Clamp holder suitable for drilling machine

Abstract

The utility model provides a clamp holder suitable for a drilling machine. The clamp holder comprises a hydraulic oil cylinder, a slip bowl and a slip, the slip bowl is connected with the end part of a piston rod of the hydraulic oil cylinder; the slips are quick-wear parts directly making contact with a drill rod, at least one pair of slips are arranged on the same slip bowl, the slips are distributed obliquely upwards and obliquely downwards, a plurality of connecting grooves are formed in the clamping face of the slip bowl, and the direction of the clamping face is correspondingly consistent with the arrangement angle of the slips. The back face of the slip is provided with a connecting block corresponding to the connecting groove, and the connecting block is connected with the connecting groove. Clamping force is provided in a hydraulic oil cylinder driving mode, the slips installed on the slip bowl can clamp and fix a drill rod in multiple directions, the clamping stability degree is improved, and it is guaranteed that braking is rapid and reliable; meanwhile, a connection mode convenient to assemble and disassemble is adopted, so that quick-wear parts such as slips and the like can be quickly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of pile hole drilling rigs, in particular to a clamp suitable for drilling rigs. Background Art

[0002] A pile hole drilling rig is a special mechanical equipment widely used in the construction of water wells and pile holes. It is widely used in the construction of water wells in water-scarce areas, the drilling of air-conditioning wells in ground-source heat pump technology, and the construction of pile holes for high-rise building foundations and bridge foundations in urban construction. The pile hole drilling rig converts the liquid energy generated by the power source into mechanical energy, and transmits the resulting torque, rotation speed and pressurization capacity to the drill rod, so that the drill rod can obtain the drilling speed, torque and feed capacity required for cutting. When the drill rod needs to brake and stop suddenly, it is necessary to cut off the transmission of torque, etc., and rely on a specific clamp to clamp the drill rod so that the drill rod can brake and stop suddenly. The clamping structure in the existing technology has a poor clamping effect on the drill rod and cannot well guarantee the effect of the drill rod braking and stopping, especially after long-term use. At the same time, it is not very convenient to replace wearing parts. Utility Model Content

[0003] The purpose of the utility model is to provide a clamping device with good clamping effect and convenient replacement of wearing parts in response to the shortcomings of the above-mentioned background technology.

[0004] In order to achieve the above-mentioned object, the utility model provides a clamp suitable for a drilling rig, comprising a hydraulic cylinder, a slip seat and slips;

[0005] The slip seat is connected to the end of the piston rod of the hydraulic cylinder;

[0006] The slips are wearing parts that are in direct contact with the drill pipe. At least one pair of slips are arranged on the same slip seat, and the directions are respectively distributed obliquely upward and obliquely downward. The clamping surface of the slip seat is provided with multiple connecting grooves, and the direction of the clamping surface corresponds to the setting angle of the slips. The back of the slip is provided with a connecting block corresponding to the connecting groove, and the connecting block is connected to the connecting groove.

[0007] Furthermore, the connecting block and the connecting groove are both configured as a dovetail shape.

[0008] Furthermore, a piston hole is provided on the back of the cava seat, and the end of the piston rod of the hydraulic cylinder is inserted into the piston hole. The cava seat is provided with a first connecting hole, and the end of the piston rod is provided with a bolt through-hole corresponding to the first connecting hole, and the installation bolt is inserted from the first connecting hole and connected through the bolt through-hole.

[0009] Furthermore, a second connecting hole is provided on the slip seat, and an internal thread corresponding to the second connecting hole is provided at the end of the piston rod, which is connected by installing bolts.

[0010] Furthermore, a plurality of threaded holes are provided on the side surface of the slip seat, and the threaded holes are used to install a limiting plate, and the limiting plate is used to limit the two sides of the connecting groove.

[0011] Furthermore, the slips are configured as a rectangular block structure as a whole, the connecting blocks are arranged on the back side of the slips, and the front side of the slips is a supporting surface in contact with the drill rod.

[0012] Furthermore, a tooth-like structure is provided on the front side of the slip.

[0013] The above solution of the utility model has the following beneficial effects:

[0014] The clamp provided by the utility model is suitable for drilling rigs and provides clamping force by means of a hydraulic cylinder drive. The slips installed on the slip seat can clamp and fix the drill rod from multiple directions, thereby improving the clamping stability and ensuring fast and reliable braking. At the same time, the slips and the slip seat, as well as the slip seat and the hydraulic cylinder, adopt a connection method that is convenient for assembly and disassembly, so that slips and other wearing parts can be quickly replaced, further improving the efficiency of equipment maintenance and reuse.

[0015] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is another schematic diagram of the overall structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the slip seat of the utility model;

[0019] Figure 4 This is a schematic diagram of the slips of the present invention.

[0020] [Description of Reference Numerals]

[0021] 1-Hydraulic cylinder; 2-Slip seat; 3-Slip; 4-Connecting groove; 5-Connecting block; 6-Piston hole; 7-First connecting hole; 8-Mounting bolt; 9-Second connecting hole; 10-Threaded hole; 11-Limiting plate; 12-Tooth structure. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a locking connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1-Figure 4 As shown, an embodiment of the present invention provides a clamp for a drilling rig, comprising a hydraulic cylinder 1, a slip holder 2, and slips 3. The slip holder 2 is connected to the piston rod end of the hydraulic cylinder 1. The hydraulic cylinder 1 controls the position of the slip holder 2 to clamp or release the drill pipe, while also adjusting the clamping force based on the hydraulic pressure. The slips 3 (i.e., the chuck) are consumable parts that directly contact the drill pipe. The slips 3 are detachably connected to the slip holder 2 for easy replacement.

