KR20210052411A - Low noise rod sealing unit and vacuum drill using it - Google Patents

Abstract

The present invention relates to a low-noise rod sealing unit which comprises: a mainframe unit which has a sound insulation space and a support engagement unit on one end unit on one side; a drifter in the sound insulation space of the mainframe unit to be supported by a forward/backward transfer unit and moved forward/backward in the sound insulation space; a rod installed on the drifter to be taken out from the sound insulation space of the mainframe unit; a low-noise rod sealing unit having a base member which has a penetrating hole corresponding to a rod takeout hole of the vacuum drill mainframe unit, and a housing member having a rod support unit which is supported to be suspended by an elastic member which prevents the vibration of the rod from being transferred to the base member and which slidably and rotatably supports the rod; and a vibration generation unit installed on the mainframe unit to make the inside the sound insulation space vacuum and introduce external air to cool the drifter. The present invention aims to provide a low-noise rod sealing unit and a vacuum drill using the same, which are able to prevent dust from being introduced into a mainframe unit.

Description

Low noise rod sealing unit and vacuum drill using it}

The present invention relates to a vacuum drill, and more particularly, by forming a sound insulation space of the vacuum atmosphere around the noise generating part of the main body, it is possible to reduce the spread of noise, and dust and foreign substances generated during drilling are transferred to the sound insulation space of the main body. It relates to a low-noise rod sealing unit capable of preventing inflow and a perforation drill using the same.

In general, when large rock mass is found during civil works to construct roads, tunnels, buildings, etc. in mountainous and urban areas, the rock crushing method to remove this rock mass is to form a number of perforated holes in the rock mass. The method of blasting by installing explosives in the wall and the method of repeatedly striking and crushing the rock using a breaker are used. In particular, in urban areas, due to the influence of vibration, noise, dust, etc. on surrounding structures and human body, drilling holes in the rock mass, inserting the winger provided in the crusher into the drilling hole, expanding the hole, and inducing cracks from the drilled hole. A vibration-free rock crushing method is used.

A perforator for forming a plurality of perforated holes in rock in order to perform the above construction method is disclosed in Korean Patent Application Laid-Open No. 10-2010-0108164. The posted perforator frame is mounted on the tip of the excavator arm; A moving block installed in the frame to move along a guide provided in the frame; Elevating means installed on the frame and connected to the moving block to move the moving block; And a core drill installed on the moving block and configured to perform a drilling operation while rotating by receiving rotational force generated from a rotating motor.

Such a perforator cannot fundamentally solve the noise problem because the vibration of the core drill and noise generated from the driving unit are not blocked when the arm is crushed.

Korean Patent Registration No. 10-1577217 (2015.12.08.) discloses a low-noise drilling machine, and Korean Patent Publication No. 2014-0128550 (2014.11.06.) discloses a jackhammer.

The posted jackhammer includes a feed beam on which a drifter is installed; A beam holder on which the feed beam is slidably installed; It includes a case for shielding the drifter and the feed beam, the case has a configuration installed in the beam holder.

The above-described rock drill has a case that shields the drifter and the feed beam to block noise generated from the drifter and the feed beam, but the case is not a sealed structure, so the noise blocking effect is not high. Noise due to resonance cannot be reduced.

In addition, Korean Patent Publication No. 2012-0039856 (2012.04.26.) discloses a long-depth slot forming device and a vibration-free rock excavation method using the same, and Korean Patent No. 10-1896100 (2018.08.31.) discloses a low-noise drilling machine. Has been posted.

The posted low-noise perforator includes: a rod driving member having a rocking rod extending in the longitudinal direction and a drifter fixed to be movable from the support plate to drive the rocking rod; A sealed housing in which a rod driving member is accommodated inside so that the rocking rod can be pulled out by being divided and fastened into a plurality, and a sealed housing in which a sound absorbing material and a heat insulating material are stacked on the inner surface, and dust that collects dust generated by the rocking rod at the tip of the sealed housing It includes a collecting member. In addition, a pair of brushes is installed in the opening of the sealing housing to shield internal noise.

