CN209195251U - Down-hole hammer damper - Google Patents
Down-hole hammer damper Download PDFInfo
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- CN209195251U CN209195251U CN201821902443.XU CN201821902443U CN209195251U CN 209195251 U CN209195251 U CN 209195251U CN 201821902443 U CN201821902443 U CN 201821902443U CN 209195251 U CN209195251 U CN 209195251U
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Abstract
A kind of down-hole hammer damper, the top and bottom of main body are fixedly connected with the upper end of supported flange and tool joint respectively, main body is formed by internally positioned transmission guide cylinder and positioned at external main body sleeve, the lower slide of power sub is plugged in transmission guide cylinder, and power sub in supported flange and is driven between guide cylinder by affixed stop collar limit on the outside；Spring is equipped between body barrel and transmission guide cylinder, the upper and lower ends difference elastic reaction of spring is in stop collar and main body lower flange；The inner lower of transmission guide cylinder is arranged in sealing axis body, and is fixedly connected between lower end and the lower end of transmission guide cylinder, and the top sliding for sealing axis body is plugged in axis body accommodating chamber；Tool joint accommodating chamber, power sub accommodating chamber are respectively equipped with inside the lower end of tool joint, power sub upper end.The damper can effectively mitigate vibration workpiece to the vibratory impulse power of host mast and power head part.
Description
Technical field
The utility model belongs to building and equipment for bridge construction technical field, and in particular to a kind of down-hole hammer damper.
Background technique
In down-hole hammer construction, tup provides power by the air-flow of certain pressure, realizes that high-intensity oscillation destroys rock
Stone completes pore-forming operation.But the vibration of this high intensity has serious destruction to make in down-hole hammer host and mast and power head
With.Less serious case reduces the service life of host and mast and power head, and severe one will cause host and mast and power head vulnerable area
Or the fracture of stress concentration portion point, consequence is serious, loss is huge.
Summary of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of down-hole hammer damper, the damper
Vibration workpiece can effectively be mitigated to the vibratory impulse power of host mast and power head part, can be conducive to improve host and mast
The service life of bar and power head.
To achieve the goals above, the utility model provides a kind of down-hole hammer damper, including main body, power sub,
Tool joint, supported flange and sealing axis body；
The main body includes that transmission guide cylinder and main body sleeve, the lower end outside fixing assembling for being driven guide cylinder have master
Body lower flange offers and axially receives chamber A with being driven at the axle center of guide cylinder perforation, and the chamber A that axially receives is by top
Major diameter section and the path section of lower part composition, and the first limited step is formed in the junction of major diameter section and path section；Main body sleeve
Coaxial heart is set in the outside of transmission guide cylinder, and the lower end of main body sleeve is securely fitted in the upper end of main body lower flange；
The upper end of main body sleeve is higher than the upper end of transmission guide cylinder, and fixing assembling has method in main body outside the upper end of main body sleeve
It is blue；
The power sub is successively to have power sub linkage section, middle part guide section and lower part guide section from top to bottom,
Power sub linkage section, middle part guide section and the coaxial heart setting of lower part guide section, and outer diameter successively becomes smaller, power sub connection
The junction of section and middle part guide section forms the second limited step, the junction formation third of middle part guide section and lower part guide section
Limited step；Lower part guide section, middle part guide section slide respectively is plugged in path section, in major diameter section, and lower part guide section is outer
Disc, middle part guide section outer surface respectively with the lateral wall of path section, major diameter section lateral wall between be slidably matched, major diameter section
Lateral wall and middle part guide section outer surface between radially limit cooperate, the second limited step and transmission guide cylinder upper end
It matches and lower limit is carried out to power sub, and when the second limited step is in contact with the upper end edge of transmission guide cylinder, the
Between three limited steps and the first limited step, between having between the lower end of lower part guide section and the lower end for being driven guide cylinder
Gap；Fixing sleeve is equipped with stop collar outside power sub linkage section lower end, and the periphery of stop collar is located at the inside of main body sleeve；It is dynamic
It is offered to perforation at the axle center of power connector and axially receives chamber B, the chamber B that axially receives is accommodated by superposed power sub
Chamber and positioned at lower part axis body accommodating chamber form；
The supported flange is set in the outside of power sub linkage section, and is located at the top of stop collar, and connect with power
Cooperation is slidingly sealed between the periphery of head linkage section；It is fixedly connected between supported flange and main body upper flange；
Spring, the top and bottom of spring are arranged in annular accommodating chamber between main body sleeve and transmission guide cylinder
Elastic reaction is distinguished in stop collar and main body lower flange, and by stop collar elastic compression in the lower end of supported flange；
Venting cavity is penetratingly provided at the axle center of the sealing axis body, the coaxial heart setting of sealing axis body is oriented in transmission
The inner lower of cylinder seals and is fixedly connected between the lower end of axis body and the lower end of transmission guide cylinder, seals the top of axis body
It is plugged in axis body accommodating chamber, and seals and be slidingly sealed cooperation between the periphery of axis body and the inner headed face of lower part guide section；
Tool joint flange, tool joint flange and main body lower flange are fixedly connected on the outside of the upper end of the tool joint
It is fixedly connected, is offered to perforation at the axle center of tool joint and axially receive chamber C, the chamber C that axially receives is by superposed
It is connected to chamber and the tool joint accommodating chamber positioned at lower part forms.
