Anti-stress pin head and pin rod of spiral steel pipe drilling machine

Abstract

The utility model relates to a spiral steel pipe drilling machine anti-stress pin head and pin rod, and belongs to the field of spiral steel pipe piles, the spiral steel pipe drilling machine anti-stress pin head comprises a pin head, a fixing cylinder and a pin rod, the pin head is arranged on a drilling machine, the fixing cylinder is arranged on the pin head, a gap allowing a drill bit of the drilling machine to be inserted is formed between the fixing cylinder and the outer wall of the pin head, and a through hole is formed in the pin head in the radial direction of the pin head; a clamping groove is formed in the fixing cylinder in the radial direction of the pin head, and the pin rod penetrates through the clamping groove and the penetrating hole and penetrates through the drill bit. The contact area between the side wall of the fixing cylinder and the pin rod is increased, so that stress of the pin rod is dispersed to a plurality of supporting points making contact with the pin head and the fixing cylinder, the condition of stress concentration of the pin head and the pin rod is improved, abrasion of the pin head and the pin rod is reduced, the condition that the pin rod is seriously deformed and difficult to disassemble is improved, the replacement frequency of the pin head and the pin rod is reduced, and the replacement efficiency is improved. And the problems that the construction efficiency is influenced and the consumable cost is increased due to frequent replacement of the pin head and the pin shaft in the construction process of the spiral steel pipe pile are solved.

Description

Technical Field

[0001] The present application relates to the field of spiral steel pipe piles, and in particular to a stress-resistant pin head and pin rod of a spiral steel pipe drilling rig. Background Art

[0002] In the construction of photovoltaic power generation project pile foundations, spiral steel pipe piles have been widely used due to their significant advantages of high construction efficiency, minimal surface disturbance, and strong adaptability to low temperatures. Traditional spiral steel pipe piles are constructed by drilling anchor spiral steel piles into the earth and then pouring concrete to form the pile foundation.

[0003] At present, during the pile foundation construction process, the drill bit of the spiral steel pipe drilling rig is fixed by a pin head and a pin shaft. The traditional pin head is a round steel pipe with a slot at the end. The drill bit is plugged into the pin head, and then the pin shaft is passed through the slot to fix the drill bit. During subsequent construction, the mechanical characteristics of the pin head are manifested as thin-walled rods being subjected to stress, which is prone to stress concentration, causing rapid wear of the pin shaft, resulting in frequent replacement of the pin head and pin shaft, which seriously affects construction efficiency and increases the cost of consumables. Utility Model Content

[0004] In order to improve the problem of frequent replacement of pin heads and pin shafts during the construction of spiral steel pipe piles, which affects construction efficiency and increases consumable costs, the present application provides a stress-resistant pin head and pin rod for a spiral steel pipe drilling rig.

[0005] The present application provides a spiral steel pipe drilling rig stress-resistant pin head and pin rod adopting the following technical solutions:

[0006] A spiral steel pipe drilling rig anti-stress pin head and pin rod, comprising a pin head, a fixing cylinder and a pin rod, wherein the pin head is arranged on the drilling rig, the fixing cylinder is arranged on the pin head, a gap is formed between the fixing cylinder and the outer wall of the pin head for inserting the drill bit of the drilling rig, a through hole is opened on the pin head along the radial direction of the pin head, a slot is opened on the fixing cylinder along the radial direction of the pin head, and the pin rod passes through the slot and the through hole and passes through the drill bit.

[0007] By adopting the above technical solution, the construction workers insert the drill bit into the gap formed between the outer wall of the fixed cylinder and the pin head, then pass the pin rod through the slot and the through hole, and pass the pin rod through the drill bit. The pin rod can position the drill bit between the pin head and the fixed cylinder. During subsequent construction, the outer walls of the fixed cylinder and the pin head support the drill bit, and the side walls of the fixed cylinder increase the contact area with the pin rod, so that the force of the pin rod is dispersed to multiple support points in contact with the pin head and the fixed cylinder, improving the stress concentration of the pin head and the pin rod, reducing the wear of the pin head and the pin rod, improving the situation where the pin rod is severely deformed and difficult to disassemble, reducing the replacement frequency of the pin head and the pin rod, and thus improving the problem of frequent replacement of the pin head and the pin shaft during the construction of spiral steel pipe piles, affecting construction efficiency and increasing the cost of consumables.

[0008] Optionally, an abutment joint is provided at one end of the pin rod, and a locking nut is threadedly provided at the other end of the pin rod.

[0009] By adopting the above technical solution, construction workers pass the pin rod through the slot and the hole and through the drill bit, and then tighten the locking nut onto the pin rod to position the pin rod, thereby improving the stability of the pin rod in positioning the drill bit.