The perforator configured as described above reduces noise generated therefrom by wrapping the drifter using a sealed housing. However, the noise attenuation effect cannot be expected greatly.

Korean Patent Application Publication No. 2020-0045994 discloses a low-noise rock drill. The posted low-noise rock drill has a problem in that dust or foreign matter generated when drilling is introduced into the interior through the sealing part supporting the shank part with respect to the main body part.

Republic of Korea Patent Registration No. 10-1577217 (2015.12.08.) Republic of Korea Patent Publication No. 2014-0128550 (2014.11.06.) Republic of Korea Patent Publication No. 2012-0039856 (2012.04.26.) Korean Patent Registration No. 10-1896100 (2018.08.31.)

The present invention is to solve the above-described problems, by forming a sound insulation space that blocks noise generated from the drifter and noise due to the vibration of the rod, it is possible to prevent the noise from being transmitted and spread to the outside, It is to provide a low-noise rod sealing unit and a vacuum drill using the same, which can prevent dust from flowing into the main body through a portion where the rod for perforation is drawn out from the main body.

Another object of the present invention is to provide a vacuum drill capable of blocking noise generated during drilling work by a bit installed at the end of a rod and preventing the diffusion of dust.

The low-noise rod sealing unit for achieving the above object is supported so as to be suspended by a base member having a through hole corresponding to the rod withdrawal hole of the vibration drill main body, and an elastic member that prevents the vibration of the rod from being transmitted to the main unit. And a housing member having a rod support portion that supports the rod so as to be slidably and rotatably supported.

In the present invention, the rod support portion of the housing member has a sealing groove that is inserted along the inner circumferential surface, and a pneumatic atmosphere of a predetermined pressure is formed around the rod support portion by supplying pneumatic pressure to the sealing groove, thereby rotating and front and rear of the rod. It is equipped with a pneumatic supply unit that blocks dust from flowing into the rod support unit along the outer circumferential surface of the rod during dusting.

The pneumatic supply unit includes a pneumatic supply pipe in communication with the sealing groove of the rod support unit, and a pneumatic supply source for supplying pneumatic pressure to the pneumatic supply pipe, and the pneumatic supply source is connected to the pneumatic supply pipe, and pneumatic pressure at the end of the drift. It consists of a pneumatic discharge unit that is discharged.

To achieve the above object, the vacuum drill of the present invention has a sound insulation space inside and a support coupling part at one end thereof, and is supported by a transfer unit before and after the sound insulation space of the body part. , A drifter that moves backward, and a rod installed on the drifter and drawn out from the sound insulation space of the main body,

A rod that is supported so as to be suspended by a base member having a through hole corresponding to the rod lead-out hole of the vibration drill main body, and an elastic member that prevents the vibration of the rod from being transmitted to the main unit, and supports the rod so as to be slidable and rotatable A low-noise rod sealing unit having a housing member having a support portion,

It is installed in the main body and includes a vacuum generating unit for vacuuming the inside of the sound insulation space and for cooling the drifter by blowing in outside air.

In the present invention, the rod support part of the housing member is formed in the sealing groove so as to be inserted along the inner circumferential surface, and when the rod rotates and moves forward and backward by supplying pneumatic pressure to the sealing groove, dust is removed from the rod support part along the outer circumferential surface of the rod. It is provided with a pneumatic supply unit that blocks the inflow of the into.

In addition, the front and rear transfer units include at least one guide member installed inside the main body, a transfer member slidably installed on the guide member and installed with the drifter, and the transfer frame installed in the main body. It has an actuator that moves forward and backward.

The vacuum generating unit includes an outside air intake hole for allowing outside air for cooling formed in the main body to flow into the differential pressure space, and a vacuum pump connected by the differential pressure space of the main body and an exhaust pipe.