In the technical scheme, it is slidably matched between power sub and the transmission guide cylinder of main body, and is led by transmission
Lower limit is carried out to power sub to the upper end of cylinder, upper limit is carried out to power sub by supported flange, is mentioned by spring
For resilient support, and then it can select suitable spring rate that can effectively mitigate even isolation vibration work during gas transmission
Vibratory impulse power of the component to host mast and power head part；The axis body accommodating chamber of sealing axis body tool joint, which is slidingly sealed, matches
It closes, the delivery air in vibration processes, which can be effectively ensured, to be revealed, the utilization efficiency that can be improved；The middle part of tool joint is oriented to
Section and lower part guide section are stepwise inserted into the intracorporal major diameter section of transmission guide cylinder and path section, and middle part guide section and big
Between diameter section radially limit cooperation, ensure that slide axially while, radial rotating is defined, so as to further improve
Sealing axis body matches the air-tightness at position with tool joint, also ensures that the continuous sealing gas transmission of connected air delivering pipeline is made
Industry.
Further, in order to improve the effect of limit cooperation, outside the cross section of the major diameter section lateral wall and middle part guide section
The cross section on surface is positive six face shapes.
Further, in order to further increase damping performance, the supported flange and main body upper flange, which pass through, is arranged in compression
First connection of flange upper bolt hole and the bolt hole on main body upper flange is bolted, and the first connection bolt is in supported flange
Top is also arranged with off-load sleeve, and off-load sleeve is made of elastic flexible material.
Further, in order to further increase damping performance, the tool joint flange is fixedly connected logical with main body lower flange
Cross be arranged in tool joint flange upper bolt hole and the bolt hole on main body lower flange second connection be bolted, and second connect
Connecting bolt is also arranged with off-load sleeve on main body lower flange top, and off-load sleeve is made of elastic flexible material.
Further, the air pressure in lubricating oil and steady main body is filled for convenience, is assembled on the stack shell of the main body sleeve
There are at least one lubricating cup and at least one breather plug.
Further, in order to further increase damping effect, between the upper end and stop collar of spring, the lower end of spring and main body
Vibration absorption unit, the vibration absorption unit steel gasket ring and polyurethane gasket ring composition are arranged between lower flange.
Further, it in order to improve bonding strength, is connected between the tool joint flange and the lateral wall of tool joint
Multiple stiffener plates.
Further, it in order to further increase air-tightness, is assembled between tool joint flange and the joint face of main body lower flange
There is O-ring seal.
Further, it in order to further increase air-tightness, is equipped on the periphery of lower part guide section and path section lateral wall
The guide ring being slidably matched；The sealing ring with sealing axis body periphery sealing cooperation is equipped on the inner headed face of lower part guide section.
Further, enter the inside of main body, institute by the gap between supported flange and tool joint in order to avoid dust
The upper end fixing assembling for stating supported flange inner ring surface has the dust ring being slidably matched between power sub linkage section periphery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 be in Fig. 1 A-A to cross-sectional view；
Fig. 3 is the assembling schematic diagram of main body and sealing axis body in the utility model；
Fig. 4 is the structural schematic diagram of tool joint in the utility model；
Fig. 5 is the decomposition texture schematic diagram of the utility model；
Fig. 6 is the assembling schematic diagram of the utility model in use.