[0010] Optionally, the pin head is provided with a positioning assembly for positioning the pin head on the drilling rig, and the positioning assembly includes a positioning plate, a positioning bolt and a positioning nut. The positioning plate is provided on the pin head and fits on the drilling rig. A plurality of positioning bolts are passed through the positioning plate and passed through the drilling rig, and the positioning nut is threadedly provided on the positioning bolt.

[0011] By adopting the above technical solution, the construction workers move the pin head so that the positioning plate fits onto the drilling rig, and then pass multiple positioning bolts through the positioning plate and the drilling rig respectively, and then tighten the positioning nuts onto the positioning bolts. The pin head can be installed on the drilling rig, which facilitates the installation and removal of the pin head on the drilling rig.

[0012] Optionally, a plurality of reinforcing ribs are provided on the positioning plate, and the reinforcing ribs are connected to the pin heads.

[0013] By adopting the above technical solution, the ribs are strengthened to support the positioning plate, thereby improving the bearing capacity of the positioning plate and further improving the stability of the connection between the positioning plate and the drilling rig.

[0014] Optionally, rubber pads are circumferentially provided on the side walls of the through hole and the slot.

[0015] By adopting the above technical solution, when the pin rod passes through the through hole and the slot, the pin rod abuts against the rubber pad. During the subsequent construction process, the rubber pad provides a buffer between the pin rod and the pin head, as well as between the pin rod and the fixed tube, reducing the possibility of the pin rod being deformed under the action of the pin head or the fixed tube, and increasing the stability of the pin rod passing through the pin head and the fixed tube.

[0016] Optionally, a positioning head is provided on the side of the pin head facing the drilling rig, and the positioning head is used to be plugged into the drilling rig.

[0017] By adopting the above technical solution, when installing the pin head on the drilling rig, the construction workers move the pin head so that the pin head drives the positioning head to be plugged into the drilling rig. The positioning head locates the installation position of the pin head, and by plugging the positioning head into the drilling rig, the stability of the connection between the pin head and the drilling rig is improved.

[0018] Optionally, a guide block is provided on the positioning head, and the guide block is used to slide in the guide groove on the drilling rig. When the guide block slides in the guide groove on the drilling rig, the hole position on the positioning plate for the positioning bolt to pass through is opposite to the hole position on the drilling rig.

[0019] By adopting the above technical solution, when the construction personnel move the pin head and plug it into the drilling rig, the guide block slides into the guide groove. At this time, the hole position on the positioning plate for the bolt to pass through can be aligned with the hole position on the drilling rig, which is convenient for subsequent construction personnel to pass the positioning bolt through the positioning plate and install it on the drilling rig. The guide block abuts against the side wall of the guide groove, which can also improve the stability of the pin head plugged into the drilling rig, making it convenient for the drilling rig to drive the pin head to rotate.

[0020] Optionally, the pin head and the pin rod are both made of aluminum alloy.

[0021] By adopting the above technical solution, the durability of the pin head and pin rod can be improved by taking advantage of the easy processing, high strength, high rigidity and corrosion resistance of aluminum alloy.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The outer walls of the fixed cylinder and the pin head support the drill bit, and the side wall of the fixed cylinder increases the contact area with the pin rod, so that the force of the pin rod is dispersed to multiple support points in contact with the pin head and the fixed cylinder, improving the stress concentration of the pin head and the pin rod, reducing the wear of the pin head and the pin rod, improving the situation where the pin rod is severely deformed and difficult to disassemble, and reducing the replacement frequency of the pin head and the pin rod, thereby improving the problem of frequent replacement of the pin head and the pin shaft during the construction of spiral steel pipe piles, which affects the construction efficiency and increases the cost of consumables;

[0024] 2. The rubber pad provides a buffer between the pin rod and the pin head, as well as between the pin rod and the fixing cylinder, reducing the possibility of the pin rod deforming under the force of the pin head or the fixing cylinder, and increasing the stability of the pin rod inserted into the pin head and the fixing cylinder;

[0025] 3. When the construction personnel move the pin head and plug it into the drilling rig, the guide block slides into the guide groove. At this time, the hole on the positioning plate for the bolt to pass through can be aligned with the hole on the drilling rig, which is convenient for subsequent construction personnel to pass the positioning bolt through the positioning plate and install it on the drilling rig. The guide block abuts against the side wall of the guide groove, which can also improve the stability of the pin head plugged into the drilling rig, making it easier for the drilling rig to drive the pin head to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the anti-stress pin head and pin rod of the spiral steel pipe drilling rig in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the connection structure between the pin head and the drilling rig in an embodiment of the present application.

[0028] Figure 3 It is a partial cross-sectional view of the pin head and the fixing cylinder of the embodiment of the present application.

