CN212642604U - Flexible reaming device - Google Patents

Abstract

The utility model belongs to the technical field of colliery drilling, specifically, relate to a flexible reaming device, including drilling rod, reaming seat and drill bit, the both ends of reaming seat are connected with drill bit and drilling rod respectively, the one end that the reaming seat was kept away from to the drilling rod is connected with the gear motor transmission, be equipped with flexible reaming chain or cable on the reaming seat, flexible reaming chain or cable all adopt the high-strength wear-resisting metal material, and all wear to be equipped with high-pressure hose in flexible reaming chain or the cable, be equipped with the high pressure water channel that is linked together in drilling rod and the reaming seat, high pressure hose is linked together with high pressure water channel, the uncovered or closed setting of one end that the reaming seat was kept away from to high pressure hose utilizes this flexible reaming device to carry out the reaming to the ordinary drilling in colliery, can improve reaming device's reliability, reduces the reaming cost, guarantees the reaming.

Description

Flexible reaming device

Technical Field

The utility model belongs to the technical field of colliery drilling, specifically, relate to a flexible reaming device.

Background

Before coal mine collection, a hole needs to be drilled for gas extraction, a hole needs to be drilled from a rock layer to a coal seam during drilling, and in order to save drilling cost and increase gas extraction efficiency, the hole needs to be reamed under the condition that the hole diameter of a rock layer drilling section is not changed, so that the surface area of an inner hole of the coal seam is enlarged, and the gas overflow efficiency is improved.

Chinese patent document CN201810392039.0 discloses a soil layer variable diameter mechanical reaming bit and a drilling method using the same, wherein torque is transmitted through the bit and a transmission rod, and a reaming telescopic arm is folded when the bit is not stressed, so that small diameter drilling can be conveniently performed; when the reamer enters the bottom of the hole, pressure is applied through the transmission rod, the reaming telescopic arm is outwards opened, and the second connecting rod inlaid with the alloy particles 5 is used as the reaming arm to cut the wall of the hole after rotating along with the transmission rod to form reaming. The diameter of the reaming hole can be adjusted by controlling the telescopic length of the reducing control rod. After the reaming section is constructed, the whole body retreats backwards, the two opened connecting rods automatically fold and straighten under the friction action of the hole wall, and the whole diameter is reduced, so that the hole can be smoothly retreated out of the hole from the non-reaming section. There is also the reaming bit that drives the reaming arm through hydraulic support and stretch out and draw back in the market, but among the prior art, the reaming effect of setting up of reaming arm is not ideal, and the stress that the connecting portion of reaming arm and drilling rod received at the reaming in-process is great, easy fatigue damage, and when reaming arm shrink easily and between the drilling rod centre gripping bold coal grain, lead to the shrink not in place, the influence moves back to bore, increases the reaming cost, and can't guarantee the reaming efficiency of construction of drilling.

Therefore, a new flexible reaming device is needed to improve the reliability of the reaming device, reduce the reaming cost and ensure the reaming efficiency of coal mine drilling.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a flexible reaming device, including drilling rod, reaming seat and drill bit, the both ends of reaming seat are connected with drill bit and drilling rod respectively, the one end that the reaming seat was kept away from to the drilling rod is connected with the gear motor transmission, be equipped with flexible reaming chain or cable on the reaming seat, flexible reaming chain or cable all adopt high-strength wear-resisting metal material, high-strength wear-resisting metal material can choose for use 27SiMn material, and intensity is high, and the wearability is good. And high-pressure hoses penetrate through the flexible reaming chains or the cables, the cables are made of a plurality of strands of steel wires made of wear-resistant alloy steel materials and stranded outside the high-pressure hoses, high-pressure water channels communicated with each other are arranged in the drill rods and the reaming seats, the high-pressure hoses are communicated with the high-pressure water channels, and one ends, far away from the reaming seats, of the high-pressure hoses are opened or closed.

Preferably, the flexible reaming chain adopts a mining high-strength round-link chain, the freedom degree of each chain link of the mining high-strength round-link chain is high, the problem of coal accumulation between the mining high-strength round-link chain and the reaming base can be avoided, and a high-pressure hose is conveniently penetrated.

Preferably, the high-pressure hose is an armored metal hose, so that the service life of the high-pressure hose is guaranteed.

Preferably, the outer surfaces of the reaming base and the drill rod are provided with spiral guide chutes, so that broken coal particles can be conveniently and timely conveyed out of drilled holes during reaming, and the reaming efficiency is ensured.

