Municipal road horizontal directional drilling chambering pull-back device

Abstract

The utility model discloses a municipal road horizontal directional drilling chambering pull-back device which comprises a transmission rod, the outer wall of the transmission rod is sequentially sleeved with a front lantern ring, a middle lantern ring and a rear lantern ring, and the front lantern ring, the middle lantern ring and the rear lantern ring are all fixed to the outer wall of the transmission rod. A plurality of soil cutting blades are arranged on the outer walls of the front lantern ring, the middle lantern ring and the rear lantern ring, and the soil cutting blades are evenly arranged on the corresponding front lantern ring, the middle lantern ring or the rear lantern ring around the axis of the transmission rod. Grooving is not needed, underground construction is conducted, disturbance of an underground soil layer structure can be reduced through multi-layer chambering, the service life and the quality of a road surface are guaranteed, rapid grading soil cutting and grading chambering pipeline back-dragging are adopted, the construction technology is simple, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically a horizontal directional drilling and hole enlargement pullback device for municipal roads. Background Technology

[0002] Municipal administration refers to all administrative and management work in a city, as well as market and trade affairs. Urban management includes industry and commerce, transportation, public security, education and culture, environment, sanitation, and infrastructure construction. Municipal roads refer to urban roads. Municipal roads are classified into five levels according to their location in the road network, traffic function, and service function along their route: expressways, arterial roads, secondary arterial roads, local roads, and intra-district roads. For complex construction sections of municipal roads involving pipelines or underground obstacles, trenching is typically used. However, trenching is difficult due to the complexity of underground pipeline networks, and trenching at major traffic intersections can easily disturb the original roadbed structure, causing longitudinal and transverse cracks, affecting the road's lifespan and traffic safety. Utility Model Content

[0003] The purpose of this invention is to overcome the problems mentioned in the background art and to provide a horizontal directional drilling and reaming device for municipal roads. This device can reduce the disturbance of underground soil structure and improve construction efficiency and quality.

[0004] The objective of this utility model is mainly achieved through the following technical solutions:

[0005] A horizontal directional drilling and reaming device for municipal roads includes a drive rod. A front collar, a middle collar, and a rear collar are sequentially fitted onto the outer wall of the drive rod, and all three collars are fixed to the outer wall of the drive rod. Several cutting blades are installed on the outer wall of each of the front, middle, and rear collars, and these blades are evenly distributed around the axis of the drive rod on the corresponding front, middle, or rear collar. For complex construction sections of municipal roads, such as those crossing pipelines or underground obstacles, trenching is typically used. However, trenching is difficult due to the complexity of underground pipeline networks, and trenching at major traffic intersections can easily disturb the original roadbed structure, causing longitudinal and transverse cracks, affecting the road's lifespan and traffic safety. To address the aforementioned issues, this solution proposes a horizontal directional drilling and reaming device for municipal roads. The device includes a drive rod with threaded sections at both ends for connection to other equipment, such as power equipment or a guide pulling mechanism. A front collar, a middle collar, and a rear collar are sequentially fitted onto the outer wall of the drive rod, and all three collars are fixed to the outer wall of the drive rod. This ensures that the front, middle, and rear collars will not move or fall off the drive rod during operation. Several cutting blades are mounted on the outer wall of each of the front, middle, and rear collars, and these blades are evenly distributed around the axis of the drive rod on the corresponding front, middle, or rear collar. The cutting edge of the soil cutting blade faces the axis of the drive rod, and all the cutting blades are the same size. They are distributed circumferentially along the corresponding front collar, middle collar, or rear collar. This allows for hole enlargement when the drive rod rotates and moves forward, reducing disturbance to the underground soil structure and improving construction efficiency and quality.