The low-noise rod sealing unit and the vacuum drill using the same according to the present invention can reduce drift when a hole is formed in the rock or noise generated from the bit installed at the rod and its end. Noise generated from the beat is transmitted to the main body and resonates, thereby preventing the noise from being amplified.

In addition, the low-noise rod sealing unit and the vacuum drill using the same according to the present invention can maximize the cooling effect of drift by allowing external air to flow into the sound-insulating space through the external air intake hole while maintaining the sound-insulating space as a vacuum.

1 is a cross-sectional view of a drilling drill having a low-noise rod sealing unit according to the present invention,
2 is a cross-sectional view showing an excerpt of a portion where the low noise rod sealing unit according to the present invention is installed;
3 is a cross-sectional view of a low noise rod sealing unit according to the present invention shown in FIG. 2 installed;
Figure 4 is a side view showing the state of the drilling drill according to the present invention is mounted on the boom of the excavator to form a drilling hole in the rock,
5 is a cross-sectional view showing a state in which a drilling operation is performed by the drilling drill shown in FIG. 4.

An embodiment of a low noise rod sealing unit capable of reducing noise and vibration according to the present invention and a vacuum drill using the same are shown in FIGS. 1 to 4.

Referring to the drawings, in the present invention, the vacuum drill 10 is for forming a perforated hole in the rock mass, and has a sound insulation space 21 therein, and a support coupling that is coupled to the boom 210 of the excavator 200 at one end thereof. The body part 20 having the part 22 and the sound insulation space 21 of the body part 20 are supported by the transfer unit 30 before and after the sound insulation space 21 to move forward and backward in the sound insulation space 21. The rod 51 includes at least one drift 50 that is installed so as to be drawn in and out of the sound insulation space 21 of the body. In addition, it is installed on the lower surface of the main body 20 to guide the rod 51 and maintain airtightness between the sound insulation space 21 and the outside air. ) And a low-noise rod sealing unit 70 that prevents resonance from occurring. A bit unit 55 for perforating rock mass is installed on the rod 51.

In addition, a vacuum generating unit 90 installed in the main body 20 to vacuum the inside of the sound insulation space 21 and injecting outside air to cool the drifter 50 is provided, and the main body ( The lower side of 20) is provided with a discharge unit 100 that prevents the spread of noise and dust generated during drilling of the rock mass and discharges the dust and chips of the rock produced during drilling.

The low-noise jackhammer according to the present invention configured as described above will be described in more detail for each component as follows.

The body part 20 of the vacuum drill 10 according to the present invention has a sound insulation space 21 formed therein in the longitudinal direction. The main body part 20 is not limited by the above-described embodiment, and while the drift 50 surrounds the drift 50 and moves forward and backward, the rod 51 installed therein may perform a drilling operation while moving forward or backward. It is possible if the structure has a sound insulation space that can have a stroke distance.

The front and rear transfer units 30 are installed inside the main body 20 to support the drifter 50 and to move forward and backward, and to be located in the sound insulation space 21 At least one transfer guide member 31 is formed in (20) in the longitudinal direction. A transfer member 32 that slides along the transfer guide member 31 is installed, and a drifter 50 is installed in the transfer member 32 so that the sound insulation space 21 is moved according to the movement of the transfer member 32. Forward and backward from the inside. In addition, an actuator for moving the transfer member 32 forward and backward along the transfer guide member 31 is installed inside the main body 20. The actuator may be a cylinder 35 using hydraulic or pneumatic pressure, and the cylinder body 35a constituting the actuator is installed in parallel with the transfer guide member 31 in the body 20, and The rod 35b is hingedly connected to the transfer member 32 in which the dripper 50 is installed. The actuator is not limited by the above-described embodiment, and may be any structure capable of moving the transfer member 32 along the guide member 32.

On the other hand, the rod 51 of the drifter 50 installed on the transfer member 32 is advanced from the sound insulation space 21 in the perforation direction of the rock mass when the transfer member 32 moves forward, and the transfer frame 30 moves backward. The portion except the end of the pilot 51 and the bit 55 installed therein flows into the sound insulation space.

