CN107859496B - Ice core drilling opening protection device - Google Patents

Abstract

The invention relates to an ice core drilling opening protection device which is structurally characterized in that a groove plate is bent downwards along the periphery and is in a rectangular box-shaped structure, the groove plate is buckled above an ice core drilling hole, four corners of the groove plate are provided with holes, and steel bars fix the groove plate on the surface of glaciers through the holes; the steel ring is fixedly connected to the center of the groove plate and opposite to the center of the drilling hole; the steel ring is covered with a cover cap, the cover cap is provided with a hole and a notch, and when the ice core is drilled, a cable connected with the drill bit is arranged in the hole through the notch. The invention has simple structure and reasonable design, can effectively avoid blockage of the ice core drilling hole, damage and blocking of the ice core drilling machine caused by falling of the device into the ice core drilling hole in the ice core drilling process, ensures smooth operation of the ice core drilling work, and reduces waste of manpower and material resources.

Description

Ice core drilling opening protection device

Technical Field

The invention relates to an ice core drilling opening protection device, which can prevent objects from falling into the ice core drilling hole to block the ice core drilling hole, damage or even jam the ice core drilling machine during the operation of the drilling machine, thereby ensuring the smooth progress of ice core drilling work.

Background technique

Ice core drilling is a hole formed by continuously drilling multiple ice cores vertically downward from the surface of the glacier using an ice core drill and lifting the ice cores to the ground. The ice core drill extends from the ice core drill opening on the surface of the glacier to the bedrock at the bottom of the glacier. When drilling ice cores, the ice core drill uses the ice core drill support and cable located at the top of the ice core drill hole to descend and lift through the ice core drill hole opening multiple times to drill and extract the ice core. Since the exposed ice core drill hole opening is parallel to the ground, the tools, utensils and other items carried by the workers, such as screwdrivers, gloves, markers, etc., accidentally fall and slide from the ground into the ice core drill hole. Since the diameter of the ice core drilling hole is very small and the depth is very deep, it is difficult to remove objects from the hole, causing blockage of the ice core drilling hole. Hard objects may damage the cutter head of the ice core drill, making it impossible for the ice core drill to drill downward. On the other hand, the ice core drill may also be stuck by objects, causing the ice core drill to be stuck in the drill hole and unable to be pulled out. Ultimately, the ice core drill has to be abandoned, resulting in the failure of the ice core drilling work. It is necessary to choose a suitable ice core drilling point to re-drill the ice core, resulting in a huge waste of manpower and material resources.

Summary of the invention

In view of the above, an object of the present invention is to provide an ice core drilling opening protection device for preventing objects from falling into the ice core drilling hole.

The object of the present invention is achieved in that:

An ice core drilling opening protection device is composed of a slot plate, a steel ring, a cap and a steel chisel. The slot plate is a rectangular box-shaped structure with four edges bent downward, and is buckled above the ice core drilling hole. There are holes at the four corners of the slot plate, and the steel chisel fixes the slot plate to the ground through the holes; the steel ring is fixed to the center of the slot plate and is opposite to the center of the drill hole. The steel ring is covered with a cap, and the center of the cap has a hole and a cut. When drilling the ice core, the cable connected to the drill bit is placed in the hole through the cut.

The advantages and beneficial effects of the present invention are:

1. The slot plate of the present invention is a rectangular box-shaped structure, the box mouth can be buckled on the ice core drilling hole, the slot edge of the slot plate can cut into the surface of the glacier, and four fixed steel chisels fix the slot plate from the four corners, which can effectively prevent the slot plate from rotating, sliding in the horizontal direction and moving in the vertical direction, so that the relative position of the present invention and the opening of the ice core drilling hole remains fixed. The steel ring is located at the center of the slot plate and is fixed to the slot plate. The center of the steel ring is opposite to the center of the drilling hole, which is convenient for the ice core drill to enter and exit the ice core drilling hole, thereby improving the efficiency of ice core drilling work.

2. The caliber of the steel ring on the groove plate of the present invention is 150 mm, which is larger than the diameter of the ice core drilling hole of 95 mm; the caliber of the cap is 170 mm, which is larger than the caliber of the steel ring, and is covered on the steel ring to prevent the cap and the steel ring from freezing, and facilitate the rapid covering and removal of the cap, thereby avoiding the collision between the ice core drilling rig and the steel ring when frequently entering and exiting the ice core drilling hole; the diameter of the cable through hole of the cap is larger than the diameter of the cable, which facilitates the passage of the cable in the cap hole and reduces the friction between the cable and the wall of the cap hole; the steel ring is upright to prevent objects dropped on the ground from sliding into the ice core drilling hole; the cable connected to the drill bit is placed in the cable through hole through the incision of the cap to perform ice core drilling and extraction.

3. The present invention has a simple structure and reasonable design, which can effectively prevent objects from falling into the ice core drilling hole during the ice core drilling process, causing blockage of the ice core drilling hole, damage to the ice core drilling machine and jamming, thereby ensuring the smooth progress of the ice core drilling work and reducing the waste of manpower and material resources.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the present invention.

