Vertical prestress reserved pipeline mud jacking device

Abstract

The utility model provides a vertical prestress reserved pipeline mud jacking device, which relates to the technical field of mud jacking equipment, and comprises a corrugated pipe, a mud conveying pipe and two groups of steel pipe assemblies, each group of steel pipe assembly comprises a steel connecting pipe and a connecting branch pipe welded with the steel connecting pipe; the included angle between the connecting branch pipe and the steel connecting pipe is 30-60 degrees, and the end, away from the steel connecting pipe, of the connecting branch pipe is connected with the corresponding slurry conveying pipe. The two ends of the corrugated pipe are connected with the corresponding steel connecting pipes respectively. The connecting pipe solves the technical problems that in the prior art, due to the fact that an inner plug type connecting mode is adopted between the connecting pipe and the corrugated pipe, the connecting position is prone to cracking in the prestressed pipeline installation and concrete pouring process, and slurry leakage and pipe blocking are caused.

Description

Technical Field

[0001] This utility model relates to the technical field of grouting equipment, and in particular to a grouting device for a vertical prestressed reserved pipe. Background Technology

[0002] Currently, during the construction of long-span bridges, vertical fine-rolled threaded steel bars are typically installed on the web of the box girder as prestressing tendons to ensure the safety of the bridge structure. However, due to the large number of prestressing ducts in bridges, the grouting quality often affects the durability of the bridge structure. Therefore, adopting reliable and simple vertical prestressing duct grouting technology is essential to improve construction speed and ensure the durability of the bridge structure.

[0003] Existing methods often employ a vertical, finely threaded U-shaped connecting pipe grouting scheme. This is a process used in bridge construction to ensure the quality of vertical prestressed grouting. The core of this method is to use a U-shaped connecting pipe to connect the grouting ports of adjacent vertical, finely threaded steel pipes, allowing for smoother grouting. During construction, first, the finely threaded steel, supporting components, and corrugated pipes are installed and secured as required. Next, sealed PVC pipes are used to connect the grouting ports at the bottom of adjacent steel pipes, forming a U-shaped pipe, clearly defining the grouting port and outlet. After the reinforcement formwork is installed, the box girder concrete is poured, taking care to protect the pipes. After the concrete reaches the required strength, the pipes are flushed with high-pressure water and then dried with an air compressor. Finally, cement grout prepared according to the design ratio is injected through the grouting port. Once thick grout gushes out from the outlet, pressure is maintained for 1-2 minutes to complete the grouting process.

[0004] However, because the plastic connecting pipe and the corrugated pipe are connected by an internal plug (the corrugated pipe is open and the plastic connecting pipe is inserted into the corrugated pipe), and the joint is fixed with transparent tape, the connection is prone to cracking during the installation of prestressed pipes and concrete pouring, resulting in grout leakage and pipe blockage. Utility Model Content

[0005] The purpose of this utility model is to provide a grouting device for vertical prestressed reserved pipes, so as to alleviate the technical problem in the prior art that the connection between the connecting pipe and the corrugated pipe is prone to cracking during the installation of prestressed pipes and concrete pouring, resulting in grout leakage and pipe blockage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In the first aspect, this utility model provides a vertical prestressed reserved pipe grouting device, including a corrugated pipe, a grout delivery pipe and two sets of steel pipe assemblies, each set of steel pipe assemblies including a steel connecting pipe and a connecting branch pipe welded to the steel connecting pipe;

[0008] The angle between the connecting branch pipe and the steel connecting pipe is 30°-60°, and the end of the connecting branch pipe away from the steel connecting pipe is connected to the corresponding slurry conveying pipe.

[0009] The two ends of the corrugated pipe are respectively connected to the corresponding steel connecting pipes.

[0010] Furthermore, the vertical prestressed reserved pipe grouting device also includes a fine-rolled threaded steel bar, which penetrates the corrugated pipe and the steel connecting pipes at both ends along the extension direction of the corrugated pipe.

