CN215408444U - Utilize waste gas to strengthen organism refrigerated pneumatic rock drill - Google Patents
Utilize waste gas to strengthen organism refrigerated pneumatic rock drill Download PDFInfo
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- CN215408444U CN215408444U CN202120658140.3U CN202120658140U CN215408444U CN 215408444 U CN215408444 U CN 215408444U CN 202120658140 U CN202120658140 U CN 202120658140U CN 215408444 U CN215408444 U CN 215408444U
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Abstract
The utility model belongs to rock drilling machinery, in particular to a pneumatic rock drill for strengthening the cooling of a machine body by utilizing waste gas. Has the advantages that: the utility model guides a part of waste gas in the cylinder body out, and the waste gas is discharged through the pore channel of the convex ring of the annular groove formed by the guide sleeve, so that the temperature is reduced by utilizing the expansion and heat absorption of the gas, the machine head is cooled, and the service life of each part is prolonged.
Description
Technical Field
The utility model relates to the field of rock drilling machinery, in particular to an improved reinforced cooling structure of a pneumatic rock drill.
Background
Pneumatic rock drills, such as types YT30, YT29, when working, because the piston does high-frequency reciprocating motion and compressed air expands to do work, during the motion, because friction between parts and heat generated by compressed air increase the temperature of the parts, under the high-temperature condition, the wear degree of the parts can be accelerated, the service life of each part is reduced, and the working efficiency is reduced.
When the rock drill works, a piston reciprocates in a cylinder body at a high frequency, although the temperature can be reduced by oil mist lubrication, overlarge heat is still generated, a cooling air hole is processed on the cylinder body close to the end of a handle body in the conventional cooling structure, the cooling air hole and a forced slag discharging air hole are on the same circumference, two cooling holes are processed on the inner surface of the cylinder body vertical to the cylinder body, the other end of the cylinder body is also the same, the two cooling holes are communicated with each other in pairs, and the cooling air hole at the end of the handle body is blocked and welded. When the piston rotates, a large amount of waste gas enters the silencing cover through the exhaust hole due to compressed air and is exhausted into the atmosphere, the air flow at the upper part of the machine head is accelerated, the machine head part is cooled, part of the waste gas enters the rear cavity of the cylinder body through the small hole, and the heat generated by the valve sleeve and the spiral pair is cooled; when the piston impacts, a small part of waste gas enters the guide sleeve cooling air hole from the small hole and then enters the machine head cooling air hole to enter the machine head to reduce the temperature for cooling, but the cooling device is not enough to cool the heat caused by the friction between the rotating sleeves due to the fact that the air in the front cavity of the cylinder body is compressed and revolved due to impact of the piston, and the machine head is still hot after long-time work.
SUMMERY OF THE UTILITY MODEL
The utility model aims to further enhance the cooling function of a rock drill, and provides a pneumatic rock drill for enhancing the cooling of a rock drill body by utilizing waste gas, so that the effect of prolonging the service life of each part is achieved.
The technical scheme of the utility model is as follows: a piston skirt is in threaded connection with a spiral nut, the spiral nut is in splined connection with a spiral rod, a piston rod at the other end of a piston is in threaded connection with the spline nut, the spline nut is in splined connection with a rotating sleeve, a new cooling air hole is machined below a cylinder body cooling air hole, two vertical inner surface holes are drilled in the inner surface of the cylinder body, the new cooling air hole and the two vertical inner surface holes form an air channel, one of the two vertical inner surface holes is located in the rear cavity area of the cylinder body, the other vertical inner surface hole is located in the area of a guide sleeve annular groove, and a convex ring of the guide sleeve forming the annular groove is provided with a waste gas exhaust hole.
Further, a small hole vertical to the inner wall of the cylinder body is processed on the inner wall of the cylinder body where the strong slag discharge air hole is located.
The depth of the new cooling air hole is 78mm, and the diameter of the new cooling air hole is phi 9 mm.
The diameter of the vertical inner surface hole is phi 8mm, and the pitch of the holes is 64 mm.
The number of the waste gas discharge holes is 5, the diameters of the waste gas discharge holes are all phi 4mm, and the 5 holes are all arranged on the same circumference with the circumference radius of phi 43 mm.
The utility model has the beneficial effects that: the utility model guides a part of waste gas in the cylinder body out, the waste gas is discharged through a pore passage of a convex ring of the annular groove formed by the guide sleeve, the gas is expanded to absorb heat, the temperature is reduced, the machine head is cooled, and meanwhile, a small hole vertical to the inner wall of the cylinder body is processed on the inner wall of the cylinder body where the slag gas hole is strongly discharged, so that the waste gas continuously enters the interior of the machine head in the high-frequency reciprocating motion of the piston, the parts in the machine head are cooled, the service life of each part is prolonged, and the working efficiency is improved.
