KR20240011960A - Mixed fluid separation system for DTH hammer - Google Patents

Abstract

The present invention relates to DTH Hammer's mixed fluid separation system, which separates the compressed air, water, and lubricant mixed fluid supplied to the upper part of the rod connector part into three modules, 1, 2, and 3, and supplies them sequentially. The compressed air and lubricating oil are supplied to the inside of the DTH Hammer and used as the working fluid of the DTH Hammer, and the separated water is sprayed to the top of the DTH Hammer to prevent or reduce dust scattering.
In the present invention, an air supply module is assembled to a hammer, so that the water in the air fluid supplied from the upper fluid supply hole of the case is separated and discharged, the remaining lubricating oil and air operate the hammer at the bottom, and the separated water is discharged to prevent dust generation. It is used to suppress dust generation by being assembled on the top of a single hammer, and has the significant effect of increasing the life of the hammer by reducing the supply of water inside the hammer.

Description

Mixed fluid separation system for DTH hammer}

The present invention relates to a mixed fluid separation system of DTH Hammer. More specifically, the air supply module is assembled to the hammer, so that water in the air fluid supplied from the fluid supply hole at the top of the case is separated and discharged, and the remaining lubricant and air are discharged at the bottom. The hammer is operated, and the water discharged separately is used to suppress dust generation. It can be assembled on the top of a single hammer to suppress dust generation, and the lifespan of the hammer can be increased by reducing the supply of water inside the hammer. This is about DTH Hammer's mixed fluid separation system.

In general, drilling hammers are operated with large amounts of high-pressure compressed air, and a large amount of lubricating oil is supplied along with the compressed air for internal lubrication.

After operating the hammer, compressed air transports broken rock fragments from the underground drilling area to land. At this time, explosive emissions occur due to volume changes, which are the cause of dust and fine dust emissions at construction sites.

To suppress this, dust curtains and high-pressure sprayers are used, but social problems caused by dust generation at construction sites continue to increase.

With industrial development, the demand for drilling has steadily increased throughout the industry, including foundation construction for various buildings, groundwater, geothermal development, and mine mining, and the market size is also growing.

In particular, as urbanization is rapidly progressing around the world, essential infrastructure construction and urban improvement projects such as railways, roads, electricity, water and sewage systems are continuously underway or planned to expand urban infrastructure, and the scale of the construction continues to increase compared to the past. They are becoming larger and higher-rise.

As the construction scale becomes larger and higher-rise buildings increase, the allowable bearing capacity of foundation piles must be strengthened to safely support the superstructure, and for this purpose, the quantity and diameter of foundation piles must be increased.

For this purpose, basic civil engineering construction through large-diameter drilling is essential, so the demand for large-diameter drilling is increasing, and the market for drilling tools for large-diameter drilling is also expected to expand accordingly.

In general, a hammer that digs into the ground uses a fluid such as air or water to obtain digging force and also controls the movement of the hammer.

Regarding the typical hammer structure, Registered Utility Model Publication No. 20-0429346 states that when the compressed air received from the air compressor reaches the air hammer above through the rotary head and extension pipe, the piston inside the air hammer moves up and down. The bit is struck while repeating the action, and the bit breaks various types of ground to enable excavation.

The components of the air hammer used here can be roughly divided into chuck, shell, piston, compressed air distributor, and top serve. The role of each part is that the chuck is attached to the bottom of the shell and connects the air hammer and bit. The outer shell surrounds the outer circumference of the piston and makes the piston reciprocate naturally. The compressed air distributor distributes air so that the piston can reciprocate, and the top serve is coupled to the top of the outer shell and supplies compressed air to the air hammer. A technology that connects to an extension pipe to supply has been disclosed.

On the other hand, in a combination hammer in which two or more hammers are combined, the air or water fluid flows into the inflow passage and reciprocates the piston inside the hammer and is then discharged to the lower part of the hammer.

In the conventional combination hammer in which two or more hammers of this structure are combined, a large amount of air discharged from the bottom of the combination hammer case after operating each hammer is completely air lifted and a large amount of water, including sludge (crushed rock), is removed. is discharged to the ground.

As an example of the prior patent technology, Figure 1 is a diagram of the operation of a conventional combination hammer, Figure 2 is an external view of a conventional combination hammer, and Figure 3 is an exploded view of Figure 2. As shown in Patent No. 10-1337974, the compression supplied from an air compressor is shown. Air is distributed and supplied to a plurality of air hammers installed inside one combination hammer case (40) through an air distributor, and when the supplied air reaches each air hammer, the piston (9) inside the air hammer moves up and down. In a combination hammer in which excavation is performed by striking the lower bit while repeatedly acting and the bit breaks various ground, the exhaust air discharged by operating the piston 9 of each air hammer is not discharged to the lower part of the hammer. Rather, it is discharged into the combination hammer case 40 by being discharged through the discharge air hole 50 drilled in the air hammer wear sleeve 1, and some of the air discharged into the combination hammer case 40 is used in the drill. It is discharged into the atmosphere through the air discharge passage of the rod, or discharged to the ground through the sludge discharge passage 20, and a check valve assembly 30 is installed inside the case at the tip of the sludge discharge passage 20. A combination hammer capable of controlling the amount of discharged air has been disclosed, which prevents water from flowing back into the combination hammer case 40.

