External water supply connector for drilling machine

Abstract

The utility model relates to an external water supply connector for a drilling machine. The external water supply connector comprises a connecting shaft used for transmitting torque between the drilling machine and a drill bit, an outer shell, two rotary sealing sets, a water supply valve and a quick connector. The connecting shaft is rotatably mounted on the outer shell through the rotary sealing group; the rotary sealing group comprises a bearing, a framework oil seal and a dustproof check ring; the framework oil seal is located between the dustproof check ring and the bearing. A water guide cavity is formed between the connecting shaft and the outer shell; the dustproof check ring is arranged on the side, close to the water guide cavity, of the rotary sealing set. The water supply valve is arranged on the outer shell; the quick connector is mounted to the water supply valve; an axial water guide hole and a radial water guide hole are formed in the connecting shaft; water passes through the quick connector and the water supply valve and then is guided out to the drill bit through the water guide cavity, the radial water guide hole and the axial water guide hole. The utility model has the beneficial effect that the wet drilling function is realized by adding an external water supply pipeline to the drilling machine.

Description

Technical Field

[0001] The utility model relates to an external water supply joint for a drilling rig. Background Art

[0002] A drilling rig is an engineering equipment for drilling holes, which is used for coring concrete, stone, wall bricks, etc. Existing drilling rigs do not have a wet drilling function. So, how to add a wet drilling function to a drilling rig without a wet drilling function is a technical problem to be solved by those skilled in the art. Utility Model Content

[0003] The utility model aims to provide an external water supply joint for a drilling rig to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An external water supply joint for a drilling rig comprises: a connecting shaft for transmitting torque between the drilling rig and a drill bit, an outer shell, two rotating seal groups, a water supply valve and a quick connector; the connecting shaft is rotatably mounted to the outer shell through the rotating seal group; the rotating seal group comprises: a bearing, a skeleton oil seal and a dustproof retaining ring; the skeleton oil seal is located between the dustproof retaining ring and the bearing; a water guide cavity is formed between the connecting shaft and the outer shell; the dustproof retaining ring is arranged on a side of the rotating seal group close to the water guide cavity; the water supply valve is mounted to the outer shell; the quick connector is mounted to the water supply valve; the connecting shaft is formed with an axial water guide hole and a radial water guide hole; water passes through the quick connector, the water supply valve, and then is guided to the drill bit through the water guide cavity, the radial water guide hole and the axial water guide hole.

[0006] As a further solution of the utility model: the connecting shaft is formed by two radial water guide holes intersecting each other; the intersection position of the two radial water guide holes is located on the axial water guide hole.

[0007] As a further solution of the utility model: the middle part of the connecting shaft is contracted so as to form a water guide cavity between the connecting shaft and the outer shell.

[0008] As a further solution of the utility model: the radial water guide hole is arranged at the middle contraction part of the connecting shaft.

[0009] As a further solution of the utility model: both ends of the connecting shaft are respectively provided with threaded structures connected to the drilling rig and the drill bit.

[0010] As a further solution of the utility model: the water supply valve is installed to the outer shell by means of a threaded connection; the quick connector is installed to the water supply valve by means of a threaded connection.

[0011] As a further solution of the utility model: an O-type sealing ring is provided on the outer wall surface of the quick connector.

[0012] Compared with the prior art, the utility model has the beneficial effect of realizing the wet drilling function by adding an external water supply pipeline to the drilling rig.

[0013] The dustproof retaining ring cooperates with the skeleton oil seal to meet the joint sealing function during water supply.

[0014] There is a bearing on each side of the oil seal to ensure free and flexible rotation when the drill is drilling.

[0015] Setting a water supply valve facilitates the control of water supply.

[0016] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of an external water supply joint for a drilling rig of the utility model;

[0018] Figure 2 yes Figure 1 A left view of an external water supply connector for a drilling rig;

[0019] Figure 3 yes Figure 1 A schematic diagram of the internal structure of an external water supply joint for a drilling rig;

[0020] Figure 4 yes Figure 1 A stereoscopic view of an external water supply connector for a drilling rig.

