Dustproof and antifouling device of pneumatic down-the-hole hammer for cultural relic protection

Abstract

The dustproof and antifouling device of the pneumatic down-the-hole hammer for cultural relic protection comprises a drill rod sleeve, a flexible dust cover communicated with the drill rod sleeve is arranged on the head portion of the drill rod sleeve in a sleeved mode, and the flexible dust cover is composed of a circular-truncated-cone-shaped rubber sleeve dust cover and an annular brush strip located at the front end of a large opening of the rubber sleeve dust cover. A suction opening is formed in the middle of the drill rod sleeve; a pair of sleeve fixing plates with drill rod through holes is arranged at the tail part of the drill rod sleeve, and a soft plastic plate with the same shape as the sleeve fixing plates is arranged between the two sleeve fixing plates; a plurality of brush rings are fixedly mounted at the tail part of the inner side of the drill rod sleeve, and through holes are formed in the centers of the brush rings, so that the drill rod penetrates through the centers of the brush rings; the sleeve fixing plate on the outer side is welded to a drilling machine arranged on the side face of the drill rod sleeve, and the drilling machine pushes the drill rod sleeve to move front and back. The equipment is simple in structure, convenient to mount and use, good in contact sealing performance with rock surfaces with different concave-convex degrees, dry-type dust removal and good in dust removal effect.

Description

Technical Field

[0001] The utility model relates to a dust and pollution prevention device for a drilling rig, in particular to a dust and pollution prevention device for a down-the-hole hammer drilling rig used for cultural relics protection. Background Art

[0002] Pneumatic down-the-hole hammers are often used in the protection and restoration of cultural relics. Currently, there are many gaps between the sleeve of the dust-proof equipment of the pneumatic down-the-hole hammer's drilling rig and the uneven rock surface, resulting in a lot of dust leakage during drilling operations, and damaged device components are difficult to replace. If wet dust suppression is used, the mud generated will harm the cultural relics themselves.

[0003] Chinese Patent CN 213087940 U discloses a dust-proof device for a drilling rig for earthen ruins, comprising a first cover body and a second cover body, each of which is composed of a first semi-conical side panel, a second semi-conical side panel, and a third semi-conical side panel connected in sequence. The first semi-conical side panels of the first and second covers form a first conical side cover, the second semi-conical side panels of the first and second covers form a second conical side cover, and the third semi-conical side panels of the first and second covers form a third conical side cover. The first conical side cover is provided with a fastening structure for connecting to the drill rod of the drilling rig. The utility model collects dust and debris that rebounds toward the drilling rig main body during drilling operation and promptly removes the dust and debris. The dust-proof device has a simple structure and is easy to install and disassemble. This patent only collects the dust and debris that rebounds toward the main body of the drilling rig during the operation of the drilling rig, and does not extract or remove the dust; the device is made of stainless steel, and there are many gaps between it and the rock and soil surface layer, so dust is easy to overflow.

[0004] Chinese patent CN 207111009 U discloses a dust and pollution prevention device for a down-the-hole hammer drill, comprising a sleeve, a spray pipe, and a slag removal port. The top of the sleeve is configured as a U-shaped sleeve, the opening of which extends vertically to the side of the sleeve to form a mounting port. The sleeve is mounted at the bottom of the drill rig, and the U-shaped sleeve is sized to fit the drill boom. A spiral metal spray pipe is welded to the inner wall of the sleeve, the end of which passes through the outside of the sleeve and is connected to a water inlet pipe for water supply. Sprinklers are evenly distributed along the spray pipe and connected to an external water pump. A slag removal port is provided at the bottom of the sleeve, with a rubber curtain installed at its upper edge and a protective cover welded to the outside of the port. This patented operation requires a large amount of water resources and is less suitable for use in arid, water-scarce, and cold regions. The mud generated during the operation can easily damage the cultural relics themselves and the environment in which they are stored.

[0005] Chinese patent CN 108252666 A discloses a seamless, fitted dust cover for down-the-hole drilling rigs. The cover comprises a housing that is sleeved onto the drill rig, an annular sealing cover made of a soft elastic material positioned at the bottom of the housing, and an annular sleeve of the same material positioned at the bottom of the sealing cover. The sleeve contains several steel balls, which ensure the sealing cover remains stretched downward by the weight of the steel balls. This patent, which relies on the downward stretching seal of the steel balls, is only suitable for straight hammer drilling and drilling at low angles; damaged components are difficult to replace.

