Threaded connection drill rod capable of rotating positively and negatively for construction

Abstract

The invention discloses a threaded connection drill rod capable of rotating forwards and backwards for construction, and relates to the technical field of drill rod couplings, the surface of a first drill rod is provided with an anti-falling mechanism, the surface of a first drill rod body is provided with a clamping mechanism, and the surface of the first drill rod body is provided with a clamping mechanism. The threaded connection drill rod capable of rotating forwards and backwards for construction comprises a first drill rod body, a clamping mechanism and an anti-falling mechanism, the clamping mechanism is used for achieving rotation of the drill rod in the forward and reverse directions, and the anti-falling mechanism comprises a connecting unit which is arranged on the surface of the first drill rod body. A structure for realizing larger torque and transmitting axial pressure in a spline shaft and spline groove connection mode and a structure for realizing transmitting axial tension in a freely movable threaded sleeve and external threads are connected, so that the engineering drilling rod urgently needed by people in engineering practice is practically solved, and the engineering drilling rod is reasonable in structure, firm, durable, convenient to connect, wide in application and high in practicability. And actual construction requirements are better met.

Description

Technical Field

[0001] The invention relates to the technical field of drill rod joints, in particular to a threaded drill rod which can rotate forwards and backwards for construction. Background Art

[0002] Threaded drill rods are the most widely used in the construction of drilling pile holes such as geological drilling, engineering surveys, soil anchoring, foundation reinforcement, etc. Drill rod connectors are usually used to connect the drill rod to the drill bit. At this time, threaded drill rods are used.

[0003] Announcement No. CN118933594A discloses a drill rod that can prevent falling after the threaded connection fails, including a drill rod body, the axial rear end of the drill rod body is fixedly connected to a drill rod female joint assembly, the axial front end of the drill rod body is fixedly connected to a drill rod male joint assembly, the drill rod male joint assembly includes a drill rod male joint, an insert rod and a retaining ring are coaxially arranged in the drill rod male joint, and the drill rod female joint assembly includes a drill rod female joint, a spring seat is arranged in the drill rod female joint, and a ball, a spring seat cap and a spring are arranged on the spring seat. The drill rod of the present invention is structurally optimized, and a connecting rod is arranged inside the drill rod male joint. When the drill rod male joint and the drill rod female joint are engaged, the insert rod is in a locked state. When the drill rod thread breaks, the insert rod that remains in a locked state can prevent the remaining drill rod from falling into the bottom of the hole. The drill rod in the hole can be pulled out of the hole by transmitting pulling force using the insert rod, which saves manpower and material resources and provides technical equipment guarantee for intelligent drilling construction in coal mines.

[0004] Announcement No. CN103089165A discloses a double-step thread buckle for connecting drilling drill pipes, which includes a cylindrical pin component and an annular sleeve component, the front end of the pin component is provided with a male thread, the inner wall of the sleeve component is provided with a female thread, the pin component and the sleeve component are connected by a thread, and is characterized in that the pin component is provided with a first step surface and a second step surface in sequence, the first step surface is located between the second step surface and the male thread, and the inner wall of one end of the sleeve component connected to the pin component is provided with a first shoulder and a second shoulder in sequence, the first shoulder is located between the second shoulder and the female thread, the first shoulder coincides with the first step surface, and the second shoulder coincides with the second step surface. The advantages of the present invention are that multiple seals can be achieved, and higher strength and torque can be borne, which fully meets the drilling needs of deep wells and high-difficulty wells, and can effectively extend the service life of the drill pipe.

[0005] The above-mentioned drill rod can usually only rotate forward, but in some engineering drilling, the drill rod needs to rotate both forward and reverse, and the threaded drill rod can only withstand unidirectional torque. When reversing, the drill rod joint will be unfastened, causing the drill rod to fall off, and the substantial needs of engineering drilling cannot be met. Summary of the invention

[0006] The object of the present invention is to provide a threaded drill rod for construction that can rotate forwards and backwards, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a threaded drill rod for construction that can rotate forward and backward, comprising a first drill rod body and a second drill rod body, wherein the surface of the first drill rod is provided with an anti-drop mechanism;

[0008] The surface of the first drill rod body is provided with a clamping mechanism, and the clamping mechanism is used to realize the rotation of the drill rod in forward and reverse directions;

[0009] The anti-falling mechanism comprises a connecting unit, which is arranged on the surface of the first drill rod body and is used to increase the stability between the first drill rod body and the second drill rod body;

[0010] The anti-falling mechanism further comprises an anti-skid unit, which is arranged on the surface of the first drill rod body and is used to prevent the clamping mechanism from being separated.

