An underwater grouting head and grouting device

Abstract

The utility model discloses an underwater grouting head and grouting device, underwater grouting head includes inner casing, outer casing and apron, the inner casing has a grouting chamber, and the grouting chamber is provided with grout inlet and grout outlet on it and communicates, the outer casing is covered on the lateral wall of inner casing, and the medium cavity is formed between the inner lateral wall and the lateral wall of inner casing, and the medium inlet and medium outlet that communicate with the medium cavity are arranged on it, and the medium outlet ring is arranged in the side of grout outlet, the apron is the horn -like structure, and has deformability. The utility model has the advantages of: this underwater grouting head is isolated from the water flow through air curtain or water curtain barrier and apron, reduces the slurry dilution rate, makes the slurry coagulation in low disturbance environment, improves the grouting body compactness and the bonding strength, promotes the construction quality, and the whole underwater grouting head has no electronic component, is suitable for deep water environment, and the manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of underwater construction technology, and in particular to an underwater grouting head and grouting device. Background Technology

[0002] In the construction of underwater pile foundations, reinforcing bars are distributed in a ring array structure to form a columnar cavity, into which grout is then injected to form the pile foundation. Existing grouting heads (such as the underwater grouting head and device disclosed in application number 202310940920.0) are prone to scouring by water flow during underwater grouting operations, leading to grout dilution and segregation, resulting in decreased grout strength and matrix bonding failure. Existing technologies attempt to improve performance by increasing grout viscosity or adding anti-dispersing agents, but these methods cannot solve the dynamic scouring problem during the grouting process. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose an underwater grouting head and grouting device to solve the technical problem that the grout is easily washed away by water flow when the grouting head is performing underwater grouting operations in the prior art.

[0004] To achieve the above technical objectives, the present invention provides an underwater grouting head, comprising:

[0005] The inner shell has a grouting cavity, and has a grout inlet and a grout outlet communicating with the grouting cavity;

[0006] The outer shell covers the outer side wall of the inner shell, and a medium cavity is formed between the inner side wall and the outer side wall of the inner shell. A medium inlet and a medium outlet communicating with the medium cavity are provided on the outer shell, and the medium outlet is arranged in a ring around the side of the slurry outlet.

[0007] The skirt, which has a trumpet-shaped structure and is deformable, is arranged around the side of the medium outlet, and its edge is used to fit against the base surface of the pre-grouting cavity.

[0008] Furthermore, the inner shell is an inner tube, and the grouting cavity is formed inside the inner tube. The opening at one end of the inner tube forms the grout inlet, and the opening at the other end of the inner tube forms the grout outlet.

[0009] Furthermore, the inner tube has a straight tube structure.

[0010] Furthermore, the outer shell is an outer tube that covers the outer side wall of the inner tube. The inner side wall of the outer tube and the outer side wall of the inner tube form the medium cavity. The end of the medium cavity near the slurry inlet is sealed, and the end of the medium cavity near the slurry outlet is open to form the medium outlet. The outer tube has a medium inlet that communicates with the medium cavity.

[0011] Furthermore, the outer pipe has a tapered pipe section and a straight pipe section connected in sequence. The tapered pipe section is close to the slurry inlet, and the straight pipe section is close to the slurry outlet. The straight pipe section has the medium inlet.

[0012] Furthermore, the small end of the skirt covers the outer wall of the outer shell, and the edge of the large end of the skirt is used to fit against the base surface of the pre-grouting cavity.

[0013] Furthermore, the small end of the skirt covers the outer wall of the outer tube, and the small end of the skirt is located at the connection between the tapered tube section and the inner tube.

[0014] Furthermore, the underwater grouting head also includes an elastic element that connects the outer shell and the skirt, so that the skirt is in a retracted state. When the skirt is in a retracted state, it fits against the outer wall of the outer shell. When the skirt is impacted by grout, it is in an expanded state. When the skirt is in an expanded state, it is trumpet-shaped, and the edge of the skirt fits against the base surface of the pre-grouting cavity.

