Quick-release hob cutter ring structure for tunneling hard rock

Abstract

The utility model relates to a quick-release hob cutter ring structure for tunneling hard rock, which is formed by splicing a plurality of cutter ring splicing single bodies, each cutter ring splicing single body is arc-shaped, a through sliding groove is arranged in each cutter ring splicing single body along the arc shape, and a cutter ring fixing block is arranged in each sliding groove in a sliding manner. The quick-release hobbing cutter ring has the advantages that the quick-release hobbing cutter ring is composed of the three cutter ring assembly single bodies, the cutter ring assembly single bodies can be flexibly replaced according to requirements, when blades are abraded or need to be replaced, only the specific cutter ring assembly single bodies need to be replaced, the whole cutter ring does not need to be replaced, and time and cost are greatly saved; the cutter ring assembly single bodies are provided with the sliding grooves, the cutter ring fixing blocks slide to the ends in the sliding grooves to splice the adjacent cutter ring assembly single bodies, and the quick disassembly type hob cutter ring is easy and convenient to replace and can quickly meet different machining requirements.

Description

Technical Field

[0001] The utility model relates to the field of shield machines, and in particular comprises a quick-detachable roller cutter ring structure for excavating hard rocks. Background Art

[0002] During the process of using the roller cutter to excavate hard rock, since the hard rock is hard and has high compressive strength, the cutter ring will be subjected to greater impact and friction, and the blade will be easily worn and damaged. Therefore, it is necessary to replace it with a stronger and more wear-resistant blade for processing. This causes the maintenance frequency of the roller cutter to increase exponentially when the shield is excavating hard rock.

[0003] In the prior art, the cutter ring of the shield machine has the following disadvantages: 1) The cutter ring of the shield machine generally adopts an integral structure. When replacing the cutter ring, it is often necessary to dismantle the entire cutter to replace the cutter ring. However, during the use of the cutter, it is inevitable that the cutter body and the cutter ring will be deformed, resulting in difficulty in disassembling the cutter ring; 2) At the same time, there is currently no heat dissipation measure for the cutter ring, which causes the temperature to rise and the cutter ring strength to decrease, resulting in reduced excavation efficiency. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a quick-detachable roller cutter ring structure for excavating hard rock.

[0005] The quick-detachable roller cutter ring structure for excavating hard rock is formed by splicing several cutter ring assembly units, the cutter ring assembly units are arc-shaped, a through sliding groove is arranged along the arc inside the cutter ring assembly units, and a cutter ring fixing block is slidably arranged in the sliding groove;

[0006] Both ends of the knife ring assembly unit are provided with fixed block limit bolt holes, and the fixed block limit bolt holes pass through the sliding groove. When the knife ring assembly units are assembled into a whole, the two sides of each knife ring fixed block are respectively inserted into the sliding grooves of the two adjacent knife ring assembly units, and the limit bolts are installed in the fixed block limit bolt holes, and the knife ring fixed block is located between the limit bolts of the two adjacent knife ring assembly units.

[0007] Preferably, after the knife ring assembly units are assembled into a whole, the knife ring fixing block is located between the limiting bolts of two adjacent knife ring assembly units, and the length of the knife ring fixing block is less than the length of the sliding groove between the two limiting bolts.

[0008] Preferably, a plurality of heat dissipation holes are provided on the surface of the knife ring assembly unit along the sliding groove, and the heat dissipation holes and the sliding groove are connected.

[0009] Preferably, a plurality of alloy balls are inlaid on the outer side of the knife ring assembly unit, and the rigidity of the alloy balls is greater than the rigidity of the knife ring assembly unit.

[0010] Preferably, the knife ring structure is formed by splicing three knife ring assembly units, and the arc center angle corresponding to each knife ring assembly unit is 120°.

[0011] The beneficial effects of the utility model are:

[0012] 1) The quick-release hob cutter ring consists of three cutter ring assembly units, which can be flexibly replaced as needed. When the blade is worn or needs to be replaced, only the specific cutter ring assembly unit needs to be replaced, without replacing the entire cutter ring, which greatly saves time and cost.

[0013] 2) The cutter ring assembly unit is provided with a sliding groove, and the adjacent cutter ring assembly units are spliced ​​together by sliding the cutter ring fixing block in the sliding groove to the end. The quick-detachable hob cutter ring is easy to replace and can quickly adapt to different processing requirements, reducing downtime and adjustment time and improving production efficiency.

[0014] 3) The sliding groove is connected with a heat dissipation hole to facilitate the heat dissipation of the hob cutter ring and reduce the influence of temperature on the strength of the hob cutter ring.

[0015] 4) The cutter ring is inlaid with high-strength alloy, which increases the destructiveness to hard rock and speeds up the excavation speed. At the same time, the service life of the cutter ring is relatively long. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural diagram of the hob cutter ring;

[0017] Figure 2 This is a disassembled diagram of the hob cutter ring;

[0018] Figure 3 This is a top view of the hob cutter ring.

[0019] In the figure: alloy ball 1, knife ring assembly unit 2, knife ring fixing block 3, fixing block limiting bolt hole 4. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0021] As an example, Figures 1 to 3As shown, this quick-detachable roller cutter ring structure for excavating hard rock is formed by splicing three cutter ring assembly monomers 2, the cutter ring assembly monomers 2 are arc-shaped, and the arc center angle corresponding to each cutter ring assembly monomer 2 is 120°. Several alloy balls 1 are inlaid on the outside of the cutter ring assembly monomer 2, and the rigidity of the alloy balls 1 is much greater than that of the cutter ring assembly monomer 2, which increases the destructive force of the cutter ring on the hard rock and increases the excavation efficiency.