[0006] Chinese patent CN 204082049 U discloses a dust-proof device specifically designed for earthenware drilling rigs. The device consists of a shaped cylinder secured by a locking positioning bracket, ensuring the proper operation of the drill rod within the cylinder during drilling. Multiple dust baffles within the cylinder effectively reduce the rate of slag discharge from the drill hole. A dust-proof closing mechanism effectively blocks dust outflow, creating a swirling flow within the dust-proof device. This device, regardless of size, slows down the slag particles through multiple barriers and concentrates them out through the outlet. This patented dust-proof device requires a positioning bracket for hoisting, positioning, and reinforcement, making it unsuitable for most environments. Furthermore, gaps exist between the device and the uneven rock surface, allowing dust to escape.

[0007] Chinese patent CN 203547605 U discloses a dust shield for a drilling rig, comprising a truncated cone-shaped shield. The shield's small conical surface is welded and sealed with a circular steel plate of the same material. The circular steel plate has a through hole at its center, and the shield has a sewage outlet. A circular spray device with a nozzle is mounted on the small conical surface. One side of the small conical surface is connected to a fengshui mixing device. The shield is mounted at the end of a drill rod connected to the drilling rig's feed device, with the center of the drill hole as a reference. This patented shield, made of steel plate, does not maintain close contact with the uneven rock surface, allowing dust to escape through the contact gap. The spray device used during operation can generate mud that can harm the cultural relics themselves.

[0008] When the existing drilling rig dust prevention equipment adopts dry dust removal operation, the dust prevention device has poor contact with the uneven rock surface, and there are many dust overflow channels; the connection between the tail of the drill pipe sleeve and the drill pipe is poor, and there are large dust overflow channels; wet operation produces less dust, but the mud and sewage produced will threaten the safety of the cultural relics and their storage environment. Utility Model Content

[0009] The invention aims to overcome the deficiencies of the above-mentioned prior art and provide a dust and pollution prevention device for a pneumatic down-the-hole hammer used for cultural relics protection. The device adopts dry dust removal, is suitable for rock surfaces with different degrees of concave and convexity, and has good dust removal effect.

[0010] The utility model is realized in this way: a dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection comprises a drill rod sleeve, a drill rod and a hammer passing through the drill rod sleeve, a flexible dust cover in communication with the drill rod sleeve is sleeved on the head of the drill rod sleeve, the flexible dust cover is composed of a truncated cone-shaped rubber sleeve dust cover and an annular brush strip located at the front end of the large opening of the rubber sleeve dust cover; an exhaust port is opened in the middle of the drill rod sleeve; a pair of sleeve fixing plates with drill rod through holes are provided at the rear end of the drill rod sleeve, and the sleeve on the inner side is provided with a plurality of air outlets; a plurality of air outlets are provided at the rear end of the drill rod sleeve ... The fixing plate is fixed at the tail of the drill pipe sleeve, and a soft plastic plate of the same shape as the sleeve fixing plate is arranged between the two sleeve fixing plates. The soft plastic plate and the outer sleeve fixing plate are fixed to the inner sleeve fixing plate by bolts on the edge; a plurality of brush rings are fixedly installed at the tail of the inner side of the drill pipe sleeve, and the center of the brush ring has a through hole so that the drill pipe passes through the center of the brush ring; the outer sleeve fixing plate is welded to the drilling rig arranged on the side of the drill pipe sleeve, and the drilling rig pushes the drill pipe sleeve back and forth.

[0011] The small opening end of the rubber sleeve dust cover is sleeved on the front end of the drill rod sleeve and fastened by iron wire.

[0012] The tail of the drill pipe sleeve adopts three brush rings.

[0013] The sleeve fixing plate and the soft plastic plate are both square plates with screw holes at the four corners. A thin slit is cut along the edge of the reserved circular hole in the center of the soft plastic plate towards the four corners, and the length of the slit does not exceed the outer edge of the drill pipe sleeve.

