A fresh water main non-excavation drill

Abstract

The utility model discloses a fresh water main pipe non -excavation type drilling rig, including head pole, the drill bit of rotation connection in the head pole front end, the connecting rod of connection in the rear end of head pole, connecting assembly, including fixed in the rear end of head pole and can with the threaded connector of connecting rod end portion screw connection, fixed in the end portion of head pole and encircle the sealing insert sleeve of threaded connector outside, open in the end portion of connecting rod and can with the sealing of sealing insert sleeve and insert the sealing slot of joint, connecting assembly still include the sealing sleeve, through connecting assembly, can realize the fixed connection between head pole and connecting rod, and the design of threaded connector, sealing insert sleeve, sealing slot and sealing sleeve etc. Structure can promote the sealing of junction, when the drill rod is in the underground excavation, can play effective sealing protection to junction, prevent the sandstone mud into the clearance inside junction, on the one hand is favorable to maintain the connection stability, on the other hand is favorable to carry out the maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of drilling tool technology, specifically relating to a non-excavation drilling tool for freshwater headers. Background Technology

[0002] As the core trunk line of the freshwater transportation system, the freshwater main pipeline undertakes critical transportation tasks such as domestic water supply, industrial water supply, and ecological water replenishment for rivers along the riverbanks, and is an important infrastructure to ensure a stable supply of regional water resources. For a long time, freshwater main pipeline repair has primarily relied on open-cut construction methods, requiring large-scale earthmoving operations. This not only easily leads to landslide risks and damages the surface ecosystem but also disrupts traffic and surrounding life, and is time-consuming and costly. In contrast, trenchless technology, with its advantages of minimal surface disturbance and high construction efficiency, is gradually replacing traditional methods. Through directional drilling and other techniques, pipeline repair can be completed with minimal excavation. Directional drilling, also known as horizontal directional drilling (HDD), is the core drilling tool of trenchless technology. Using a directional drill bit with signal transmission, it precisely controls the drilling trajectory, and after directional drilling and borehole enlargement, it pulls the pipeline into the hole. It can flexibly cross obstacles such as rivers and roads, significantly reducing environmental impact, and has become the mainstream equipment for freshwater main pipeline repair.

[0003] In existing directional drilling, drill rods are mostly fixed by direct threaded connection. The connection structure between the two is relatively simple and straightforward. When the drill rod is drilling underground, underground sand, gravel, mud and other materials can easily enter the gap of the threaded connection. On the one hand, it affects the stability of the connection, and on the other hand, it is not conducive to the maintenance of the connection. Therefore, a new drilling tool needs to be designed to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a freshwater header trenchless drilling tool to solve the problems mentioned in the background art, such as the generally poor sealing effect at the connection of the drill rods in existing directional drilling, which makes it easy for sand, gravel, mud, etc. to enter, affecting the connection stability and service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-excavation drilling tool for freshwater main pipes, comprising... The head rod, the drill bit rotatably connected to the front end of the head rod, and the connecting rod connected to the rear end of the head rod; The connecting assembly includes a threaded connector fixed to the rear end of the head rod and threadedly connected to the end of the connecting rod, a sealing sleeve fixed to the end of the head rod and surrounding the outside of the threaded connector, and a sealing slot opened at the end of the connecting rod and insertable into the sealing sleeve. The connecting assembly also includes a sealing sleeve, which is fixedly attached to the opposite end surfaces of the connecting rod and the head rod.

[0006] Preferably, the sealing sleeve has a ring-shaped structure in side view, and the sealing slot also has a ring-shaped structure in side view, and is adapted to the outer surface of the sealing sleeve.

[0007] Preferably, the connecting assembly further includes a retaining ring, which is fixed to the inner end of the sealing slot.

[0008] Preferably, the drill bit includes a main body rotatably connected to the front end of the head rod and a drill disc connected to the front end of the main body, and there is an inclination angle between the head rod and the main body.

[0009] Preferably, the surface of the head rod is provided with an auxiliary drilling assembly, including a drill seat that is rotatably sleeved on the surface of the head rod and a protrusion fixed on the surface of the drill seat.

[0010] Preferably, the auxiliary drilling assembly further includes a discharge groove, which is formed on the outer surface of the drill base.

[0011] Preferably, the bump has a frustum-shaped cross-section, and the inclined side of the bump faces the drill bit.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The connecting components enable a fixed connection between the head rod and the connecting rod. The design of the threaded connector, sealing sleeve, sealing slot, and sealing sleeve improves the sealing performance of the connection. When the drill rod is excavating underground, it can effectively seal and protect the connection, preventing sand and mud from entering the gap between the connection points. This helps maintain connection stability and facilitates maintenance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the drill bit of this utility model; Figure 3 This is a front sectional view of the connecting component of this utility model; Figure 4 This utility model Figure 3 Enlarged view of area A in the middle; Figure 5 This is a three-dimensional schematic diagram of the auxiliary drilling assembly of this utility model; In the diagram: 100, head rod; 200, drill bit; 201, main body; 202, drill disc; 300, connecting rod; 400, connecting assembly; 401, threaded connector; 402, sealing sleeve; 403, sealing slot; 404, sealing sleeve; 405, retaining ring; 500, auxiliary drilling assembly; 501, drill base; 502, protrusion; 503, discharge chute. Detailed Implementation

[0014] 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.

