Pile side mud jacking valve

Abstract

The invention relates to a pile side mud jacking valve which comprises hoops used for being arranged on a grouting pipe at intervals, and the hoops are arranged corresponding to a slurry outlet in the grouting pipe. A through hole corresponding to the slurry outlet is formed in the hoop; the guide section is fixed on the hoop, the guide section is provided with a coaxial guide channel, the guide channel is correspondingly communicated with the through hole, and an internal thread section is arranged in the guide channel of the guide section; the valve body comprises a guide section, a switching structure connected with the guide section, and a valve head connected with the switching structure; the guiding section is of a hollow cylindrical structure. A guiding channel is formed in the middle of the guiding section. The guiding section is provided with an external thread section matched with the internal thread section of the guiding section in a threaded mode, a limiting structure enabling the guiding section to penetrate through the through hole to be inserted into the grout outlet is arranged between the guiding section and the guiding section, and after cement grout is discharged out of the grout outlet of the grouting pipe, the guiding section is directly inserted into the grout outlet. And cement paste is prevented from flowing out of a gap between the hoop and the grouting pipe, and the stability of the guide section relative to the guide section is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of post-grouting technology for cast-in-place piles, and in particular to a pile-side grouting valve. Background Technology

[0002] Post-grouting of cast-in-place piles refers to the process of injecting cement grout into the pile after a certain period of time following pile completion, through a grouting pipe pre-installed within the pile body and connected to grouting valves at the pile end and sides. This allows the soil (including sediment and mud cake) at the pile end and sides to be more tightly connected to the pile body via the cement grout, thereby reinforcing the cast-in-place pile, increasing its bearing capacity, and reducing settlement. Currently, the connection between the grouting valve and the grouting pipe often uses a threaded knob connection, primarily of two types: one is where the grouting valve is directly threaded onto the internal thread of the grouting pipe. Due to the thin wall and limited number of threads on the grouting pipe, this connection is often weak and prone to detachment; the other is a sleeve-type straight thread connection, which requires cutting the grouting pipe to complete the connection.

[0003] In response, the existing publicly available technology CN212318822U discloses a grouting valve for steel-concrete composite columns. This valve employs a clamp detachably connected to the grouting pipe and a valve body detachably connected to the clamp to increase strength. The clamp has a through hole corresponding to the grout outlet, which is connected to the valve body. Cement grout from the grouting pipe flows from the outlet into the through hole, then through the through hole to the valve body, and finally exits through the grouting valve to achieve grouting of the cast-in-place pile. However, this structure has significant drawbacks in practical applications: because the clamp and the grouting pipe are not completely fitted together, gaps exist between them, causing grout to overflow. This not only affects the efficiency of grouting after the cast-in-place pile is completed, but the overflowing cement grout also adheres between the clamp and the grouting pipe, making it difficult to disassemble the grouting valve relative to the grouting pipe.

[0004] A pile-side grouting valve is provided, which can guide cement grout directly into the grouting pipe. The cement grout does not directly contact the clamp. While ensuring the connection strength of the grouting valve, it can ensure that the cement grout will not leak, which is beneficial to improving grouting efficiency. Summary of the Invention

[0005] In order to overcome the defects of the prior art, the present invention provides a pile-side grouting valve, which effectively solves the problem that the connection between the clamp and the grouting pipe is not tight enough in the prior art, and the cement slurry easily flows out from the gap between the clamp and the grouting pipe.

[0006] The technical solution is to use clamps, which are installed at intervals on the grouting pipe, with the clamps corresponding to the grout outlets on the grouting pipe. The clamp has a through hole corresponding to the slurry outlet; The guide section is fixed on the clamp. The guide section is provided with a coaxial guide channel, which is connected to the through hole. The guide channel of the guide section is provided with an internal thread section. The valve body includes a guide section, a transition structure connected to the guide section, and a valve head connected to the transition structure; The guide section is a hollow cylindrical structure, and a guide channel is provided in the middle of the guide section; The guide section is provided with an external thread section that is adapted to the internal thread section of the guide section. A limiting structure is provided between the guide section and the guide section to allow the end of the guide section to pass through the through hole and be inserted into the slurry outlet.