[0011] Furthermore, the grout delivery pipe is provided in two sets, and one set of the grout delivery pipe is configured as an injection pipe, while the other set of the grout delivery pipe is configured as an outlet pipe;

[0012] The grouting pipe is connected to the connecting branch pipe at one end, and the other end of the grouting pipe is used to connect to an external grouting device.

[0013] The slurry outlet pipe is connected to the connecting branch pipe at the other end;

[0014] The grouting pipe is used to inject grout into the steel pipe assembly and the corrugated pipe to fill the gap between the steel pipe assembly and the corrugated pipe and the fine-rolled threaded steel.

[0015] Furthermore, the vertical prestressed reserved pipe grouting device also includes a clamping sleeve, which tightly covers the joint between the corrugated pipe and the steel connecting pipe.

[0016] Furthermore, the vertical prestressed reserved pipe grouting device also includes an end fixing component, which is connected to the fine-rolled threaded steel bar, and the end fixing component abuts against the end of the corresponding steel connecting pipe away from the corrugated pipe.

[0017] Furthermore, the end fixing assembly includes a nut that is threadedly connected to the precision-rolled threaded steel bar and is used to abut against the steel connecting pipe.

[0018] Furthermore, the end fixing assembly also includes an anchor pad, which is sleeved on the outside of the precision-rolled threaded steel bar and is located between the nut and the steel connecting pipe.

[0019] Furthermore, the vertical prestressed reserved pipe grouting device also includes spiral reinforcement, which is wound around and connected to the outside of the steel connecting pipe.

[0020] Furthermore, the inner diameter of the corrugated pipe is set to 50 mm, and the wall thickness is 1 mm;

[0021] The steel connecting pipe is 35mm long and 48mm in outer diameter. The steel connecting pipe is inserted into the corrugated pipe, and the insertion length is 5cm.

[0022] Furthermore, the steel connecting pipe has a rubber sealing ring inside the end that is inserted into the corrugated pipe.

[0023] This utility model can achieve the following beneficial effects:

[0024] In a first aspect, this utility model provides a vertical prestressed reserved pipe grouting device, including a corrugated pipe, a grout delivery pipe and two sets of steel pipe assemblies. Each set of steel pipe assemblies includes a steel connecting pipe and a connecting branch pipe welded to the steel connecting pipe. The included angle between the connecting branch pipe and the steel connecting pipe is 30°-60°, and the end of the connecting branch pipe away from the steel connecting pipe is connected to the corresponding grout delivery pipe. Both ends of the corrugated pipe are respectively connected to the corresponding steel connecting pipe.

[0025] In this invention, steel connecting pipes of a steel pipe assembly are connected to both ends of the corrugated pipe, and each end of the steel connecting pipe is provided with a connecting branch pipe. The angle between the connecting branch pipe and the steel connecting pipe can be between 30° and 60°, and the connection method is preferably welding. Therefore, this connection method can effectively prevent leakage when injecting slurry into the corrugated pipe. In use, the connecting branch pipe at one end is connected to an external feeding device through a slurry delivery pipe, while the connecting branch pipe at the other end is connected through a corresponding slurry delivery pipe. The feeding device injects slurry from the steel connecting pipe at one end of the corrugated pipe and discharges it from the steel connecting pipe at the other end.

[0026] Compared with the prior art, the vertical prestressed reserved pipe grouting device provided by this utility model sets steel connecting pipes at both ends of the corrugated pipe, and welds a connecting branch pipe to each steel connecting pipe, and connects to the grout delivery pipe through the connecting branch pipe. This avoids the situation where cracks occur at the connection point due to the direct connection between the grout delivery pipe and the corrugated pipe through the inner plug, which would lead to grout leakage and pipe blockage.

[0027] In summary, this utility model at least alleviates the technical problem in the prior art where the connection between the connecting pipe and the corrugated pipe is made by an internal plug-type connection, which causes cracking at the connection point during the installation of prestressed pipes and concrete pouring, resulting in grout leakage and pipe blockage. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the overall structure of the vertical prestressed reserved pipe grouting device provided in this embodiment of the utility model;

[0030] Figure 2 A partial structural schematic diagram of the vertical prestressed reserved pipe grouting device provided in the embodiment of this utility model.