In figure: 1, tool joint, 2, tool joint flange, 3, three-dimensional lower flange, 4, steel gasket ring, 5, polyurethane gasket ring, 6,
Seal axis body, 7, transmission guide cylinder, 8, lubricating cup, 9, main body outer cylinder, 10, main body upper flange, 11, stop collar, 12, compression method
Orchid, 13, power sub, 14, dust ring, 15, main body, 16, off-load sleeve, the 17, first connection bolt, 18, breather plug, 19, bullet
Spring, 20, sealing ring, 21, guide ring, 22, O-ring seal, 23, stiffener plate, 24, major diameter section, 25, path section, the 26, first limit
Position step, 27, power sub linkage section, 28, middle part guide section, 29, lower part guide section, 30, power sub accommodating chamber, 31, axis
Body accommodating chamber, 32, venting cavity, 33, tool joint accommodating chamber, 34, axially receive chamber A, the 35, second limited step, 36, third limit
Position step, 37, axially receive chamber B, 38, axially receive chamber C, 39, connection chamber, the 40, second connection bolt, 41, drilling rod, 42, dynamic
Power head.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figures 1 to 5, a kind of down-hole hammer damper, including main body 15, power sub 13, tool joint 1, pressure
Tight flange 12 and sealing axis body 6；
The main body 15 includes transmission guide cylinder 7 and main body sleeve 9, the fixed dress of the lower end outside of transmission guide cylinder 7
Equipped with main body lower flange 3, offers with being penetrated through at the axle center of transmission guide cylinder 7 and axially receive chamber A34, it is described to axially receive chamber
A34 is made of the major diameter section 24 on top and the path section 25 of lower part, and forms the in the junction of major diameter section 24 and path section 25
One limited step 26；The coaxial heart of main body sleeve 9 is set in the outside of transmission guide cylinder 7, and the lower end of main body sleeve 9 is fixed
It is assemblied in the upper end of main body lower flange 3；The upper end of main body sleeve 9 is higher than the upper end of transmission guide cylinder 7, and main body sleeve 9
Fixing assembling has main body upper flange 10 outside upper end；
The power sub 13 is successively to have power sub linkage section 27, middle part guide section 28 and lower guide from top to bottom
To section 29, power sub linkage section 27, middle part guide section 28 and the setting of the coaxial heart of lower part guide section 29, and outer diameter successively becomes
Small, the junction of power sub linkage section 27 and middle part guide section 28 forms the second limited step 35, and middle part guide section 28 is under
The junction of portion's guide section 29 forms third limited step 36；Lower part guide section 29, middle part guide section 28 slide be plugged in respectively
In path section 25, major diameter section 24, and the outer surface of the periphery of lower part guide section 29, middle part guide section 28 respectively with path section 25
Lateral wall, major diameter section 24 lateral wall between be slidably matched, the outer surface of the lateral wall of major diameter section 24 and middle part guide section 28
Between radially limit cooperation, the second limited step 35 matches and carries out down to power sub 13 with the upper end for being driven guide cylinder 7
Limit, and when the second limited step 35 is in contact with the upper end edge of transmission guide cylinder 7, third limited step 36 and the first limit
There is gap between the step 26 of position, between the lower end of lower part guide section 29 and the lower end for being driven guide cylinder 7；Power head connection
Fixing sleeve is equipped with stop collar 11 outside 27 lower ends of section, and the periphery of stop collar 11 is located at the inside of main body sleeve 9；Power sub 13
Axle center at offer and axially receive chamber B37 with penetrating through, the chamber B37 that axially receives is by superposed power sub accommodating chamber
30 and positioned at lower part axis body accommodating chamber 31 form；
The supported flange 12 is set in the outside of power sub linkage section 27, and is located at the top of stop collar 11, and with
Cooperation is slidingly sealed between the periphery of power sub linkage section 27；It is fixed between supported flange 12 and main body upper flange 10 to connect
It connects；
Spring 19, the upper end of spring 19 are arranged in annular accommodating chamber between main body sleeve 9 and transmission guide cylinder 7
With lower end difference elastic reaction in stop collar 11 and main body lower flange 3, and by 11 elastic compression of stop collar in supported flange 12
Lower end；
Venting cavity 32 is penetratingly provided at the axle center of the sealing axis body 6, the sealing coaxial heart of axis body 6 setting is being driven
The inner lower of guide cylinder 7 is sealed and is fixedly connected between the lower end of axis body 6 and the lower end of transmission guide cylinder 7, specific close