[0007] Beneficial effects: In this application, a guide section is fixedly installed on the clamp, and the guide section is provided with a coaxial guide channel. The valve body includes the guide section, a transition structure connected to the guide section, and a valve head connected to the transition structure. The guide section is a hollow cylindrical structure with a guide channel in the middle and an external threaded section on the outside. The guide section and the guide section are connected by threads. A limiting structure is provided between the guide section and the guide section to allow the end of the guide section to pass through the through hole and insert into the grout outlet. During grouting after the cast-in-place pile is grouted, the cement slurry is discharged from the grout outlet of the grouting pipe and then directly enters the guide channel of the guide section. It then enters the valve head through the guide channel and finally exits from the valve head. That is, after the cement slurry is discharged from the grout outlet of the grouting pipe, it directly enters the guide channel of the guide section. The guide section is directly inserted into the grout outlet, preventing the cement slurry from flowing out from the gap between the clamp and the grouting pipe. Furthermore, the limiting structure between the guide section and the guide section ensures the stability of the guide section relative to the guide section.

[0008] Furthermore, the end of the guide segment facing the guide segment is provided with limiting transverse lines extending along the axial direction of the guide segment and evenly distributed along the circumference of the guide segment. The guide segment is provided with a limiting hole that communicates with the guide channel. An arc-shaped limiting block adapted to the limiting hole is hinged to the guide segment. A transverse stop tooth adapted to the limiting transverse lines is provided on the side of the limiting block facing the guide channel. The limiting structure includes limiting transverse lines and transverse stop teeth.

[0009] Beneficial effects: The guide section and the guide section are connected by threads. Moreover, the limiting transverse groove of the guide section and the transverse stop teeth of the arc-shaped limiting block of the guide section are matched in a circumferential limiting manner to prevent the guide section from rotating circumferentially relative to the guide section. Thus, while ensuring the connection between the guide sections, the guide section is also limited axially.

[0010] Furthermore, a first ear plate is fixed on the guide section, and a second ear plate adapted to the first ear plate is provided on the limiting block. The first ear plate and the second ear plate are connected by bolts.

[0011] Beneficial effects: The first ear plate, the second ear plate, and the bolts make it easy to fix the limiting block on the guide section.

[0012] The adapter structure is a connecting sleeve, and the connecting sleeve is provided with a connecting thread that is compatible with the thread of the external thread section of the guide section.

[0013] Beneficial effect: The design of the connecting sleeve facilitates the connection between the guide section and the connecting sleeve.

[0014] Furthermore, the valve head includes a connecting cylinder that is threadedly connected to the connecting sleeve. The connecting cylinder is positioned facing the opening of the connecting sleeve. The end of the connecting cylinder away from the connecting sleeve is sealed off. The end of the connecting cylinder away from the connecting sleeve has a circumferentially opened outlet.

[0015] Beneficial effects: The valve head is connected to the connecting sleeve through the connecting cylinder, thereby realizing the connection between the valve head and the guide section. Furthermore, the connecting cylinder and the guide section are tightly fitted in the connecting sleeve, allowing cement slurry to directly reach the connecting cylinder from the guide section and finally be discharged from the outlet at the end of the connecting sleeve.

[0016] Furthermore, a sealing plate is fixed to the end of the connecting cylinder away from the connecting sleeve. The sealing plate is circular, with its center located on the axis of the connecting cylinder, and its diameter is larger than the radius of the connecting cylinder.

[0017] Beneficial effects: The sealing plate can effectively block external cement slurry or other dust, preventing cement slurry or dust from entering the valve head from the outlet and clogging the valve head.

[0018] Furthermore, a shield is fixed on the connecting cylinder, and the shield is an flared structure with the axial opening of the connecting cylinder gradually increasing towards the sealing plate.

[0019] Beneficial effect: The shield can block the outlet, preventing external cement slurry or other dust from entering the valve head from the outlet.

[0020] Furthermore, the end of the shield facing the sealing plate is flush with the sealing plate.

[0021] Beneficial effects: The shield and the sealing plate work together to limit the discharge path of cement slurry and protect the discharge outlet.

[0022] The clamp includes a semi-circular first ring plate and a second ring plate hinged to one end of the first ring plate. The second ring plate and the first ring plate are detachably connected by bolts, and the through hole is opened on the first ring plate.

