High-performance drill rod and drill rod assembly

Abstract

The invention relates to the technical field of breaking hammers and provides a high-performance drill rod and a drill rod assembly to solve the problems that only high-performance tissues can be obtained on the surface of a large-diameter drill rod in the heat treatment link, and the drill rod is slowly cracked after being used for a long time and is broken. A supporting rib is arranged on the upper side in the groove, a partition rib is arranged on the lower side in the groove, and a flat pin hole is formed in the drill rod and located in the groove and located below the supporting rib. The drill rod assembly comprises a lower cylinder body, an inner sleeve, an inner sleeve pin rod, an outer sleeve, an outer sleeve pin rod, a flat pin and a flat pin pin rod, the inner sleeve is sleeved at the upper end of the drill rod, the outer sleeve is sleeved in the middle of the drill rod, and the drill rod is inserted in the lower cylinder body and is fixed through the flat pin and the flat pin pin rod. The method has the advantages that more surfaces of the drill rod in the heat treatment link make contact with quenching liquid, the strength of the drill rod is improved, the service life of the drill rod is prolonged, and the failure rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of breaker hammers, and in particular to a high-performance drill rod and a drill rod assembly. Background Art

[0002] A breaker hammer is typically mounted on a mainframe with a cantilever structure, such as an excavator. The cantilever primarily applies force to the breaker in the forward and backward directions. Driven by a hydraulic cylinder, the cantilever structure can exert significant force in this direction. The mainframe's left and right movement is primarily used to locate the work point, and its structure, compared to the front and back, cannot exert significant force in this direction. During operation, after the drill rod is struck deep into the rock, the mainframe applies a pulling force to the breaker in the forward and backward directions, prying apart the already broken rock.

[0003] At present, the drill rods of breaker hammers are bulky and easy to break. Using better materials can reduce the failure rate, but the cost is too high. The reason is that the heat treatment process of large-diameter drill rods can only obtain high-performance structures on the surface. The quenching performance decreases gradually with the thickness of the steel. However, the drill rods often need to overcome large bending forces in the use environment, and cracks will gradually appear and break over time. Summary of the Invention

[0004] The present invention provides a high-performance drill rod and a drill rod assembly to solve the problem that the heat treatment process of the above-mentioned large-diameter drill rod can only obtain a high-performance structure on the surface, and the drill rod will gradually crack and break after long-term use.

[0005] To solve the above technical problems, the present invention provides a technical solution: a high-performance drill rod and a drill rod assembly, comprising a drill rod and a drill rod assembly, wherein the main body of the drill rod adopts a special-shaped structure, grooves are symmetrically provided on both sides of the drill rod, support ribs are provided on the upper side of the grooves, and spacer ribs are provided on the lower side of the grooves, and a flat pin hole is provided on the drill rod and located in the groove, and the flat pin hole is located below the support ribs;

[0006] The drill rod assembly includes a lower cylinder body, an inner sleeve, an inner sleeve pin rod, an outer sleeve, an outer sleeve pin rod, a flat pin, and a flat pin pin rod. The inner sleeve is sleeved on the upper end of the drill rod, the outer sleeve is sleeved on the middle of the drill rod, and the drill rod is inserted into the lower cylinder body and fixed by the flat pin and the flat pin pin rod.

[0007] Furthermore, the front of the lower cylinder body is provided with a first socket, a second socket, and a third socket, the lower cylinder body is provided with a fourth socket, one side of the inner sleeve is provided with an inner sleeve pin groove, the two sides of the outer sleeve are symmetrically provided with outer sleeve pin grooves, and one side of the flat pin is provided with a flat pin rod hole;

[0008] The inner sleeve pin is inserted into the first insertion hole and matched with the inner sleeve pin groove for fixing the drill rod and the inner sleeve;

[0009] The outer sleeve pin is inserted into the second insertion hole and matched with the outer sleeve pin groove for fixing the drill rod and the outer sleeve;

[0010] The flat pin is inserted into the third insertion hole and matched with the flat pin hole to fix the drill rod and the flat pin;

[0011] The flat pin is inserted into the fourth insertion hole and matched with the flat pin hole to be used for fixing the drill rod and the lower cylinder body.

[0012] Furthermore, the inner portion of the inner sleeve and the outer sleeve are both provided with special-shaped holes.

[0013] Furthermore, the upper groove, the middle groove and / or the lower groove are filled with any one of injection molding material or rubber strips.

[0014] Furthermore, the cross-section of the grooves is in the shape of a trapezoid that expands inwards.

[0015] The advantages of the present invention are: the special-shaped drill rod structure is combined with the groove, so that the drill rod has a larger contact area with the quenching liquid during the heat treatment process, and more high-performance metal structures can be obtained. The drill rod has higher and more uniform hardness and toughness, and its impact resistance, bending resistance and fatigue resistance are better than those of traditional round drill rods, thereby increasing the strength of the drill rod to increase the service life of the drill rod, reducing the failure rate of the breaker during operation, and reducing the weight of the drill rod, thereby reducing the heat treatment cost and transportation cost while increasing the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the explosion structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the use structure of the drill rod assembly of the present invention.

