In-hole pressure balancer for high-pressure jet grouting pile construction

Abstract

The in-hole pressure balancer for high-pressure jet grouting pile construction comprises a jet grouting head body, the outer surface of the jet grouting head body is slidably connected with a pressure balancer body, the inner surface of the pressure balancer body is provided with four lifting grooves, and the inner surfaces of the lifting grooves are slidably connected with clamping pieces; two mounting grooves are formed in the inner surface of the pressure balancer body, and sealing pieces are arranged on the inner surfaces of the mounting grooves. When the pressure balancer body is installed on the surface of the rotary spray head body, the pressure balancer body slides to the surface of the rotary spray head body, so that the pressure balancer body is attached to the auxiliary ring, then the worm is rotated, and the eight inserting blocks can be inserted into the inserting grooves to be fixed. And the pressure balancer body is fixed under the self-locking action of the worm gear and the worm, so that the fixing effect of the pressure balancer body is greatly improved, the working stability and the slurry pressure stability of the pressure balancer are improved, and the construction quality is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel pressure balancers, and more specifically, to a tunnel pressure balancer for high-pressure jet grouting pile construction. Background Technology

[0002] High-pressure jet grouting piles use high-pressure rotating nozzles to inject cement slurry into the soil layer and mix it with the soil to form a continuous, overlapping cement-reinforced body. The construction requires less land, has less vibration, and lower noise. It is generally used in conjunction with an in-hole pressure balancer, which can maintain stable pressure inside the hole during construction, reducing the risk of soil loosening or collapse. It can help control the water level and soil pressure inside the hole, ensuring that the jet grouting pile construction does not affect the stability of the surrounding soil.

[0003] In existing technologies, the pressure balancer inside the tunnel is generally fixed above the rotary nozzle by a clamp connection to prevent slurry leakage and to meet the needs of rapid installation and disassembly. However, since the rotary nozzle will be subjected to large vibrations during operation, the clamp connection may loosen over a long period of use, affecting the working stability of the pressure balancer, resulting in unstable slurry pressure and affecting the construction quality.

[0004] Therefore, we have made improvements and proposed an in-tunnel pressure balancer for high-pressure jet grouting pile construction. Utility Model Content

[0005] The purpose of this invention is to address the issue that the rotary nozzle is subjected to significant vibration during operation, and the clamp connection may loosen over time, affecting the working stability of the pressure balancer, leading to unstable slurry pressure and impacting construction quality.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A pressure balancer for tunnel construction of high-pressure jet grouting piles is proposed to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] The device includes a rotary nozzle body, a pressure balancer body slidably connected to the outer surface of the rotary nozzle body, four lifting grooves on the inner surface of the pressure balancer body, snap-fit ​​components for fixing the pressure balancer body to the surface of the rotary nozzle body slidably connected to the inner surface of the lifting grooves, two mounting grooves on the inner surface of the pressure balancer body, and sealing components provided on the inner surface of the mounting grooves.

[0010] When installing the pressure balancer body onto the surface of the swirl nozzle body, slide the pressure balancer body onto the surface of the swirl nozzle body so that the pressure balancer body fits against the auxiliary ring. Then, rotate the worm gear to insert the eight inserts into the slots for fixation. The fixation is achieved through the self-locking action of the worm wheel and worm gear, which greatly improves the fixing effect of the pressure balancer body, enhances the stability of the pressure balancer operation and grout pressure, and ensures construction quality.

[0011] In a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, the snap-fit ​​component includes a lifting plate, and four lifting plates are provided. The four lifting plates are slidably disposed inside four lifting slots. The inner surface of the pressure balancer body is provided with eight movable slots. The inner surface of each movable slot is slidably connected with an insert block. The insert block and the outer surface of each lifting plate are fixedly connected with an installation block. The inner surfaces of two installation blocks are rotatably connected to a rotating plate via a rotating shaft. The outer surface of the jet grouting head body is provided with eight slots, and the rotating plate is slidably disposed inside the slots.

[0012] As a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, the pressure balancer body has limit grooves on both sides of the movable groove, and the two limit blocks are fixedly connected to both sides of the outer surface of the insert block, and the two limit blocks are slidably arranged inside the two limit grooves respectively.

[0013] In a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, an auxiliary ring is fixedly connected to the outer surface of the jet grouting head body located on the lower side of the pressure balancer body.

[0014] As a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, the sealing element includes a sealing ring, which is disposed inside the mounting groove. Two connecting rings are fixedly connected between the inner surfaces of the four lifting plates, and the lower surface of the connecting ring is provided with an inclined surface.

[0015] In a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, a threaded groove is provided on the upper surface of the lifting plate, and a threaded rod is threadedly connected to the inner surface of the threaded groove. The threaded rod is rotatably connected to the pressure balancer body.