[0015] Furthermore, the elastic element is disposed at the connection between the tapered tube section and the inner tube, and is connected to the small end of the skirt.

[0016] On the other hand, this utility model also provides a grouting device, including the above-mentioned underwater grouting head, grouting pump and medium pump. The outlet end of the grouting pump is connected to the grout inlet and is used to inject grout into the grouting cavity. The outlet end of the medium pump is connected to the medium inlet and is used to inject medium into the medium cavity.

[0017] Compared with the prior art, the beneficial effects of this utility model include: During use, the grouting head is lowered to the underwater construction surface. An external medium source introduces a medium (air or water) into the medium inlet. The medium enters the medium cavity along the inlet and exits along the outlet. Because the outlet is located on the side of the grout outlet, a ring-shaped air or water curtain barrier in the same direction as the grouting direction is formed on the side of the outlet, effectively isolating some water flow. Then, an external grout source introduces grout into the inlet. The grout enters the grouting cavity along the inlet and exits along the outlet. When the grout is discharged from the outlet, pressure is applied to the skirt, causing it to adhere to the base surface of the pre-grouting cavity. This creates a temporary sealed cavity at the base surface of the pre-grouting cavity, further reducing the scouring of the grout by water flow. After grouting is completed, grouting is stopped first, and then the medium is stopped. This underwater grouting head uses air or water curtain barriers and the skirt to physically isolate water flow, reducing the grout dilution rate and allowing the grout to solidify in a low-disturbance environment. This improves the density and bonding strength of the grout body, enhancing construction quality. This underwater grouting head has no electronic components, making it suitable for deep-water environments and cost-effective to manufacture. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an underwater grouting head provided by this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a grouting device provided by this utility model;

[0020] In the diagram: 100 - inner shell, 110 - grouting cavity, 120 - grout inlet, 130 - grout outlet, 200 - outer shell, 210 - medium cavity, 220 - medium inlet, 230 - medium outlet, 300 - skirt, 400 - medium pump. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] This utility model provides an underwater grouting head, the structure of which is as follows: Figure 1As shown, the device includes an inner shell 100, an outer shell 200, and a skirt 300. The inner shell 100 has a grouting cavity 110, with an inlet 120 and an outlet 130 communicating with the grouting cavity 110. The outer shell 200 covers the outer wall of the inner shell 100, and a medium cavity 210 is formed between its inner wall and the outer wall of the inner shell 100. A medium inlet 220 and a medium outlet 230 communicating with the medium cavity 210 are formed on the outer shell 200, and the medium outlet 230 is arranged around the side of the outlet 130. The skirt 300 has a trumpet-shaped structure and is deformable. It is arranged around the side of the medium outlet 230, and its edge is used to fit with the base surface of the pre-grouting cavity.

[0023] In use, the grouting head is lowered to the underwater construction surface. An external medium source introduces medium (air or water) into the medium inlet 220. The medium enters the medium cavity 210 through the medium inlet 220 and exits through the medium outlet 230. Since the medium outlet 230 is arranged around the side of the grout outlet 130, a ring-shaped air or water curtain barrier in the same direction as the grouting direction is formed on the side of the grout outlet 130, effectively isolating some water flow. Then, grout is introduced into the grout inlet 120 through an external grout source. The grout enters the grouting cavity 110 through the grout inlet 120 and flows along the... As the grout is discharged from the outlet 130, it applies pressure to the skirt 300, causing the skirt 300 to adhere to the base surface of the pre-grouting cavity, thereby forming a temporary sealed cavity at the base surface of the pre-grouting cavity. This further reduces the scouring of the grout by water flow. After grouting is completed, grouting is stopped first, and then the medium is stopped. This underwater grouting head physically isolates the water flow through an air curtain or water curtain barrier and the skirt 300, reducing the grout dilution rate and allowing the grout to solidify in a low-disturbance environment. This improves the density and bonding strength of the grout body and enhances the construction quality. This underwater grouting head has no electronic components, is suitable for deep-water environments, and has low manufacturing costs.