[0031] Icons: 1-Steel pipe assembly; 11-Steel connecting pipe; 12-Connecting branch pipe; 2-Corrugated pipe; 3-Crimped sleeve; 4-Helical reinforcement; 5-Anchor pad; 6-Nut; 7-Precision rolled threaded steel; 8-Grouting pipe. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Example 1

[0040] This embodiment provides a grouting device for vertical prestressed reserved pipes, referring to... Figure 1 and Figure 2 The vertical prestressed reserved pipe grouting device includes a corrugated pipe 2, a grout delivery pipe 8, and two sets of steel pipe assemblies 1. Each set of steel pipe assemblies 1 includes a steel connecting pipe 11 and a connecting branch pipe 12 welded to the steel connecting pipe 11. The angle between the connecting branch pipe 12 and the steel connecting pipe 11 is 30°-60°, and the end of the connecting branch pipe 12 away from the steel connecting pipe 11 is connected to the corresponding grout delivery pipe 8. Both ends of the corrugated pipe 2 are respectively connected to the corresponding steel connecting pipe 11.

[0041] This utility model embodiment at least alleviates the technical problem in the prior art where the connection between the connecting pipe and the corrugated pipe 2 is an internal plug-type connection, which causes the connection to crack easily during the installation of prestressed pipes and concrete pouring, resulting in grout leakage and pipe blockage.

[0042] In this embodiment of the present invention, steel connecting pipes 11 of steel pipe assembly 1 are connected to both ends of the corrugated pipe 2, and each end of the steel connecting pipe 11 is provided with a connecting branch pipe 12. The angle between the connecting branch pipe 12 and the steel connecting pipe 11 can be between 30° and 60°, and the connection method is preferably welding. Therefore, such a connection method can effectively avoid leakage when injecting slurry into the corrugated pipe 2. In use, the connecting branch pipe 12 at one end is connected to an external feeding device through the slurry conveying pipe 8, while the connecting branch pipe 12 at the other end is connected through the corresponding slurry conveying pipe 8. The feeding device injects slurry from the steel connecting pipe 11 at one end of the corrugated pipe 2 and discharges it from the steel connecting pipe 11 at the other end.

[0043] Compared with the prior art, the vertical prestressed reserved pipe grouting device provided in this utility model embodiment provides a steel connecting pipe 11 at both ends of the corrugated pipe 2, and a connecting branch pipe 12 is welded to each steel connecting pipe 11. The connecting branch pipe 12 is connected to the grout delivery pipe 8, which avoids the situation where cracks occur at the connection point due to the direct connection between the grout delivery pipe 8 and the corrugated pipe 2 through the inner plug type, thus preventing grout leakage and pipe blockage.

[0044] Furthermore, referring to Figure 1 The vertical prestressed reserved pipe grouting device also includes a fine-rolled threaded steel bar 7, which runs through the corrugated pipe 2 and the steel connecting pipes 11 at both ends of the corrugated pipe 2 along the extension direction of the corrugated pipe 2.

[0045] Specifically: After the fine-rolled threaded steel bar 7 passes through the corrugated pipe 2 and the steel connecting pipes 11 at both ends, its two ends pass out from the steel connecting pipes 11 respectively, and the gap between the fine-rolled threaded steel bar 7 and the corrugated pipe 2 is used to fill the slurry injected through the steel connecting pipes 11.

[0046] Furthermore, referring to Figure 1 The grouting pipe 8 is provided in two sets, one of which is a grouting pipe and the other is a grouting outlet pipe. The grouting pipe is connected to a connecting branch pipe 12 at one end, and the other end of the grouting pipe is used to connect to an external grouting device. The grouting outlet pipe is connected to a connecting branch pipe 12 at the other end. The grouting pipe is used to inject grout into the steel pipe assembly 1 and the corrugated pipe 2 to fill the gap between the steel pipe assembly 1 and the corrugated pipe 2 and the fine-rolled threaded steel bar 7.