[0021] List of reference numerals: external water supply joint 100 for drilling rig, connecting shaft 10, axial water guide hole 11, radial water guide hole 12, outer shell 20, water guide cavity 21, rotating seal group 30, bearing 31, skeleton oil seal 32, dustproof retaining ring 33, water supply valve 40, quick connector 50. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4In an embodiment of the utility model, an external water supply joint 100 for a drilling rig includes: a connecting shaft 10, an outer shell 20, two rotating seal groups 30, a water supply valve 40 and a quick connector 50. The connecting shaft 10 is used to transmit torque between the drilling rig and the drill bit. The connecting shaft 10 is rotatably mounted to the outer shell 20 through the rotating seal group 30. The rotating seal group 30 includes: a bearing 31, a skeleton oil seal 32 and a dustproof ring 33. The skeleton oil seal 32 is located between the dustproof ring 33 and the bearing 31. A water guide cavity 21 is formed between the connecting shaft 10 and the outer shell 20. The dustproof ring 33 is arranged on one side of the rotating seal group 30 close to the water guide cavity 21. The water supply valve 40 is mounted to the outer shell 20. The quick connector 50 is mounted to the water supply valve 40. The connecting shaft 10 is formed with an axial water guide hole 11 and a radial water guide hole 12. The water passes through the quick connector 50 and the water supply valve 40 , and then is discharged to the drill bit through the water guide cavity 21 , the radial water guide holes 12 and the axial water guide holes 11 .

[0024] As a specific implementation method, an external water supply pipeline is added to the drilling rig through a quick connector 50 to realize the wet drilling function.

[0025] Specifically, the dustproof ring 33 cooperates with the skeleton oil seal 32 to meet the joint sealing function during water supply. A bearing 31 is provided on each side of the oil seal to meet the free and flexible rotation of the drilling rig during drilling. A water supply valve 40 is provided to facilitate the control of water supply.

[0026] As a specific implementation, the connecting shaft 10 is formed with two mutually intersecting radial water guide holes 12. The intersection of the two radial water guide holes 12 is located on the axial water guide hole.

[0027] As a specific implementation, the middle portion of the connecting shaft 10 is contracted so as to form a water guiding cavity 21 between the connecting shaft 10 and the outer shell 20 .

[0028] As a specific implementation, the radial water guide hole 12 is arranged at the middle contraction portion of the connecting shaft 10 .

[0029] As a specific implementation, both ends of the connecting shaft 10 are respectively provided with threaded structures connected to the drilling rig and the drill bit.

[0030] As a specific implementation, the water supply valve 40 is installed to the outer shell 20 by means of threaded connection. The quick connector 50 is installed to the water supply valve 40 by means of threaded connection.

[0031] As a specific implementation, an O-ring is disposed on the outer wall surface of the quick connector 50 .

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An external water supply joint for a drilling rig, characterized in that: include: A connecting shaft for transmitting torque between the drilling rig and the drill bit, an outer casing, two rotating seal groups, a water supply valve and a quick connector; The connecting shaft is rotatably mounted to the outer shell through the rotating seal group; the rotating seal group includes: a bearing, a skeleton oil seal and a dustproof ring; the skeleton oil seal is located between the dustproof ring and the bearing; a water guide cavity is formed between the connecting shaft and the outer shell; the dustproof ring is arranged on the side of the rotating seal group close to the water guide cavity; the water supply valve is mounted to the outer shell; the quick connector is mounted to the water supply valve; an axial water guide hole and a radial water guide hole are formed on the connecting shaft; water passes through the quick connector, the water supply valve, and then is discharged to the drill bit through the water guide cavity, the radial water guide hole and the axial water guide hole.

2. The external water supply joint for a drilling rig according to claim 1, characterized in that: The connecting shaft is formed by two radial water guide holes intersecting each other; the intersection position of the two radial water guide holes is located on the axial water guide hole.

3. The external water supply joint for a drilling rig according to claim 1, characterized in that: The middle portion of the connecting shaft contracts to form the water guiding cavity between the connecting shaft and the outer shell.

4. The external water supply joint for a drilling rig according to claim 3, characterized in that: The radial water guide hole is arranged at the middle contraction position of the connecting shaft.

5. The external water supply joint for a drilling rig according to claim 1, characterized in that: The two ends of the connecting shaft are respectively provided with thread structures connected with the drilling rig and the drill bit.

6. The external water supply joint for a drilling rig according to claim 1, characterized in that: The water supply valve is installed to the outer shell by means of a threaded connection; the quick connector is installed to the water supply valve by means of a threaded connection.

7. The external water supply joint for a drilling rig according to claim 1, characterized in that: An O-type sealing ring is arranged on the outer wall surface of the quick connector.

Images