As the transfer frame 30 moves forward and backward in this way, the rod 51 is supported by the low-noise rod sealing unit 70 so that when the rod 51 is driven, vibration is transmitted to the main body 20 to resonate. Is prevented.

The low-noise rod sealing unit 70 includes a base member 72 installed in the main body 20 and having a through hole 71 through which the rod 51 passes, as shown in FIG. 2. In addition, an elastic member 73 having a through hole corresponding to the through hole 71 is installed in the base member 72, and a rod support portion supporting the rod 51 in a slidable and rotatable manner ( A housing member 75 having 80 is installed.

The rod support part 80 installed in the housing member 75 may be formed of a rod support bushing installed in the housing member 75, and the sound insulation space 21 is formed by blocking the through hole of the elastic member 73. Sealed.

A plurality of sealing members 82 for maintaining airtightness are installed between the outer circumferential surface of the rod 51 and the inner circumferential surface of the rod support 80 on the inner circumferential surface of the rod support 80.

And a sealing groove 82 is formed on the inner circumferential surface of the end side of the rod support unit 80 so as to be inserted along the inner circumferential surface, and the rod support unit 80 supplies pneumatic pressure to the sealing groove 82 to rotate the rod and A pneumatic supply unit 85 is installed to prevent dust from flowing into the rod support unit 80 along the outer circumferential surface of the rod 51 during forward and backward movement.

The pneumatic supply unit 85 is fixed to the rod support unit 80 to supply a predetermined pneumatic pressure to the sealing groove 82 and a pneumatic pressure supply pipe 86 for supplying a small pneumatic pressure to the pneumatic supply pipe 85 It includes a supply source (87). The pneumatic supply source may be composed of a compressor for supplying pneumatic pressure to the pneumatic supply pipe (86). However, the present invention is not limited thereto, and the air pressure discharged from the discharge pipe that is formed in the drifter 50 to drive the drifter and discharge the pneumatic pressure or the discharge pipe discharged from the discharge port discharged from the vacuum pump of the vacuum generating unit 90 Can be made.

In addition, although not shown in the drawings, the pneumatic supply pipe 85 may be further provided with a lubricating oil supply unit so that lubricating oil is formed and supplied to air supplied through the pneumatic supply pipe 85.

And the vacuum generating unit 90 is for cooling the drifter 50 while maintaining a predetermined vacuum pressure inside the sound insulation space 21 of the main body 20, It includes a vacuum pump 92 connected to the exhaust pipe 91 installed to communicate with the sound insulation space 21. The body part 20 is formed with an outside air intake hole 95 for injecting outside air in order to cool the drifter 50. The amount of air introduced through the outside air intake hole 95 should be relatively smaller than the amount of exhaust discharged by the vacuum pump 92 so that the vacuum inside the soundproof space can be maintained by the vacuum pump 92. .

On the other hand, the discharge unit 100 is installed on the lower side of the body part 20 to prevent the spread of noise and dust generated during drilling of the rock mass, and discharge the dust and chips of the rock mass generated during drilling. It is installed on the lower end side of the main body 20

The low noise rod sealing unit (70) and a first sub body portion (101) that surrounds the outer circumferential surface of the rod and forms a discharge chamber (102) for discharging dust and chips generated during drilling therein, and the first sub It is provided on the outer circumferential surface of the main body 101 and includes a discharge pipe 103 for discharging chips and dust generated when drilling into the rock mass. The discharge pipe 103 is connected to a discharge fan or a pump (not shown) capable of inhaling and discharging dust not shown in the drawing.

I can.

In addition, a second sub body portion 110 coupled to the first western body portion 101 and having a support protrusion 111 for supporting the body portion 20 formed on an outer circumferential surface thereof, and the second sub body portion 110 ) Is supported and the end is in close contact with the perforated rock mass and is provided with a buffer cover member 112 that prevents dust and discharge chips during drilling by a bit 55 installed at the end of the rod 51. The buffer cover member 112 may be made of rubber, synthetic rubber material, synthetic resin, or non-ferrous metal having elasticity, or may be formed by combining them.

