Pavement base crack grouting head

Abstract

A pavement base crack grouting head comprises a grouting head body and a one-way valve mechanism, a grout channel is formed in the grouting head body, the one-way valve mechanism is arranged in the grouting head body and can control the grout channel to be opened or closed, the one-way valve mechanism comprises a valve body and an elastic piece, and the elastic piece is located at the upper end of the valve body and penetrates through the valve body; the grouting head body is internally and sequentially provided with a fixing end and an abutting end from top to bottom, the fixing end facilitates fixing of the two ends of the elastic piece, the abutting end can abut against the side face of the valve body, when the elastic piece provides elastic force for the valve body to move upwards, the side face of the valve body abuts against the abutting end, and then the grout channel is closed. The one-way valve mechanism is introduced into the grouting head, so that the grouting head serves as a grouting tool and also serves as a tool for blocking a grouting hole, after grouting, the grouting head does not need to be dismantled, reverse spraying of grout can be avoided, and further, the grouting head is dismantled after the grout viscosity is increased, before complete solidification, pressure is reduced and the reverse spraying condition is relieved.

Description

A type of road base layer crack grouting head Technical Field

[0001] This utility model relates to the field of grouting head technology, and in particular to a grouting head for cracks in road base. Background Technology

[0002] Cracks in road surfaces during use are usually caused by factors such as subgrade settlement, temperature changes, and traffic load. To improve this problem, grouting material is typically injected into the ground under pressure, allowing it to extend underground and fill the cracks, thereby reinforcing the underground structure and restoring the integrity and smoothness of the road surface.

[0003] Because road surface cracks extend over long distances, they often result in insufficient filling. To overcome this problem, existing technologies, as shown in Figure 1, typically involve drilling holes along the cracks during construction. The holes are arranged in a staggered pattern, and one hole is selected as the grouting hole. Grout returning from the other holes after injection indicates that the crack at the point of return has been filled. After grouting, a rigid columnar workpiece is driven into these holes. The friction between the workpiece and the ground is used to fix the workpiece, thus sealing the grouting holes, and the grout is allowed to solidify. However, during grouting, grout is usually injected at a lower location under pressure. When the grouting head is removed at this location, grout may backflow.

[0004] To prevent grout backflow, construction workers typically cover the injection head with fabric quickly after removal before driving the columnar workpiece into the injection hole. However, the fabric only prevents some of the grout from backflowing; the remaining grout will spread to the road surface due to the fabric covering, and the fabric itself will also be driven into the injection hole along with the columnar workpiece.

[0005] Therefore, in order to avoid the backflow of grout after the grouting head is removed, a grouting head for road base cracks is designed. Summary of the Invention

[0006] The present invention aims to overcome the defects in the prior art and provide a grouting head for cracks in the road base layer.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a grouting head for cracks in the road base layer, comprising a grouting head body with an internal grout channel and a one-way valve mechanism disposed inside the grouting head body to control the opening or closing of the grout channel. The one-way valve mechanism includes a valve body and an elastic element, the elastic element being located at the upper end of the valve body and passing through the valve body. Inside the grouting head body, from top to bottom, there are a fixed end for facilitating the fixing of both ends of the elastic element and an abutting end that can abut against the side of the valve body. When the elastic element provides an upward elastic force for the valve body, the side of the valve body abuts against the abutting end, thereby closing the grout channel.

[0008] As a preferred embodiment of this utility model, a through hole is provided between the fixed end and the abutting end to allow the slurry to flow.

[0009] As a preferred embodiment of this utility model, the grouting head body further includes an upper cavity and a lower cavity, which are connected by a through hole. The diameter of the upper cavity is larger than that of the lower cavity, and the diameters of both the upper and lower cavities are larger than the diameter of the through hole.

[0010] As a preferred embodiment of this utility model, the abutting end is an arc surface whose diameter gradually increases from top to bottom, and the arc surface realizes the transition between the lower cavity and the through hole.

[0011] As a preferred embodiment of the present invention, the valve body includes a valve body body and a frame. The side of the valve body body is formed with an arc surface adapted to the abutment end. The frame is located at the center of the top of the valve body body and has a cavity formed in the frame to facilitate the passage of the elastic element.

[0012] In a preferred embodiment of this utility model, the elastic element protrudes upward in the middle, and the two ends of the elastic element form mounting portions; a cover is fixedly provided on the fixed end, and the mounting portions are disposed between the fixed end and the cover.