[0006] Furthermore, the number of cutting blades on the front, middle, and rear collars is the same. This ensures consistent efficiency with the soil layer during borehole enlargement. Each cutting blade on the middle collar is positioned along the centerline between adjacent cutting blades on the front collar, and each cutting blade on the rear collar is positioned along the centerline between adjacent cutting blades on the middle collar. This design ensures that the cutting blades quickly contact the soil layer during borehole enlargement, avoiding excessive resistance on the same cross-section and reducing waiting time. Once rotating, the gaps between the cutting blades become smaller, resulting in higher efficiency.

[0007] Furthermore, due to the large size of the rear collar, directly fitting it onto the outer wall of the transmission rod would result in excessive thickness, making it difficult to process and increasing weight, thus affecting the flexibility of the device. Therefore, a connecting rod is provided between the inner wall of the rear collar and the transmission rod, and the connecting rod is vertically fixed to both the inner wall of the rear collar and the outer wall of the transmission rod. The connecting rod serves as a component to fix the rear collar to the outer wall of the transmission rod, ensuring that the rear collar does not shift during operation.

[0008] Furthermore, since staged soil cutting and borehole enlargement are required, the outer diameter of the middle ring is set larger than that of the front ring, and the outer diameter of the rear ring is set larger than that of the middle ring. This allows for staged soil cutting and borehole enlargement, thereby reducing disturbance to the underground soil structure and improving construction efficiency and quality.

[0009] Furthermore, the drive rod is equipped with water spray holes, which are respectively located between the front collar and the middle collar, and between the middle collar and the rear collar. The water spray holes are connected to the inner cavity of the drive rod, enabling water to be sprayed out during soil cutting and hole enlargement to cool the cutting blades and flush out the cut soil.

[0010] In summary, compared with the prior art, this utility model has the following advantages: This utility model does not require trenching, can be constructed underground, and can reduce the disturbance of the underground soil structure by using multi-layer hole expansion, thus ensuring the life and quality of the road surface. Moreover, it adopts rapid graded soil cutting and graded hole expansion to pull back the pipeline, which simplifies the construction process and effectively improves construction efficiency. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] The names corresponding to the reference numerals in the attached figures are:

[0014] 1-Drive rod, 2-Front cutting blade, 3-Water spray hole, 4-Middle cutting blade, 5-Rear cutting blade, 6-Rear collar, 7-Connecting rod, 8-Middle collar, 9-Front collar. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0017] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0018] like Figure 1 As shown in the figure, a horizontal directional drilling and reaming device for municipal roads in this embodiment includes a transmission rod 1. The transmission rod 1 is hollow inside and open at both ends. Threaded sections are provided on the outer walls of both ends of the transmission rod 1 for connection with other equipment, such as power equipment, guide pulling mechanisms, etc. A front collar 9, a middle collar 8, and a rear collar 6 are sequentially fitted on the outer wall of the transmission rod 1. The front collar 9, the middle collar 8, and the rear collar 6 are all fixed to the outer wall of the transmission rod 1. This ensures that the front collar 9, the middle collar 8, and the rear collar 6 will not move or fall off the transmission rod 1 during operation. Since the rear collar 6 is relatively large, directly fitting it onto the outer wall of the transmission rod 1 would result in excessive thickness, making it difficult to process and increasing weight, thus affecting the flexibility of the device. Therefore, a connecting rod 7 is provided between the inner wall of the rear collar 6 and the transmission rod 1, and the connecting rod 7 is vertically fixed to the inner wall of the rear collar 6 and the outer wall of the transmission rod 1. The connecting rod 1 is a component that fixes the rear collar 6 to the outer wall of the transmission rod 1, ensuring that the rear collar 6 will not shift during operation.