[0014] The diameter of the drill rod sleeve is 160mm, and the diameter of the exhaust port is 100mm; the diameter of the small end of the cone of the rubber dust cover is 160mm, and the diameter of the large end of the cone is 400mm; the thickness of the annular brush strip is 5mm, the width is 100mm, and the length is 120mm; the diameter of the brush ring is 159mm, the thickness is 3mm, and a 35mm diameter circular hole is reserved in the center of the brush ring. The outer edge of the brush ring is reinforced with iron bars; the soft plastic plate is a square plastic plate with a side length of 180mm. A 45mm diameter circular hole is reserved in the center of the plastic plate, and a 60mm long seam is cut from the edge of the circular hole to the four top corners of the plastic plate.

[0015] The advantages and technical effects of the utility model are as follows: the equipment has a simple structure, is easy to install and use, has a low manufacturing cost, is strong and durable and easy to purchase, has good sealing performance when in contact with rock surfaces of different degrees of concavity, and has dry dust removal and good dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection provided by an embodiment of the present utility model;

[0017] Figure 2This is a schematic structural diagram of a brush ring provided by an embodiment of the present utility model;

[0018] Figure 3 It is a structural schematic diagram of a soft plastic plate provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0022] Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. A person skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] The electrical devices, controllers, etc. described in the present invention are all conventionally configured, and the electrical connection method is also conventional.

[0025] like Figure 1-3As shown, the dust and pollution prevention device of the pneumatic down-the-hole hammer for cultural relics protection of the present invention includes a drill sleeve 1, a drill rod 12 and a hammer 13 passing through the drill sleeve 1, a flexible dust cover in communication with the drill sleeve is sleeved on the head of the drill sleeve 1, and the flexible dust cover is composed of a truncated cone-shaped rubber dust cover 15 and an annular brush strip 16 located at the front end of the large opening of the rubber dust cover 15; an exhaust port 14 is opened in the middle of the drill sleeve 1; a pair of sleeve fixing plates 4 with drill rod through holes are provided at the rear end of the drill sleeve 1, and the sleeve fixing plates 4 on the inner side are provided. Fixed at the tail of the drill pipe sleeve 1, a soft plastic plate 18 of the same shape as the sleeve fixing plate is arranged between the two sleeve fixing plates 4, and the soft plastic plate 18 and the outer sleeve fixing plate 4 are fixed to the inner sleeve fixing plate 4 by the bolts 2 at the edge; a plurality of brush rings 17 are fixedly installed at the tail of the inner side of the drill pipe sleeve 1, and the center of the brush ring 17 has a through hole, so that the drill pipe 12 passes through the center of the brush ring 17; the outer sleeve fixing plate is welded to the drilling rig arranged on the side of the drill pipe sleeve 1, and the drilling rig pushes the drill pipe sleeve 1 to move back and forth.

[0026] In this embodiment, the small open end of the rubber dust cover 15 is placed over the front end of the drill pipe sleeve 1 and secured with wire 10. Three brush rings 17 are used at the rear of the drill pipe sleeve 1. Both the sleeve fixing plate 4 and the soft plastic plate 18 are square plates with screw holes at the four corners. A narrow slit is cut along the edge of the reserved circular hole in the center of the soft plastic plate 18 toward each of the four corners, with the length of the slit not exceeding the outer edge of the drill pipe sleeve 1.

[0027] In this embodiment, the diameter of the drill pipe sleeve 1 is 160mm, and the diameter of the exhaust port is 100mm; the diameter of the small end of the cone of the rubber sleeve dust cover is 160mm, and the diameter of the large end of the cone is 400mm; the thickness of the annular brush strip 16 is 5mm, the width is 100mm, and the length is 120mm; the diameter of the brush ring 17 is 159mm, the thickness is 3mm, and a circular hole with a diameter of 35mm is reserved in the center of the brush ring. The outer edge of the brush ring is reinforced with an iron bar; the soft plastic plate 18 is a square plastic plate with a side length of 180mm, and a circular hole with a diameter of 45mm is reserved in the center of the plastic plate. A 60mm long seam is cut from the edge of the circular hole to each of the four top corners of the plastic plate.