It seals on the outside of the upper end of axis body 6 and is fixedly connected with connecting flange, and the bolt by passing through connecting flange and transmission guide cylinder 7
The top of lower end connection, sealing axis body 6 is plugged in axis body accommodating chamber 31, and seals the periphery and lower part guide section of axis body 6
Cooperation is slidingly sealed between 29 inner headed face；
Tool joint flange 2 is fixedly connected on the outside of the upper end of the tool joint 1, under tool joint flange 2 and main body
Flange 3 is fixedly connected, and compression fit between the upper end of tool joint 1 and the lower end for sealing axis body 6；The axle center of tool joint 1
It offers to place's perforation and axially receives chamber C38, the chamber C38 that axially receives is by superposed connection chamber 39 and positioned at lower part
Tool joint accommodating chamber 33 forms.
In order to improve the effect of limit cooperation, 28 outer surface of cross section and middle part guide section of 24 lateral wall of major diameter section
Cross section be positive six face shapes.
In order to further increase damping performance, the supported flange 12 is with main body upper flange 10 by being arranged in supported flange
First connection bolt 17 of 12 upper bolt holes and the bolt hole on main body upper flange 10 connects, and the first connection bolt 17 is compressing
12 top of flange is also arranged with off-load sleeve 16, and off-load sleeve 16 is made of elastic flexible material.The tool joint flange 2 with
Main body lower flange 3 is fixedly connected with of the bolt hole by being arranged on 2 upper bolt hole of tool joint flange and main body lower flange 3
Two connection bolts 40 connect, and the second connection bolt 40 is also arranged with off-load sleeve 16, off-load sleeve on 3 top of main body lower flange
16 are made of elastic flexible material.
In order to facilitate the air pressure in filling lubricating oil and steady main body, it is equipped at least on the stack shell of the main body sleeve 9
One lubricating cup 8 and at least one breather plug 18.
In order to further increase damping effect, between the upper end and stop collar 11 of spring 19, the lower end of spring 19 and main body
Vibration absorption unit is arranged between lower flange 3, the vibration absorption unit steel gasket ring 4 and polyurethane gasket ring 5 form.
In order to improve bonding strength, multiple add is connected between the tool joint flange 2 and the lateral wall of tool joint 1
Strengthening tendons plate 23.
In order to further increase air-tightness, it is equipped between tool joint flange 2 and the joint face of main body lower flange 3 O-shaped
Sealing ring 22.
In order to further increase air-tightness, it is equipped on the periphery of lower part guide section 29 and is slided with 25 lateral wall of path section
The guide ring 21 of cooperation；The sealing ring with sealing 6 periphery of axis body sealing cooperation is equipped on the inner headed face of lower part guide section 29
20。
In order to avoid dust enters by the gap between supported flange and tool joint the inside of main body, the compression method
The upper end fixing assembling of blue 12 inner ring surfaces has the dust ring 14 being slidably matched between 27 periphery of power sub linkage section.
In use, being plugged in power sub accommodating chamber 30 as shown in fig. 6, the power head 42 of mainmast is fixed, will bore
The fixation of bar 41 is plugged in tool joint accommodating chamber 33.It is sliding between power sub 13 and the transmission guide cylinder 7 of main body 15
Dynamic cooperation, and the lower limit during being moved axially by the upper end of transmission guide cylinder 7 to power sub 13, pass through pressure
Upper limit during tightly the cooperation between flange 12 and stop collar 11 moves axially power sub 13, passes through spring 19
Resilient support is provided, and then can select suitable spring rate that can effectively mitigate even isolation vibration work during gas transmission
Make component to the vibratory impulse power of host mast and power head part；Seal the axis body accommodating chamber 31 of axis body 6 and tool joint 13
It is slidingly sealed cooperation, the delivery air in vibration processes, which can be effectively ensured, to be revealed, the utilization efficiency that can be improved；Tool joint
13 middle part guide section 28 and lower part guide section 29 is stepwise inserted into major diameter section 24 and path section in transmission guide cylinder 7
In 25, and radially limit cooperation between middle part guide section 28 and major diameter section 24, it ensure that tool joint 13 is same in axial sliding
When, it defines its radial rotating, matches the airtight of position so as to further improve sealing axis body 6 with tool joint 13
Property, also ensure the continuous sealing gas transmission operation of connected air delivering pipeline.