[0047] The corrugated pipe 2 is installed vertically. In this state, a set of steel pipe assemblies 1 are located at the bottom of the corrugated pipe 2, and another set of steel pipe assemblies 1 are located at the top of the corrugated pipe 2. The grout delivery pipe 8 connected to the steel pipe assembly 1 at the bottom is set as the grout injection pipe, while the grout delivery pipe 8 connected to the steel pipe assembly 1 at the top is set as the grout outlet pipe. In use, grout is injected through the grout injection pipe located below. After entering the corrugated pipe 2, the grout fills the gap between the corrugated pipe 2 and the precision-rolled threaded steel bar 7.

[0048] In an optional implementation of this embodiment, refer to Figure 1 The vertical prestressed reserved pipe grouting device also includes a clamping sleeve 3, which tightly wraps around the joint between the corrugated pipe 2 and the steel connecting pipe 11.

[0049] Specifically: There are two clamping sleeves 3, and the two clamping sleeves 3 are used to seal the connection between the corrugated pipe 2 and the two steel connecting pipes 11, thereby preventing the slurry from flowing out from the connection.

[0050] In an optional implementation of this embodiment, refer to Figure 1The vertical prestressed reserved pipe grouting device also includes an end fixing component, which is connected to the fine rolled threaded steel bar 7, and the end fixing component abuts against the end of the corresponding steel connecting pipe 11 away from the corrugated pipe 2.

[0051] Specifically: the end fixing components are connected to both ends of the fine-rolled threaded steel bar 7 to fix the corrugated pipe 2 together with the steel connecting pipe 11 relative to the fine-rolled threaded steel bar 7; in use, after the vertical prestressed reserved pipe grouting device is set on the web of the box girder, the part that exceeds the web of the box girder is cut off to meet the usage requirements.

[0052] Furthermore, referring to Figure 1 The end fixing component includes a nut 6, which is threaded to the finely rolled threaded steel bar 7 and is used to abut against the steel connecting pipe 11.

[0053] Specifically: Nut 6 is threadedly connected to the fine-rolled threaded steel bar 7. Nuts 6 at both ends are used to abut against the steel connecting pipe 11 to limit the connection structure of the steel connecting pipe 11 and the bellows 2, so that it is fixed relative to the fine-rolled threaded steel bar 7.

[0054] Furthermore, referring to Figure 1 The end fixing assembly also includes an anchor pad 5, which is sleeved on the outside of the fine-rolled threaded steel bar 7 and is located between the nut 6 and the steel connecting pipe 11.

[0055] Specifically: Anchor pad 5 is placed between nut 6 and steel connecting pipe 11 so that steel connecting pipe 11 and corrugated pipe 2 are fixed relative to fine rolled threaded steel bar 7. Anchor pad 5 and steel connecting pipe 11 are preferably welded. Anchor pad 5 has a side length of 130mm, a thickness of 30mm, and a pre-drilled hole diameter of 45mm.

[0056] In an optional implementation of this embodiment, refer to Figure 1 The vertical prestressed reserved pipe grouting device also includes a spiral bar 4, which is wound around and connected to the outside of the steel connecting pipe 11.

[0057] Specifically: the spiral rib 4 is wound around the outside of the steel connecting pipe 11, and preferably, the length of the spiral rib 4 is 360mm and the spiral diameter is 130mm.

[0058] In an optional implementation of this embodiment, refer to Figure 1 and Figure 2 The inner diameter of the corrugated pipe 2 is set to 50mm and the wall thickness is 1mm; the steel connecting pipe 11 is 35mm long and 48mm in outer diameter. The steel connecting pipe 11 is inserted into the corrugated pipe 2 and the insertion length is 5cm.