[0029] Figure numerals: 1. Pin head; 11. Through hole; 2. Fixing cylinder; 21. Slot; 3. Pin rod; 4. Abutment; 5. Locking nut; 6. Positioning assembly; 61. Positioning plate; 62. Positioning bolt; 63. Positioning nut; 7. Reinforcing rib; 8. Positioning head; 9. Guide block. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiments of the present application disclose a stress-resistant pin head and a pin rod of a spiral steel pipe drilling rig.

[0032] Reference Figure 1 、 Figure 2 The anti-stress pin head and pin rod of the spiral steel pipe drilling rig include a pin head 1, a fixing tube 2, a pin rod 3 and a positioning assembly 6. The positioning assembly 6 is installed on the pin head 1. The positioning assembly 6 is used to position the pin head 1 on the drilling rig. The positioning assembly 6 includes a positioning plate 61, a positioning bolt 62 and a positioning nut 63. The positioning plate 61 is installed on the pin head 1. The positioning plate 61 is used to fit with the flange on the drill rod of the drilling rig. A plurality of holes are circumferentially spaced apart on the positioning plate 61. A positioning bolt 62 is inserted into one of the holes, and the positioning bolt 62 is inserted into the flange on the drill rod of the drilling rig. The positioning nut 63 is threadedly installed on the positioning bolt 62.

[0033] The construction workers move the pin head 1, and the pin head 1 drives the positioning plate 61 to fit onto the flange on the drill rod of the drilling rig, so that the multiple holes circumferentially spaced on the positioning plate 61 are aligned with the holes on the flange on the drill rod of the drilling rig. Then the positioning bolt 62 is passed through the positioning plate 61 and through the flange on the drill rod of the drilling rig, and then the positioning nut 63 is tightened onto the positioning nut 63, so that the head of the positioning bolt 62 and the positioning nut 63 clamp the positioning plate 61 and the flange on the drill rod of the drilling rig, and the positioning installation of the pin head 1 on the drilling rig is completed. When the pin head 1 needs to be replaced later, it is only necessary to remove the positioning nut 63 and the positioning bolt 62, which improves the convenience of the construction workers in installing and removing the pin head 1 on the drilling rig.

[0034] Reference Figure 1 、 Figure 2 A plurality of reinforcing ribs 7 are welded at intervals on the circumference of the positioning plate 61, and the reinforcing ribs 7 are welded to the pin head 1. The reinforcing ribs 7 support the positioning plate 61, enhance the structural strength of the positioning plate 61, and improve the stability of the connection between the pin head 1 and the drilling rig through the positioning plate 61.

[0035] Reference Figure 1 、 Figure 2The pin head 1 is provided with a positioning head 8 at one end thereof, and the positioning head 8 is used to be plugged into the drill rod of the drilling rig. A guide block 9 is installed on the outer wall of the positioning head 8, and the guide block 9 is used to slide into the guide groove opened on the inner wall of the drill rod of the drilling rig. When the guide block 9 is located in the guide groove opened on the inner wall of the drill rod of the drilling rig, the multiple holes on the positioning plate 61 for the positioning bolts 62 to pass through are respectively aligned with the hole positions on the flange on the drill rod of the drilling rig.

[0036] When the drill bit of the drill rig is tightened, the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig, and the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig. The guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig, and the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig. The guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig, and the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig. The guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig, and the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig. The guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig, and the guide block 9 is tightened to the guide groove on the inner wall of the drill rod of the drill rig.

[0037] Reference Figure 1 、 Figure 3 The fixing tube 2 is welded and installed on the outer wall of the pin head 1. A gap is formed between the fixing tube 2 and the outer wall of the pin head 1 for inserting the drill bit of the drilling rig. A through hole 11 is opened on the pin head 1 along the radial direction of the pin head 1, and a slot 21 is opened on the fixing tube 2 along the radial direction of the pin head 1. The slot 21 is opposite to and connected with the through hole 11. The pin rod 3 passes through the through hole 11 and the slot 21, and the pin rod 3 is inserted into the drill bit inserted into the gap between the fixing tube 2 and the pin head 1. A butt joint 4 is installed at one end of the pin rod 3, and a locking nut 5 is threadedly installed at the other end of the pin rod 3.

[0038] The construction workers insert the drill bit into the gap between the outer wall of the fixed tube 2 and the pin head 1, and then pass the pin rod 3 through the fixed tube 2, the drill bit and the pin head 1 from the slot 21 and the through-hole 11 in turn, and make the pin rod 3 pass through the other side of the fixed tube 2, and then tighten the locking nut 5 onto the pin rod 3, so that the abutment head 4 and the locking nut 5 press the two sides of the fixed tube 2 tightly, positioning the pin rod 3, improving the stability of the pin rod 3 in positioning the drill bit, and completing the positioning and installation of the drill bit.