[0023] Beneficial effects: The structure of the clamp facilitates the connection between the clamp and the grouting pipe. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the installation of a pile-side grouting valve on a grouting pipe according to the present invention; Figure 2 This is a schematic diagram of the structure of a pile-side grouting valve according to the present invention; Figure 3 This is a schematic diagram of the clamp and guide section of a pile-side grouting valve according to the present invention; Figure 4 This is a schematic diagram showing the connection between the guide section and the guide section of the valve body of a pile-side grouting valve according to the present invention; Figure 5 yes Figure 3 A cross-sectional view of the clamp and guide section in the middle; Figure 6 yes Figure 5 A schematic diagram of the structure where the limiting block of the middle guide section is open; Figure 7 This is a structural diagram of the introductory section; Figure 8 This is a cross-sectional view of the valve head of the valve body.

[0025] Reference numerals in the attached drawings: 1-grouting pipe; 2-grout outlet; 3-grouting valve; 4-first ring plate; 5-second ring plate; 6-first connecting lug; 7-second connecting lug; 8-through hole; 9-guide section; 10-limiting hole; 11-limiting block; 12-guide section; 13-limiting transverse groove; 14-external thread section; 15-connecting sleeve; 17-connecting cylinder; 18-sealing plate; 19-discharge outlet; 20-shielding cover; 21-first lug plate; 22-second lug plate; 23-transverse stop tooth. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, three grouting pipes 1 are arranged circumferentially and extend vertically around the pile. Several grout outlets 2 are spaced apart along the extension direction of the grouting pipes 1. A grouting valve 3 is correspondingly installed at each grout outlet 2 of the grouting pipe 1 to discharge the cement grout from the grouting pipe 1 through the grouting valve 3. Specifically, the grouting valve 3 includes a clamp, which is correspondingly installed at each grout outlet 2 on the grouting pipe 1, and the grouting valve 3 is fixedly connected to the grouting pipe 1 through the clamp.

[0028] The clamp has a through hole 8 corresponding to the grout outlet 2 of the grouting pipe 1. Specifically, the clamp includes a semi-circular first ring plate 4 and a second ring plate 5 hinged to one end of the first ring plate 4. At the hinge end away from the first ring plate 4 and the second ring plate 5, the second ring plate 5 and the first ring plate 4 are detachably connected by bolts. That is, the first ring plate 4 has a first connecting lug 6 at the hinge end, and a first through hole is formed on the first connecting lug 6. The second ring plate 5 has a second connecting lug 7 at the hinge end, and a second through hole is formed on the second connecting lug 7. The first connecting lug 6 and the second connecting lug 7 are connected by bolts passing sequentially through the first through hole and the second through hole. In this embodiment, the through hole 8 on the clamp is formed on the first ring plate 4.

[0029] A guide section 9 is fixedly provided on the first ring plate 4 of the clamp. A coaxial guide channel is provided in the guide section 9. The guide channel is connected to the through hole 8. An internal thread section is provided in the guide channel of the guide section 9.

[0030] The grouting valve 3 also includes a valve body, which includes a guide section 12, a transition structure connected to the guide section 12, and a valve head connected to the transition structure. The guide section 12 is a hollow cylindrical structure with a guide channel in the middle. The guide section 12 is provided with an external thread section 14 that is adapted to the internal thread section of the guide section 9. The guide section 12 is threadedly connected to the inside of the guide section 9 through the external thread section 14.

[0031] The adapter structure is a connecting sleeve 15, which has a connecting thread that matches the thread of the external threaded section 14 of the guide section 12. The valve head includes a connecting cylinder 17 that is threadedly connected to the connecting sleeve 15. The connecting cylinder 17 is positioned facing the opening of the connecting sleeve 15. The connecting cylinder 17 and the guide section 12 are tightly fitted together in the connecting sleeve 15. That is, the guide channel of the guide section 12 is connected to the connecting cylinder 17, and the cement slurry can directly reach the connecting cylinder 17 from the guide section 12.

[0032] The end of the connecting cylinder 17 away from the connecting sleeve 15 is sealed, and a discharge port 19 is circumferentially opened at the end of the connecting cylinder 17 away from the connecting sleeve 15. In this embodiment, a sealing plate 18 is fixed to the end of the connecting cylinder 17 away from the connecting sleeve 15. The sealing plate 18 is circular, and its center is located on the axis of the connecting cylinder 17, and its diameter is larger than the radius of the connecting cylinder 17. Cement slurry directly reaches the connecting cylinder 17 from the guide section 12 and is finally discharged from the discharge port 19 at the end of the connecting cylinder 17.