[0011] Preferably, the clamping mechanism includes a spline shaft, which is fixedly mounted on one end of the first drill rod body, and a clamping block is fixedly mounted on one end of the second drill rod body, and a spline groove is provided in the inner cavity of the clamping block, and the inner cavity of the spline groove is slidably connected to the surface of the spline shaft, a threaded body is fixedly mounted on the surface of the first drill rod, and a threaded sleeve is slidably connected to the surface of the second drill rod, and the inner cavity of the threaded sleeve is threadedly connected to the surface of the threaded body.

[0012] Preferably, the connecting unit includes a first clamping rod, which is fixedly installed in the inner cavity of the spline groove. A placement hole is opened inside the first drill rod body, and the inner cavity of the placement hole is rotatably connected to a second clamping rod. The first end of the second clamping rod passes through the inner cavity of the spline shaft, and one end of the second clamping rod is fixedly installed with a gear. The inner wall of the first drill rod body is slidably connected with a tooth plate, and the tooth plate and the teeth of the gear are meshed with each other. The surfaces of the first clamping rod and the second clamping rod are used in coordination.

[0013] Preferably, a sliding groove is provided on the surface of the first clamping rod, a sliding block is fixedly mounted on the surface of the second clamping rod, and the surface of the sliding block is slidably connected to the inner cavity of the sliding groove.

[0014] Preferably, a limiting plate is fixedly mounted on the surface of the second clamping rod, and the bottom of the limiting plate contacts the inner wall of the placement hole.

[0015] Preferably, a guide groove is provided on the inner wall of the placement hole, a guide block is fixedly mounted on the top of the tooth plate, and the surface of the guide block is slidably connected to the inner cavity of the guide groove.

[0016] Preferably, a spring is fixedly provided on the inner wall of the placement hole, one end of the spring is fixedly connected to the inner wall of the placement hole, the other end of the spring is fixedly connected to the surface of the tooth plate, and one end of the tooth plate is used in conjunction with the inner wall of the threaded sleeve.

[0017] Preferably, a docking groove is formed on the top of the clamping block, a docking block is fixedly mounted on the surface of the first drill rod body, and the surface of the docking block is slidably connected to the inner cavity of the docking groove.

[0018] Preferably, the anti-slip unit includes an extension plate, which is rotatably connected to the inner wall of the first drill rod body, and the inner wall of the extension plate is slidably connected to a positioning rod. A positioning groove is provided at one end of the threaded sleeve, and the inner cavity of the positioning groove is slidably connected to the surface of the positioning rod. The inner wall of the threaded sleeve is threadedly connected to a fixing rod, and one end of the fixing rod is threadedly connected to the surface of the positioning rod.

[0019] Preferably, a stopper is fixedly mounted on one end of the positioning rod, and the bottom of the stopper cooperates with the top of the extension plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention realizes greater torque and axial pressure transmission by setting a clamping mechanism and a spline shaft and spline groove connection mode, and realizes axial tension transmission structure by connecting the freely movable screw sleeve with the external thread, thereby solving the engineering drilling drill rod that people urgently need in engineering practice. The present invention has a reasonable structure, is strong and durable, is easy to connect, is widely used, and is more conducive to actual construction needs.

[0022] 2. The present invention provides a connecting unit. When the threaded sleeve is tightened and wrapped around the first drill rod body, it not only provides basic fixing force through threaded connection, but also realizes additional locking through the interaction of the toothed plate, the gear, the first clamping rod and the second clamping rod. The connection between the first drill rod body and the second drill rod body is more firmly connected, and the separation between the first drill rod body and the second drill rod body is further avoided, which further increases the working stability.