In addition, as shown in Figure 4 in an exploded view of another conventional combination hammer, registration number 10-1167854 relates to an air supply method for a cluster hammer combining two or more hammers 10, the combination hammer An air distribution block (1) with air distribution nozzles (3) is installed at the lower part of the air inlet cover (4) through which air enters, and hammers (10) are installed at the lower part of the air distribution block (1), respectively. The compressed air passing through the air distribution nozzle (3) is supplied to each hammer (10) and then operates the hammer (10), so that the hammer (10) mounted on the combination hammer is in the flushing position. A method of supplying air to a combination hammer equipped with a nozzle has been disclosed, which allows the combination hammer to operate smoothly without causing problems in the operation of other hammers.

However, the above conventional technologies had the disadvantage of not being able to separate and discharge the water in the air fluid that drives the hammer or use it for other purposes.

Therefore, the present invention was developed to solve the above problems. The air supply module is assembled to the hammer, so that the water in the air fluid supplied from the upper fluid supply hole of the case is separated and discharged, and the remaining lubricating oil and air are discharged through the hammer at the bottom. It operates, and the separately discharged water is used to suppress dust generation. It can be assembled on top of a single hammer to suppress dust generation, and it is a mixture of DTH hammers that can increase hammer life by reducing water supply inside the hammer. The goal is to provide a fluid separation system.

The present invention relates to DTH Hammer's mixed fluid separation system, which separates the compressed air, water, and lubricant mixed fluid supplied to the upper part of the rod connector part into three modules, 1, 2, and 3, and supplies them sequentially. The compressed air and lubricating oil are supplied to the inside of the DTH Hammer and used as the working fluid of the DTH Hammer, and the separated water is sprayed to the top of the DTH Hammer to prevent or reduce dust scattering.

Therefore, in the present invention, the air supply module is assembled to the hammer, and the water in the air fluid supplied from the upper fluid supply hole of the case is separated and discharged, the remaining lubricating oil and air operate the hammer at the bottom, and the separately discharged water generates dust. It is used to suppress dust generation by being assembled on the top of a single hammer, and has the significant effect of increasing the life of the hammer by reducing the supply of water inside the hammer.

Figure 1 is a diagram of a conventional hammer operation.
Figure 2 is an external view of a conventional hammer
Figure 3 is an exploded view of Figure 2
Figure 4 is an exploded view of another conventional hammer
Figure 5 is a cross-sectional view of the hammer of the present invention
Figure 6 is a configuration diagram of modules 1, 2, and 3 of the mixed fluid separation system of the DTH Hammer of the present invention.
7 is an external view of module 2 of the present invention.
Figure 8 is an internal cross-sectional view of module 2 of the present invention.
Figure 9 is a detailed internal cross-sectional view of module 2 of the present invention.
Figure 10 is a cross-sectional view of module 3 of the present invention
Figure 11 is a structural diagram of the DTH Hammer of the present invention

The present invention relates to DTH Hammer's mixed fluid separation system,

The compressed air, water, and lubricant mixed fluid supplied to the upper part of the rod connector part is separated into three modules, 1, 2, and 3, and supplied sequentially. The separated compressed air and lubricant are supplied to the inside of the DTH Hammer to form the DTH hammer. It is used as the working fluid of the hammer, and the separated water is sprayed to the top of the DTH Hammer to prevent or reduce dust scattering. The module 1 is centrifuged according to the density difference by a groove machined on the outside of the "Flow Rotation" part. This is achieved, and through this, relatively low-density compressed air moves to the upper pipe, and relatively low-density water and lubricating oil move downward.

In addition, the two modules separate the water and lubricating oil moving downward using a filter, and the water that passes through the filter moves to the bottom, and the filtered lubricating oil flows into the DTH Hammer along with compressed air through the internal pipe. It is characterized by being supplied.

In addition, the 3rd module uses the pressure difference to spray water moving downward to the outside of the "DTH Hammer dust prevention (reduction) air supply device" through the internal pipe, thereby preventing (reducing) dust inside the hole. It is characterized by performing a function.