The operation of the drilling drill according to the present invention configured as described above will be described as follows.

In order to drill a hole in the rock by using the perforator having a low-noise rod sealing unit according to the present invention, as shown in Figs. 1, 2, 4 and 5, drilling in a state mounted on the boom 210 of the excavator 200 The buffer cover member 112 is in close contact with the rock in the atmosphere for forming the hole. At this time, since the rod 51 is inserted into the sound insulation space 20 of the main body 20, the bit 55 installed at the end of the rod 51 is blocked from the outside by the buffer cover member 112. Will be maintained.

In this state, each drifter 50 connected to the rod 51 is driven and the cylinder 35 of the transfer unit 30 is operated so that the transfer member 32 descends along the guide transfer member 31. . Accordingly, the drive of the drister 50 causes the bit unit 55 installed in the rod 51 to move forward while vibrating and rotating.

In this way, the drift 50 supported by the transfer member 32 moves forward in the interior of the main body 20 like the transfer frame 30, and the rod 51 is Drilling is performed while advancing from the inside. Accordingly, the bit unit 55 installed on the rod 51 drills the rock to a predetermined depth. Although it is not shown in the drawing in the process of perforating the rock mass, the high-pressure air driven by the drifter 50 is discharged through the hollow portion of the rod 51 and the bit unit 55, which is generated when the rock is drilled by the bit unit. Chips and dust, that is, rock fragments and dust generated during drilling are discharged to the outside through the discharge pipe 103. When a discharge fan or a pump is installed in the discharge pipe 103, the discharge effect may be increased.

As described above, in the process of drilling the rock by the drilling drill 10, the noise generated when the drifter 50 is driven and the noise generated by the vibration of the rod part 51 due to the repulsive force during the drilling of the rock mass are It is partitioned from the outside and is blocked by the sound insulation space 21 in which the vacuum pressure is maintained, thereby reducing or extinguishing. In particular, since the noise generated by the vibration of the rod 51 is located inside the sound insulation space 21 from the time when the initial drilling is completed to the time when the drilling is completed, the noise caused by the vibration of the rod 51 is attenuated.

In particular, since the rod 51 is supported by the low-noise rod silly unit 70, it is possible to prevent the vibration and noise of the rod from being transmitted to the main body 20, and dust generated during drilling can be prevented from being transmitted to the rod 51 ) Can be prevented from flowing into the interior of the sound insulation space.

The outer circumferential surface of the rod 51 is supported by the rod support portions 80 on which the sealing members 82 are installed, and the rod support portion 80 is supported by the elastic member 73, so the generated from the rod 51 Vibration and noise are blocked.

In particular, a sealing groove 82 is formed on the inner circumferential surface of the end side of the rod support unit 80 so as to be inserted along the inner circumferential surface, and pneumatic pressure is supplied to the pneumatic supply source 87 through the pneumatic supply pipe 86 in the sealing groove 82. Since the high pressure is maintained higher than the surroundings to prevent foreign matters from entering around the lot support unit 80, dust can prevent foreign matters from entering between the outer circumferential surface of the rod 51 and the inner circumferential surface of the rod support unit 80. have. In particular, since the lubricating oil can be supplied to the air supplied through the pneumatic supply pipe 86 to the sealing groove 82, the lubrication effect can be increased.

And after the outside air continuously flows into the inside of the sound insulation space through the outside air intake hole 93 formed in the main body 20 where the vacuum of the sound insulation space 21 is formed by the vacuum generating unit 90, the vacuum pump 92 Because it is discharged to the outside by ), it is possible to prevent the heat from accumulating in the sound insulation space 21, and further, it is possible to cool the drifter 50.