Claims (10)
1. a kind of down-hole hammer damper, including main body (15), power sub (13) and tool joint (1), which is characterized in that also
Including supported flange (12) and sealing axis body (6)；
The main body (15) includes transmission guide cylinder (7) and main body sleeve (9), and the lower end outside of transmission guide cylinder (7) is solid
Surely it is equipped with main body lower flange (3), offers with being penetrated through at the axle center of transmission guide cylinder (7) and axially receive chamber A(34), it is described
Axially receive chamber A(34) it is made of the major diameter section (24) on top and the path section (25) of lower part, and in major diameter section (24) and path
The junction of section (25) forms the first limited step (26)；The coaxial heart of main body sleeve (9) is set in transmission guide cylinder (7)
Outside, and the lower end of main body sleeve (9) is securely fitted in the upper end of main body lower flange (3)；The upper end of main body sleeve (9), which is higher than, to be passed
The upper end of action-oriented cylinder (7), and fixing assembling has main body upper flange (10) outside the upper end of main body sleeve (9)；
The power sub (13) is successively to have power sub linkage section (27), middle part guide section (28) and lower part from top to bottom
Guide section (29), the coaxial heart setting of power sub linkage section (27), middle part guide section (28) and lower part guide section (29), and it is outer
Diameter successively becomes smaller, and the junction of power sub linkage section (27) and middle part guide section (28) forms the second limited step (35), in
The junction of portion's guide section (28) and lower part guide section (29) forms third limited step (36)；Lower part guide section (29), middle part
Guide section (28) slides respectively is plugged in path section (25), in major diameter section (24), and the periphery of lower part guide section (29), middle part
The outer surface of guide section (28) respectively with the lateral wall of path section (25), major diameter section (24) lateral wall between be slidably matched, greatly
Radially limit cooperation, the second limited step (35) and biography between the lateral wall of diameter section (24) and the outer surface of middle part guide section (28)
The upper end of action-oriented cylinder (7), which is matched, carries out lower limit to power sub (13), and when the second limited step (35) and transmission
When the upper end edge of guide cylinder (7) is in contact, between third limited step (36) and the first limited step (26), the guide section of lower part
(29) there is gap between the lower end of lower end and transmission guide cylinder (7)；It is solid outside power sub linkage section (27) lower end
Surely restraining position ring block (11) are set with, the periphery of stop collar (11) is located at the inside of main body sleeve (9)；The axle center of power sub (13)
Offer to place's perforation and axially receive chamber B(37), described to axially receive chamber B(37) by superposed power sub accommodating chamber
(30) it is formed with the axis body accommodating chamber (31) positioned at lower part；
The supported flange (12) is set in the outside of power sub linkage section (27), and is located at the top of stop collar (11), and
Cooperation is slidingly sealed between the periphery of power sub linkage section (27)；Between supported flange (12) and main body upper flange (10)
It is fixedly connected；
It is arranged with spring (19) in annular accommodating chamber between main body sleeve (9) and transmission guide cylinder (7), spring (19)
Top and bottom difference elastic reaction is being pressed in stop collar (11) and main body lower flange (3), and by stop collar (11) elastic compression
The lower end of tight flange (12)；
It is penetratingly provided with venting cavity (32) at the axle center of sealing axis body (6), the coaxial heart setting of sealing axis body (6) is passing
The inner lower of action-oriented cylinder (7) is sealed and is fixedly connected between the lower end of axis body (6) and the lower end of transmission guide cylinder (7),
The top of sealing axis body (6) is plugged in axis body accommodating chamber (31), and seals periphery and lower part guide section (29) of axis body (6)
Inner headed face between be slidingly sealed cooperation；
It is fixedly connected with tool joint flange (2) on the outside of the upper end of the tool joint (1), tool joint flange (2) and main body
Lower flange (3) is fixedly connected, and is offered to perforation at the axle center of tool joint (1) and is axially received chamber C(38), it is described to axially receive
Chamber C(38) it is made of superposed connection chamber (39) and the tool joint accommodating chamber (33) positioned at lower part.