[0023] 3. The present invention not only enhances the stability of the connection by setting an anti-slip unit, a combination of a positioning rod and a fixing rod, but also improves its anti-loosening ability. Even under high vibration or high torque conditions, this design can ensure the firmness of the connection, reduce potential dangers caused by loosening, and improve the efficiency of drilling operations. The stable connection ensures continuous and efficient operation during drilling, thereby improving the overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2It is a structural schematic diagram of the first drill rod body of the present invention;

[0026] Figure 3 is a schematic structural diagram of a second drill rod body of the present invention;

[0027] Figure 4 is a structural cross-sectional view of a first drill rod body of the present invention;

[0028] Figure 5 It is a structural cross-sectional view of the card block of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the threaded sleeve of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the positioning rod of the present invention.

[0031] In the figure: 1. first drill rod body; 2. anti-falling mechanism; 21. connecting unit; 2101. first clamping rod; 2102. placement hole; 2103. second clamping rod; 2104. gear; 2105. tooth plate; 2106. sliding groove; 2107. sliding block; 2108. limiting plate; 2109. guide groove; 2110. guide block; 2111. spring; 2112. docking groove; 2113. docking block; 22. anti-slip unit; 2201. extension plate; 2202. positioning rod; 2203. positioning groove; 2204. fixing rod; 2205. stopper; 3. clamping mechanism; 301. spline shaft; 302. clamping block; 303. spline groove; 304. threaded body; 305. threaded sleeve; 4. second drill rod body. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments 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.

[0033] Example 1: Please refer to Figure 1-Figure 7 The present invention provides a technical solution: a threaded drill rod for construction that can rotate forward and backward, comprising a first drill rod body 1 and a second drill rod body 4, and an anti-falling mechanism 2 is provided on the surface of the first drill rod;

[0034] A clamping mechanism 3 is provided on the surface of the first drill rod body 1, and the clamping mechanism 3 is used to realize the rotation of the drill rod in forward and reverse directions.

[0035] As a further limitation of the clamping mechanism 3 of the present invention, the clamping mechanism 3 includes a spline shaft 301, which is fixedly installed on one end of the first drill rod body 1, and a clamping block 302 is fixedly installed on one end of the second drill rod body 4. The inner cavity of the clamping block 302 is provided with a spline groove 303, and the inner cavity of the spline groove 303 is slidably connected to the surface of the spline shaft 301. A threaded body 304 is fixedly installed on the surface of the first drill rod, and a threaded sleeve 305 is slidably connected to the surface of the second drill rod, and the inner cavity of the threaded sleeve 305 is threadedly connected to the surface of the threaded body 304. By setting the clamping mechanism 3, the spline shaft 301 and the spline groove 303 are connected in a manner to achieve greater torque and transmit axial pressure, and the structure is connected with the freely movable screw sleeve and the external thread to achieve the structure of transmitting axial tension, which effectively solves the engineering drilling drill rod that people urgently need in engineering practice. It has a reasonable structure, is strong and durable, is easy to connect, and is widely used, which is more conducive to actual construction needs.

[0036] The specific implementation of this embodiment is as follows: insert the spline shaft 301 into the inner cavity of the spline groove 303, and pass the threaded sleeve 305 through the second drill rod body 4, and rotate the threaded sleeve 305 to thread the threaded sleeve 305 and the threaded body 304, thereby realizing the connection between the first drill rod body 1 and the second drill rod body 4. When the second drill rod rotates, the first drill rod body 1 can be driven to rotate regardless of forward drilling or reverse drilling, thus realizing the actual requirement that both forward drilling and reverse drilling can be performed without being disassembled at the drill rod joint connection.

[0037] Example 2: Please refer to Figure 1-Figure 7 The present invention provides a technical solution: a threaded drill rod that can rotate forward and backward for construction. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The anti-falling mechanism 2 includes a connecting unit 21, which is arranged on the surface of the first drill rod body 1. The connecting unit 21 is used to increase the stability between the first drill rod body 1 and the second drill rod body 4.