[0059] Specifically: the inner diameter of the corrugated pipe 2 is set to 50mm, and the wall thickness is 1mm. Its length is determined according to the length of the prestressing tendons. The steel connecting pipe 11 is mechanically connected to the corrugated pipe 2 using a sleeve or by welding. The connecting branch pipe 12 is 15cm long, has an outer diameter of 18mm, and a wall thickness of 2mm. The grout delivery pipe 8 has an outer diameter of 20mm and a wall thickness of 1mm. The grout delivery pipe 8 is sealed to the connecting branch pipe 12 using transparent tape. The diameter of the precision-rolled threaded steel bar 7 is 32mm.

[0060] In an optional implementation of this embodiment, refer to Figure 1 The steel connecting pipe 11 is used to insert a rubber sealing ring into one end of the corrugated pipe 2.

[0061] Specifically: The steel connecting pipe 11 is equipped with a rubber sealing ring inside one end that is inserted into the corrugated pipe 2, so as to effectively seal the joint between the steel connecting pipe 11 and the corrugated pipe 2 from the inner wall and prevent the slurry from leaking out from here.

[0062] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A vertical prestress reserved duct grouting device, characterized in that, The steel pipe assembly (1) comprises a steel connecting pipe (11) and a connecting branch pipe (12) welded with the steel connecting pipe (11). The included angle between the connecting branch pipe (12) and the steel connecting pipe (11) is 30-60°, and the end of the connecting branch pipe (12) away from the steel connecting pipe (11) is connected with the corresponding slurry pipe (8). The two ends of the corrugated pipe (2) are connected with the corresponding steel connecting pipes (11) respectively.

2. The vertical prestress reserved duct grouting device according to claim 1, characterized in that, The fine rolled threaded steel (7) penetrates the corrugated pipe (2) and the steel connecting pipes (11) at both ends of the corrugated pipe (2) along the extension direction of the corrugated pipe (2).

3. The vertical prestress duct grouting device according to claim 2, characterized in that, The slurry pipes (8) are provided in two groups, and the slurry pipes (8) in one group are provided as grouting pipes, and the slurry pipes (8) in the other group are provided as slurry outlet pipes. The grouting pipe is connected with the connecting branch pipe (12) at one end, and the other end of the grouting pipe is used for connecting with an external grouting device. The slurry outlet pipe is connected with the connecting branch pipe (12) at the other end. The grouting pipe is used for injecting slurry into the steel pipe assembly (1) and the corrugated pipe (2) to fill the gap between the steel pipe assembly (1), the corrugated pipe (2) and the fine rolled threaded steel (7).

4. The vertical prestress duct grouting device according to claim 1, wherein The pinch sleeve (3) is tightly wrapped at the joint between the corrugated pipe (2) and the steel connecting pipe (11).

5. The vertical prestress duct grouting device according to claim 2, wherein, The end fixing assembly is connected with the fine rolled threaded steel (7), and the end fixing assembly abuts against the end of the corresponding steel connecting pipe (11) away from the corrugated pipe (2).

6. The vertical prestress duct grouting device according to claim 5, wherein The end fixing assembly comprises a nut (6) which is threadedly connected with the fine rolled threaded steel (7), and the nut (6) is used for abutting against the steel connecting pipe (11).

7. The vertical prestress duct grouting device according to claim 6, characterized in that, The end fixing assembly further comprises an anchor pad (5) which is sleeved outside the fine rolled threaded steel (7), and the anchor pad (5) is arranged between the nut (6) and the steel connecting pipe (11).

8. The vertical prestress duct grouting device according to claim 1, wherein, The spiral rib (4) is arranged outside the steel connecting pipe (11).

9. The vertical prestress duct grouting device according to claim 1, wherein, The inner diameter of the corrugated pipe (2) is 50mm, and the pipe wall thickness is 1mm. The length of the steel connecting pipe (11) is 35mm, and the outer diameter is 48mm.

10. The vertical prestressing duct grouting device according to any one of claims 1-9, characterized in that, The steel connecting pipe (11) is inserted into the inside of one end of the corrugated pipe (2), and the insertion length is 5cm. The steel connecting pipe (11) is provided with a rubber sealing ring inside.

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