Detailed ways

The ice core drilling rig used in the present invention is a light drilling rig (model: BZXJ-ⅡD) specially designed for extreme conditions in high mountains. The light drilling rig has a drilling frame height of ~3 m, a drill bit weight of 21 kg, a drill barrel length of 1.75 m, a drilled ice core diameter of 94-95 mm, a single drilled ice core length of 0.7-0.8 m, a motor power of 0.3 kW, a power source of 220 V, a 2 kW AC gasoline generator, a cable (model: 4H-181A) length of 300 m, a cable diameter of 4.72 mm, and a drilling depth of 200-250 m. The connection method of the drilling rig is as follows: after the cable is led out from the winch, it is connected to the drill bit through the pulley on the drilling frame, the ice core drilling barrel is clamped at the front end of the drill bit, and the cutter head is installed at the front end of the drill barrel, so that the entire ice core drilling rig is vertically hoisted under the drilling frame through the cable.

The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

As shown in FIG1 , an ice core drilling opening protection device is composed of a slot plate 1, a steel ring 2, a cap 3 and a steel drill 4. The diameter of the steel ring 2 is 150 mm, which is larger than the diameter of the ice core drilling hole 95 mm; the diameter of the cap 3 is 170 mm; the slot plate 1 is a rectangular box-shaped structure with four edges rolled down, buckled above the ice core drilling hole. There are holes at the four corners of the slot plate 1, and the steel drill 4 with a length of 300 mm passes through the holes at the four corners of the slot plate 1 to fix the slot plate 1 to the snow (ice) layer on the surface of the glacier; the steel ring wall is 35 mm high, fixed to the center of the slot plate 1, and opposite to the center of the drilling hole 5, and the cap 3 is covered on the steel ring 2, and the cap 3 has a hole 8 and a cutout 7 in the center, and the cutout is 5.5 mm wide; the diameter of the hole 8 is 7.5 mm; in the drilling hole 5, the cable 6 connected to the drill bit is placed in the hole 8 through the cutout 7.

During operation, after the first ice core is drilled, the opening of the 95 mm ice core borehole 5 is formed, and the ice core drill is lifted to the glacier surface and removed from the opening of the ice core borehole 5. First, buckle the slot plate 1 with the box opening facing down on the glacier surface at the opening of the ice core borehole 5, and align the center of the ice core borehole 5 with the center of the steel ring 2, then press the slot plate 1 downward by hand so that the slot edges around the slot plate 1 cut into the glacier surface until the bottom of the slot plate 1 contacts the glacier surface; fix the slot plate 1 to the glacier surface by passing four steel chisels 4 through the holes at the four corners of the slot plate 1, and use a hammer to knock down and fix the steel chisels 4 until the steel chisels 4 are completely inserted into the glacier. After the slot plate 1 is fixed, buckle the cap 3 on the steel ring 2 to complete the protection of the opening of the ice core borehole. When the ice core is drilled, the cap 3 is removed to expose the ice core drilling hole 5. The ice core drilling machine is vertically lowered under the action of the cable and enters the ice core drilling hole 5 through the steel ring 2. Then the cable 6 is moved to the hole 8 of the cap 3 through the cutout 7 on the cap 3. The cap 3 covers the steel ring 2 and the ice core drilling machine is lowered to the bottom of the ice core drilling hole 5 to drill and extract the ice core. When a section of ice core is drilled and lifted to the opening of the ice core drilling hole 5, the cap 3 is removed from the steel ring 2, and the cable 6 is removed from the hole 8 and the cutout 7. The ice core drilling machine is further lifted to the top of the ice core drilling hole 5, and the steel ring 2 is immediately covered with the cap 3 to protect the opening of the ice core drilling hole 5 and prevent objects from falling to the ground and sliding into the ice core drilling hole.

Claims (1)

1. The method for protecting the drill hole opening of the ice core is characterized by comprising the following steps of: the method uses an ice core drilling opening protection device, which consists of a groove plate (1), a steel ring (2), a cap (3) and a steel rod (4), wherein the groove plate (1) is of a rectangular box-shaped structure with the periphery bent downwards and is buckled above an ice core drilling hole (5), four corners of the groove plate (1) are provided with holes, and the steel rod (4) is used for fixing the groove plate (1) on the ground through the holes; the steel ring (2) is fixedly connected to the center of the groove plate (1) and is opposite to the center of the ice core drilling hole (5), a cover cap (3) is covered on the steel ring (2), a hole (8) and a notch (7) are formed in the cover cap (3), and a cable (6) connected with a drill bit is arranged in the hole (8) through the notch (7) in the ice core drilling hole (5); the caliber of the steel ring (2) is 120-150 mm, and the wall height of the steel ring is 30-45 mm; the caliber of the cap (3) is 140-170 mm; the incision width is 5.5 mm, and the diameter of the hole (8) is 8.0 mm;

When the ice core drilling device is used, firstly, the box opening of the groove plate (1) is buckled downwards on the glacier surface at the opening of the ice core drilling hole (5), the center of the ice core drilling hole (5) is aligned with the center of the steel ring (2), then the groove plate (1) is pressed downwards by hands, so that the groove edges around the groove plate (1) are cut in from the glacier surface until the bottom of the groove plate (1) is contacted with the glacier surface; the groove plates (1) are fixed on the surface of the glacier through holes in four corners of the groove plates (1) respectively penetrated by 4 steel bars (4), and the steel bars (4) are fixed by downward knocking of an iron hammer until the steel bars (4) completely penetrate into the glacier; after the groove plate (1) is fixed, the cap (3) is buckled on the steel ring (2), and the protection of the drilling opening of the ice core is completed.