[0033] A shield 20 is fixed on the connecting cylinder 17. The shield 20 is an flared structure with an axial opening that gradually increases in size towards the sealing plate 18. The end of the shield 20 facing the sealing plate 18 is flush with the sealing plate 18. The shield 20 and the sealing plate 18 work together to limit the discharge path of the cement slurry. After the cement slurry is discharged radially from the outlet 19 of the connecting cylinder 17, it passes through the gap between the shield and the connecting cylinder 17 under the blocking effect of the shield 20. This makes the discharge path of the cement slurry bend, preventing external cement slurry from entering the connecting cylinder 17 from the outlet 19 and protecting the outlet 19.

[0034] A limiting structure is provided between the guide section 9 and the guide section 12 to allow the end of the guide section 12 to pass through the through hole 8 and be inserted into the slurry outlet 2. The end of the guide section 12 facing the guide section 9 is provided with limiting transverse lines 13 that extend axially along the guide section 12 and are evenly distributed circumferentially along the guide section 12. The limiting transverse lines 13 are connected to the external thread section 14. The guide section 9 is provided with a limiting hole 10 that communicates with the guide channel. An arc-shaped limiting block 11 that matches the limiting hole 10 is hinged to the guide section 9. A transverse stop tooth 23 that matches the limiting transverse lines 13 is provided on the side of the limiting block 11 facing the guide channel. The limiting structure includes the limiting transverse lines 13 and the transverse stop tooth 23. The limiting transverse stripe 13 of the guide section 12 and the transverse stop tooth 23 of the arc-shaped limiting block 11 of the guide section 9 are circumferentially stopped and limited to prevent the guide section 12 from rotating circumferentially relative to the guide section 9. This ensures the connection between the guide section 9 and the guide section 12 while limiting the guide section 12 in the axial direction of the guide section 9.

[0035] A first ear plate 21 is fixed on the guide section 9, and a second ear plate 22 adapted to the first ear plate 21 is provided on the limiting block 11. The first ear plate 21 and the second ear plate 22 are connected by bolts. The arrangement of the first ear plate 21, the second ear plate 22 and the bolts can easily fix the limiting block 11 on the guide section 9 and prevent the limiting block 11 from rotating along the hinge axis.

[0036] During the grouting process after the cast-in-place pile is installed, the cement slurry is discharged from the outlet 2 of the grouting pipe 1 and then directly enters the guide channel of the guide section 12 set in the guide section 9. After passing through the guide channel, it enters the valve head and is finally discharged from the valve head. That is, after the cement slurry is discharged from the outlet 2 of the grouting pipe 1, it directly enters the guide channel of the guide section 12. The guide section 12 is directly inserted into the outlet 2 to prevent the cement slurry from flowing out from the gap between the clamp and the grouting pipe 1. In addition, a limiting structure is set between the guide section 9 and the guide section 12 to ensure the stability of the guide section 12 relative to the guide section 9.

[0037] In the above embodiments, the end of the guide segment 12 facing the guide segment 9 is provided with limiting transverse lines 13 extending axially along the guide segment 12 and evenly distributed circumferentially along the guide segment 12. The guide segment 9 is provided with a limiting hole 10 communicating with the guide channel. An arc-shaped limiting block 11 adapted to the limiting hole 10 is hinged to the guide segment 9. A transverse stop tooth 23 adapted to the limiting transverse lines 13 is provided on one side of the limiting block 11 facing the guide channel. In other embodiments, the end of the guide segment 12 facing the guide segment 9 may also be provided with a limiting hole 10. The guide segment 9 is provided with a through hole corresponding to the limiting hole 10. A limiting screw is provided between the limiting hole 10 and the through hole.

[0038] In the above embodiments, a first ear plate 21 is fixed on the guide segment 9, and a second ear plate 22 adapted to the first ear plate 21 is provided on the limiting block 11. The first ear plate 21 and the second ear plate 22 are connected by bolts. In other embodiments, the limiting block 11 can also be detachably connected to the guide segment 9 through other structural forms.

[0039] In the above embodiments, a sealing plate 18 is fixed at the end of the connecting cylinder 17 away from the connecting sleeve 15. The sealing plate 18 is circular, and the center of the sealing plate 18 is located on the axis of the connecting cylinder 17. The diameter of the sealing plate 18 is greater than the radius of the connecting cylinder 17. In other embodiments, the diameter of the sealing plate 18 may also be equal to the diameter of the connecting cylinder 17.

[0040] In the above embodiments, a shield 20 is fixed on the connecting cylinder 17. The shield 20 is an flared structure in which the axial opening of the connecting cylinder 17 toward the sealing plate 18 gradually increases. In other embodiments, the shield 20 may not be provided. Alternatively, the shield 20 may be a cylindrical structure in which the connecting cylinder 17 is axially aligned with the sealing plate 18.

