CN207598192U - A kind of drilling machine water becomes head pressurization leakage-proof liquid device - Google Patents

Abstract

The utility model discloses a pressurized anti-leakage device for a drilling rig water variable head. The double-channel sealing structure uses a metal dish ring as the main seal, which has the characteristics of small fastening load and extremely low sealing leakage rate. The O-ring is used as an auxiliary seal to provide a secondary seal for possible water leakage, thereby improving the reliability of the overall seal. After the installation of the pressurized anti-leakage device at the tail of the drilling rig, the water leakage at the connection gap can be greatly reduced, thereby improving the drilling efficiency. The water pressure in the hole provides guarantee for the quality of drilling construction and the effect of gas drainage, and has broad market prospects.

Description

A pressurization and anti-leakage device for hydraulic variable head of drilling rig

technical field

The utility model relates to the field of pressurized and anti-leakage devices for hydraulic heads of drilling rigs, in particular to a pressurized and anti-leakage device for hydraulic heads of drilling rigs.

Background technique

During the construction of the underground drilling rig, the water variable head is often used at the tail to guide the water. Its function is to reduce the dust content in the air when the drill hole penetrates the rock. To achieve the purpose of reducing the stress of the coal body and increasing the amount of gas extraction. However, there is a certain connection gap when the water variable head used at present is connected to the drill pipe, which causes a large amount of water to be ejected from the tail of the drill pipe, which greatly reduces the water pressure in the hole, and then greatly reduces the effect of coal flushing and pressure relief. , has seriously affected the gas drainage and safe production of the mine.

Utility model content

The technical problem to be solved by the utility model is to provide a pressure-leakage prevention device for hydraulic heads of drilling rigs, so as to solve the problem in the prior art that the effect of coal flushing and pressure relief is not good.

In order to achieve the above purpose, the utility model provides the following technical solutions: a pressurized anti-leakage device for the variable head of the drilling rig, and the pressurized anti-leakage device for the variable head of the drilling rig includes a variable head body, a movable head, a nut, a variable head rotating part, drill pipe connecting part, sealing ring and sealing structure, the left and right sides of the variable head main body are respectively connected with the nut and the variable head rotating part, the movable head is arranged on one side of the variable head rotating part, the The swivel head can rotate under the action of an external rotational force, the drill pipe connection part is arranged on one side of the nut, and the drill pipe connection part is provided with threads, and the sealing ring is arranged at the connection between the nut and the drill pipe connection part. , the sealing structure is set as a double-channel sealing structure, and the double-channel sealing structure is outside the connecting part of the drill pipe.

Preferably, the inner diameter of the sealing ring is larger than the inner diameter of the water variable head body.

Preferably, the double-channel sealing structure includes a front step joint, a back step joint and an outer casing nut, the front step joint and the back step joint are respectively arranged at both ends of the drill pipe connection part, and the front step joint and the back step joint They are connected by outer casing nuts, the size of the front step joint and the back step joint match, and a square groove is arranged at the connection between the front step joint and the back step joint.

Preferably, a metal butterfly ring is arranged in the square groove.

Preferably, a rubber O-ring is provided on the upper side of the joint between the front stepped joint and the rear stepped joint.

The beneficial effects of adopting the above technical scheme are: the structure of the utility model provides a pressurized anti-leakage device for the variable head of the drilling rig. The rubber O-ring is used as an auxiliary seal to perform secondary sealing for possible water leakage, thereby improving the reliability of the overall seal. After the installation of the pressurized anti-leakage device at the tail of the drilling rig, the connection gap can be greatly reduced The amount of water leakage can increase, thereby increasing the water pressure in the borehole, providing guarantee for the quality of drilling construction and the effect of gas drainage, and has a broad market prospect.

Description of drawings

Fig. 1 is a structural schematic diagram of a water variable head pressurized anti-leakage device of the utility model.

Fig. 2 is a structural schematic diagram of a double-channel sealing structure.

Among them, 1-variable head main body, 2-live head, 3-nut, 4-variable head rotating part, 5-drill pipe connection part, 6-sealing ring, 7-double sealing structure, 8-thread, 9-front Step connector, 10-rear step connector, 11-outer nut, 12-square groove, 13-metal butterfly ring, 14-rubber O-ring.

