Casing pipe for rotary drilling rig

Abstract

The utility model discloses a casing pipe for a rotary drilling rig, which comprises a driver fixedly mounted at the lower end of a connecting disc through a screw, a casing pipe body is connected to the inner side of the lower end of the driver, a casing pipe shoe is arranged on the outer side of the lower end of the casing pipe body, and a lower connecting sleeve is mounted at the joint of the casing pipe body and the casing pipe shoe; the upper connecting sleeve is arranged on the outer side of the upper end of the lower connecting sleeve and located on the outer side of the lower end of the sleeve body; and the positioning blocks are fixedly mounted at the inner side ends of the lower connecting sleeve and the upper connecting sleeve at equal angles respectively. The utility model belongs to the technical field of sleeves, and aims to solve the problems that in the prior art, a plurality of groups of bolts are used for fixing, so that the installation is complicated, and the positioning effect of the whole installation is poor. The technical effects that the number of the used first fixing bolts can be effectively reduced, the convenience of overall splicing installation is improved, and meanwhile the good positioning and reinforcing functions are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of casing, in particular to a casing for a rotary drilling rig. Background Art

[0002] The rotary drilling rig is an important construction equipment in rotary excavation construction. It has the advantages of high degree of automation, fast hole-making speed, environmental protection and sanitation. It is widely used in modern pile foundation construction. However, when encountering soft strata such as river beach sand, affected by factors such as stratum geology and drilling speed of the drilling rig, rotary drilling construction is prone to pile foundation accidents such as hole collapse and diameter reduction, which affects the quality of pile foundation engineering and construction progress. At present, in order to solve the above problems, the method of rotary drilling rig combined with full casing drilling and wall protection is often used for pile foundation construction. On the basis of rotary excavation construction, a set of casing and connecting device is added, and the drilling rig is connected to the casing through the connecting piece. The casing is driven by the power system of the drilling rig to drill, which plays a role of advanced wall protection, and then the rotary drilling bit is used to drill to the designed depth to take soil. After the hole is cleaned, the steel cage is lowered and concrete is poured. After the concrete is poured to a certain depth, the casing is gradually pulled out until the pile foundation is poured.

[0003] However, most sleeves are fixed by multiple sets of bolts during the assembly and installation process, which makes the installation more complicated, resulting in a slow overall disassembly and assembly speed. At the same time, the positioning effect of the overall installation is poor, which easily leads to the phenomenon of misalignment of the threaded holes, causing great inconvenience. Utility Model Content

[0004] Therefore, the utility model provides a casing for a rotary drilling rig to solve the above problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] According to a first aspect of the utility model, a casing for a rotary drilling rig comprises:

[0007] A driver is fixedly mounted on the lower end of the connection plate by screws, and a casing body is connected to the inner side of the lower end of the driver, a casing boot is arranged on the outer side of the lower end of the casing body, and a lower connecting sleeve is installed at the connection between the casing body and the casing boot;

[0008] An upper connecting sleeve, which is arranged on the outer side of the upper end of the lower connecting sleeve and located on the outer side of the lower end of the sleeve body, and a connecting ring located inside the lower end of the upper connecting sleeve is integrally fixedly installed on the outer side of the upper end of the lower connecting sleeve, and a first fixing bolt is penetrated inside the lower connecting sleeve and the upper connecting sleeve;

[0009] The positioning blocks are fixedly installed at equal angles on the inner ends of the lower connecting sleeve and the upper connecting sleeve.

[0010] Furthermore, threaded holes matching the first fixing bolts are formed through the interior of the upper end of the casing shoe and the interior of the lower end of the casing body.

[0011] Furthermore, cutting teeth are fixedly mounted on the outer side of the lower end of the casing shoe at equal angles by screws, and the upper end of the casing shoe is located on the inner side of the lower connecting sleeve.

[0012] Furthermore, the lower end of the sleeve body is located at the inner end of the upper connecting sleeve, and the upper connecting sleeve is respectively connected to the lower connecting sleeve and the connecting ring in a rotating manner.

[0013] Furthermore, reinforcing ribs are fixedly mounted on the inner ends of the lower connecting sleeve and the upper connecting sleeve.

[0014] Furthermore, the outer walls of the casing body and the casing shoe are both provided with prefabricated grooves matched with the positioning blocks, and the positioning blocks and the prefabricated grooves are arranged in a one-to-one correspondence.