[0038] As a further limitation of the anti-falling mechanism 2 of the present invention, the connecting unit 21 includes a first clamping rod 2101, which is fixedly installed in the inner cavity of the spline groove 303. A placement hole 2102 is opened inside the first drill rod body 1, and the inner cavity of the placement hole 2102 is rotatably connected to the second clamping rod 2103. The first end of the second clamping rod 2103 passes through the inner cavity of the spline shaft 301, and one end of the second clamping rod 2103 is fixedly installed with a gear 2104. The inner wall of the first drill rod body 1 is slidably connected with a tooth plate 2105, and the tooth plate 2105 and the gear 2104 are connected. The teeth are meshed with each other, and the surfaces of the first clamping rod 2101 and the second clamping rod 2103 are used in conjunction with each other. By setting the connecting unit 21, when the threaded sleeve 305 is tightened and wrapped around the first drill rod body 1, it not only provides basic fixing force through threaded connection, but also realizes additional locking through the interaction of the tooth plate 2105, the gear 2104, the first clamping rod 2101 and the second clamping rod 2103. The connection between the first drill rod body 1 and the second drill rod body 4 is more firmly connected, further avoiding separation between the first drill rod body 1 and the second drill rod body 4, and further increasing the stability of the work.

[0039] A sliding groove 2106 is provided on the surface of the first card rod 2101, and a sliding block 2107 is fixedly installed on the surface of the second card rod 2103. The surface of the sliding block 2107 is slidably connected to the inner cavity of the sliding groove 2106. Through the sliding connection between the sliding groove 2106 and the sliding block 2107, when the first card rod 2101 contacts the second card rod 2103, the sliding block 2107 will enter the inner cavity of the sliding groove 2106. The sliding groove 2106 is arc-shaped, and the sliding block enters the inner cavity of the sliding groove 2106, which can avoid the shaking and separation between the first card rod 2101 and the second card rod 2103, thereby ensuring the stability of the two after contact.

[0040] A limiting plate 2108 is fixedly installed on the surface of the second clamping rod 2103, and the bottom of the limiting plate 2108 contacts the inner wall of the placement hole 2102. By setting the limiting plate 2108, the moving distance of the second clamping rod 2103 can be limited to avoid the second clamping rod 2103 from moving.

[0041] A guide groove 2109 is provided on the inner wall of the placement hole 2102, and a guide block 2110 is fixedly installed on the top of the tooth plate 2105. The surface of the guide block 2110 is slidably connected to the inner cavity of the guide groove 2109. Through the sliding connection between the guide groove 2109 and the guide block 2110, the movement of the tooth plate 2105 can be guided, so that the tooth plate 2105 can move horizontally.

[0042] A spring 2111 is fixedly provided on the inner wall of the placement hole 2102, one end of the spring 2111 is fixedly connected to the inner wall of the placement hole 2102, and the other end of the spring 2111 is fixedly connected to the surface of the tooth plate 2105. One end of the tooth plate 2105 is used in conjunction with the inner wall of the threaded sleeve 305. By setting the spring 2111, when the tooth plate 2105 slides toward the inner cavity of the placement hole 2102, the spring 2111 can be reset. When the user removes the threaded sleeve 305, under the reaction force of the spring 2111, the tooth plate 2105 can be moved to the outside of the first drill rod body 1, thereby realizing the separation of the first clamping rod 2101 and the second clamping rod 2103, which is convenient for the user to separate the first drill rod body 1 from the second drill rod body 4.

[0043] A docking groove 2112 is provided on the top of the clamping block 302, and a docking block 2113 is fixedly installed on the surface of the first drill rod body 1. The surface of the docking block 2113 is slidably connected to the inner cavity of the docking groove 2112. The sliding connection between the docking groove 2112 and the docking block 2113 can facilitate more accurate docking of the spline shaft 301 and the spline groove 303, ensuring that the initial state of the first clamping rod 2101 and the second clamping rod 2103 is a separated state, and at the same time ensuring that the second clamping rod 2103 can be connected to the first clamping rod 2101 after rotating 90 degrees.