[0024] As a preferred embodiment, please refer to Figure 1 The inner shell 100 is an inner tube, and the grouting cavity 110 is formed inside the inner tube. The opening at one end of the inner tube forms the grout inlet 120, and the opening at the other end of the inner tube forms the grout outlet 130. This design facilitates manufacturing and reduces energy loss of the grout in the grouting cavity 110.

[0025] In a preferred embodiment, the inner tube is made of DN50 seamless steel pipe, the outer diameter of the inner tube is 60mm, and the inlet 120 is rounded.

[0026] As a preferred embodiment, please refer to Figure 1The inner tube is a straight tube structure, so that the grout inlet 120 and the grout outlet 130 can correspond, and the grout will not bend in the grouting cavity 110, thereby reducing energy loss and improving the grouting effect.

[0027] As a preferred embodiment, please refer to Figure 1 The outer casing 200 is an outer tube that covers the outer side wall of the inner tube. The inner side wall of the outer tube and the outer side wall of the inner tube form the medium cavity 210. The end of the medium cavity 210 near the slurry inlet 120 is sealed, and the end of the medium cavity 210 near the slurry outlet 130 is open to form the medium outlet 230. The outer tube has a medium inlet 220 that communicates with the medium cavity 210. This facilitates manufacturing and reduces energy loss of the medium in the medium cavity 210, ensuring the effectiveness of the air curtain or water curtain barrier in isolating water flow.

[0028] In a preferred embodiment, the outer tube is made of DN80 steel pipe with an outer diameter of 89mm, and the outer tube is coaxially arranged with the inner tube.

[0029] In a preferred embodiment, the width of the medium cavity 210 is 15%-20% of the inner tube diameter.

[0030] In a preferred embodiment, the width of the medium cavity 210 is 8 mm–12 mm.

[0031] As a preferred embodiment, please refer to Figure 1 The outer pipe has a tapered pipe section and a straight pipe section connected in sequence. The tapered pipe section is close to the slurry inlet 120, and the straight pipe section is close to the slurry outlet 130. The straight pipe section is provided with the medium inlet 220.

[0032] In a preferred embodiment, the cone angle of the tapered tube section is 30°–60°, and the distance from the connection point of the tapered tube section and the inner tube to the slurry inlet 120 of the inner tube is greater than or equal to 50 mm.

[0033] In a preferred embodiment, the diameter of the medium inlet 220 is 8 mm, and it is connected to an external medium source via a quick-connect coupling.

[0034] As a preferred embodiment, please refer to Figure 1 The small end of the skirt 300 covers the outer wall of the outer shell 200, and the edge of the large end of the skirt 300 is used to fit with the base surface of the pre-grouting cavity, thereby improving the installation strength of the skirt 300 and the effect of isolating water flow.

[0035] As a preferred embodiment, please refer to Figure 1The small end of the skirt 300 covers the outer wall of the outer tube, and the small end of the skirt 300 is located at the connection between the tapered tube section and the inner tube, thereby improving the installation strength of the skirt 300 and its effect of isolating water flow.

[0036] In a preferred embodiment, the underwater grouting head further includes an elastic element that connects the outer shell 200 and the skirt 300, so that the skirt 300 is in a retracted state. When the skirt 300 is in the retracted state, it fits against the outer wall of the outer shell 200. When the skirt 300 is impacted by grout, it is in an expanded state. When the skirt 300 is in the expanded state, it is trumpet-shaped, and the edge of the skirt 300 fits against the base surface of the pre-grouting cavity. When the grout is discharged along the grout outlet 130, it applies pressure to the skirt 300, causing the skirt 300 to fit against the base surface of the pre-grouting cavity, thereby forming a temporary sealed cavity at the base surface of the pre-grouting cavity and reducing the scouring of the grout by the water flow.

[0037] In a preferred embodiment, the skirt 300 is in a gathered state, and the outer diameter of the large end of the skirt 300 is less than or equal to 89 mm.