[0026] In this embodiment, a pair of slips 3 are provided on the same slip holder 2, oriented diagonally upward and downward, respectively. This allows for clamping force to be applied to the drill pipe from two angles. During installation, the opposing arrangement of the two grippers, i.e., the two pairs of slips 3, clamp the drill pipe from four directions, ensuring a secure grip both horizontally and vertically. This ensures sufficient clamping force without causing uneven force on the drill pipe, which can cause shaking.

[0027] In this embodiment, the clamping surface of the slip seat 2 is provided with two connecting grooves 4. The orientation of the clamping surface aligns with the angle of the two slips 3. The back of the slip 3 is provided with a connecting block 5 corresponding to the connecting groove 4. To facilitate replacement, this embodiment employs a direct connection between the connecting block 5 and the connecting groove 4, either through an interference fit or by using an elastic material and clamping the connecting block 5.

[0028] As a preferred embodiment, the connection block 5 and the connection groove 4 in this embodiment are both configured as dovetail shapes. During installation, the connection block 5 can be inserted from one end of the connection groove 4. Once in place, the connection block 5 will not move out of the normal direction of the clamping surface. Since the reaction force during clamping is also applied in the normal direction, this ensures that the slips 3 are securely connected (the movement direction of the connection groove 4 is fixed by an interference fit or elastic force). Of course, in other embodiments, the connection block 5 and the connection groove 4 can also be configured as an inverted T-shape, etc., which can also achieve the above-mentioned effect.

[0029] In this embodiment, the back of the slip seat 2 is further provided with a piston hole 6 for inserting the end of the piston rod of the hydraulic cylinder 1. The slip seat 2 is also provided with a first connection hole 7, and the end of the piston rod is also provided with a bolt through-hole corresponding to the first connection hole 7. The slip seat 2 is connected to the piston rod of the hydraulic cylinder by inserting the mounting bolt 8 through the first connection hole and the bolt through-hole. Furthermore, the slip seat 2 is further provided with a second connection hole 9, and the end of the piston rod is provided with an internal thread corresponding to the second connection hole 9. The mounting bolt 8 is inserted through the second connection hole 9 and connected to the internal thread, thereby further improving the firmness of the connection between the slip seat 2 and the end of the piston rod.

[0030] As a preferred embodiment, the side of the slip seat 2 in this embodiment is further provided with a plurality of threaded holes 10, which are used to install limiting plates 11. The limiting plates 11 can limit the two sides of the connecting groove 4 so that the connecting block 5 is completely restrained in the connecting groove 4. This method can further improve the convenience of installation, and there is no need to deform the connecting block 5 before inserting it into the connecting groove 4.

[0031] As a preferred embodiment, the slips 3 are configured as a rectangular block structure in this embodiment, with the connecting block 5 located on the back of the slips 3. Furthermore, the front of the slips 3 is formed with tooth-like structures 12. These teeth 12 further enhance friction with the drill pipe surface, thereby further improving the braking effect. It should be noted that the teeth 12 require quenching after manufacture to extend their service life.

[0032] In summary, the clamp suitable for the drilling rig provided in this embodiment provides clamping force by being driven by a hydraulic cylinder. The cava 3 installed on the cava seat 2 can clamp and fix the drill rod from multiple directions, thereby improving the clamping stability and ensuring fast and reliable braking. At the same time, the cava 3 and the cava seat 2, and the cava seat 2 and the hydraulic cylinder 1 all adopt a connection method that is convenient for loading and unloading, so that wearing parts such as the cava 3 can be quickly replaced, further improving the efficiency of equipment maintenance and reuse.

[0033] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A clamp suitable for a drilling rig, characterized in that: Including hydraulic cylinder, slip seat and slip; The slip seat is connected to the end of the piston rod of the hydraulic cylinder; The slips are wearing parts that are in direct contact with the drill pipe. At least one pair of slips are arranged on the same slip seat, and the directions are respectively distributed obliquely upward and obliquely downward. The clamping surface of the slip seat is provided with multiple connecting grooves, and the direction of the clamping surface corresponds to the setting angle of the slips. The back of the slip is provided with a connecting block corresponding to the connecting groove, and the connecting block is connected to the connecting groove.

2. A clamp suitable for a drilling rig according to claim 1, characterized in that: The connecting block and the connecting groove are both configured in a dovetail shape.

3. The clamp suitable for a drilling rig according to claim 1, characterized in that: A piston hole is also provided on the back of the cava seat, and the end of the piston rod of the hydraulic cylinder is inserted into the piston hole. The cava seat is provided with a first connecting hole, and the end of the piston rod is provided with a bolt through-hole corresponding to the first connecting hole, and the installation bolt is inserted from the first connecting hole and passed through the bolt through-hole for connection.

4. The clamp suitable for a drilling rig according to claim 1, characterized in that: The slip seat is further provided with a second connecting hole, and the end of the piston rod is provided with an internal thread corresponding to the second connecting hole, which is connected by installing bolts.

5. The clamp suitable for a drilling rig according to claim 1, characterized in that: The side surface of the slip seat is further provided with a plurality of threaded holes, and the threaded holes are used for installing a limiting plate, and the limiting plate is used for limiting the two sides of the connecting groove.

6. The clamp suitable for a drilling rig according to claim 1, characterized in that: The slips are generally configured as a rectangular block structure, the connecting blocks are arranged on the back side of the slips, and the front side of the slips is a supporting surface in contact with the drill rod.

7. The clamp suitable for a drilling rig according to claim 6, characterized in that: The front side of the slip is also provided with a tooth structure.

Images