[0044] The specific implementation of this embodiment is as follows: when the threaded sleeve 305 wraps the first drill rod body 1, the inner wall of the threaded sleeve 305 will squeeze the tooth plate 2105, causing the tooth plate 2105 to slide towards the inner cavity of the placement hole 2102. Due to the mutual engagement of the gear 2104 and the tooth plate 2105, the gear 2104 will rotate during the movement of the tooth plate 2105. When one end of the tooth plate 2105 coincides with the surface of the first drill rod body 1, the tooth plate 2105 can stop moving, so that the tooth plate 2105 drives the gear 2104 to rotate 90 degrees, and the second clamping rod 2103 can rotate 90 degrees. Since the first clamping rod 2101 and the second clamping rod 2103 are both L-shaped, the surface of the first clamping rod 2101 can be in contact with the surface of the second clamping rod 2103, thereby realizing the connection between the first clamping rod 2101 and the second clamping rod 2103, thereby further improving the stability of the first drill rod body 1 and the second drill rod body 4 after connection.

[0045] Example 3: Please refer to Figure 1-Figure 7 The present invention provides a technical solution: a threaded drill rod that can rotate forward and backward for construction. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The anti-falling mechanism 2 also includes an anti-slip unit 22, which is arranged on the surface of the first drill rod body 1. The anti-slip unit 22 is used to prevent the clamping mechanism 3 from separating.

[0046] As a further limitation of the anti-fall mechanism 2 of the present invention, the anti-skid unit 22 includes an extension plate 2201, which is rotatably connected to the inner wall of the first drill rod body 1, and the inner wall of the extension plate 2201 is slidably connected with a positioning rod 2202. A positioning groove 2203 is provided at one end of the threaded sleeve 305, and the inner cavity of the positioning groove 2203 is slidably connected to the surface of the positioning rod 2202. The inner wall of the threaded sleeve 305 is threadedly connected with a fixing rod 2204, and one end of the fixing rod 2204 is threadedly connected to the surface of the positioning rod 2202. By setting the anti-skid unit 22, the combination of the positioning rod 2202 and the fixing rod 2204 not only enhances the stability of the connection, but also improves its anti-loosening ability. Even under high vibration or high torque conditions, this design can ensure the firmness of the connection, reduce the potential dangers caused by loosening, and improve the efficiency of drilling operations. The stable connection ensures continuous and efficient work during drilling, thereby improving the overall operation efficiency.

[0047] A stopper 2205 is fixedly installed at one end of the positioning rod 2202, and the bottom of the stopper 2205 cooperates with the top of the extension plate 2201. By setting the stopper 2205, the moving distance of the moving plate of the stopper 2205 can be limited, thereby achieving accurate threaded connection between the positioning rod 2202 and the fixed rod 2204.

[0048] The specific implementation of this embodiment is as follows: after the threaded sleeve 305 realizes the connection between the first drill rod body 1 and the second drill rod body 4, the positioning rod 2202 is inserted into the inner cavity of the positioning groove 2203, and the extension plate 2201 is rotated on the surface of the first drill rod body 1, which can facilitate the inner cavity of the positioning groove 2203 to coincide with the opening of the extension plate 2201. After the positioning rod 2202 enters the inner cavity of the positioning groove 2203, the position of the positioning rod 2202 is fixed by the fixing rod 2204, thereby fixing the position of the threaded sleeve 305, avoiding the thread slippage phenomenon of the threaded sleeve 305 and causing separation, and further improving the stability of the first drill rod body 1 and the second drill rod body 4 after connection.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction-use threaded drill rod capable of forward and reverse rotation, comprising a first drill rod body (1) and a second drill rod body (4), characterized in that: The surface of the first drill rod is provided with an anti-falling mechanism (2); A clamping mechanism (3) is provided on the surface of the first drill rod body (1), and the clamping mechanism (3) is used to realize rotation of the drill rod in forward and reverse directions; The anti-falling mechanism (2) comprises a connecting unit (21), wherein the connecting unit (21) is arranged on the surface of the first drill rod body (1), and the connecting unit (21) is used to increase the stability between the first drill rod body (1) and the second drill rod body (4); The anti-falling mechanism (2) further comprises an anti-slip unit (22), wherein the anti-slip unit (22) is arranged on the surface of the first drill rod body (1), and the anti-slip unit (22) is used to prevent the clamping mechanism (3) from being separated.