[0013] As a preferred embodiment of this utility model, it includes a horizontal brace on the same side as the elastic element and abutting against the upper end of the elastic element. The part of the horizontal brace that contacts the elastic element is an arc surface. Each horizontal brace is inserted laterally into the grouting head body from the outside of the grouting head body. The horizontal brace can move laterally into the grouting head body and squeeze the top of the elastic element to make it actively descend. At the same time, the valve body descends, thereby opening the grout channel.

[0014] As a preferred embodiment of this utility model, the outer wall of the impeller body is further provided with a retaining member sleeved on the outer ring of the cross brace, and the retaining member plays a sealing role for the interior of the impeller body.

[0015] As a preferred embodiment of this utility model, the guide member is used to guide the valve body to move vertically up and down. The guide member passes through the upper end of the frame and the elastic member and is fixed to the lower end of the frame.

[0016] As a preferred embodiment of this utility model, it includes a handle, at least two of which are symmetrically fixed on the outer wall of the propeller head body, and the handles are disposed away from the cross brace.

[0017] The beneficial effects of this utility model are:

[0018] Compared with the prior art, this utility model introduces a one-way valve mechanism into the grouting head, so that the grouting head serves as both a grouting tool and a tool for sealing the grouting hole. After grouting, there is no need to remove the grouting head, which can prevent the backflow of grout. Furthermore, after the grout viscosity increases and before it is completely solidified, the pressure decreases and the backflow situation is alleviated, the grouting head can be removed.

[0019] Meanwhile, compared with the one-way valve mechanism in the existing technology, the use of spring steel instead of torsion springs and helical compression springs results in larger parts, fewer dead angles after deformation, easier flushing, and a more reliable and safer structure. Each component is a rotating body or rod, block, or other parts, with fewer than ten core parts, resulting in lower production costs and suitability for commercialization. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the existing technology's grouting hole distribution in a plum blossom pattern.

[0021] Figure 2 is a front view of this utility model;

[0022] Figure 3 is a top view of this utility model;

[0023] Figure 4 is a cross-sectional view of this utility model;

[0024] Figure 5 is a structural schematic diagram of the valve body of this utility model;

[0025] Figure 6 is a structural schematic diagram of the cover shell of this utility model;

[0026] Figure 7 is an enlarged view of the structure at point A in Figure 6;

[0027] Figure 8 is a structural schematic diagram of the cross brace of this utility model;

[0028] Figure 9 is an enlarged view of the structure at point B in Figure 8;

[0029] Figure 10 is a schematic diagram of the installation of the elastic element of this utility model;

[0030] Figure 11 is a structural schematic diagram of the elastic element of this utility model;

[0031] Figure 12 is a schematic diagram of the installation of the connector of this utility model;

[0032] Figure 13 is a structural schematic diagram of the connector of this utility model;

[0033] Figure reference numerals: 1. Grouting head body; 2. One-way valve mechanism; 3. Guide component; 4. Cross brace; 5. Holding component; 6. Handle; 7. Connecting component; 11. Fixed end; 12. Through hole; 13. Abutment end; 14. Upper cavity; 15. Lower cavity; 21. Valve body; 22. Elastic component; 23. Cover shell; 211. Valve body body; 212. Frame; 221. Mounting part. Detailed Implementation

[0034] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] Example 1:

[0036] As shown in Figures 2-13, a grouting head for cracks in road base includes a grouting head body 1 with a grout channel formed inside, and a one-way valve mechanism 2 disposed inside the grouting head body 1 to control the opening or closing of the grout channel. The one-way valve mechanism 2 includes a valve body 21 and an elastic element 22. The elastic element 22 is located at the upper end of the valve body 21 and passes through the valve body 21. The grouting head body 1 is provided with a fixed end 11 for fixing both ends of the elastic element 22 and an abutting end 13 that can abut against the side of the valve body 21 from top to bottom. When the elastic element 22 provides the elastic force for the valve body 21 to move upward, the side of the valve body 21 abuts against the abutting end 13, thereby closing the grout channel.

[0037] A through hole 12 is provided between the fixed end 11 and the abutting end 13 to allow the slurry to flow.

[0038] The elastic element 22 is preferably made of spring steel.

[0039] Specifically, when grout is injected into the grouting head body 1, the grout pushes the top of the valve body 21 downward, and the side of the valve body 21 separates from the abutment end 13, creating a large gap between the valve body 21 and the abutment end 13, thereby opening the grout channel and allowing the grout to flow out of the grouting head body 1 from top to bottom. When the grout injection stops, the elastic element 22 resets, the side of the valve body 21 fits against the abutment end 13, and the grout channel is closed, preventing the grout from flowing back from bottom to top. At the same time, when the grout flows back from bottom to top, it will also promote the one-way valve mechanism 2 to further close the grout channel.