[0018] Figure 3 It is a schematic diagram of the drill rod installation structure of the present invention.

[0019] Figure 4 It is a cross-sectional view of the assembly structure of the present invention.

[0020] Figure 5 It is a schematic plan view of the drill rod of the present invention.

[0021] Figure 6 It is a schematic diagram of the cross-sectional view of the drill rod at the lower groove of the present invention.

[0022] Figure 7 It is a schematic diagram of the inner sleeve structure of the schematic diagram of the present invention.

[0023] Figure 8 It is a schematic diagram of the jacket structure of the present invention.

[0024] Figure 9 This is a diagram of one usage state of the drill rod of the present invention.

[0025] As shown in the figure: 1. Lower cylinder body; 103. First socket; 104. Second socket; 105. Third socket; 106. Fourth socket; 2. Drill rod; 201. Groove; 202. Support rib; 203. Spacer rib; 204. Flat pin hole; 3. Inner sleeve; 301. Inner sleeve pin stick; 302. Inner sleeve pin groove; 4. Outer sleeve; 401. Outer sleeve pin stick; 402. Outer sleeve pin groove; 5. Flat pin; 501. Flat pin stick; 502. Flat pin stick hole. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings.

[0027] Combined with attachment Figure 1-8 A high-performance drill rod and drill rod assembly, including a drill rod 2 and a drill rod 2 assembly. The main body of the drill rod 2 adopts a special-shaped structure. Grooves 201 are symmetrically provided on both sides of the drill rod 2. Support ribs 202 are provided on the upper side of the groove 201. The support ribs 202 are used to support the flat pin 5. A partition rib 203 is provided on the lower side of the groove 201. The partition rib 203 is used to prevent gravel from entering the gap and getting stuck, and to prevent grease (butter) from leaking out. A flat pin 5 hole 204 is provided on the drill rod 2 and located in the groove 201. The flat pin 5 hole 204 is located below the support rib 202.

[0028] Combined with attachment Figure 6 The drill rod 22 has an optimized non-circular (special-shaped) cross-section (such as a circular variant with ribs). Different from the traditional round rod, grooves 201 are symmetrically provided on both sides. The cross-section of the groove 201 is a trapezoid that expands inward (that is, the groove mouth is narrow and the groove bottom is wide), thereby increasing the contact area and fluidity of the coolant during quenching.

[0029] The striking head at the lower end of the drill rod 2 can be made into any one of a straight shape, a conical shape, a four-sided forging shape or an eight-sided forging shape according to working conditions.

[0030] The groove 201 is filled with rubber / polyurethane strips, and the filler and the strips can buffer vibration and reduce internal wear.

[0031] Combined with attachment Figure 9 When the ribs are removed, the groove 201 is filled with a wear-resistant elastic injection molding material (such as polyurethane).

[0032] Combined with attachment Figure 7-8 The inner holes of the inner sleeve 3 and the outer sleeve 4 are both special-shaped holes that precisely match the two sections of the drill rod to ensure no relative sliding and effectively transmit impact force and torque.

[0033] The inner sleeve 3 is provided with an inner sleeve pin groove 302 , and the outer sleeve 4 is provided with an outer sleeve pin groove 402 at symmetrical positions on both sides.

[0034] The front of the lower cylinder body 1 is provided with a first plug hole 103 , a second plug hole 104 , and a third plug hole 105 , and the interior of the lower cylinder body 1 is provided with a fourth plug hole 106 .

[0035] The flat pin 5 is a pin shaft with a rectangular or quasi-rectangular cross-section made of high-strength steel, and a flat pin hole 502 is provided on the front side thereof.

[0036] The flat pin rod 501 is used to pass through the insertion hole of the lower cylinder body 1 and be inserted into the flat pin rod hole 502 of the corresponding component to achieve locking.

[0037] Quenching treatment of the drill rod 2: The drill rod 2 heated to the austenitizing temperature is immersed in a vigorously stirred quenching liquid (such as a water-based polymer solution or a rapid quenching oil). The special-shaped structure of the drill rod 2 allows the quenching liquid to quickly and evenly wrap the entire surface of the drill rod 2, and can directly act on the equivalent area of ​​the "core" of the drill rod 2 which is difficult to cool quickly compared to the circular cross-section. This ensures that a high-hardness, high-strength martensite or lower bainite structure is obtained on the entire surface of the drill rod, and the problem of insufficient hardness of the core of the drill rod 2 is solved.