2. A construction-use threaded drill rod capable of forward and reverse rotation according to claim 1, characterized in that: The clamping mechanism (3) comprises a spline shaft (301), the spline shaft (301) being fixedly mounted on one end of a first drill rod body (1), a clamping block (302) being fixedly mounted on one end of the second drill rod body (4), a spline groove (303) being provided in an inner cavity of the clamping block (302), the inner cavity of the spline groove (303) being slidably connected to the surface of the spline shaft (301), a threaded body (304) being fixedly mounted on the surface of the first drill rod, a threaded sleeve (305) being slidably connected to the surface of the second drill rod, and the inner cavity of the threaded sleeve (305) being threadedly connected to the surface of the threaded body (304).

3. The threaded drill rod for construction that can rotate forward and backward according to claim 2, characterized in that: The connecting unit (21) comprises a first clamping rod (2101), the first clamping rod (2101) being fixedly mounted in the inner cavity of the spline groove (303), a placement hole (2102) being provided inside the first drill rod body (1), the inner cavity of the placement hole (2102) being rotatably connected to a second clamping rod (2103), a first end of the second clamping rod (2103) passing through the inner cavity of the spline shaft (301), a gear (2104) being fixedly mounted on one end of the second clamping rod (2103), a tooth plate (2105) being slidably connected to the inner wall of the first drill rod body (1), the teeth of the tooth plate (2105) and the gear (2104) being meshed with each other, and the surfaces of the first clamping rod (2101) and the second clamping rod (2103) being used in coordination with each other.

4. The threaded drill rod for construction that can rotate forward and backward according to claim 3 is characterized by: A sliding groove (2106) is provided on the surface of the first clamping rod (2101), and a sliding block (2107) is fixedly mounted on the surface of the second clamping rod (2103), wherein the surface of the sliding block (2107) is slidably connected to the inner cavity of the sliding groove (2106).

5. The threaded drill rod for construction that can rotate forward and backward according to claim 3, characterized in that: A limiting plate (2108) is fixedly mounted on the surface of the second clamping rod (2103), and the bottom of the limiting plate (2108) is in contact with the inner wall of the placement hole (2102).

6. The threaded drill rod for construction that can rotate forward and backward according to claim 3, characterized in that: The inner wall of the placement hole (2102) is provided with a guide groove (2109), and a guide block (2110) is fixedly mounted on the top of the tooth plate (2105), and the surface of the guide block (2110) is slidably connected to the inner cavity of the guide groove (2109).

7. The threaded drill rod for construction that can rotate forward and backward according to claim 3, characterized in that: A spring (2111) is fixedly provided on the inner wall of the placement hole (2102), one end of the spring (2111) is fixedly connected to the inner wall of the placement hole (2102), the other end of the spring (2111) is fixedly connected to the surface of the tooth plate (2105), and one end of the tooth plate (2105) is used in conjunction with the inner wall of the threaded sleeve (305).

8. The threaded drill rod for construction that can rotate forward and backward according to claim 2, characterized in that: A docking groove (2112) is provided on the top of the clamping block (302), a docking block (2113) is fixedly mounted on the surface of the first drill rod body (1), and the surface of the docking block (2113) is slidably connected to the inner cavity of the docking groove (2112).

9. The threaded drill rod for construction that can rotate forward and backward according to claim 2, characterized in that: The anti-slip unit (22) comprises an extension plate (2201), the extension plate (2201) being rotatably connected to the inner wall of the first drill rod body (1), the inner wall of the extension plate (2201) being slidably connected to a positioning rod (2202), one end of the threaded sleeve (305) being provided with a positioning groove (2203), the inner cavity of the positioning groove (2203) being slidably connected to the surface of the positioning rod (2202), the inner wall of the threaded sleeve (305) and one end of the fixing rod (2204) being provided with threaded holes, and the positioning rod (2202) being provided with a threaded hole to fix the threaded sleeve (305) and the fixing rod (2204).

10. The threaded drill rod for construction that can rotate forward and backward according to claim 9, characterized in that: A stopper (2205) is fixedly mounted on one end of the positioning rod (2202), and the bottom of the stopper (2205) cooperates with the top of the extension plate (2201).

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