[0015] Example Please see Figures 1 to 5 This embodiment provides a technical solution: a trenchless drilling tool for freshwater headers, comprising... The head rod 100, the drill bit 200 rotatably connected to the front end of the head rod 100, and the connecting rod 300 connected to the rear end of the head rod 100 are all connected in sequence to the rear end of the head rod 100. There is one head rod 100 and multiple connecting rods 300. The connecting assembly 400 includes a threaded connector 401 fixed to the rear end of the head rod 100 and threadedly connected to the end of the connecting rod 300; a sealing sleeve 402 fixed to the end of the head rod 100 and surrounding the outside of the threaded connector 401; and a sealing slot 403 formed at the end of the connecting rod 300 and insertable into the sealing sleeve 402. The connection between the threaded connector 401 and the connecting rod 300 is sealed and protected by the insertion between the sealing sleeve 402 and the sealing slot 403. Subsequent connecting rods 300 can also be connected to each other through the connecting assembly 400. The connecting assembly 400 also includes a sealing sleeve 404, which is fixedly attached to the opposite end surfaces of the connecting rod 300 and the head rod 100. The sealing sleeves 404 can be squeezed together to ensure a good sealing effect.

[0016] In this embodiment, preferably, the sealing sleeve 402 has a ring-shaped structure when viewed from the side, and the sealing slot 403 also has a ring-shaped structure when viewed from the side, and is adapted to the outer surface of the sealing sleeve 402 to ensure a good sealing effect.

[0017] In this embodiment, preferably, the connecting component 400 further includes a retaining ring 405, which is fixed to the inner end of the sealing slot 403. When the sealing slot 403 and the sealing sleeve 402 are inserted, the retaining ring 405 can play a buffering and protective role.

[0018] In this embodiment, preferably, the drill bit 200 includes a main body 201 rotatably connected to the front end of the head rod 100 and a drill disc 202 connected to the front end of the main body 201. There is a 5-degree inclination angle between the head rod 100 and the main body 201. The head rod 100 is equipped with a motor A that can drive the drill bit 200 to rotate. When the motor A drives the drill bit 200 to rotate, the entire drill rod can be made to dig in a straight line. When the drill bit 200 does not rotate, the entire drill rod can be made to dig along a curve because the drill bit 200 has an inclination angle. In this way, the drill rod can be controlled to perform directional drilling.

[0019] In this embodiment, preferably, the surface of the head rod 100 is provided with an auxiliary drilling assembly 500, including a drill seat 501 rotatably sleeved on the surface of the head rod 100 and a protrusion 502 fixed on the surface of the drill seat 501. The head rod 100 is provided with a motor B that can drive the drill seat 501 to rotate. During tunneling, the auxiliary drilling assembly 500 rotates, which can break the solid block drilled down by the drill bit 200 a second time.

[0020] In this embodiment, preferably, the auxiliary drilling assembly 500 further includes a discharge chute 503, which is formed on the outer surface of the drill base 501 and is used to discharge debris or mud.

[0021] In this embodiment, preferably, the protrusion 502 has a frustum-shaped cross section, and the inclined side of the protrusion 502 faces the drill bit 200, which is more conducive to the drilling rod excavation.

[0022] Although embodiments of the present invention have been shown and described (see the detailed description above), 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 trenchless drilling tool for freshwater headers, characterized in that: include The head rod (100), the drill bit (200) rotatably connected to the front end of the head rod (100), and the connecting rod (300) connected to the rear end of the head rod (100). The connecting assembly (400) includes a threaded connector (401) fixed to the rear end of the head rod (100) and threaded to the end of the connecting rod (300), a sealing sleeve (402) fixed to the end of the head rod (100) and surrounding the outside of the threaded connector (401), and a sealing slot (403) opened at the end of the connecting rod (300) and inserted into the sealing sleeve (402). The connecting assembly (400) also includes a sealing sleeve (404) which is fixedly attached to the opposite end surfaces of the connecting rod (300) and the head rod (100).

2. The non-excavation drilling tool for freshwater headers according to claim 1, characterized in that: The sealing sleeve (402) has a ring-shaped structure when viewed from the side, and the sealing slot (403) also has a ring-shaped structure when viewed from the side, and is adapted to the outer surface of the sealing sleeve (402).

3. The non-excavation drilling tool for freshwater headers according to claim 2, characterized in that: The connecting assembly (400) also includes a retaining ring (405) fixed to the inner end of the sealing slot (403).

4. The non-excavation drilling tool for freshwater headers according to claim 3, characterized in that: The drill bit (200) includes a main body (201) rotatably connected to the front end of the head rod (100) and a drill disk (202) connected to the front end of the main body (201). There is a 5-degree inclination angle between the head rod (100) and the main body (201).

5. A non-excavation drilling tool for freshwater headers according to claim 4, characterized in that: The head rod (100) is provided with an auxiliary drilling assembly (500), including a drill seat (501) that is rotatably sleeved on the surface of the head rod (100) and a protrusion (502) fixed on the surface of the drill seat (501).

6. A non-excavation drilling tool for freshwater headers according to claim 5, characterized in that: The auxiliary drilling assembly (500) also includes a discharge groove (503), which is formed on the outer surface of the drill base (501).

7. A non-excavation drilling tool for freshwater main pipes according to claim 6, characterized in that: The protrusion (502) has a frustum-shaped cross section, and the inclined side of the protrusion (502) faces the drill bit (200).

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