Preferably, the drilling rod is in threaded connection with the reaming base, the connecting end of the reaming base and the drill bit is correspondingly provided with matched concave-convex connecting parts, and the reaming base is fixedly connected with the concave-convex connecting parts of the drill bit through bolts, so that the reliability of connection of the drill bit is guaranteed.

Preferably, still be equipped with the diamond compact piece on flexible reaming chain or the cable, be favorable to prolonging the life of flexible reaming chain or cable to improve reaming efficiency. Set up the one end that flexible reaming chain or cable kept away from the reaming seat with the diamond compact piece, be favorable to reducing device manufacturing cost to guarantee reaming efficiency.

Preferably, flexible reaming chain or cable is provided with three circles along reaming seat axial interval, and every circle is equipped with two flexible reaming chains or cables, is favorable to guaranteeing reaming efficiency to increase the stability and the reliability of device.

Preferably, the reaming radii of the three turns of flexible reaming chain or cable are 100mm, 200mm and 250mm respectively, the smaller the reaming radius the closer the flexible reaming chain or cable is to the drill bit. The purpose of drilling forward and gradually expanding the drilled hole can be achieved, and the reaming efficiency is improved.

The utility model discloses still including enabling this flexible reaming device normal use other subassemblies, be the conventional technical means in this field. In addition, the device or the component which is not limited in the utility model adopts the conventional technical means in the field.

In the utility model, the flexible reaming device drives the drill rod to rotate through the speed reducing motor, then drives the reaming base and the drill bit to rotate, the drill bit plays the purpose of deepening the drilling, the flexible reaming chain or the cable connected on the periphery of the reaming base is thrown when the reaming base rotates, flexible beating is realized to the coal bed in the drill hole, thereby achieving the purpose of flexible reaming and ensuring the rigidity of a flexible reaming chain or a cable, high-pressure hoses penetrate through the flexible reaming chains or the cables, high-pressure water is introduced into the high-pressure hoses through high-pressure water channels in the drill rods and the reaming seats, the high-pressure hoses are expanded and hardened, and the flexible reaming chains or the cables are rapidly stretched and the rigidity is enhanced, thereby improve reaming efficiency, when the one end that the reaming seat was kept away from to the high pressure hose was uncovered, the open end blowout of high pressure water from the high pressure hose played the effect of water conservancy cutting to the coal seam to further improvement reaming efficiency. In order to further ensure the hydraulic cutting effect, the open end of the high-pressure hose can be connected with a high-pressure spray head.

The beneficial effects of the utility model are that, this device realizes flexible reaming to coal seam drilling through setting up flexible reaming chain or cable, and the device easily damages when having solved among the prior art through reaming arm reaming, and is difficult for moving back the technical problem of boring to the reliability of device has been guaranteed, and improves the rigidity of flexible reaming chain or cable through setting up high-pressure hose, supplementary water conservancy cutting simultaneously, can improve the reaming efficiency of colliery drilling by a wide margin, reduces the reaming cost.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a terminal three-dimensional structure of the flexible reaming chain of the present invention.

Detailed Description

The present invention will be described more clearly with reference to the accompanying drawings and specific embodiments in the embodiments of the present invention, and the description herein is only for explaining the present invention, but not for limiting the present invention. Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by those skilled in the art without creative efforts should be included in the protection scope of the present invention.