[0016] In a preferred embodiment of the pressure balancer for high-pressure jet grouting pile construction provided by this utility model, a worm gear is fixedly connected to the upper end of the threaded rod, a worm is meshed with the outer surface of the worm gear, a protective cover is fixedly connected to the upper surface of the pressure balancer body, and the worm is rotatably connected to the protective cover.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] When installing the pressure balancer body onto the surface of the swirl nozzle body, slide the pressure balancer body onto the surface of the swirl nozzle body so that the pressure balancer body fits against the auxiliary ring. Then, rotate the worm gear to insert the eight inserts into the slots for fixation. The fixation is achieved through the self-locking action of the worm wheel and worm gear, which greatly improves the fixing effect of the pressure balancer body, enhances the stability of the pressure balancer operation and grout pressure, and ensures construction quality. Attached Figure Description

[0019] Figure 1 A schematic diagram of the internal pressure balancer for high-pressure jet grouting pile construction provided in this application;

[0020] Figure 2 A front cross-sectional schematic diagram of the jet nozzle body of the pressure balancer for high-pressure jet grouting pile construction provided in this application.

[0021] Figure 3 An enlarged structural schematic diagram of A, the pressure balancer for high-pressure jet grouting pile construction provided in this application;

[0022] Figure 4 A schematic diagram of the lifting plate of the pressure balancer for high-pressure jet grouting pile construction provided in this application;

[0023] Figure 5 A front cross-sectional schematic diagram of the pressure balancer body for the high-pressure jet grouting pile construction pressure balancer provided in this application.

[0024] Figure 6 An enlarged structural schematic diagram of B, the pressure balancer for high-pressure jet grouting pile construction provided in this application;

[0025] Figure 7 A top cross-sectional schematic diagram of the pressure balancer body for the high-pressure jet grouting pile construction pressure balancer provided in this application.

[0026] Figure 8 This is an enlarged structural schematic diagram of C, the pressure balancer for high-pressure jet grouting pile construction provided in this application.

[0027] The image shows:

[0028] 1. Spray nozzle body; 11. Pressure balancer body; 2. Lifting groove; 21. Lifting plate; 22. Movable groove; 23. Insert block; 24. Mounting block; 25. Rotating plate; 26. Slot; 27. Limiting groove; 28. Limiting block; 29. ​​Auxiliary ring; 3. Mounting groove; 31. Sealing ring; 32. Connecting ring; 4. Threaded rod; 41. Threaded groove; 5. Worm gear; 51. Worm; 52. Protective cover. Detailed Implementation

[0029] 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, not all, of the embodiments of this utility model.

[0030] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] 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.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," 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 product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0036] 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.

[0037] Example 1

[0038] Please refer to Figure 1-8 A pressure balancer for high-pressure jet grouting pile construction includes a jet nozzle body 1. A pressure balancer body 11 is slidably connected to the outer surface of the jet nozzle body 1. Four lifting grooves 2 are formed on the inner surface of the pressure balancer body 11. A snap-fit ​​component for fixing the pressure balancer body 11 to the surface of the jet nozzle body 1 is slidably connected to the inner surface of the lifting grooves 2. Two mounting grooves 3 are formed on the inner surface of the mounting grooves 3, and a sealing element is provided on the inner surface of the mounting grooves 3. The snap-fit ​​component includes four lifting plates 21, which are slidably disposed within the four lifting grooves 2. Eight movable grooves 22 are formed on the inner surface of the pressure balancer body 11. Insert blocks 23 are slidably connected to the inner surface of the movable grooves 22. Mounting blocks 24 are fixedly connected to the outer surfaces of the insert blocks 23 and the lifting plates 21. A rotating plate 25 is rotatably connected between the inner surfaces of two mounting blocks 24 via a rotating shaft. Eight slots 26 are formed on the outer surface of the jet nozzle body 1, and the rotating plate 25 is slidably disposed within the slots 26. The pressure balancer body 11 has limit grooves 27 on both sides of the movable groove 22 inside. Limit blocks 28 are fixedly connected to both sides of the outer surface of the insert block 23, and the two limit blocks 28 are slidably disposed inside the two limit grooves 27 respectively. An auxiliary ring 29 is fixedly connected to the lower side of the pressure balancer body 11 on the outer surface of the rotary nozzle body 1. The sealing element includes a sealing ring 31, which is disposed inside the mounting groove 3. Two connecting rings 32 are fixedly connected between the inner surfaces of the four lifting plates 21, and the lower surface of the connecting rings 32 has an inclined surface. A threaded groove 41 is formed on the upper surface of one of the lifting plates 21, and a threaded rod 4 is threadedly connected to the inner surface of the threaded groove 41. The threaded rod 4 is rotatably connected to the pressure balancer body 11. A worm gear 5 is fixedly connected to the upper end of the threaded rod 4, and a worm 51 is meshed with the outer surface of the worm gear 5. A protective cover 52 is fixedly connected to the upper surface of the pressure balancer body 11, and the worm 51 is rotatably connected to the protective cover 52.

