CN204754898U - Rotation type water conservancy slot nozzle - Google Patents

Abstract

The utility model relates to a rotary hydraulic slit nozzle for coal seam gas pumping, comprising a water inlet rod, the bottom end of the water inlet rod is blocked, and a water outlet is arranged on the rod wall; the external rotatable connection of the water inlet rod has a rotating The nozzle, the inner part of the rotating nozzle is provided with an annular water cavity corresponding to the water outlet, and the circumference of the water cavity is provided with a plurality of nozzles; the nozzle is equipped with a deflector that can transfer the water jet ejected from the nozzle to the rotating nozzle and push the rotating nozzle to rotate at a constant speed , the nozzle has changed the traditional operation mode of coal seam hydraulic cutting by rotating the water inlet rod, and uses the counter force of the water jet to drive the rotating nozzle to rotate at a constant speed, which avoids the direct friction between the water inlet rod and the coal seam and consumes a lot of energy, and improves the efficiency. , Reduced labor intensity.

Description

A Rotary Hydraulic Slit Nozzle

technical field

The utility model relates to a hydraulic slotting nozzle, in particular to a rotary hydraulic slotting nozzle for coal seam gas pumping.

Background technique

Coal seam gas drainage is the fundamental prevention and control measure to avoid coal mine gas disasters. The hydraulic slotting technology is to form a flat slot in a certain space inside the coal seam through water jets, so that the stress of the coal body can be relaxed, relieved, destroyed, and broken after the slotting. Connecting cracks are formed near the slots to increase the permeability of the coal seam by double or ten times, thereby effectively increasing the gas migration rate, and then extracting the coal seam gas, so that the gas coal seam becomes a low gas or no gas coal seam , Fundamentally avoid the occurrence of gas disasters.

To cut a slit inside the coal body, the nozzle of the hydraulic slit must be rotated. At present, the commonly used method is to rotate the water inlet rod to realize the rotation of the nozzle when performing hydraulic cutting in the drill hole. This method causes direct friction between the water inlet rod and the coal body during rotation, and its speed is not easy to control, and the operation is cumbersome and Time-consuming.

Utility model content

Aiming at the problems existing in the above-mentioned prior art, the utility model proposes a rotary hydraulic slit nozzle, which adopts the principle of water jet reaction and improves the rotation mode of the water rod to the rotary nozzle mode. easy.

In order to achieve the above object, the technical solution adopted by the utility model is: a rotary hydraulic slit nozzle, including a water inlet rod, the bottom end of the water inlet rod is blocked, and a water outlet is arranged on the rod wall; the outside of the water inlet rod The rotating nozzle is rotatably connected, and the interior of the rotating nozzle is provided with an annular water chamber corresponding to the water outlet, and a plurality of nozzles are arranged around the water chamber; A deflector that rotates at a constant speed.

The deflector is an arc-shaped structure, one end of which is fixedly connected to one side of the spout, and the other end is a free end, which extends obliquely to the other side of the spout, and the direction of flow of each deflector is consistent with the direction of rotation of the rotating nozzle. on the contrary.

The width of the deflector is not smaller than the diameter of the nozzle.

There are at least two water outlets, which are evenly distributed on the wall of the water inlet rod in the circumferential direction.

There are at least two nozzles.

The diameter of the spout is smaller than that of the water outlet.

The end of the water inlet rod is blocked by a nut, which is threadedly connected with the water inlet rod, and the diameter of the nut is larger than that of the rotating nozzle.

A positioning pin is arranged on the water inlet rod, and the rotating nozzle is limited between the positioning pin and the nut.

Beneficial effects of the utility model: the nozzle changes the traditional operation mode of coal seam hydraulic cutting by rotating the water inlet rod, and uses the counter force of the water jet to push the rotating nozzle to rotate at a uniform speed, which avoids direct friction between the water inlet rod and the coal seam and consumes a lot energy, which improves efficiency and reduces labor intensity.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the sectional view of annular water cavity and deflector.