[0041] In the above embodiments, the end of the shield 20 facing the sealing plate 18 is flush with the sealing plate 18; in other embodiments, the end of the shield 20 facing the sealing plate 18 may also be located on the right side of the sealing plate 18.

[0042] In summary, the present invention can guide cement slurry directly into the grouting pipe 1, without direct contact between the cement slurry and the clamp. While ensuring the connection strength of the grouting valve, it can ensure that the cement slurry will not leak sideways, which is beneficial to improving grouting efficiency and facilitating disassembly later.

Claims

1. A pile-side grouting valve, characterized in that it comprises: Grouting pipe (1), clamp, guide section (9), valve body, guide section (12); The clamps are spaced apart on the grouting pipe (1), and the clamps are correspondingly set with the grout outlets (2) on the grouting pipe (1); The clamp is provided with a through hole (8) corresponding to the slurry outlet (2); The guide section (9) is fixed on the clamp. The guide section (9) is provided with a coaxial guide channel. The guide channel is connected to the through hole (8). The guide channel of the guide section (9) is provided with an internal thread section. The valve body includes a guide section (12), a transition structure connected to the guide section (12), and a valve head connected to the transition structure; The guide section (12) is a hollow cylindrical structure, and a guide channel is provided in the middle of the guide section (12); The guide section (12) is provided with an external thread section (14) that is adapted to the internal thread section of the guide section (9). A limiting structure is provided between the guide section (9) and the guide section (12) to allow the end of the guide section (12) to pass through the through hole (8) and be inserted into the slurry outlet (2).

2. The pile-side grouting valve according to claim 1, characterized in that, The guide section (12) is provided with a limiting transverse ridge (13) extending axially along the guide section (12) and evenly distributed circumferentially along the guide section (12) at the end facing the guide section (9). The guide section (9) is provided with a limiting hole (10) that communicates with the guide channel. An arc-shaped limiting block (11) that matches the limiting hole (10) is hinged to the guide section (9). A transverse stop tooth (23) that matches the limiting transverse ridge (13) is provided on one side of the limiting block (11) facing the guide channel. The limiting structure includes the limiting transverse ridge (13) and the transverse stop tooth (23).

3. A pile-side grouting valve according to claim 2, characterized in that, A first ear plate (21) is fixed on the guide section (9), and a second ear plate (22) adapted to the first ear plate (21) is provided on the limiting block (11). The first ear plate (21) and the second ear plate (22) are connected by bolts.

4. A pile-side grouting valve according to any one of claims 1-3, characterized in that, The adapter structure is a connecting sleeve (15), and the connecting sleeve (15) is provided with a connecting thread that is compatible with the thread of the external thread section (14) of the guide section (12).

5. A pile-side grouting valve according to claim 4, characterized in that, The valve head includes a connecting sleeve (17) that is threadedly connected to the connecting sleeve (15). The connecting sleeve (17) and the guide section (12) are tightly fitted in the connecting sleeve (15). The connecting sleeve (17) is open towards the connecting sleeve (15). The end of the connecting sleeve (17) away from the connecting sleeve (15) is sealed. The end of the connecting sleeve (17) away from the connecting sleeve (15) is circumferentially provided with a discharge port (19).

6. A pile-side grouting valve according to claim 5, characterized in that, A sealing plate (18) is fixed at one end of the connecting cylinder (17) away from the connecting sleeve (15). The sealing plate (18) is circular, and the center of the sealing plate (18) is located on the axis of the connecting cylinder (17). The diameter of the sealing plate (18) is greater than the radius of the connecting cylinder (17).

7. A pile-side grouting valve according to claim 6, characterized in that, A shield (20) is fixed on the connecting cylinder (17). The shield (20) is a flared structure in which the axial opening of the connecting cylinder (17) toward the sealing plate (18) gradually increases.

8. A pile-side grouting valve according to claim 7, characterized in that the end of the shield (20) facing the sealing plate (18) is flush with the sealing plate (18).

9. A pile-side grouting valve according to any one of claims 1-3, characterized in that, The clamp includes a semi-circular first ring plate (4) and a second ring plate (5) hinged to one end of the first ring plate (4). The second ring plate (5) and the first ring plate (4) are detachably connected by bolts, and a through hole (8) is opened on the first ring plate (4).

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