The present invention will be described in detail with the accompanying drawings as follows. Figure 5 is a cross-sectional view of a hammer in which the air supply module of the present invention is assembled, Figure 6 is a configuration diagram of modules 1, 2, and 3 of the air supply system for dust reduction of the DTH Hammer of the present invention, Figure 7 is an external view of module 2 of the present invention, Figure 8 is an internal cross-sectional view of module 2 of the present invention, Figure 9 is a detailed internal cross-sectional view of module 2 of the present invention, Figure 10 is a cross-sectional view of module 3 of the present invention, and Figure 11 is a structural diagram of the DTH Hammer of the present invention.

In the present invention, an air supply module 10 is installed in the upper part of the case 100, and a hammer part 20 is installed in the lower part of the air supply module 10, and the air supply module 10 has an upper fluid supply hole ( A centrifugal separator (12) that rotates the fluid supplied through 11) in the circumferential direction and applies centrifugal force to the fluid to centrifuge it into water with a high specific gravity and lubricating oil with a low specific gravity;

A thermister unit 13 that filters out foreign substances from the centrifuged fluid;

a storage unit 14 in which the fluid from which the foreign substances have been filtered is stored;

It consists of a supply chamber (15) through which air containing lubricating oil, which is a fluid, passes through the partition and is supplied to the upper supply part of the hammer (20).

In addition, the centrifuged water is discharged through the outlet, absorbs dust, etc., and is discharged to the outside.

In addition, the storage unit stores fluid in which foreign substances have been filtered, with a partition wall formed upwardly inside the storage unit.

The Air Supply Module of the present invention separates water and lubricant supplied mixed with compressed air from the compressed air through centrifugation and demister filter, discharges the water to the bottom of the hammer case, and mixes the lubricant with compressed air again. Separation and mixing are carried out simultaneously so that it can be supplied to the hammer.

Water and oil condensed through centrifugation and demister filter form a layer due to the difference in fluid density, and inside the air supply module, which maintains a constant pressure, the water in the lower layer controls discharge through a check valve and high-pressure floating valve. It is discharged to the bottom of the hammer case, and the oil in the upper layer is supplied to a single hammer along with compressed air using the flow of compressed air.

The lubricating oil and water (moisture) supplied with compressed air through the drill rod are separated using centrifugation and a demister filter. The water prevents the spread of dust and fine dust in the underground drilling area, and the lubricating oil is supplied with compressed air through a single hammer. Extends the life of a single hammer through the features provided.

In other words, in the present invention, an air supply module 10 is installed at the top of the inside of the case 100, and a hammer part 20 is installed at the bottom of the air supply module 10, and the air supply module 10 is installed in the upper fluid supply hole. A centrifugal separator (12) that rotates the fluid supplied through (11) in the circumferential direction and applies centrifugal force to the fluid to centrifuge it into water with a large specific gravity and lubricating oil with a small specific gravity; Filtering out foreign substances from the centrifuged fluid A thermistor unit 13; a storage unit 14 in which the fluid from which the foreign substances have been filtered is stored; a supply chamber 15 in which air containing lubricating oil, which is a fluid, passes through the storage unit and is supplied to the upper supply part of the hammer 20; It consists of The centrifuged water is discharged through the outlet, absorbs dust, etc., and is discharged to the outside.

Meanwhile, the storage unit stores fluid from which foreign substances have been filtered, with a partition wall formed upward therein. An operating plate is installed on the upper part of the bulkhead and a coil spring is installed on the upper part of the operating plate. When the fluid in the reservoir exceeds a certain pressure and the operating plate overcomes the repulsive force of the coil spring and rises, air and lubricant pass through the gap between the bulkhead and the operating plate. I do it. The fixing plate on which the upper end of the coil spring is fixed so as to adjust the elastic force of the coil spring has a guide groove formed in the up and down direction inside the fixing cylinder, and a guide protrusion is formed on the outer peripheral surface of the fixing plate to slide in the up and down direction, and is moved from the outside of the fixing cylinder. Secure it so it does not move with a pin.

Therefore, in the present invention, the air supply module is assembled to the hammer, and the water in the air fluid supplied from the upper fluid supply hole of the case is separated and discharged, the remaining lubricating oil and air operate the hammer at the bottom, and the separately discharged water generates dust. It has a remarkable effect when used to suppress .

The "Air supply device for dust prevention (reduction) of DTH Hammer" of the present invention is assembled on top of the DTH Hammer, which performs drilling through impact energy in the underground drilling part, and performs the function of preventing dust.

The present invention is a technology that separates and supplies the compressed air, water, and lubricant mixed fluid supplied to the upper part of the rod connector part in three stages. The separated compressed air and lubricating oil are supplied to the inside of the DTH Hammer and used as the working fluid of the DTH Hammer, and the separated water is sprayed to the top of the DTH Hammer to prevent (reduce) the scattering of dust.