[0039] Implementation Process: During installation, the pressure balancer body 11 is fitted onto the vortex nozzle body 1. The auxiliary ring 29 on the outer surface of the vortex nozzle body 1 provides initial positioning and support for the pressure balancer body 11. Then, the worm gear 51 is rotated, causing the worm wheel 5 to rotate, which in turn drives the threaded rod 4 to rotate. Since the threaded rod 4 is threadedly connected to the threaded groove 41 on one of the lifting plates 21, and is rotatably connected to the pressure balancer body 11, its rotation causes the lifting plate 21 to slide downwards within the lifting groove 2. This causes the sealing ring 31 and the other three lifting plates 21 to slide synchronously. As the lifting plate 21 moves, it moves the mounting block 24 fixedly connected to it, causing the rotating plate to rotate. As the moving plate 25 rotates, it drives the insert block 23 to slide within the movable groove 22, causing the insert block 23 to insert into the slot 26 on the outer surface of the rotary nozzle body 1. This fixes the pressure balancer body 11 onto the rotary nozzle body 1. Simultaneously, as the connecting ring 32 moves downward, its lower inclined surface contacts the mounting block 24, causing the mounting block 24 to deform and fit tightly against the inner walls of the rotary nozzle body 1 and the mounting groove 3, further enhancing the sealing effect and preventing leakage of slurry or gas during the rotary spraying process. When it is necessary to remove the pressure balancer body 11 from the surface of the rotary nozzle body 1, simply rotate the worm gear 51 in the reverse direction. The rotary nozzle body 1 and the pressure balancer body 11 are existing technologies and will not be explained here.

[0040] Benefits of implementation: Enhanced sealing effect, preventing leakage of slurry or gas during the rotary spraying process.

[0041] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A hole pressure balancer for high-pressure jet grouting pile construction, comprising a jet head body (1), the outer surface of the jet head body (1) is slidingly connected with a pressure balancer body (11), characterized in that, The inner surface of the pressure equalizer body (11) is provided with four lifting grooves (2), the inner surface of the lifting groove (2) is slidably connected with a clamping piece for fixing the pressure equalizer body (11) on the surface of the rotary spray head body (1), the inner surface of the pressure equalizer body (11) is provided with two mounting grooves (3), and the inner surface of the mounting groove (3) is provided with a sealing piece.

2. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 1, characterized in that, The clamping piece comprises four lifting plates (21), the four lifting plates (21) are slidably arranged in the four lifting grooves (2), respectively, the inner surface of the pressure equalizer body (11) is provided with eight movable grooves (22), the inner surface of the movable groove (22) is slidably connected with an insertion block (23), the outer surface of the insertion block (23) and the lifting plate (21) is fixedly connected with a mounting block (24), the inner surface of the two mounting blocks (24) is rotatably connected with a rotating plate (25) through a rotating shaft, the outer surface of the rotary spray head body (1) is provided with eight insertion grooves (26), and the rotating plate (25) is slidably arranged in the insertion groove (26).

3. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 2, characterized in that, The inner surface of the pressure equalizer body (11) is provided with a limiting groove (27) on both sides of the movable groove (22), the outer surface of the insertion block (23) is fixedly connected with a limiting block (28) on both sides, and the two limiting blocks (28) are slidably arranged in the two limiting grooves (27), respectively.

4. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 3, characterized in that, The outer surface of the rotary spray head body (1) is fixedly connected with an auxiliary ring (29) on the lower side of the pressure equalizer body (11).

5. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 4, characterized in that, The sealing piece comprises a sealing ring (31), the sealing ring (31) is arranged in the mounting groove (3), the inner surface of the four lifting plates (21) is fixedly connected with two connecting rings (32), and the lower surface of the connecting ring (32) is provided with an inclined surface.

6. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 5, characterized in that, The upper surface of one of the lifting plates (21) is provided with a threaded groove (41), the inner surface of the threaded groove (41) is threadedly connected with a threaded rod (4), and the threaded rod (4) is rotatably connected with the pressure equalizer body (11).

7. The hole pressure balancer for high-pressure jet grouting pile construction according to claim 6, characterized in that, The upper end of the threaded rod (4) is fixedly connected with a worm wheel (5), the outer surface of the worm wheel (5) is meshingly connected with a worm (51), the upper surface of the pressure equalizer body (11) is fixedly connected with a protective cover (52), and the worm (51) is rotatably connected with the protective cover (52).

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