CN216277885U - Cutting head of heading machine - Google Patents
Cutting head of heading machine Download PDFInfo
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- CN216277885U CN216277885U CN202122413279.4U CN202122413279U CN216277885U CN 216277885 U CN216277885 U CN 216277885U CN 202122413279 U CN202122413279 U CN 202122413279U CN 216277885 U CN216277885 U CN 216277885U
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- pick
- cutting head
- reinforcing plate
- guide plate
- seat
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Abstract
The utility model relates to the technical field of tunneling equipment, in particular to a cutting head of a tunneling machine. The heading machine cutting head comprises a cutting head body, a pick holder and picks mounted on the pick holder, wherein a guide plate is arranged on the outer surface of the cutting head body, the guide plate is spirally arranged along the axial direction of the cutting head body, a plurality of pick holders are fixedly arranged on the upper surface of the spiral guide plate, a reinforcing plate is fixedly arranged above each pick holder, the reinforcing plate is irregular hexagon, and the reinforcing plate is welded and fixed with the cutting head body and the pick holder respectively. The utility model provides a cutting head of a heading machine, wherein a plurality of pick seats and picks are arranged around the circumferential direction of the cutting head, and a guide plate is arranged below the pick seats to ensure that the pick seats are stably connected; the reinforcing plate is arranged above the pick seat, and the pick seat on the cutting head body is connected together by the guide plate and the reinforcing plate to form a whole according to the spiral arrangement of the pick seat and the guide plate, so that the strength and the shock resistance of a welding seam and the pick seat can be improved.
Description
Technical Field
The utility model relates to the technical field of tunneling equipment, in particular to a cutting head of a tunneling machine.
Background
In tunnel excavation, the rocks in the tunnel mainly comprise stroke dolomite, the part of the rocks is diabase, the average strength of surrounding rocks is 83.8MPa, and the local highest strength reaches 128 MPa. The creep XTR7/360 cantilever type tunnel boring machine is adopted for milling and excavating construction, and has the characteristics of high power, large cutting torque and the like. When high-strength hard rock is milled and excavated, the impact on a pick seat and a pick of a cutting head body of the high-strength hard rock is particularly severe; especially when cutting rocks with karst cave and interlayer and uneven hardness, the damage to the pick holder and the pick is more obvious.
Alloy composition when the pick is not up to standard, when the quality is unsatisfied to require, if the pick alloy is overly hard, will lead to toughness not enough, it is inhomogeneous when rock hardness, and the cutting speed is too fast, it is great to the pick impact, the pick during operation is because of interfering, environmental pollution or other reasons, when leading to the pick can not freely rotate in the pick box, the cutting resistance increases, the pick wearing and tearing are serious, the life-span reduces, because of impact load's frequent alternation, the fatigue damage of welding seam and pick box body has been accelerated, lead to the frequent appearance of pick box welding seam crackle until the fracture, need consume a large amount of time and repair or change, bring not influence of equidimension to the construction production.
Chinese patent No. CN201720477624.1 discloses a cutting head of a heading machine, which has a boss on the outer surface of the cutting head body, so that the pick box is fixed on the boss, but no further fixing is made to the pick box, during the use, the welding seam of the pick box still has cracks, and further the construction requirements of the whole cutting head are affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the existing cutting head of the heading machine is easy to crack and break the welding seam of the pick box, the cutting head of the heading machine is provided, the service life of the pick box of the cutting head is prolonged, and the stable operation of the heading machine is ensured.
The technical scheme adopted by the utility model for realizing the purpose is as follows: the utility model provides a heading machine cutterhead, includes cutterhead body, pick seat and installs the pick on the pick seat, the surface of cutterhead body is equipped with the guide plate, the guide plate is the heliciform setting along the axial of cutterhead body, and the fixed surface of heliciform guide plate is equipped with a plurality of pick seats, and each pick seat top all is fixed and is equipped with the reinforcing plate, the shape of reinforcing plate is irregular hexagon, the reinforcing plate respectively with cutterhead body and pick seat welded fastening.
Further, the reinforcing plate is made of Q345B grade steel plate, is fixed above the pick box through welding and is basically parallel to the guide plate.
Further, the length of reinforcing plate is 100mm, the width of reinforcing plate is 70mm, and the thickness of reinforcing plate is 20 mm.
Furthermore, the first edge of the reinforcing plate is welded and fixed with the cutting head body, and the included angle between the second edge of the reinforcing plate and the circumferential surface of the cutting head body is 30-35 degrees.