As described above, the low-noise rock drill according to the present invention can prevent the noise and vibration generated from the drifter from being transmitted to the outside through the main body by maintaining a predetermined vacuum pressure in the sound insulation space. In addition, since the drifter has a structure that moves forward and backward in the sound insulation hole space, it is possible to prevent dust or foreign matter from entering between the outer circumferential surface of the rod and the inner circumferential surface of the rod support.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the appended registration claims.

Claims (8)

A rod that is supported so as to be suspended by a base member having a through hole corresponding to the rod lead-out hole of the vibration drill main body, and an elastic member that prevents the vibration of the rod from being transmitted to the main unit, and supports the rod so as to be slidable and rotatable Low noise rod sealing unit of a vacuum drill, characterized in that it has a housing member having a support part The method of claim 1,
The rod support part of the housing member is formed in the sealing groove so as to be inserted along the inner circumferential surface, and air pressure is supplied to the sealing groove to prevent dust from flowing into the rod support part along the outer circumferential surface of the rod when the rod rotates and moves forward and backward. Low noise rod sealing unit of a vacuum drill, characterized in that it has a pneumatic supply unit. The method of claim 1,
The pneumatic supply unit includes a pneumatic supply pipe communicating with the sealing groove of the rod support unit, and a pneumatic supply source for supplying pneumatic pressure to the pneumatic supply pipe, and the pneumatic supply source is connected to the pneumatic supply pipe, and the pneumatic pressure at the end of the drift Low noise rod sealing unit of a vacuum drill, characterized in that consisting of a pneumatic discharge unit to be discharged A body part having a sound insulation space inside and a support coupling part at one end thereof,
A drifter that is supported by a transfer unit before and after the sound insulation space of the main body and moves forward and backward in the sound insulation space, a rod installed on the drifter and drawn out from the sound insulation space of the main body;
A rod that is supported so as to be suspended by a base member having a through hole corresponding to the rod lead-out hole of the vibration drill body, and an elastic member that prevents the vibration of the rod from being transmitted to the body part, and supports the rod so as to be slidable and rotatable A low-noise rod sealing unit having a housing member having a support portion,
And a vacuum generating unit installed on the main body to vacuum the inside of the sound insulation space and to cool the drifter by injecting outside air. The method of claim 4,
The rod support part of the housing member is formed in the sealing groove so as to be inserted along the inner circumferential surface, and air pressure is supplied to the sealing groove to prevent dust from flowing into the rod support part along the outer circumferential surface of the rod when the rod rotates and moves forward and backward. A vacuum drill, characterized in that it has a pneumatic supply unit. The method of claim 4,
The front and rear transfer units include at least one guide member installed inside the main body, a transfer member slidably installed on the guide member and installed with the drifter, and the transfer frame installed in the main body before and after the transfer frame. A vacuum drill, characterized in that it has an actuator that advances. The method of claim 4,
The vacuum generating unit comprises an outside air intake hole for allowing outside air for cooling formed in the main body to flow into the differential pressure space, and a vacuum pump connected by the differential pressure space of the main body and an exhaust pipe. The method of claim 4,
It is installed on the main body to prevent the conversion of noise and dust generated during drilling of the rock mass, and to discharge dust and chips from the rock that is generated during drilling. It is installed at the lower end of the main body to reduce the noise. The first sub-body part that surrounds the rod sealing unit and the outer circumferential surface of the rod to form a discharge chamber for discharging dust and chips generated during drilling therein, and a first sub-body part installed on the outer circumferential surface of the first sub-body part to be generated when drilling into the rock mass A discharge pipe for discharging chips and dust,
The second sub-body part is coupled to the first western part and has a support protrusion formed on the outer circumferential surface to support the main body part, and the second sub-body part is supported on the second sub-body part, and is installed at the end of the rod in close contact with the perforated rock mass. Drilling drill, characterized in that it comprises a discharge unit having a buffer cover member to prevent dust and discharge chips when drilling by a bit.

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