Rotary power head of pre-tightening taper clamping structure

Abstract

The utility model discloses a rotary power head of a pre-tightening taper clamping structure. Which comprises a power head body, a taper clamping structure is arranged in the power head body, the action of pressing and clamping a drill rod is achieved through axial movement of a taper sleeve, and the power head is characterized in that a disc spring is arranged on the axial movement axis of the taper sleeve, and a clamping device loosens the drill rod by compressing the disc spring through thrust of an oil cylinder; after the thrust of the oil cylinder is removed, the drill rod is clamped by the thrust generated by the pre-compression amount of the disc spring, and meanwhile, the clamping device can transmit the torque of the power head; therefore, in the clamping process of the power head, the pre-tightening force is always kept, and shaking of the drill rod can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a rotary power head for clamping a drill rod in a drilling rig, in particular to a rotary power head with a pre-tightened taper clamping structure. Background Art

[0002] During the working process of the drilling rig, the rotary power head (hereinafter referred to as the power head) is generally used. Figure 2 ) to hold the drill rod tightly, and then the drill rod is rotated by the rotation of the rotary power head itself, and then combined with the downward pressure process, the drilling tool can open a hole in the ground.

[0003] In the above process, the power head, as a key device that connects to the drill pipe and transmits torque, has been found to have some problems during long-term use:

[0004] 1. The clamping method using motor drive and internal or external gear rack meshing may cause excessive clamping force, which may damage the drill pipe surface.

[0005] 2. When the clamping method uses a hydraulic cylinder to drive and internal taper compression, it is difficult to generate impact force when the drill rod needs to be removed, so that the clamping mechanism inside the entire power head is locked, which either makes it difficult to remove the drill rod or causes a gap between the drill rod and the clamping mechanism, making it impossible to fully clamp. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned defects and, based on the premise of a rotary power head driven by a hydraulic cylinder and compacted by an internal taper, propose a rotary power head that uses disc springs for clamping.

[0007] In order to achieve the above object, the utility model is achieved as follows:

[0008] A rotary power head with a pre-tightened tapered clamping structure includes a power head body, the interior of which has a tapered clamping structure, which realizes the action of pressing and holding the drill rod through the axial movement of the tapered sleeve and the cone core, and also includes a disc spring, which is arranged on the axis of the axial movement of the tapered sleeve and the cone core, and the reverse force generated by the pre-compression of the disc spring pushes the tapered sleeve to realize the function of clamping the drill rod.

[0009] The rotary power head with the pre-tightened taper clamping structure is provided with a thrust cylinder outside the power head body. The thrust cylinder is used to provide power to move the taper sleeve inside the power head body to realize the function of loosening the power head.

[0010] The rotary power head with the pre-tightened tapered clamping structure has a disc spring arranged inside the power head body, one end of which is connected to the top plate inside the power head body, and the other end is connected to the bottom plate inside the power head body or the disc spring base arranged inside the power head body.

[0011] As we all know, in the clamping method of the cone sleeve, when the two need to be separated, additional impact force needs to be provided to loosen them. However, the current traditional drill tools that use the taper matching principle to achieve clamping usually require impact force to the power head before the drill rod can be removed. Such operation will inevitably damage the motor, bearings and other components on the power head. In the long run, there will be a gap in the power head, resulting in circumferential runout of the drill rod.

[0012] The present invention provides a disc spring in the tapered clamping mechanism of the power head. In this way, when the hydraulic cylinder releases the pressure, the disc spring will quickly return to a relaxed state from a compressed state. The resulting impact force will cause the tapered clamping mechanism in the power head body to loosen, thereby facilitating the removal of the drill rod. In this way, there is no need to apply additional impact force to the power head, thereby avoiding premature damage to the slewing support of the power head. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural comparison diagram of the power head shown in the utility model and the traditional power head.

[0014] Figure 2 This is the appearance sample picture of the power head. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection requested by this application.

[0016] like Figure 1 A rotary power head with a pre-tightened tapered clamping structure includes a power head body 1, the interior of the power head body 1 has a tapered clamping structure 2, the tapered clamping structure 2 includes a tapered sleeve 4 and a tapered core 5, and the axial movement of the tapered sleeve 4 and the tapered core 5 realizes the action of pressing and holding the drill rod. It also includes a disc spring 3, and the disc spring 3 is arranged on the axis of the axial movement of the tapered sleeve 4 and the tapered core 5. The reverse force generated by the pre-compression of the disc spring 3 pushes the tapered sleeve 4 to realize the function of clamping the drill rod.

[0017] The rotary power head with the pre-tightened taper clamping structure is provided with a thrust cylinder 6 outside the power head body 1. The thrust cylinder 6 is used to provide power to move the taper sleeve 4 inside the power head body 1 to loosen the power head.

[0018] The rotary power head with the pre-tightened tapered clamping structure has a disc spring 3 arranged inside the power head body, one end of which is connected to the top plate inside the power head body, and the other end is connected to the bottom plate inside the power head body or the disc spring base arranged inside the power head body.

[0019] The utility model arranges a disc spring in the tapered clamping mechanism of the power head. In this way, when the hydraulic cylinder releases the pressure, the disc spring will quickly return to a relaxed state from a compressed state. The resulting impact force will cause the tapered clamping mechanism in the power head body to loosen due to the impact force, thereby facilitating the removal of the drill rod. In this way, there is no need to apply additional impact force to the power head, thereby avoiding premature damage to the slewing support of the power head.

[0020] The above are only embodiments provided for this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A rotary power head with a pre-tightened tapered clamping structure, comprising a power head body, wherein the interior of the power head body has a tapered clamping structure, and the drill pipe is pressed and clamped by the axial movement of the taper sleeve, wherein: It also includes a disc spring, which is arranged on the axis of axial movement of the cone sleeve and the cone core. The reverse force generated by the pre-compression of the disc spring pushes the cone sleeve to achieve the function of clamping the drill rod.

2. The rotary power head with a pre-tightened taper clamping structure according to claim 1, characterized in that: A thrust oil cylinder is arranged outside the power head body, and the thrust oil cylinder is used to provide power to move the cone sleeve inside the power head body to realize the function of loosening the power head.

3. The rotary power head with a pre-tightened taper clamping structure according to claim 2, characterized in that: The disc spring is arranged inside the power head body, one end of which is connected to the top plate inside the power head body, and the other end is connected to the bottom plate inside the power head body or the disc spring base arranged inside the power head body.

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