[0038] In a preferred embodiment, the skirt 300 is made of rubber.

[0039] In a preferred embodiment, the skirt 300 is a nitrile rubber sheet.

[0040] In a preferred embodiment, the thickness of the skirt 300 is 5-10mm, and the unfolding angle of the skirt 300 when it is in the unfolded state is 60°-120°.

[0041] In a preferred embodiment, the elastic element is disposed at the connection between the tapered tube section and the inner tube, and is connected to the small end of the skirt 300.

[0042] In a preferred embodiment, the elastic element is a stainless steel spring hinge.

[0043] Please refer to Figure 2Based on the aforementioned underwater grouting head, this utility model also provides a grouting device, including the aforementioned underwater grouting head, grouting pump, and media pump 400. The outlet end of the grouting pump is connected to the grout inlet 120 for injecting grout into the grouting chamber 110. The outlet end of the media pump 400 is connected to the media inlet 220 for injecting media into the media chamber 210. In use, the grouting head is lowered to the underwater construction surface, and the media is introduced into the media inlet 220 through the media pump 400. The media can be air or water. The media enters the media chamber 210 along the media inlet 220 and is discharged along the media outlet 230. Since the media outlet 230 is arranged around the side of the grout outlet 130, an annular air ring can be formed on the side of the grout outlet 130. An air curtain or water curtain barrier is used to block the flow of grout. Grout is then pumped into the inlet 120 via a grouting pump. The grout enters the grouting chamber 110 through the inlet 120 and exits through the outlet 130. As the grout exits through the outlet 130, it applies pressure to the skirt 300, causing it to adhere to the base surface of the pre-grouting chamber, thus forming a temporary sealed cavity at the base surface of the pre-grouting chamber. This reduces the scouring effect of water flow on the grout. After grouting is completed, grouting is stopped first, and then the flow of medium is stopped. This underwater grouting head physically isolates the water flow through an air curtain or water curtain barrier and the skirt 300, reducing the grout dilution rate and allowing the grout to solidify in a low-disturbance environment. This improves the density and bonding strength of the grout body, enhancing construction quality. This underwater grouting head has no electronic components, making it suitable for deep-water environments and cost-effective to manufacture.

[0044] To better understand this utility model, the following is combined with... Figure 1 - Figure 2 The working principle of the technical solution of this utility model will be described in detail below:

[0045] In use, the grouting head is lowered to the underwater construction surface. The medium (air or water) is introduced into the medium inlet 220 via the medium pump 400. The medium enters the medium chamber 210 through the medium inlet 220 and exits through the medium outlet 230. Since the medium outlet 230 is arranged around the side of the grout outlet 130, a ring-shaped air or water curtain barrier in the same direction as the grouting direction is formed on the side of the grout outlet 130, which can isolate a certain amount of water flow. Then, grout is introduced into the grout inlet 120 via the grouting pump. The grout enters the grouting chamber 110 through the grout inlet 120 and... The grout is discharged through the outlet 130. When the grout is discharged through the outlet 130, it applies pressure to the skirt 300, causing the skirt 300 to adhere to the base surface of the pre-grouting cavity, thereby forming a temporary sealed cavity at the base surface of the pre-grouting cavity. This further reduces the scouring of the grout by the water flow. After grouting is completed, grouting is stopped first, and then the medium is stopped. This underwater grouting head physically isolates the water flow through an air curtain or water curtain barrier and the skirt 300, reducing the grout dilution rate and allowing the grout to solidify in a low-disturbance environment. This improves the density and bonding strength of the grout body and enhances the construction quality. This underwater grouting head has no electronic components, is suitable for deep-water environments, and has low manufacturing costs.

[0046] The underwater grouting head and grouting device provided by this utility model have the following beneficial effects:

[0047] (1) The medium is introduced into the medium inlet 220 by the medium pump 400. The medium can be air or water. The medium enters the medium cavity 210 along the medium inlet 220 and is discharged along the medium outlet 230. Since the medium outlet 230 is arranged around the side of the slurry outlet 130, an annular air curtain or water curtain barrier in the same direction as the grouting direction can be formed on the side of the slurry outlet 130 to isolate water flow disturbance.