[0028] Specifically, the sleeve fixing plate 4 on the inner side of the rear end of the drill pipe sleeve 1 is fastened to the outer sleeve fixing plate 4 by an M8 diameter hexagonal bolt 2. The outer sleeve fixing plate 4 is fixed to the motor 7. The front end of the drill pipe sleeve 1 is fastened to the flexible dust cover with wire 10. The drill pipe 12 and impactor 13 pass through the drill pipe sleeve assembly. The right side of the drill pipe sleeve 1 has an exhaust port 14 for the drill pipe sleeve. The drill pipe sleeve 1 can move forward and backward with the motor 7.

[0029] The use of the inner sleeve fixing plate and the outer sleeve fixing plate facilitates the disassembly and assembly of the motor 7 and facilitates maintenance and dust cleaning.

[0030] The tail of the drill pipe sleeve 1 is sealed by three brush rings 17 and a soft plastic plate 18 .

[0031] The utility model has a simple structure, is easy to install and use, has low cost, is suitable for rock surfaces with different degrees of unevenness, and has good dust removal effect. The flexible dust cover at the front end of the drill pipe sleeve can closely contact the uneven rock surface, sealing the drill hole opening to prevent dust from escaping. The rear end of the drill pipe sleeve uses a soft brush layer and a flexible plastic plate to seal the drill pipe sleeve space. Dust is discharged through the exhaust port on the side of the drill pipe sleeve. The drill pipe sleeve slides back and forth to strengthen the contact between the flexible dust cover and the rock surface, and also facilitates the cleaning of dust and rock debris inside the flexible dust cover.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection, comprising a drill sleeve (1), a drill rod (12) and a hammer (13) passing through the drill sleeve (1), characterized in that: A flexible dust cover is provided on the head of the drill rod sleeve (1) and is communicated with the drill rod sleeve. The flexible dust cover is composed of a truncated cone-shaped rubber dust cover (15) and an annular brush strip (16) located at the front end of the large opening of the rubber dust cover (15); an air exhaust port (14) is provided in the middle of the drill rod sleeve (1); a pair of sleeve fixing plates (4) with drill rod through holes are provided at the rear end of the drill rod sleeve (1); the inner sleeve fixing plate (4) is fixed to the rear end of the drill rod sleeve (1), and a sleeve fixing plate (16) is provided between the two sleeve fixing plates (4). A soft plastic plate (18) of the same plate shape is provided. The soft plastic plate (18) and the outer sleeve fixing plate (4) are fixed to the inner sleeve fixing plate (4) via bolts (2) on the edges. A plurality of brush rings (17) are fixedly installed at the tail of the inner side of the drill rod sleeve (1). The center of the brush ring (17) has a through hole, so that the drill rod (12) passes through the center of the brush ring (17). The outer sleeve fixing plate is welded to a drilling rig arranged on the side of the drill rod sleeve (1), and the drilling rig pushes the drill rod sleeve (1) to move forward and backward.

2. The dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection according to claim 1 is characterized in that: The small opening end of the rubber sleeve dust cover (15) is sleeved on the front end of the drill rod sleeve (1) and is fastened by the iron wire (10).

3. The dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection according to claim 1 is characterized in that: The tail of the drill rod sleeve (1) adopts three brush rings (17).

4. The dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection according to claim 1, characterized in that: The sleeve fixing plate (4) and the soft plastic plate (18) are both square plates with screw holes at the four corners. A thin slit is cut along the edge of the reserved circular hole in the center of the soft plastic plate (18) toward each of the four corners. The length of the slit does not exceed the outer edge of the drill pipe sleeve (1).

5. The dust and pollution prevention device for a pneumatic down-the-hole hammer for cultural relics protection according to any one of claims 1 to 4, characterized in that: The diameter of the drill rod sleeve (1) is 160 mm, and the diameter of the exhaust port is 100 mm; the diameter of the small end of the cone of the rubber dust cover is 160 mm, and the diameter of the large end of the cone is 400 mm; the thickness of the annular brush strip (16) is 5 mm, the width is 100 mm, and the length is 120 mm; the diameter of the brush ring (17) is 159 mm, the thickness is 3 mm, and a circular hole with a diameter of 35 mm is reserved in the center of the brush ring. The outer edge of the brush ring is reinforced with an iron bar; the soft plastic plate (18) is a square plastic plate with a side length of 180 mm, and a circular hole with a diameter of 45 mm is reserved in the center of the plastic plate. A 60 mm long seam is cut from the edge of the circular hole to each of the four top corners of the plastic plate.

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