[0038] In a specific implementation case, the inner sleeve 3 is sleeved on the upper end of the drill rod 2. The interior of the inner sleeve 3 is a special-shaped hole that precisely matches the special-shaped contour of the upper end of the drill rod 2 to ensure a tight fit and no relative rotation.

[0039] The outer sleeve 4 is sleeved on the middle predetermined position of the drill rod 2. The inside of the outer sleeve 4 is also a special-shaped hole that matches the special-shaped contour of the middle part of the drill rod 2.

[0040] The flat pin 5 is initially placed at the flat pin hole 204 on the drill rod 2 .

[0041] Insert the assembled drill rod 2, inner sleeve 3, outer sleeve 4, and flat pin 5 assembly into the drill rod 2 installation cavity of the lower cylinder body 1.

[0042] Fixing the inner sleeve 3: Insert the inner sleeve pin 301 from the first socket 103 on the side of the lower cylinder body 1, so that it passes through the wall of the lower cylinder body 1 and is accurately inserted into the inner sleeve pin groove 302 on the inner sleeve 3. This operation firmly fixes the inner sleeve 3 (including the upper end of the drill rod 2) on the lower cylinder body 1.

[0043] Fixing the outer sleeve 4: Insert the outer sleeve pin 401 from the second socket 104 on the side of the lower cylinder body 1, so that it passes through the wall of the lower cylinder body 1 and is accurately inserted into the outer sleeve pin groove 402 symmetrically arranged on both sides of the outer sleeve 4. This operation firmly fixes the outer sleeve 4 (including the middle part of the drill rod 2) on the lower cylinder body 1.

[0044] Fixing the flat pin 5: Ensure that the flat pin 5 is aligned with the flat pin hole 204 of the drill rod 2 and the fourth insertion hole 106 on the lower cylinder body 1. Push or knock the flat pin 5 through the flat pin hole 204 of the drill rod 2. This operation directly uses the flat pin 5 to achieve the key connection and torque transmission between the drill rod 2 and the lower cylinder body 1.

[0045] Insert the flat pin rod 501 from the third socket 105 on the side of the lower cylinder body 1, so that it passes through the wall of the lower cylinder body 1 and is accurately inserted into the flat pin rod hole 502 on the side of the flat pin 5. This operation locks the flat pin 5 and prevents it from falling out from the fourth socket 106.

[0046] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A high-performance drill rod and drill rod assembly, comprising a drill rod assembly and a drill rod (2), characterized in that: The main body of the drill rod (2) adopts a special-shaped structure, grooves (201) are symmetrically provided on both sides of the drill rod (2), support ribs (202) are provided on the upper side of the groove (201), and spacer ribs (203) are provided on the lower side of the groove (201). A flat pin hole (204) is provided on the drill rod (2) and located in the groove (201), and the flat pin hole (204) is located below the support rib (202). The drill rod assembly comprises a lower cylinder body (1), an inner sleeve (3), an inner sleeve pin stick (301), an outer sleeve (4), an outer sleeve pin stick (401), a flat pin (5), and a flat pin pin stick (501); the inner sleeve (3) is sleeved on the upper end of the drill rod (2); the outer sleeve (4) is sleeved on the middle of the drill rod (2); the drill rod (2) is inserted into the lower cylinder body (1) and fixed by the flat pin (5) and the flat pin pin stick (501); 2. A high-performance drill rod and drill rod assembly according to claim 1, characterized in that: The front of the lower cylinder body (1) is provided with a first plug hole (103), a second plug hole (104), and a third plug hole (105); the lower cylinder body (1) is provided with a fourth plug hole (106); one side of the inner sleeve (3) is provided with an inner sleeve pin groove (302); both sides of the outer sleeve (4) are symmetrically provided with outer sleeve pin grooves (402); and one side of the flat pin (5) is provided with a flat pin rod hole (501); The inner sleeve pin rod (301) is inserted into the first insertion hole (103) and matched with the inner sleeve pin groove (302) to fix the drill rod (2) and the inner sleeve (3); The outer sleeve pin (401) is inserted into the second insertion hole (104) and matched with the outer sleeve pin groove (402) to fix the drill rod (2) and the outer sleeve (4); The flat pin rod (501) is inserted into the third insertion hole (105) and matched with the flat pin rod hole (502) to fix the drill rod (2) and the flat pin (5); The flat pin (5) is inserted into the fourth insertion hole (106) and matched with the flat pin hole (204) to fix the drill rod (2) and the lower cylinder body (1).

3. A high-performance drill rod and drill rod assembly according to claim 1, characterized in that: The inner sleeve (3) and the outer sleeve (4) are both provided with special-shaped through holes.

4. A high-performance drill rod and drill rod assembly according to claim 1, characterized in that: The groove (201) is filled with any one of injection molding material and rubber strip.

5. A high-performance drill rod and drill rod assembly according to claim 1, characterized in that: The cross section of the groove (201) is in the shape of a trapezoid that expands inwards.

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