[0048] (2) Grout is introduced into the grout inlet 120 by the grouting pump. The grout enters the grouting cavity 110 through the grout inlet 120 and is discharged through the grout outlet 130. When the grout is discharged through the grout outlet 130, it will apply pressure to the skirt 300, so that the skirt 300 is in contact with the base surface of the pre-grouting cavity, thereby forming a temporary sealing cavity at the base surface of the pre-grouting cavity to reduce the scouring of the grout by water flow.

[0049] (3) This underwater grouting head physically isolates water flow through air curtain or water curtain barrier and the skirt 300, reduces the grout dilution rate, and allows the grout to solidify in a low disturbance environment, thereby improving the density and bonding strength of the grout body and improving the construction quality. This underwater grouting head has no electronic components, is suitable for deep water environment, and has low manufacturing cost.

[0050] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An underwater grouting head, characterized in that, include: The inner shell has a grouting cavity, and has a grout inlet and a grout outlet communicating with the grouting cavity; The outer shell covers the outer side wall of the inner shell, and a medium cavity is formed between the inner side wall and the outer side wall of the inner shell. A medium inlet and a medium outlet communicating with the medium cavity are provided on the outer shell, and the medium outlet is arranged in a ring around the side of the slurry outlet. The skirt, which has a trumpet-shaped structure and is deformable, is arranged around the side of the medium outlet, and its edge is used to fit against the base surface of the pre-grouting cavity.

2. The underwater grouting head according to claim 1, characterized in that, The inner shell is an inner tube, and the grouting cavity is formed inside the inner tube. The opening at one end of the inner tube forms the grout inlet, and the opening at the other end of the inner tube forms the grout outlet.

3. The underwater grouting head according to claim 2, characterized in that, The inner tube has a straight tube structure.

4. The underwater grouting head according to claim 2, characterized in that, The outer casing is an outer tube that covers the outer side wall of the inner tube. The inner side wall of the outer tube and the outer side wall of the inner tube form the medium cavity. The end of the medium cavity near the slurry inlet is sealed, and the end of the medium cavity near the slurry outlet is open to form the medium outlet. The outer tube has a medium inlet that communicates with the medium cavity.

5. The underwater grouting head according to claim 4, characterized in that, The outer pipe has a tapered pipe section and a straight pipe section connected in sequence. The tapered pipe section is close to the slurry inlet, and the straight pipe section is close to the slurry outlet. The straight pipe section has the medium inlet.

6. The underwater grouting head according to claim 5, characterized in that, The small end of the skirt covers the outer wall of the outer shell, and the edge of the large end of the skirt is used to fit against the base surface of the pre-grouting cavity.

7. The underwater grouting head according to claim 6, characterized in that, The small end of the skirt covers the outer wall of the outer tube, and the small end of the skirt is located at the connection between the tapered tube section and the inner tube.

8. The underwater grouting head according to claim 7, characterized in that, It also includes an elastic element that connects the outer shell and the skirt so that the skirt is in a retracted state. When the skirt is in a retracted state, the skirt is in contact with the outer wall of the outer shell. When the skirt is impacted by grout, it is in an expanded state. When the skirt is in an expanded state, the skirt is trumpet-shaped and the edge of the skirt is in contact with the base surface of the pre-grouting cavity.

9. The underwater grouting head according to claim 8, characterized in that, The elastic element is disposed at the connection between the tapered tube section and the inner tube, and is connected to the small end of the skirt.

10. A grouting device, characterized in that, Includes the underwater grouting head, grouting pump, and medium pump as described in any one of claims 1-9, wherein the outlet end of the grouting pump is connected to the grout inlet for injecting grout into the grouting chamber, and the outlet end of the medium pump is connected to the medium inlet for injecting medium into the medium chamber.

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