The utility model has the technical effects and advantages that: the utility model provides a cutting head of a heading machine, wherein a plurality of pick holders are arranged around the circumferential direction of the cutting head, and a guide plate is arranged below the pick holders to ensure that the pick holders are stably connected; the reinforcing plate is arranged above the pick seat, and the pick seat on the cutting head is connected together by the guide plate and the reinforcing plate according to the spiral arrangement of the pick seat and the guide plate from the aspect of reinforcing the strength of a welding seam, so that the cutting head body, the pick seat, the guide plate and the reinforcing plate are welded into an integral structure, and the strength and the shock resistance of the welding seam and the pick seat can be improved;
the reinforcing plate has the advantages that the reinforcing plate is used for protecting the steel plate, so that the tangible abrasion caused by the friction of the bottom of the pick box after the bottom of the pick box is directly contacted with rocks in the milling and digging process can be avoided, and the reinforcing plate and the pick box are welded and combined into a whole, so that the shearing resistance and the metal fatigue damage resistance of the pick box are improved, and the service life is greatly prolonged;
the reinforcing plate is in an irregular hexagon shape, the included angle between the reinforcing plate and the circumferential surface of the cutter head body is 30-35 degrees, the reinforcing plate is basically parallel to the guide plate, the length, the width and the thickness of the reinforcing plate are respectively limited in certain sizes, and the reinforcing plate adopts the structural design, so that the space at the rear part of the pick holder meets the pick dismounting requirement, the pick is convenient to replace and mount, and the protection effect on the pick holder is met;
according to the field service condition, the service life of the improved cutting head far exceeds the estimated purpose of prolonging the service life of the pick box by one time, the economic life of the cutting head of the cantilever excavator is about 3 months generally according to the rock characteristics of the tunnel, the using amount of the cutting head is about 11 according to the construction period of 32 months of the tunnel, the cost of each cutting head is about 20 ten thousand yuan, the total cost is 220 ten thousand yuan, after optimization, the overall strength of the cutting head is greatly improved, the impact resistance is greatly enhanced, the service life is prolonged by one time, namely about 6 cutting heads are consumed in the engineering construction period, the total cost is about 120 ten thousand yuan, and the cost can be saved by about 100 ten thousand yuan; in addition, due to the prolonging of the service life of the cutting head, the time and labor investment for repeatedly replacing the cutting head are reduced, and the construction progress is favorably improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the cutting head of the present invention;
FIG. 2 is a schematic view of a connection structure of a reinforcing plate and a pick box in the cutting head of the present invention;
FIG. 3 is a schematic view of the structure of the included angle between the reinforcing plate and the circumferential surface of the cutting head body according to the present invention;
FIG. 4 is a plan view of a stiffener of the present invention;
FIG. 5 is a perspective view of a reinforcing plate of the present invention;
wherein: 1-cutting pick, 2-cutting pick seat, 3-guide plate, 4-reinforcing plate, 5-cutting head body, 6-first edge of reinforcing plate, 7-second edge of reinforcing plate, included angle between second edge of alpha-reinforcing plate and circumferential surface of cutting head body, L1-length of reinforcing plate, L2-width of reinforcing plate and L3-thickness of reinforcing plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example (b):
as shown in fig. 1-5, a cutting head of a heading machine comprises a cutting head body 5, a cutting pick seat 2 and cutting picks 1 mounted on the cutting pick seat 2, a guide plate 3 is arranged on the outer surface of the cutting head body 5, the guide plate 3 is spirally arranged along the axial direction of the cutting head body 5, a plurality of cutting pick seats 2 are fixedly arranged on the upper surface of the spiral guide plate 3, a reinforcing plate 4 is fixedly arranged above each cutting pick seat 2, the reinforcing plate 4 is irregularly hexagonal, the reinforcing plate 4 is respectively welded and fixed with the cutting head body 5 and the cutting pick seat 2, the cutting head body 5, the cutting pick seat 2, the guide plate 3 and the reinforcing plate 4 are welded into an integral structure, a first edge 6 of the reinforcing plate is welded and fixed with the cutting head body 5, an included angle alpha between a second edge 7 of the reinforcing plate and the circumferential surface of the cutting head body is 30 degrees to 35 degrees, the reinforcing plate 4 is made of a Q345B-grade steel plate, and is welded and fixed above the cutting pick seat 2 and is basically parallel to the guide plate 3, the length L1 of the reinforcing plate was 100mm, the width L2 of the reinforcing plate was 70mm, and the thickness L3 of the reinforcing plate was 20 mm.
In practical application, arrange according to the spiral of pick box 2 and guide plate 3, start from strengthening the welding seam intensity, utilize guide plate 3 and reinforcing plate 4 to link together the pick box 2 on the cutterhead body 5 and form a whole, improve the intensity and the ability of shock resistance of welding seam and pick box 2 greatly, can also guarantee that the space at pick box 2 rear portion satisfies pick 1 and dismantles the demand simultaneously, only need often change the pick 1 of damage as required in the use can, and need not often change the cutterhead whole, see according to the in-situ in service behavior, cutterhead body 5 life after the improvement has far exceeded one time of the life of prediction.
While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (4)
1. The utility model provides a heading machine cutterhead, includes cutterhead body, pick seat and installs the pick on the pick seat, its characterized in that: the outer surface of the cutterhead body is provided with a guide plate, the guide plate is spirally arranged along the axial direction of the cutterhead body, a plurality of pick seats are fixedly arranged on the upper surface of the spirally shaped guide plate, a reinforcing plate is fixedly arranged above each pick seat, the reinforcing plate is in an irregular hexagon shape, and the reinforcing plate is respectively welded and fixed with the cutterhead body and the pick seats.
2. A heading machine cutter head according to claim 1, wherein: the reinforcing plate is made of Q345B grade steel plate, is fixed above the pick box by welding and is basically parallel to the guide plate.
3. A heading machine cutter head according to claim 1, wherein: the length of reinforcing plate is 100mm, and the width of reinforcing plate is 70mm, and the thickness of reinforcing plate is 20 mm.
4. A heading machine cutter head according to claim 1, wherein: the first edge of the reinforcing plate is welded and fixed with the cutting head body, and the included angle between the second edge of the reinforcing plate and the circumferential surface of the cutting head body is 30-35 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122413279.4U CN216277885U (en) | 2021-10-08 | 2021-10-08 | Cutting head of heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122413279.4U CN216277885U (en) | 2021-10-08 | 2021-10-08 | Cutting head of heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216277885U true CN216277885U (en) | 2022-04-12 |
Family
ID=81067526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122413279.4U Active CN216277885U (en) | 2021-10-08 | 2021-10-08 | Cutting head of heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216277885U (en) |
-
2021
- 2021-10-08 CN CN202122413279.4U patent/CN216277885U/en active Active
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