Example 1

As shown in fig. 1-2, the utility model provides a flexible reaming device, including drilling rod 1, reaming seat 2 and drill bit 3, the both ends of reaming seat 2 are connected with drill bit 3 and drilling rod 1 respectively, drilling rod 1 keeps away from the one end and the gear motor (not shown in the figure) transmission of reaming seat 2 and is connected, be equipped with flexible reaming chain 4 on reaming seat 2, flexible reaming chain 4 adopts high-strength wear-resisting metal material, high-strength wear-resisting metal material chooses for use 27SiMn material. And a high-pressure hose 5 penetrates through the flexible reaming chain 4, a high-pressure water channel 6 communicated with each other is arranged in the drill rod 1 and the reaming base 2, the high-pressure hose 5 is communicated with the high-pressure water channel 6, and one end, far away from the reaming base 2, of the high-pressure hose 5 is opened or closed. Flexible reaming chain 4 adopts mining high strength round-link chain, and each chain link degree of freedom of mining high strength round-link chain is high, can avoid appearing long-pending coal problem between mining high strength round-link chain and reaming seat 2, and conveniently wears to establish high-pressure hose 5. The high-pressure hose 5 is made of an armored metal hose, so that the service life of the high-pressure hose 5 is guaranteed. The outer surfaces of the reaming base 2 and the drill rod 1 are provided with spiral guide chutes 7, so that broken coal particles can be conveniently and timely conveyed out of drilled holes during reaming, and the reaming efficiency is ensured. Drilling rod 1 and 2 threaded connection of reaming seat, reaming seat 2 corresponds with the link of drill bit 3 and is provided with assorted unsmooth connecting portion, and reaming seat 2 passes through bolt fixed connection with the unsmooth connecting portion of drill bit 3, guarantees the reliability that drill bit 3 connects. One end of the flexible reaming chain 4 far away from the reaming base 2 is provided with a diamond composite sheet 8, so that the service life of the flexible reaming chain 4 is prolonged, the manufacturing cost of the device is reduced, and the reaming efficiency is improved. Flexible reaming chain 4 is provided with three circles along the axial interval of reaming seat 2, and every circle is equipped with two flexible reaming chains 4, is favorable to guaranteeing reaming efficiency to increase the stability and the reliability of device. The reaming radii of the three rings of flexible reaming chains 4 are respectively 100mm, 200mm and 250mm, and the closer the flexible reaming chains 4 are to the drill bit, the smaller the reaming radii are. The purpose of drilling forward and gradually expanding the drilled hole can be achieved, and the reaming efficiency is improved.

In the utility model, the flexible reaming device drives the drill rod 1 to rotate through the speed reducing motor, then drives the reaming base 2 and the drill bit 3 to rotate, the drill bit 3 plays the purpose of deepening the drilling, the flexible reaming chain 4 connected on the periphery of the reaming base 2 is thrown when the reaming base rotates, flexible beating is realized to the coal bed in the drill hole, thereby achieving the purpose of flexible reaming and ensuring the rigidity of the flexible reaming chain 4, a high-pressure hose 5 is arranged in the flexible reaming chain 4 in a penetrating way, and high-pressure water is introduced into the high-pressure hose 5 through a high-pressure water channel 6 in the drill rod 1 and the reaming base 2, so that the high-pressure hose 5 is expanded and hardened, the flexible reaming chain 4 is rapidly stretched and the rigidity is enhanced, therefore, the reaming efficiency is improved, when one end of the high-pressure hose 5, which is far away from the reaming base 2, is open, high-pressure water is sprayed out from the open end of the high-pressure hose 5, the hydraulic cutting effect is achieved on the coal seam, and the reaming efficiency is further improved.

Claims (9)

1. A flexible reaming device, includes the drilling rod, its characterized in that: still include reaming seat and drill bit, the both ends of reaming seat are connected with drill bit and drilling rod respectively, the drilling rod is kept away from the one end of reaming seat and is connected with the gear motor transmission, be equipped with flexible reaming chain or cable on the reaming seat, flexible reaming chain or cable all adopt high-strength wear-resisting metal material, and all wear to be equipped with high-pressure hose in flexible reaming chain or the cable, be equipped with the high pressure water channel that is linked together in drilling rod and the reaming seat, high pressure hose is linked together with high pressure water channel, the one end that the reaming seat was kept away from to high pressure hose is uncovered or seals the setting.

2. The flexible reaming device of claim 1, wherein: the flexible reaming chain is a mining high-strength round-link chain.

3. The flexible reaming device of claim 1, wherein: the high-pressure hose is an armored metal hose.

4. The flexible reaming device of claim 1, wherein: the high-strength wear-resistant metal material is a 27SiMn material.

5. The flexible reaming device of claim 1, wherein: and spiral guide chutes are arranged on the outer surfaces of the reaming seat and the drill rod.

6. The flexible reaming device of claim 1, wherein: the drill rod is in threaded connection with the reaming base, the connecting end of the reaming base and the drill bit is correspondingly provided with matched concave-convex connecting parts, and the reaming base is fixedly connected with the concave-convex connecting parts of the drill bit through bolts.

7. The flexible reaming device of claim 1, wherein: and a diamond compact is also arranged on the flexible reaming chain or the cable.

8. The flexible reaming device of claim 1, wherein: the flexible reaming chains or cables are axially arranged in three circles at intervals along the reaming base, and each circle is provided with two flexible reaming chains or cables.

9. The flexible reaming device of claim 8, wherein: the reaming radii of the three turns of flexible reaming chains or cables are 100mm, 200mm and 250mm, respectively, the closer the flexible reaming chains or cables are to the drill bit, the smaller the reaming radii are.

Images