Detailed ways

Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows the specific embodiment of the present utility model: a kind of pressurization and anti-leakage device of water variable head of drilling rig, said device of pressurization and anti-leakage of water variable head of drilling rig comprises variable head main body 1, movable head 2, nut 3, variable head Head rotating part 4, drill pipe connecting part 5, sealing ring 6 and sealing structure, the left and right sides of the variable head main body 1 are respectively connected with the nut 3 and the variable head rotating part 4, and the movable head 2 is arranged on the variable head rotating part. One side of part 4, the swivel head 2 can rotate under the action of an external rotational force, the drill pipe connection part 5 is arranged on one side of the nut 3, and the drill pipe connection part 5 is provided with a screw thread 8, so The sealing ring 6 is arranged at the joint between the nut 3 and the drill pipe connecting portion 5 , and the sealing structure is provided as a double-channel sealing structure 7 , and the double-channel sealing structure 7 is outside the drill pipe connecting portion 5 .

In addition, as shown in Figure 2, the inner diameter of the sealing ring 6 is larger than the inner diameter of the water variable head body, and the double-channel sealing structure 7 includes a front stepped joint 9, a rear stepped joint 10 and an outer casing nut 11, and the front stepped joint 9 and Rear step joints 10 are respectively arranged at both ends of the drill pipe connecting portion 5, the front step joint 9 and the rear step joint 10 are connected by an outer sleeve nut 11, and the dimensions of the front step joint 9 and the rear step joint 10 match , the connection between the front step joint 9 and the back step joint 10 is provided with a square groove 12, and a metal butterfly ring 13 is arranged in the square groove 12, and the connection between the front step joint 9 and the back step joint 10 A rubber O-ring 14 is provided on the upper side.

Based on the above, the utility model provides a pressurized anti-leakage device for the water variable head of the drilling rig. The double-channel sealing structure uses a metal dish ring as the main seal, which has the characteristics of small fastening load and extremely low seal leakage rate. The rubber O-ring is used as an auxiliary seal to perform secondary sealing for possible water leakage, thereby improving the overall sealing reliability. After the installation of the pressurized anti-leakage device at the tail of the drilling rig, the amount of water leakage at the connection gap can be greatly reduced, thereby improving The water pressure in the borehole guarantees the quality of borehole construction and the effect of gas drainage, and has broad market prospects.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model..

Claims (5)

1. a kind of drilling machine water becomes head pressurization leakage-proof liquid device, which is characterized in that the drilling machine water becomes head pressurization leakage-proof liquid device packet It includes and becomes head main body, head living, nut, becomes head rotating part, drilling rod connecting portion, sealing ring and sealing structure, the left side for becoming head main body Right both sides are connect respectively with nut and change head rotating part, and the work head is arranged on the side for becoming head rotating part, and the work head is outside Adding can rotate under the action of rotatory force, and the drilling rod connecting portion is arranged on the side of nut, is set on the drilling rod connecting portion There is screw thread, the sealing ring is arranged on the junction of nut and drilling rod connecting portion, and the sealing structure is set as double sealing knot Structure, the double-channel sealing structure is in the outside of drilling rod connecting portion.

2. a kind of drilling machine water according to claim 1 becomes head pressurization leakage-proof liquid device, which is characterized in that in the sealing ring Diameter is more than water and becomes head ontology internal diameter.

3. a kind of drilling machine water according to claim 1 becomes head pressurization leakage-proof liquid device, which is characterized in that the double sealing Structure includes front step connector, backward step connector and cap nut, and the front step connector and backward step connector are separately positioned on The both ends of drilling rod connecting portion are connected between the front step connector and backward step connector by cap nut, and the front step connects The size of head and backward step connector matches, and the junction of the front step connector and backward step connector is provided with square groove.

4. a kind of drilling machine water according to claim 3 becomes head pressurization leakage-proof liquid device, which is characterized in that in the square groove It is provided with metal butterfly ring.

5. a kind of drilling machine water according to claim 3 becomes head pressurization leakage-proof liquid device, which is characterized in that the front step connects Rubber o-ring is provided on the upside of junction between head and backward step connector.