2. a kind of down-hole hammer damper according to claim 1, which is characterized in that major diameter section (24) lateral wall
The cross section of cross section and middle part guide section (28) outer surface is positive six face shapes.
3. a kind of down-hole hammer damper according to claim 1 or 2, which is characterized in that the supported flange (12) with
Main body upper flange (10) passes through the first of the bolt hole being arranged on supported flange (12) upper bolt hole and main body upper flange (10)
Bolt (17) connection is connected, and the first connection bolt (17) is also arranged with off-load sleeve (16) on supported flange (12) top, unloads
Lotus sleeve (16) is made of elastic flexible material.
4. a kind of down-hole hammer damper according to claim 3, which is characterized in that the tool joint flange (2) with
Main body lower flange (3) is fixedly connected with the bolt by being arranged on tool joint flange (2) upper bolt hole and main body lower flange (3)
Second connection bolt (40) connection in hole, and the second connection bolt (40) is also arranged with unloading sleeve on main body lower flange (3) top
Cylinder (16), off-load sleeve (16) are made of elastic flexible material.
5. a kind of down-hole hammer damper according to claim 4, which is characterized in that the stack shell of the main body sleeve (9)
On be equipped at least one lubricating cup (8) and at least one breather plug (18).
6. a kind of down-hole hammer damper according to claim 5, which is characterized in that the upper end of spring (19) and stop collar
(11) between, vibration absorption unit, the vibration absorption unit steel gasket ring are arranged between the lower end of spring (19) and main body lower flange (3)
(4) it is formed with polyurethane gasket ring (5).
7. a kind of down-hole hammer damper according to claim 6, which is characterized in that the tool joint flange (2) and
Multiple stiffener plates (23) are connected between the lateral wall of tool joint (1).
8. a kind of down-hole hammer damper according to claim 7, which is characterized in that tool joint flange (2) and main body
O-ring seal (22) are equipped between the joint face of lower flange (3).
9. a kind of down-hole hammer damper according to claim 8, which is characterized in that the periphery of lower part guide section (29)
On be equipped with the guide ring (21) being slidably matched with path section (25) lateral wall；It is equipped on the inner headed face of lower part guide section (29)
With the sealing ring (20) of sealing axis body (6) periphery sealing cooperation.
10. a kind of down-hole hammer damper according to claim 9, which is characterized in that supported flange (12) inner ring
The upper end fixing assembling in face has the dust ring (14) being slidably matched between power sub linkage section (27) periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821902443.XU CN209195251U (en) | 2018-11-19 | 2018-11-19 | Down-hole hammer damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821902443.XU CN209195251U (en) | 2018-11-19 | 2018-11-19 | Down-hole hammer damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209195251U true CN209195251U (en) | 2019-08-02 |
Family
ID=67424733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821902443.XU Active CN209195251U (en) | 2018-11-19 | 2018-11-19 | Down-hole hammer damper |
Country Status (1)
| Country | Link |
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| CN (1) | CN209195251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734302A (en) * | 2020-05-27 | 2020-10-02 | 徐州雷曼机械科技有限公司 | Vibration reduction air distributor for improving down-the-hole hammer of rotary drilling rig |
-
2018
- 2018-11-19 CN CN201821902443.XU patent/CN209195251U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734302A (en) * | 2020-05-27 | 2020-10-02 | 徐州雷曼机械科技有限公司 | Vibration reduction air distributor for improving down-the-hole hammer of rotary drilling rig |
| CN111734302B (en) * | 2020-05-27 | 2024-05-14 | 徐州雷曼机械科技有限公司 | Vibration reduction wind distributor for reforming down-the-hole hammer of rotary drilling rig |
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