Novel water tail shell

Abstract

The utility model provides a novel water tail shell, which belongs to the technical field of drilling machine accessories and comprises a hollow structure formed by sequentially connecting a water pipe connector, a fixed connector, a rotary connector and a drill rod connector. The second end of the water pipe connector is fixedly connected with the first end of the fixed connector; the rotary joint penetrates through the second end of the fixed joint, the outer wall is rotationally connected with the inner wall of the fixed joint through a bearing, the first end is rotationally inserted into the water pipe connecting joint, and an external thread is arranged on the outer wall close to the second end; the inner wall, close to the first end, of the drill rod connector is provided with internal threads, the outer wall, close to the second end, of the drill rod connector is provided with external threads, and the internal threads of the drill rod connector are connected with the external threads of the rotary connector. The utility model discloses the versatility is stronger.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling rig accessories, and specifically discloses a new type of water tail housing. Background Technique

[0002] The long-hole directional kilometer drilling rig for mine use is mainly used for gas drainage and water exploration in coal mines. Its working principle is that the high-pressure water after pressurization flows through the drill pipe to the top to drive the drill bit to rotate, drill a hole, and then carry out gas drainage and related operations. The drill pipe is generally a high-strength steel pipe with a length of 3m, and its internal space is partitioned into a signal sensing space and a high-pressure water flow space through triangular wings, etc. The tail of the drill pipe requires professional tools for the transportation of high-pressure water and the transmission of electrical signals, that is, the so-called water tail.

[0003] CN208594870U applied by the applicant discloses a new type of water tail device, which can isolate the transportation of high-pressure water and the transmission of electrical signals, and improve the safety of production. During the use process, it is found that the following problems still need to be improved in the above patent:

[0004] Since drill pipes with different outer diameters need to be frequently replaced during the drilling process, and the second housing connected to the drill pipe in the above patent adopts an integral structure, different models of water tails need to be prepared according to the drill pipe models, and the versatility needs to be improved. Content of the Utility Model

[0005] The utility model provides a new type of water tail housing to improve the technical problems described in the background technique.

[0006] The utility model provides a new type of water tail housing, which includes a hollow structure formed by sequentially connecting a water pipe connection joint, a fixed joint, a rotary joint, and a drill pipe connection joint; the second end of the water pipe connection joint is fixedly connected to the first end of the fixed joint; the rotary joint passes through the second end of the fixed joint, and the outer wall is rotatably connected to the inner wall of the fixed joint through a bearing. The first end is rotatably inserted into the water pipe connection joint, and an external thread is provided on the outer wall near the second end; an internal thread is provided on the inner wall near the first end of the drill pipe connection joint, and an external thread is provided on the outer wall near the second end. The internal thread of the drill pipe connection joint is connected to the external thread of the rotary joint.

[0007] The above new type of water tail housing further includes a positioning screw; the second end of the water pipe connection joint is a stepped convex surface structure; the first end of the fixed joint is a stepped concave surface structure; the stepped convex surface structure and the stepped concave surface structure are meshed with each other; the positioning screw is arranged radially along the water pipe connection joint and the fixed joint, and passes through the fixed joint and is screwed into the water pipe connection joint.

[0008] In the above new type of water tail housing, a Gleitring Ⅰ is provided between the first end of the rotary joint and the water pipe connection joint; a Gleitring Ⅱ is provided between the rotary joint and the second end of the fixed joint.

[0009] In the above-mentioned novel water tail housing, an O-ring seal I is provided between the stepped convex surface structure and the stepped concave surface structure; an O-ring seal II is provided between the rotary joint and the drill pipe connection joint.

[0010] In the above-mentioned novel water tail housing, a dust seal is provided at the second end of the rotary joint and the fixed joint, and the dust seal is located outside the Gleason ring II.

[0011] In the above-mentioned novel water tail housing, the outer wall of the rotary joint and the inner wall of the fixed joint are rotationally connected by tapered roller bearings.

[0012] In the above-mentioned novel water tail housing, the first end of the water pipe connection joint is a quick-insert structure.

[0013] Compared with the prior art, the present utility model has the following beneficial effects.

[0014] 1. In the above-mentioned novel water tail housing, the rotary joint and the drill pipe connection joint adopt a separable threaded connection method, and the drill pipe connection joint can be replaced according to the drill pipe model to achieve adaptation to the drill pipe. Compared with the new water tail device disclosed in CN208594870U, the versatility is stronger.

[0015] 2. In the above-mentioned novel water tail housing, the water pipe connection joint and the fixed joint are positioned and fixed by concave-convex stepped surfaces and positioning screws, with accurate positioning and rapid installation.

[0016] 3. The multiple sealing structures effectively prevent water leakage during rotation.

[0017] 4. Tapered roller bearings are selected to simultaneously bear the combined radial and axial loads, making the rotation of the rotary joint more stable and indirectly extending the service life of the rotary seal; compared with deep groove ball bearings, the installation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the external structure of the novel water tail housing;

[0020] Figure 2 It is a schematic diagram of the internal structure of the novel water tail housing.