[0039] Reference Figure 1 、 Figure 3The pin head 1 and the pin rod 3 are both made of aluminum alloy. The aluminum alloy is easy to process, has high strength, high rigidity, and corrosion resistance, which makes it easy for construction workers to produce the pin head 1 and the pin rod 3, and improves the radial durability of the pin head 1 and the pin rod 3.

[0040] Reference Figure 3 Rubber pads are circumferentially installed on the inner walls of the through-hole 11 and the card slot 21. After the pin rod 3 passes through the through-hole 11 and the card slot 21, the rubber pad abuts against the pin rod 3. During subsequent construction, the rubber pad provides a buffer between the pin rod 3 and the pin head 1 and between the pin rod 3 and the fixed tube 2, reducing the wear of the pin rod 3 and the pin head 1, and reducing the possibility of the pin rod 3 being deformed under the action of the pin head 1 or the fixed tube 2, and increasing the stability of the pin rod 3 passing through the radial fixed tube 2 of the pin head 1.

[0041] The implementation principle of the anti-stress pin head and pin rod of a spiral steel pipe drilling rig in the embodiment of the present application is as follows: the construction personnel move the pin head 1 so that the positioning head 8 is plugged into the drill rod of the drilling rig, and the guide block 9 is slidably inserted into the guide groove provided on the drill rod of the drilling rig, so that the positioning plate 61 is fitted onto the flange on the drill rod of the drilling rig, and the positioning plate 61 is locked to the drill rod of the drilling rig by the positioning bolt 62 and the positioning nut 63, and then the drill bit is moved to be plugged into the gap between the fixed tube 2 and the pin head 1, the pin rod 3 is passed through the card slot 21, the through hole 11 and the drill bit, and the locking nut 5 is tightened to fix the drill bit. Head positioning, during subsequent construction, the outer walls of the fixed cylinder 2 and the pin head 1 support the drill bit, and the side walls of the fixed cylinder 2 increase the contact area with the pin rod 3, so that the force of the pin rod 3 is dispersed to multiple support points in contact with the pin head 1 and the fixed cylinder 2, improving the stress concentration of the pin head 1 and the pin rod 3, reducing the wear of the pin head 1 and the pin rod 3, improving the situation where the pin rod 3 is severely deformed and difficult to disassemble, reducing the replacement frequency of the pin head 1 and the pin rod 3, and thus improving the problem of frequent replacement of the pin head 1 and the pin shaft during the construction of the spiral steel pipe pile, affecting the construction efficiency and radially increasing the cost of consumables.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A stress-resistant pin head and pin rod for a spiral steel pipe drilling rig, characterized by: The invention comprises a pin head (1), a fixing cylinder (2) and a pin rod (3), wherein the pin head (1) is arranged on a drilling machine, the fixing cylinder (2) is arranged on the pin head (1), a gap is formed between the fixing cylinder (2) and the outer wall of the pin head (1) for inserting a drill bit of the drilling machine, a through hole (11) is provided on the pin head (1) along the radial direction of the pin head (1), a slot (21) is provided on the fixing cylinder (2) along the radial direction of the pin head (1), and the pin rod (3) passes through the slot (21) and the through hole (11) and passes through the drill bit.

2. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 1, characterized in that: One end of the pin rod (3) is provided with an abutment joint (4), and the other end of the pin rod (3) is threadedly provided with a locking nut (5).

3. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 1, characterized in that: The pin head (1) is provided with a positioning assembly (6) for positioning the pin head (1) on a drilling rig. The positioning assembly (6) comprises a positioning plate (61), a positioning bolt (62) and a positioning nut (63). The positioning plate (61) is provided on the pin head (1) and is fitted with the drilling rig. A plurality of positioning bolts (62) are provided on the positioning plate (61) and are provided on the drilling rig. The positioning nut (63) is threadedly provided on the positioning bolt (62).

4. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 3, characterized in that: A plurality of reinforcing ribs (7) are provided on the positioning plate (61), and the reinforcing ribs (7) are connected to the pin head (1).

5. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 1, characterized in that: Rubber pads are circumferentially provided on the side walls of the through hole (11) and the slot (21).

6. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 3, characterized in that: A positioning head (8) is provided on the side of the pin head (1) facing the drilling rig, and the positioning head (8) is used for being plugged into the drilling rig.

7. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 6, characterized in that: The positioning head (8) is provided with a guide block (9), and the guide block (9) is used to slide in the guide groove on the drilling rig. When the guide block (9) slides in the guide groove on the drilling rig, the hole position on the positioning plate (61) for the positioning bolt (62) to pass through is aligned with the hole position on the drilling rig.

8. The stress-resistant pin head and pin rod of a spiral steel pipe drilling rig according to claim 1, characterized in that: The pin head (1) and the pin rod (3) are both made of aluminum alloy.

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