[0015] Furthermore, second fixing bolts for fixing are provided at equal angles inside the connection between the driver and the sleeve body.

[0016] The utility model has the following advantages:

[0017] 1. Through the positioning block, the positioning block can be inserted into the prefabricated grooves opened inside the outer wall of the casing body and the casing shoe, so as to facilitate the positioning and reinforcement of the casing body and the casing shoe, respectively, which can effectively reduce the number of the first fixing bolts used and improve the convenience of the overall splicing installation;

[0018] 2. The first fixing bolts are provided through the interior of the lower connecting sleeve and the upper connecting sleeve, and the first fixing bolts are provided one by one with the threaded holes. After rotation, the first fixing bolts are aligned with the threaded holes, so that the lower connecting sleeve and the upper connecting sleeve can be fixed by the first fixing bolts respectively, thereby facilitating installation;

[0019] 3. Through the lower connecting sleeve and the upper connecting sleeve, the lower connecting sleeve and the upper connecting sleeve can better position the connection between the casing body and the casing boot, and can strengthen the firm effect of the connection between the casing body and the casing boot. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front cross-sectional view of a casing for a rotary drilling rig provided in some embodiments of the utility model.

[0021] Figure 2 A top cross-sectional view of the connection between a casing shoe and a lower connecting sleeve of a casing for a rotary drilling rig provided in some embodiments of the utility model;

[0022] Figure 3A casing for a rotary drilling rig provided in some embodiments of the utility model Figure 1 Enlarged view of point A in the middle.

[0023] In the figure: 1, connecting plate, 2, driver, 3, casing body, 4, casing boot, 5, cutting teeth, 6, lower connecting sleeve, 7, upper connecting sleeve, 8, connecting ring, 9, reinforcing rib, 10, first fixing bolt, 11, positioning block, 12, prefabricated groove, 13, second fixing bolt, 14, threaded hole. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, a casing for a rotary drilling rig in an embodiment of the first aspect of the utility model comprises: a driver 2 is fixedly installed on the lower end of a connecting plate 1 by screws, and a casing body 3 is connected to the inner side of the lower end of the driver 2. When installing, the connecting plate 1 is first connected to the power head of the drilling rig, and then the driver 2 is installed on the connecting plate 1 by screws. A casing boot 4 is arranged on the outer side of the lower end of the casing body 3, and a lower connecting sleeve 6 is installed at the connection between the casing body 3 and the casing boot 4. An upper connecting sleeve 7 is arranged on the outer side of the upper end of the lower connecting sleeve 6 and is located on the outer side of the lower end of the casing body 3. When the casing body 3 and the casing boot 4 are spliced ​​and installed, the lower connecting sleeve 6 can be first plugged and installed on the outer side of the upper end of the casing boot 4;

[0027] The positioning blocks 11 are fixedly installed at equal angles on the inner ends of the lower connecting sleeve 6 and the upper connecting sleeve 7, respectively. The outer walls of the casing body 3 and the casing boot 4 are provided with prefabricated grooves 12 that match the positioning blocks 11, and the positioning blocks 11 and the prefabricated grooves 12 are arranged in a one-to-one correspondence. The upper end of the casing boot 4 is located on the inner side of the lower connecting sleeve 6, and the outer side of the lower end of the casing boot 4 is fixedly installed with cutting teeth 5 at equal angles by screws. During installation, the positioning block 11 installed inside the lower end of the lower connecting sleeve 6 is plugged into the prefabricated groove 12 opened inside the upper wall of the casing boot 4 until it is inserted to the bottom, and then the lower connecting sleeve is rotated. 6, so that the lower connecting sleeve 6 drives the positioning block 11 to engage and insert into the smaller space in the prefabricated groove 12, the lower connecting sleeve 6 and the upper connecting sleeve 7 are both provided with a first fixing bolt 10, and the upper end of the casing shoe 4 and the lower end of the casing body 3 are both provided with a threaded hole 14 adapted to the first fixing bolt 10, the first fixing bolt 10 after rotation is aligned with the threaded hole 14, and then the first fixing bolt 10 is rotated and inserted into the casing shoe 4, so that the first fixing bolt 10 is threadedly connected with the casing shoe 4 through the threaded hole 14, thereby facilitating the fixing of the lower connecting sleeve 6;