[0021] In the figure: 1 - water pipe connection joint; 2 - fixed joint; 3 - rotary joint; 4 - drill pipe connection joint; 5 - positioning screw; 6 - tapered roller bearing; 7 - Gleitring Ⅰ; 8 - Gleitring Ⅱ; 9 - O-ring seal Ⅰ; 10 - O-ring seal Ⅱ; 11 - dust seal. Specific implementation manner

[0022] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] This embodiment provides a novel water tail housing, including a water pipe connection joint 1, a fixed joint 2, a rotary joint 3, a drill pipe connection joint 4, a positioning screw 5, a tapered roller bearing 6, a Gleitring Ⅰ 7, a Gleitring Ⅱ 8, an O-ring seal Ⅰ 9, an O-ring seal Ⅱ 10, and a dust seal 11.

[0024] The second end of the water pipe connection joint 1 is fixedly connected to the first end of the fixed joint 2; the rotary joint 3 passes through the second end of the fixed joint 2, and the outer wall is rotationally connected to the inner wall of the fixed joint 2. The first end is rotatably inserted into the water pipe connection joint 1, and an external thread is provided on the outer wall near the second end; an internal thread is provided on the inner wall of the drill pipe connection joint 4 near the first end, and an external thread is provided on the outer wall near the second end. The internal thread of the drill pipe connection joint 4 is connected to the external thread of the rotary joint 3 to achieve separability, and the external thread of the drill pipe connection joint 4 is connected to the drill pipe. The water pipe connection joint 1, the fixed joint 2, the rotary joint 3, and the drill pipe connection joint 4 are sequentially connected to form a hollow structure, and the inside is used as a water supply chamber and a signal chamber to install water supply parts and signal parts.

[0025] The second end of the water pipe connection joint 1 is a stepped convex surface structure; the first end of the fixed joint 2 is a stepped concave surface structure; the stepped convex surface structure and the stepped concave surface structure are meshed with each other; the positioning screw 5 is arranged radially along the water pipe connection joint 1 and the fixed joint 2, passes through the fixed joint 2 and is screwed into the water pipe connection joint 1 to achieve the fixed connection between the water pipe connection joint 1 and the fixed joint 2.

[0026] The outer wall of the rotary joint 3 is rotationally connected to the inner wall of the fixed joint 2 through a tapered roller bearing 6. The tapered roller bearing 6 is selected to bear the combined load of radial and axial directions at the same time, making the rotation of the rotary joint 3 more stable, indirectly extending the service life of the rotary seal; compared with the deep groove ball bearing, the installation is simpler.

[0027] The Grubbs seal Ⅰ 7 is arranged between the first end of the rotary joint 3 and the water pipe connection joint 1, and the Grubbs seal Ⅱ 8 is arranged between the rotary joint 3 and the second end of the fixed joint 2, jointly constituting a rotary dynamic seal. The Grubbs seal is more wear-resistant and has a better sealing effect. One is installed on both sides of the rotary joint 3 for double insurance to prevent water leakage during rotation.

[0028] The O-ring seal Ⅰ 9 is arranged between the stepped convex surface structure and the stepped concave surface structure to prevent water leakage after the failure of the Grubbs seal Ⅰ 7. The O-ring seal Ⅱ 10 is arranged between the rotary joint and the drill pipe connection joint as a static seal to prevent water leakage.

[0029] The dust seal 11 is arranged between the rotary joint 3 and the second end of the fixed joint 2. The dust seal 11 is located outside the Grubbs seal Ⅱ 8 to prevent dirt and impurities from entering the Grubbs seal Ⅱ 8 and damaging the rotary seal.

[0030] The first end of the water pipe connection joint 1 is a quick-insert structure, which is convenient for the connection of underground pipelines and improves efficiency.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of water tail shell, characterized in that: It comprises a hollow structure formed by sequentially connecting a water pipe connection joint, a fixed joint, a rotating joint and a drill pipe connection joint; The second end of the water pipe connecting joint is fixedly connected to the first end of the fixed joint; The rotating joint passes through the second end of the fixed joint, the outer wall is rotatably connected to the inner wall of the fixed joint through a bearing, the first end is rotatably inserted in the water pipe connecting joint, and the outer wall near the second end is provided with an external thread; The inner wall of the drill rod connecting joint close to the first end is provided with an internal thread, and the outer wall close to the second end is provided with an external thread. The internal thread of the drill rod connecting joint is connected with the external thread of the rotary joint.

2. The novel water tail shell according to claim 1 is characterized in that: Also included are set screws; The second end of the water pipe connection joint is a stepped convex structure; The first end of the fixed joint is a stepped concave structure; The step-shaped convex surface structure and the step-shaped concave surface structure are meshed with each other; The positioning screws are arranged along the radial direction of the water pipe connecting joint and the fixed joint, and pass through the fixed joint and are screwed into the water pipe connecting joint.

3. The novel water tail shell according to claim 2 is characterized in that: A Glay ring I is provided between the first end of the rotary joint and the water pipe connection joint; A Glay ring II is arranged between the rotary joint and the second end of the fixed joint.

4. The novel water tail shell according to claim 3 is characterized in that: An O-type sealing ring I is arranged between the step-shaped convex surface structure and the step-shaped concave surface structure; An O-ring II is provided between the rotary joint and the drill pipe connecting joint.

5. The novel water tail shell according to claim 4 is characterized in that: The second ends of the rotating joint and the fixed joint are provided with dust seals, and the dust seals are located outside the Gray Ring II.

6. The novel water tail housing according to any one of claims 1 to 5, characterized in that: The outer wall of the rotating joint is rotatably connected to the inner wall of the fixed joint via a tapered roller bearing.

7. The novel water tail shell according to claim 1 is characterized in that: The first end of the water pipe connecting joint is a quick-insert structure.

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