In the figure, 1. water inlet rod, 2. positioning pin, 3. annular water cavity, 4. deflector, 5. rotating nozzle, 6. nut, 7. spout, 8. water outlet.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing.

As shown in the figure, a rotary hydraulic slotting nozzle includes a water inlet rod 1, the bottom end of the water inlet rod 1 is blocked, and a water outlet 8 is arranged on the rod wall; the external rotatable connection of the water inlet rod 1 has The rotary nozzle 5 is provided with an annular water chamber 3 corresponding to the water outlet 8 inside the rotary nozzle 5, and a plurality of spouts 7 are arranged on the circumference of the water chamber; The deflector 4 that pushes the rotating nozzle 5 to rotate at a constant speed.

The deflector 4 is an arc-shaped structure, one end of which is fixedly connected to one side of the spout 7, and the other end is a free end, which extends obliquely to the other side of the spout 7, and the direction of flow of each deflector 4 is consistent with the rotation direction of the spout 7. The direction of rotation of the nozzle 5 is reversed.

The width of the deflector 4 is not smaller than the diameter of the nozzle 7 .

There are at least two water outlets 8, which are evenly distributed on the wall of the water inlet rod 1 in the circumferential direction.

There are at least two nozzles 7 .

The diameter of the spout 7 is smaller than that of the water outlet 8 .

The end of the water inlet rod 1 is blocked by a nut 6 , which is threadedly connected with the water inlet rod 1 , and the diameter of the nut 6 is larger than that of the rotary nozzle 5 .

The water inlet rod 1 is provided with a positioning pin 2 , and the rotating nozzle 5 is limited between the positioning pin 2 and the nut 6 .

When in use, the water flow enters the annular water cavity 3 from the water inlet rod 1 through the water outlet 8, and then sprays from the nozzle 7. The water flows through the deflector 4 and is sprayed along the tangential direction of the rotating nozzle 5, and generates a reaction force to promote the rotation. The nozzle 5 rotates at a constant speed, and the setting of the nut 6 can prevent the rotating nozzle 5 from touching the wall of the borehole, so as to ensure its normal operation. It can be used only by replacing the nozzle with the traditional structure, which is convenient to operate and saves time and effort.

Claims (8)

1. a rotary hydraulic slotted liner technique nozzle, comprises into water bar, and the bottom shutoff of water inlet bar, bar wall sets out the mouth of a river; It is characterized in that, described water inlet bar outer rotatable be connected with swivel nozzle, the inner corresponding delivery port of swivel nozzle is provided with annular water chamber, and water cavity is circumferentially with multiple spout; Described spout is equipped and the water jet that spout sprays can be passed to swivel nozzle and promote the deflector that swivel nozzle at the uniform velocity rotates.

2. the rotary hydraulic slotted liner technique nozzle of one according to claim 1, it is characterized in that, described deflector is arcuate structure, its one end is fixed on the side of spout, the other end is free end, tilt to extend to the opposite side of spout, and the water conservancy diversion direction of each deflector is contrary with the rotation direction of swivel nozzle.

3. the rotary hydraulic slotted liner technique nozzle of one according to claim 2, is characterized in that, the width of described deflector is not less than the diameter of spout.

4. the rotary hydraulic slotted liner technique nozzle of one according to claim 1, it is characterized in that, described delivery port at least arranges two, and circumference is distributed on on water bar bar wall.

5. the rotary hydraulic slotted liner technique nozzle of one according to claim 1, it is characterized in that, described spout at least arranges two.

6. the rotary hydraulic slotted liner technique nozzle of one according to claim 1, is characterized in that, the bore of described spout is less than the bore of delivery port.

7. the rotary hydraulic slotted liner technique nozzle of one according to claim 1, is characterized in that, the end of described water inlet bar is by nut shutoff, and nut is threaded with water inlet bar, and the diameter of nut is greater than the diameter of swivel nozzle.

8. the rotary hydraulic slotted liner technique nozzle of one according to claim 7, is characterized in that, described water inlet bar is provided with alignment pin, and swivel nozzle is limited between alignment pin and nut.