Drawings
FIG. 1 is a sectional view of a modification of the present invention;
FIG. 2 is an axial front view of the cylinder block of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a K-K rotational cross-sectional view of FIG. 2;
FIG. 5 is an axial front view of the guide sleeve of the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
in the figure: 1-piston skirt, 2-spiral nut, 3-spiral rod, 4-spline nut, 5-rotating sleeve, 6-new cooling air hole, 7-vertical inner surface hole, 8-cylinder body back cavity, 9-guide ring annular groove, 10-waste gas discharge hole and 11-small hole.
Detailed Description
A piston skirt 1 is in threaded connection with a screw nut 2, the screw nut 2 is in splined connection with a screw rod 3, a piston rod at the other end of a piston is in threaded connection with a spline nut 4, and the spline nut 4 is in splined connection with a rotating sleeve 5. The utility model further improves the cooling structure, a new cooling air hole 6 is processed below the original cooling air hole of the cylinder body, two vertical inner surface holes 7 are drilled on the inner surface of the cylinder body, and the new cooling air hole 6 and the two vertical inner surface holes 7 form a gas channel. Two vertical inner surface holes 7 are arranged one in the area of a cylinder body rear cavity 8 and the other in the area of a guide sleeve annular groove 9, and a convex ring of the guide sleeve forming the annular groove is provided with an exhaust gas discharge hole 10. And a part of waste gas is discharged along the vertical inner surface hole 7, the new cooling air hole 6, the guide ring annular groove 9 and the waste gas discharge hole 10, and the waste gas entering the air expands to absorb heat, so that the temperature is reduced, and the machine head is cooled.
Meanwhile, small holes 11 vertical to the inner wall of the cylinder body are processed in the inner wall of the cylinder body, so that waste gas of the cylinder body continuously enters the machine head in the high-frequency reciprocating motion of the piston, parts in the machine head are cooled, the service life of each part is prolonged, and the working efficiency is improved.
The YT30G rock drill improves the size of the point that the depth of the new cooling air hole 6 is 78mm, and the diameter is phi 9 mm. The diameter of the hole 7 vertical to the inner surface is phi 8mm, the center distance of the holes is 64mm, and the distance from the connecting surface of the cylinder body and the guide sleeve to the nearest hole center is 8 mm. The exhaust gas discharge holes 10 are 5 in number, the diameter of each exhaust gas discharge hole is phi 4mm, and the 5 exhaust gas discharge holes are arranged on the same circumference with the radius of phi 43 mm.
The improved cooling structure can be applied to various types of air-leg rock drills and handheld rock drills, and solves the problems that the rock drills generate heat and the service lives of parts are shortened under the working condition that the rotary energy of piston impact cannot be fully released in the operation process by cooling the rock drills by using waste gas.
Claims (5)
1. The utility model provides an utilize waste gas to strengthen organism refrigerated pneumatic rock drill, piston skirt (1) and the female (2) threaded connection of spiral, spiral (2) and spiral stick (3) splined connection, the female (4) threaded connection of piston other end piston rod and spline, the female (4) and the cover (5) splined connection of rotation of spline, characterized by: a new cooling air hole (6) is processed below the cooling air hole of the cylinder body, two vertical inner surface holes (7) are drilled on the inner surface of the cylinder body, the new cooling air hole (6) and the two vertical inner surface holes (7) form an air channel, one of the two vertical inner surface holes (7) is arranged in the area of a rear cavity (8) of the cylinder body, the other vertical inner surface hole is arranged in the area of a guide sleeve annular groove (9), and a convex ring of the guide sleeve annular groove is provided with a waste gas discharge hole (10).
2. A pneumatic rock drill for enhanced body cooling using exhaust air as defined in claim 1 wherein: and small holes (11) vertical to the inner wall of the cylinder body are processed on the inner wall of the cylinder body where the strong slag discharge air holes are located.
3. A pneumatic rock drill for enhanced body cooling using exhaust air as defined in claim 1 wherein: the depth of the new cooling air hole (6) is 78mm, and the diameter is phi 9 mm.
4. A pneumatic rock drill for enhanced body cooling using exhaust air as defined in claim 1 wherein: the diameter of the vertical inner surface hole (7) is phi 8mm, and the hole pitch is 64 mm.
5. A pneumatic rock drill for enhanced body cooling using exhaust air as defined in claim 1 wherein: the number of the waste gas discharge holes (10) is 5, the diameters of the waste gas discharge holes are phi 4mm, and the 5 holes are arranged on the same circumference with the circumference radius of phi 43 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120658140.3U CN215408444U (en) | 2021-03-31 | 2021-03-31 | Utilize waste gas to strengthen organism refrigerated pneumatic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120658140.3U CN215408444U (en) | 2021-03-31 | 2021-03-31 | Utilize waste gas to strengthen organism refrigerated pneumatic rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215408444U true CN215408444U (en) | 2022-01-04 |
Family
ID=79669975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120658140.3U Active CN215408444U (en) | 2021-03-31 | 2021-03-31 | Utilize waste gas to strengthen organism refrigerated pneumatic rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215408444U (en) |
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2021
- 2021-03-31 CN CN202120658140.3U patent/CN215408444U/en active Active
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