[0019] Several cutting blades are provided on the outer walls of the front collar 9, the middle collar 8, and the rear collar 6, and the cutting blades are evenly arranged around the axis of the transmission rod 1 on the corresponding front collar 9, middle collar 8, or rear collar 6. For ease of description, the cutting blades on the front collar 9 are named front cutting blade 2, the cutting blades on the middle collar 8 are named middle cutting blade 4, and the cutting blades on the rear collar 6 are named rear cutting blade 5. The number of front cutting blades 2, middle cutting blades 4, and rear cutting blades 5 are all the same, which ensures that the efficiency of contact with the soil layer is maintained every time during hole enlargement. Each middle cutting blade 4 is set on the centerline between adjacent front cutting blades 2, and the rear cutting blades 5 are set on the centerline between adjacent middle cutting blades 4. As the device rotates and is dragged, it ensures that the cutting blades can contact the soil layer as quickly as possible during hole enlargement, avoiding large resistance on the same cross section and reducing waiting time. After rotation, the gap between the cutting blades is smaller and the efficiency is higher, solving the problem of staged hole enlargement and pullback for pipelines crossing roads in non-grooving processes.

[0020] Because staged soil cutting and borehole enlargement are required, the outer diameter of the middle collar 8 is set larger than that of the front collar 9, and the outer diameter of the rear collar 6 is set larger than that of the middle collar 8. This allows for staged soil cutting and borehole enlargement, thereby reducing disturbance to the underground soil structure and improving construction efficiency and quality.

[0021] The transmission rod 1 is equipped with water spray holes 3, which are respectively located between the front collar 9 and the middle collar 8, and between the middle collar 8 and the rear collar 6. The water spray holes 3 are connected to the inner cavity of the transmission rod 1, and can spray water during soil cutting and hole enlargement to cool the cutting blades and flush out the cut soil.

[0022] This solution can achieve the required borehole diameter in a single operation. The outer diameter of the front cutting blade 2, middle cutting blade 4, and rear cutting blade 5 is 100mm, resulting in a finished cutting surface diameter of 300mm, thus meeting the requirements for dragging borehole diameters in horizontal directional drilling pipelines ranging from 100-300mm. This solves the technical challenges of non-trenching construction of roadbeds, ensuring pavement life and quality, and effectively improving construction efficiency.

[0023] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A municipal road horizontal directional drilling expansion back reaming device characterized by: The transmission rod (1) is provided with a front sleeve ring (9), a middle sleeve ring (8) and a rear sleeve ring (6) in sequence, and the front sleeve ring (9), the middle sleeve ring (8) and the rear sleeve ring (6) are fixed to the outer wall of the transmission rod (1), and a plurality of soil cutting blades are arranged on the outer wall of the front sleeve ring (9), the middle sleeve ring (8) and the rear sleeve ring (6), and the soil cutting blades are uniformly arranged on the corresponding front sleeve ring (9), middle sleeve ring (8) or rear sleeve ring (6) around the axis of the transmission rod (1).

2. The municipal road horizontal directional drilling and expanding back-dragging device according to claim 1, characterized in that: The number of the soil cutting blades on the front sleeve ring (9), the middle sleeve ring (8) and the rear sleeve ring (6) is the same, and each soil cutting blade on the middle sleeve ring (8) is arranged on the middle line between the adjacent soil cutting blades on the front sleeve ring (9), and each soil cutting blade on the rear sleeve ring (6) is arranged on the middle line between the adjacent soil cutting blades on the middle sleeve ring (8).

3. The municipal road horizontal directional drilling and expanding back-dragging device according to claim 1, characterized in that: The inner wall of the rear sleeve ring (6) and the transmission rod (1) are provided with a connecting rod (7), and the connecting rod (7) is vertically fixed to the inner wall of the rear sleeve ring (6) and the outer wall of the transmission rod (1).

4. The municipal road horizontal directional drilling expansion back-dragging device according to claim 3, characterized in that: The outer diameter of the middle sleeve ring (8) is greater than the outer diameter of the front sleeve ring (9), and the outer diameter of the rear sleeve ring (6) is greater than the outer diameter of the middle sleeve ring (8).

5. The municipal road horizontal directional drilling expansion back pulling device according to claim 1, characterized in that: The transmission rod (1) is provided with a water spraying hole (3), and the water spraying hole (3) is arranged between the front sleeve ring (9) and the middle sleeve ring (8) and between the middle sleeve ring (8) and the rear sleeve ring (6).

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