[0028] The outer side of the upper end of the lower connecting sleeve 6 is integrally fixedly installed with a connecting ring 8 located inside the lower end of the upper connecting sleeve 7. The lower end of the sleeve body 3 is located at the inner end of the upper connecting sleeve 7, and the upper connecting sleeve 7 is respectively connected to the lower connecting sleeve 6 and the connecting ring 8 in a rotating manner. After the lower connecting sleeve 6 is fixedly installed, the sleeve body 3 to be spliced ​​and installed is installed to the outer side of the upper end of the sleeve boot 4, so that the prefabricated groove 12 opened at the bottom of the lower end of the sleeve body 3 is aligned with the positioning block 11, and then the upper connecting sleeve 7 is rotated to make the upper connecting sleeve 7 drive the positioning block 11 is inserted into the smaller space of the prefabricated groove 12, so that the casing body 3 and the casing shoe 4 can be positioned by the lower connecting sleeve 6 and the upper connecting sleeve 7, and the position of the upper connecting sleeve 7 can be fixed by the first fixing bolt 10. The lower connecting sleeve 6 and the upper connecting sleeve 7 can strengthen the firm effect of the connection between the casing body 3 and the casing shoe 4, and can effectively reduce the number of the first fixing bolts 10 used, and improve the convenience of the overall splicing installation. Similarly, two sets of casing bodies 3 can be spliced ​​and installed through the above steps;

[0029] The inner ends of the lower connecting sleeve 6 and the upper connecting sleeve 7 are fixedly installed with reinforcing ribs 9, which respectively improve the connection effects between the lower connecting sleeve 6 and the upper connecting sleeve 7 and the casing boot 4 and the casing body 3. The connection between the driver 2 and the casing body 3 is penetrated by second fixing bolts 13 for fixing at equal angles. After the casing body 3 and the casing boot 4 are spliced ​​and installed, the casing body 3 is assembled and installed on the outer side of the lower end of the driver 2 and fixed by the second fixing bolts 13.

Claims

1. A casing for a rotary drilling rig, characterized in that: include: A driver (2) is fixedly mounted on the lower end of the connection plate (1) by means of screws, and the inner side of the lower end of the driver (2) is connected to a casing body (3), a casing boot (4) is arranged on the outer side of the lower end of the casing body (3), and a lower connecting sleeve (6) is installed at the connection between the casing body (3) and the casing boot (4); An upper connecting sleeve (7) is arranged on the outer side of the upper end of the lower connecting sleeve (6) and is located on the outer side of the lower end of the sleeve body (3), and a connecting ring (8) located inside the lower end of the upper connecting sleeve (7) is integrally fixedly installed on the outer side of the upper end of the lower connecting sleeve (6), and a first fixing bolt (10) is penetrated inside the lower connecting sleeve (6) and the upper connecting sleeve (7); The positioning blocks (11) are fixedly mounted at equal angles on the inner ends of the lower connecting sleeve (6) and the upper connecting sleeve (7).

2. The casing for a rotary drilling rig according to claim 1, characterized in that: The upper end interior of the casing shoe (4) and the lower end interior of the casing body (3) are both penetrated with threaded holes (14) that are compatible with the first fixing bolts (10).

3. The casing for a rotary drilling rig according to claim 2, characterized in that: The outer side of the lower end of the casing shoe (4) is fixed with cutting teeth (5) at equal angles by means of screws, and the upper end of the casing shoe (4) is located on the inner side of the lower connecting sleeve (6).

4. The casing for a rotary drilling rig according to claim 2, characterized in that: The lower end of the sleeve body (3) is located at the inner end of the upper connecting sleeve (7), and the upper connecting sleeve (7) is respectively connected to the lower connecting sleeve (6) and the connecting ring (8) in a rotating manner.

5. The casing for a rotary drilling rig according to claim 4, characterized in that: The inner ends of the lower connecting sleeve (6) and the upper connecting sleeve (7) are both fixedly mounted with reinforcing ribs (9).

6. The casing for a rotary drilling rig according to claim 3, characterized in that: The outer walls of the casing body (3) and the casing shoe (4) are both provided with prefabricated grooves (12) adapted to the positioning blocks (11), and the positioning blocks (11) and the prefabricated grooves (12) are arranged in a one-to-one correspondence.

7. The casing for a rotary drilling rig according to claim 1, characterized in that: Second fixing bolts (13) for fixing are provided at equal angles inside the connection between the driver (2) and the sleeve body (3).

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