[0040] The grouting head body 1 also includes an upper cavity 14 and a lower cavity 15, which are connected by a through hole 12. The diameter of the upper cavity 14 is larger than that of the lower cavity 15, which facilitates the installation of components such as the one-way valve mechanism 2 in the upper cavity 14. The diameters of both the upper cavity 14 and the lower cavity 15 are larger than that of the through hole 12, which allows the valve body 21 located at the lower end of the through hole 12 to quickly seal the through hole 12 when the grout flows back, thereby improving the sealing performance of the one-way valve mechanism 2.

[0041] Furthermore, the shape of the abutment end 13 is defined to facilitate a better fit between the abutment end 13 and the side of the valve body 211, thereby improving the sealing performance of the one-way valve mechanism 2.

[0042] The abutting end 13 is an arc surface whose diameter gradually increases from top to bottom, and the arc surface realizes the transition between the lower cavity 15 and the through hole 12.

[0043] The valve body 21 includes a valve body 211 and a frame 212. The valve body 211 has an arc surface on its side that is adapted to the abutment end 13. The frame 212 is located at the top center of the valve body 211. A cavity is formed in the frame 212 to facilitate the passage of the elastic element 22.

[0044] The elastic element 22 protrudes upward in the middle, and the two ends of the elastic element 22 form mounting portions 221; a cover 23 is fixedly provided on the fixed end 11, and the mounting portion 221 is provided between the fixed end 11 and the cover 23. The cover 23 can be fixed to the mounting portion 221 by fasteners such as bolts, or it can be fixed to the mounting portion 221 by welding or other connection methods.

[0045] Specifically, the elastic element 22 passes through the frame 212 and the protruding part of the elastic element 22 abuts against the top of the frame 212. Therefore, when the mounting part 221 of the elastic element 22 is fixed to the fixed end 11 by the cover 23, the position of the valve body 21 is also limited. When the valve body 21 is subjected to the downward force of the slurry, the valve body 21 moves downward, the protruding part of the elastic element 22 deforms and moves downward, and the slurry channel is opened.

[0046] The grouting head body 1 is also provided with a guide 3 that guides the valve body 21 to move vertically up and down. The guide 3 passes through the upper end of the frame 212 and the elastic member 22 and is fixed to the lower end of the frame 212.

[0047] Specifically, a vertical through hole is formed at the upper end of the frame 212, and an elastic element 22 through hole is formed on the elastic element 22 that matches the through hole at the upper end of the frame 212. A vertical threaded hole is formed at the lower end of the frame 212. The guide 3 passes through the upper end of the frame 212 and the elastic element 22 and is fixed at the lower end of the frame 212, so that the valve body 21 moves up and down with the elastic element 22 as the reference, thus preventing the valve body 21 from tilting under the action of the slurry in different directions, thereby affecting the use effect of the one-way valve mechanism 2.

[0048] Example 2:

[0049] Compared to Example 1, Example 2 also includes a cross brace 4 and a clamping component 5 installed on the grouting head body 1.

[0050] The grouting head body 1 includes a horizontal support 4 on the same side as the elastic element 22 and abutting against the upper end of the elastic element 22. The part of the horizontal support 4 that contacts the elastic element 22 is an arc surface. Each horizontal support 4 is inserted laterally into the grouting head body 1 from the outside. The horizontal support 4 can move laterally into the grouting head body 1 and squeeze the top of the elastic element 22 to make it actively descend. At the same time, the valve body 21 descends, thereby opening the grout channel.

[0051] The outer wall of the impeller body 1 is also provided with a retaining member 5 that is sleeved on the outer ring of the cross brace 4. The retaining member 5 plays a sealing role for the inside of the impeller body 1.

[0052] Specifically, slots are provided on both sides of the grouting head body 1. The cross brace 4 can be inserted into the slots and slide laterally, allowing it to move laterally into the grouting head body 1 and compress the top of the elastic element 22 to actively descend. The elastic element 22 presses down on the valve body 21, causing the side of the valve body 21 to disengage from the abutment end 13, creating a large gap between the valve body 21 and the abutment end 13, thereby opening the grout channel. Although the cross brace 4 is a straight plate structure in Figures 4 and 8, its shape is not limited. Of course, the same idea should also apply to moving the cross brace 4 obliquely to achieve the same purpose. However, it is preferable that the lateral movement allows the cross brace 4 to act as a handle while also controlling the deformation of the elastic element 22. To reduce the friction between the cross brace 4 and the elastic element 22, the part of the cross brace 4 that contacts the elastic element 22 is an arc surface.

