and the tube shell has a slot corresponding to the position of the buckle. The buckle engages with the slot. The rotating locking ring is sleeved on the connection interface, and the inner wall of the rotating locking ring has a locking groove. The tube shell has a tenon corresponding to the locking groove. The tenon is fixed by rotating around the circumference of the rotating locking ring and embedding it into the locking groove.

4. The microcapsule injector for self-healing concrete cracks as described in claim 3, characterized in that, The locking groove is L-shaped, and there are multiple locking grooves. The multiple locking grooves are evenly spaced on the rotating locking ring, and the number of the latches corresponds to the locking grooves and is evenly distributed on the tube shell.

5. The microcapsule injector for self-healing concrete cracks as described in claim 1, characterized in that, The depth of the spiral groove is 0.5~1mm, and the pitch is 1 / 3~1 / 2 of the inner diameter of the microcapsule repair agent channel.

6. The microcapsule injector for self-healing concrete cracks as described in claim 1, characterized in that, The injector body also includes a switching valve assembly, which includes a gate and an opening / closing element. The opening / closing element is located on the top of the injector body and is connected to the gate. The gate is rotatably disposed within the injection pipeline.

7. The microcapsule injector for self-healing concrete cracks as described in claim 1, characterized in that, The injector body includes a flow rate sensor and a display screen. There are multiple flow rate sensors, which are respectively disposed in the microcapsule repair agent channel and the curing agent channel. The flow rate sensors are signal connected to the display screen, which is disposed at the top of the injector body.

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