CN215859999U

CN215859999U - Improved structure of guide drill bit

Info

Publication number: CN215859999U
Application number: CN202121918573.4U
Authority: CN
Inventors: 鲍洪锋; 周中吉; 倪铁军
Original assignee: Wuxi Double Horse Drilling Tools Co ltd
Current assignee: Wuxi Double Horse Drilling Tools Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-18
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses an improved structure of a guide drill bit, which comprises an outer shell and a probe, wherein the probe is arranged in an inner cavity of the outer shell, a signal transmitting groove communicated with the inner cavity is formed in the outer shell, a glass fiber reinforced plastic sleeve penetrates through the inner cavity of the outer shell, a fixed block is assembled at one end port of the glass fiber reinforced plastic sleeve, the fixed block and the glass fiber reinforced plastic sleeve are assembled in an interference fit mode to form a sealing cover, a plug is assembled at the other end port of the glass fiber reinforced plastic sleeve to enable the inside of the glass fiber reinforced plastic sleeve to form a closed space, and the probe penetrates through the inside of the glass fiber reinforced plastic sleeve to form isolation protection. Above-mentioned pilot bit's improvement structure has add glass steel sleeve to the probe, and glass steel sleeve can effectively protect the probe, and can not influence signal transmission, reforms transform simply, need not the colloid and seals, has guaranteed the function of the accurate location of pilot bit.

Description

Improved structure of guide drill bit

Technical Field

The utility model relates to the technical field of trenchless drilling pipe laying machinery, in particular to an improved structure of a guide drill bit.

Background

The direction controllable guide drill bit is one drilling tool for directional drilling pipe-laying drilling machine and has magnetic signal emitting probe inside it, and during drilling, the magnetic signal emitting probe emits signal and the ground receiver receives the signal to determine the position and path of the drill bit body and guide the drill bit to drill in the desired path. As shown in figure 2, the existing guide drill structure, the magnetic signal emission probe 1 'is loaded in the iron shell 2', in order to ensure the smooth signal transmission, the iron shell 2 'is provided with a notch 3', but in order to prevent the external water and the silt from entering, the notch 3 'is filled with a colloid 4' such as AB glue, and in the using process, the colloid 4 'can age gradually and fall off, so that the sealing performance is invalid, and the function of the probe 1' is influenced.

SUMMERY OF THE UTILITY MODEL

Based on the above problems, the present invention aims to provide an improved structure of a pilot bit, which can improve the protection capability of a probe and ensure the function of the probe.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an improvement structure of guide bit, it includes shell body and probe, the probe sets up in the inner chamber of shell body, set up the signalling groove that communicates to the inner chamber on the shell body, wear to be equipped with glass steel sleeve in the inner chamber of shell body, glass steel sleeve's one end port is equipped with the fixed block, the fixed block forms the closing cap with glass steel sleeve interference fit, glass steel sleeve's other end port is equipped with the end cap, make glass steel sleeve's inside form airtight space, thereby the probe wears to locate glass steel sleeve's inside formation isolation protection.

Preferably, the plug is provided with a top pressing block in threaded connection with the plug, one end of the top pressing block extends into the glass fiber reinforced plastic sleeve, the end part of the top pressing block is provided with a compression spring acting on the surface of the probe, and the compression spring presses the probe against the fixing block.

Preferably, the outer shell is provided with a locking bolt which extends inwards and is fixedly connected with the fixed block.

Preferably, the outer shell is provided with an opening penetrating the glass fiber reinforced plastic sleeve, the fixing block is in threaded connection with the opening, and the opening is provided with a sealing ring.

In conclusion, the improved structure of the guide drill bit has the advantages that the glass fiber reinforced plastic sleeve is additionally arranged on the probe, the probe can be effectively protected by the glass fiber reinforced plastic sleeve, signal transmission cannot be influenced, the improvement is simple, colloid sealing is not needed, and the function of accurate positioning of the guide drill bit is guaranteed.

Drawings

FIG. 1 is a schematic view of an improved configuration of a pilot bit provided by an embodiment of the present invention;

fig. 2 is a schematic structural view of a conventional pilot bit.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, an indirect connection via an intermediary, a communication between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Please refer to fig. 1, the preferred embodiment provides an improved structure of a pilot bit, which includes an outer casing 1 and a probe 2, wherein the probe 2 is disposed in an inner cavity of the outer casing 1, the outer casing 1 is provided with a signal transmitting slot 3 communicated to the inner cavity, especially, a glass fiber reinforced plastic sleeve 4 is disposed in the inner cavity of the outer casing 1 in a penetrating manner, a fixing block 5 is assembled at a port at one end of the glass fiber reinforced plastic sleeve 4, the fixing block 5 and the glass fiber reinforced plastic sleeve 4 are assembled in an interference manner to form a sealing cover, a plug 6 is assembled at a port at the other end of the glass fiber reinforced plastic sleeve 4 to form a closed space inside the glass fiber reinforced plastic sleeve 4, and the probe 2 is disposed in the glass fiber reinforced plastic sleeve 4 in a penetrating manner to form an isolation protection.

The plug 6 is provided with a top pressing block 7 in threaded connection with the plug, one end of the top pressing block 7 extends into the glass fiber reinforced plastic sleeve 4, the end part of the top pressing block is provided with a compression spring 8 acting on the surface of the probe 2, and the compression spring 8 presses the probe 2 against the fixed block 5, so that the position of the probe 2 in the glass fiber reinforced plastic sleeve 4 is stable.

And a locking bolt 9 which extends inwards and is fixedly connected with the fixed block 5 is arranged on the outer shell 1, so that the position of the fixed block 5 is stable.

An opening penetrating into the glass fiber reinforced plastic sleeve 4 is formed in the outer shell 1, the fixing block 5 is in threaded connection with the opening, a sealing ring 10 is arranged at the opening, and the sealing performance of the opening is improved.

It is worth integratively, owing to glass steel sleeve 4's existence, saved the setting of colloid, then the size of signal emission groove can suitably be dwindled originally, optimizes the overall structure nature of pilot bit.

To sum up, foretell pilot bit's improvement structure has add glass steel sleeve to the probe, and glass steel sleeve can effectively protect the probe, and can not influence signal transmission, reforms transform simply, need not the colloid and seals, has guaranteed the accurate locate function of pilot bit.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the utility model, which are intended to be within the scope of the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The improved structure of the guide drill bit comprises a shell and a probe, wherein the probe is arranged in an inner cavity of the shell, and a signal transmitting groove communicated to the inner cavity is formed in the shell.

2. The improved structure of a pilot bit according to claim 1, wherein: the plug is provided with a top pressing block in threaded connection with the plug, one end of the top pressing block extends into the glass fiber reinforced plastic sleeve, the end part of the top pressing block is provided with a compression spring acting on the surface of the probe, and the compression spring presses the probe against the fixed block.

3. The improved structure of a pilot bit according to claim 1, wherein: and the outer shell is provided with a locking bolt which extends inwards and is fixedly connected with the fixed block.

4. The improved structure of a pilot bit according to claim 1, wherein: the outer shell is provided with an opening penetrating through the glass fiber reinforced plastic sleeve, the fixing block is in threaded connection with the opening, and the opening is provided with a sealing ring.