[0053] To improve sealing, a rubber clamp 5 is fixed to the outer wall of the grouting head body 1, so that the cross brace 4 passes through the clamp 5, which is a hollow rotating body. As a result, the cross brace 4 squeezes the clamp 5, and the clamp 5 deforms to wrap around the cross brace 4 to produce a sealing effect.

[0054] Furthermore, an ear-shaped handle structure is fixed to the end of the cross brace 4 away from the grouting head body 1 to facilitate the operation of the cross brace 4.

[0055] Furthermore, in Embodiments 1 and 2, handles 6 can also be provided. There are at least two handles 6, which are symmetrically fixed on the outer wall of the propeller head body 1. The handles 6 are located away from the cross brace 4. The handles 6 can be columnar, and when the two handles 6 are on a virtual V-shape, it conforms to the ergonomics during operation.

[0056] Regarding other improvements, for example, a bolt-connected connector 7 with external threads is used on the upper end of the grouting head body 1 to facilitate connection with the grouting pipeline.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0058] Although this document frequently uses reference numerals from the accompanying drawings, such as 1. Grouting head body, 2. One-way valve mechanism, 3. Guide, 4. Cross brace, 5. Holding member, 6. Handle, 7. Connecting member, 11. Fixed end, 12. Through hole, 13. Abutting end, 14. Upper cavity, 15. Lower cavity, 21. Valve body, 22. Elastic member, 23. Cover, 211. Valve body body, 212. Frame, 221. Mounting part, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A grouting head for cracks in the road base layer, comprising a grouting head body (1) with grout channels formed inside and a one-way valve mechanism (2) disposed inside the grouting head body (1) for controlling the opening or closing of the grout channels, characterized in that, The one-way valve mechanism (2) includes a valve body (21) and an elastic element (22). The elastic element (22) is located at the upper end of the valve body (21) and passes through the valve body (21). The grouting head body (1) is provided with a fixed end (11) for fixing both ends of the elastic element (22) and an abutting end (13) that can abut against the side of the valve body (21) from top to bottom. When the elastic element (22) provides the elastic force for the valve body (21) to move upward, the side of the valve body (21) abuts against the abutting end (13), thereby closing the grout channel.

2. The grouting head for road base cracks according to claim 1, characterized in that, A through hole (12) is provided between the fixed end (11) and the abutting end (13) to allow the slurry to flow.

3. The road base crack grouting head according to claim 2, characterized in that, The grouting head body (1) also includes an upper cavity (14) and a lower cavity (15). The upper cavity (14) and the lower cavity (15) are connected by a through hole (12). The diameter of the upper cavity (14) is larger than that of the lower cavity (15). The diameters of both the upper cavity (14) and the lower cavity (15) are larger than the diameter of the through hole (12).

4. The road base crack grouting head according to claim 3, characterized in that, The abutting end (13) is an arc surface whose diameter gradually increases from top to bottom, and the arc surface realizes the transition between the lower cavity (15) and the through hole (12).

5. The road base crack grouting head according to claim 1, characterized in that, The valve body (21) includes a valve body body (211) and a frame (212). The valve body body (211) has an arc surface on its side that is adapted to the abutment end (13). The frame (212) is located at the top center of the valve body body (211). A cavity is formed in the frame (212) to facilitate the passage of the elastic element (22).

6. The road base crack grouting head according to claim 1, characterized in that, The elastic element (22) protrudes upward in the middle, and the two ends of the elastic element (22) form mounting parts (221); a cover (23) is fixedly provided on the fixed end (11), and the mounting part (221) is provided between the fixed end (11) and the cover (23).

7. A grouting head for cracks in road base courses according to claim 6, characterized in that, Includes a cross brace (4) on the same side as the elastic element (22) and abutting against the upper end of the elastic element (22). The part of the cross brace (4) that contacts the elastic element (22) is an arc surface. Each cross brace (4) is inserted laterally into the grouting head body (1) from the outside. The cross brace (4) can move laterally into the grouting head body (1) and squeeze the top of the elastic element (22) to make it actively descend. At the same time, the valve body (21) descends, thereby opening the grout channel.

8. A grouting head for road base cracks according to claim 7, characterized in that, The outer wall of the head body (1) is also provided with a retaining member (5) sleeved on the outer ring of the cross brace (4), and the retaining member (5) plays a sealing role for the inside of the head body (1).

9. The road base crack grouting head according to claim 1, characterized in that, The guide (3) is used to guide the valve body (21) to move vertically up and down. The guide (3) passes through the upper end of the frame (212) and the elastic element (22) and is fixed to the lower end of the frame (212).

10. The road base crack grouting head of claim 7, wherein, Includes a handle (6), there are at least two handles (6), and they are symmetrically fixed on the outer wall of the head body (1), and the handles (6) are located away from the cross brace (4).

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