In the first stage, centrifugal separation is performed according to the density difference through a groove machined on the outside of the "Flow Rotation" part. Through this, relatively low-density compressed air moves to the upper pipe, and relatively low-density water and lubricant move downward. It moves. In the second stage, the water and lubricating oil moving downward are separated using a filter, the water passing through the filter moves to the bottom, and the filtered lubricating oil is inside the DTH Hammer along with compressed air through the internal pipe. In the third stage, the water moving downward is sprayed to the outside of the "DTH Hammer dust prevention (reduction) air supply device" through the internal pipe using the pressure difference to prevent dust inside the hole. reduce) function. The lubricating oil and water supplied with compressed air through the drill rod are separated through three stages using centrifugation and filters. The water is sprayed on the top of the DTH Hammer, and the lubricating oil and compressed air are mixed again and supplied inside the DTH Hammer.

The water sprayed on the top of the DTH Hammer has the function of preventing (reducing) the scattering of dust discharged to the ground, the lubricant has a lubricating function at the slip point of the internal parts of the DTH Hammer and extends the life of the parts, and the compressed air is used by the DTH Hammer. It functions as the working fluid of the hammer.

The basic structure of the DTH Hammer of the present invention will be described in detail as follows.

The back head is the inlet through which compressed air flows and is connected to the drill rod to transmit rotational force and driving force to the hammer.

The Air Distributor plays a role in controlling the flow of incoming compressed air.

The piston plays the role of generating striking force through reciprocating motion.

The check valve functions as a valve that controls the flow of compressed air.

The wear sleeve protects the internal parts and serves as a guide to the reciprocating motion of the piston.

The bit plays a role in transmitting the piston's impact energy to the rock.

Cylinder plays a role in controlling the reciprocating motion of the piston.

The operating principle is as follows.

In the first stage, with the piston in contact with the bit, high-pressure air flows into the upper part of the hammer (backhead), the pressure at the lower part of the piston (lower chamber) increases, and the piston rises. As the piston rises and the cylinder and air distributor are controlled, the compressed air flow path supplied to the lower chamber is closed, blocking the inflow of compressed air.

Even though the inflow of additional compressed air is blocked in the second stage, the piston rises due to inertia, and the lower chamber and the central pipe of the bit are opened and the compressed air in the lower chamber escapes. As the compressed air in the lower chamber escapes, the piston's rising speed increases. gradually decreases.

In the third stage, as the piston continues to rise due to inertia, a flow path is formed through the groove on the piston surface, the pressure in the upper chamber rises, and the piston stops rising and begins to fall due to the buffering force.

As the piston descends in step 4, the connection between the air distributor and the piston is released, which opens the upper chamber and lowers the pressure. On the other hand, the bottom of the piston is connected to the bit central pipe, so the lower chamber becomes sealed and the pressure rises. Accordingly, the piston descending speed decreases, hitting the bit and generating an impulse, and then returns to step 1 and repeats the above process.

Therefore, the present invention can be applied to most drilling tools that generate dust due to drilling, in addition to the DTH Hammer, and can prevent (reduce) the scattering of dust, contributing to the establishment of an eco-friendly construction system.

100: Case 10: Air supply module
20: hammer part 12: centrifugal separation part
13: Thermister unit 14: Storage unit
15 ; Supply chamber 16: coil spring
17: operating plate 18: fixing plate
19: fixed cylinder
①: Wear sleeve ②: Backhead ③: Backhead O-ring ④: Check valve
⑤: Check valve spring ⑥: Buffering ⑦: Air distributor
⑧: Air distributor O-ring ⑨: Cylinder
⑩: Piston ⑪: Space ⑫: Piston stop ring
⑬: Bit ring ⑭: Bit ring O-ring ⑮: Chuck : beat

Claims (3)

The mixed fluid of compressed air, water, and lubricant supplied to the upper part of the rod connector is separated into three modules (1, 2, and 3) and supplied sequentially. The separated compressed air and lubricant are stored inside the DTH Hammer. It is supplied to and used as the working fluid of the DTH Hammer, and the separated water is sprayed to the top of the DTH Hammer to prevent or reduce dust scattering.
The first module is DTH Hammer's mixed fluid separation system, characterized in that compressed air with low density moves to the upper pipe and water and lubricant with relatively low density move downward through centrifugal separation. The method of claim 1, wherein the two modules separate the water and lubricating oil moving downward using a filter, the water passing through the filter moves downward, and the filtered lubricating oil is moved along with compressed air through an internal pipe. DTH Hammer's mixed fluid separation system, characterized by being supplied inside the DTH Hammer The mixed fluid separation system of DTH Hammer according to claim 2, wherein the three modules spray water moving downward through an internal pipe to the outside of DTH Hammer's dust reduction air supply device.