[0022] The knife ring assembly unit 2 is provided with a through sliding groove along the arc, and a knife ring fixing block 3 is slidably provided in the sliding groove; a plurality of heat dissipation holes are provided along the sliding groove on the surface of the knife ring assembly unit 2, and the heat dissipation holes and the sliding groove are connected. On the premise of ensuring the use strength requirements of the hob cutter ring, the steel material is saved, and at the same time, it is beneficial to the heat dissipation of the shield cutter ring, and can also be used for auxiliary installation holes, and the tool is inserted into the sliding groove to help slide the knife ring fixing block 3.

[0023] Both ends of the knife ring assembly unit 2 are provided with fixed block limiting bolt holes 4, and the fixed block limiting bolt holes 4 pass through the sliding groove. When the knife ring assembly unit 2 is assembled into a whole, the two sides of each knife ring fixing block 3 are respectively inserted into the sliding grooves of the two adjacent knife ring assembly units 2, and the limiting bolts are installed in the fixed block limiting bolt holes 4, and the knife ring fixing block 3 is located between the limiting bolts of the two adjacent knife ring assembly units 2.

[0024] After the knife ring assembly unit 2 is assembled into a whole, the knife ring fixing block 3 is located between the limiting bolts of two adjacent knife ring assembly units 2, and in order to prevent the knife ring fixing block 3 from being difficult to disassemble after the knife ring is working, the length of the knife ring fixing block 3 is smaller than the length of the sliding groove between the two limiting bolts, that is, a gap is left between the knife ring fixing block 3 and the limiting bolts, leaving a certain amount of activity space for the knife ring fixing block 3 without causing the knife ring assembly unit 2 to fall off.

[0025] When the blade is worn or needs to be replaced, only the specific blade ring assembly unit 2 needs to be replaced, without replacing the entire blade ring, which greatly saves time and cost.

[0026] When installing this quick-detachable roller cutter ring structure for excavating hard rock, each cutter ring fixing block 3 can be first placed into the cutter ring assembly unit 2, and each cutter ring assembly unit 2 can be fixed to a predetermined position. The cutter ring fixing block 3 can be moved through the heat dissipation holes of the cutter ring assembly unit 2 using tools such as a screwdriver.

[0027] First, install two of the knife ring assembly units 2, move the knife ring fixing block 3 to the middle of the two knife ring assembly units 2, and then screw the limiting bolt into the limiting bolt hole 4 of the fixing block. The two knife ring assembly units 2 are successfully fixed. When assembling the third knife ring assembly unit 2, move the other two knife ring fixing blocks 3 to the fixed position, and also screw in the limiting bolts. The knife ring is assembled.

[0028] The three knife ring assembly units 2 can also be installed at the same time. The three knife ring assembly units 2 are placed at the predetermined position, and the three knife ring fixing blocks 3 are adjusted to the predetermined position. After the limit bolts are screwed in, the knife ring is installed.

[0029] When disassembling the cutter ring, first remove the limit bolts of two of the cutter ring fixing blocks 3, then use tools to move the two cutter ring fixing blocks 3 to the pre-disassembled cutter ring assembly unit 2, then remove one of the cutter ring assembly units 2, and replace the cutter ring assembly unit 2 separately. Alternatively, continue to move the remaining cutter ring fixing blocks 3 to one of the cutter ring assembly units 2 to complete the disassembly of the remaining cutter ring assembly units 2.

Claims

1. A quick-detachable roller cutter ring structure for excavating hard rock, characterized in that: It is formed by splicing several knife ring assembly units, the knife ring assembly units are arc-shaped, a through sliding groove is arranged inside the knife ring assembly units along the arc, and a knife ring fixing block is slidably arranged in the sliding groove; Both ends of the knife ring assembly unit are provided with fixed block limit bolt holes, and the fixed block limit bolt holes pass through the sliding groove. When the knife ring assembly units are assembled into a whole, the two sides of each knife ring fixed block are respectively inserted into the sliding grooves of the two adjacent knife ring assembly units, and the limit bolts are installed in the fixed block limit bolt holes, and the knife ring fixed block is located between the limit bolts of the two adjacent knife ring assembly units.

2. The quick-detachable roller cutter ring structure for excavating hard rock according to claim 1, characterized in that: After the knife ring assembly units are assembled into a whole, the knife ring fixing block is located between the limiting bolts of two adjacent knife ring assembly units, and the length of the knife ring fixing block is less than the length of the sliding groove between the two limiting bolts.

3. The quick-detachable roller cutter ring structure for excavating hard rock according to claim 1, characterized in that: A plurality of heat dissipation holes are provided on the surface of the knife ring assembly unit along the sliding groove, and the heat dissipation holes and the sliding groove are connected.

4. The quick-detachable roller cutter ring structure for excavating hard rock according to claim 1, characterized in that: A plurality of alloy balls are inlaid on the outer side of the knife ring assembly unit, and the rigidity of the alloy balls is greater than the rigidity of the knife ring assembly unit.

5. The quick-detachable roller cutter ring structure for excavating hard rock according to claim 1, characterized in that: The knife ring structure is formed by splicing three knife ring assembly units, and the arc center angle corresponding to each knife ring assembly unit is 120°.

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