A connecting and fixing device for a silent rotary drilling machine drill bit and a power head

Abstract

The present invention provides a connection and fixing device for a silent rotary drilling machine drill bit and a power head, comprising a middle tube arranged between the power head and the rotary drilling bit, a connecting tube installed on the power head and a pin hydraulic cylinder installed in the middle tube, wherein the connecting tube is arranged in the middle tube; a plurality of connecting plates are arranged on the connecting tube, positioning holes are arranged on the connecting plates, and a connecting piece corresponding to the connecting plate is fixed on the rotary drilling bit. The present invention adopts the above structure, when the silent rotary drilling bit is unloading soil, when the rotary drilling bit rises to make the connecting plate on the connecting tube enter the movable hole of the connecting piece, and the movable hole is located within the range of the key hole, the pin shaft can be driven to the first position by the pin hydraulic cylinder, so that the connecting tube is connected with the connecting piece, at this time, the thrust generated by unloading soil will act on the power head through the connecting tube, the connecting piece and the pin shaft, and the wire rope is in a stress-free state when unloading soil, so as to protect the service life of the wire rope and the winch, and prevent the wire rope from breaking, so as to ensure the safe production when the rotary drilling machine is working, greatly reduce the occurrence of safety accidents and maintenance costs, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rotary drilling machine drill bits, and in particular to a connection and fixing device for a silent rotary drilling machine drill bit and a power head. Background Art

[0002] In the existing rotary drilling rig, the rotary drilling rig utilizes a power head to drive the drill rod connected to it to rotate, so that the rotary drilling rig shovels the soil into the drill barrel through the rotational force. After working for a period of time, the drill bit is lifted to the ground level and the drill bit at the bottom is loosened. The soil in the rotary drilling barrel needs to be cleaned out. The lifting and lowering of the rotary drilling rig is generally coordinated by a wire rope connected to the drill rod and a winch. For example, patent No. CN202311019638.5 discloses a silent rotary drilling rig drill bit, which is connected to a soil unloading push plate arranged in the drill barrel through the output end of the hydraulic cylinder, and the soil unloading push plate is driven to rise and fall in the drill barrel by the hydraulic cylinder to achieve the function of unloading soil.

[0003] However, when a traditional silent drill is unloading soil, the force of pushing soil will act on the rotary drilling bit. At this time, the wire rope not only needs to bear the weight of the rotary drilling bit and the drill rod, but also needs to bear the force of the hydraulic cylinder pushing soil. When the thrust of the hydraulic cylinder gradually increases to exceed the bearing capacity of the wire rope, this will easily cause the wire rope to break, affecting the subsequent work of the rotary drilling rig and leading to an increase in subsequent maintenance costs. Summary of the invention

[0004] The invention discloses a connection and fixing device for a silent rotary drilling rig drill bit and a power head, mainly solving the problem that when the thrust of a hydraulic cylinder of a traditional silent rotary drilling rig drill bit is increased to exceed the bearing capacity of a steel wire rope during soil unloading, the steel wire rope is easily disconnected.

[0005] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0006] The present invention provides a connection and fixing device for a silent rotary drilling machine drill bit and a power head, comprising a middle cylinder arranged between the power head and the rotary drilling drill bit, a connecting cylinder installed on the power head, and a latch hydraulic cylinder installed in the middle cylinder, wherein the connecting cylinder is arranged in the middle cylinder;

[0007] The connecting tube is provided with a plurality of connecting plates, the connecting plates are provided with positioning holes, and the rotary drilling drill bit is fixed with connecting pieces corresponding to the connecting plates;

[0008] The connecting piece comprises a connecting seat welded to the rotary drilling bit, the connecting seat is provided with a movable hole matching with the connecting plate so as to allow the connecting plate to enter and exit the movable hole, the side of the connecting seat is provided with a key hole communicating with the movable hole, and the positioning hole is placed in the key hole;

[0009] The output end of the latch hydraulic cylinder is provided with a pin shaft, so that the pin shaft has a first position and a second position;

[0010] When the pin shaft is located at the first position, the pin hydraulic cylinder drives the pin shaft to pass through the key hole and the positioning hole in sequence;

[0011] When the pin shaft is located at the second position, the pin latch hydraulic cylinder drives the pin shaft to disengage from the key hole and the positioning hole.

[0012] In one embodiment, the key hole passes through two side surfaces of the connecting seat, so that when the pin shaft is located at the first position, the latch hydraulic cylinder drives the pin shaft to pass through the key hole, the positioning hole and the key hole in sequence.

[0013] In one embodiment, a welding hole is penetrated at a position of the rotary drill bit corresponding to the connecting piece, and the connecting seat passes through the welding hole and is welded to the rotary drill bit.

[0014] In one embodiment, a connecting hole is transversely penetrated at one end of the connecting seat away from the power head, a connecting rod is welded in the connecting hole, and the connecting rod is welded to the rotary drilling bit.

[0015] In one embodiment, the length of the connecting rod is greater than the length of the welding hole.

[0016] In one embodiment, the output end of the latch hydraulic cylinder corresponds to the positioning hole.

[0017] The advantages or beneficial effects of the above technical solution include at least: when the rotary drilling bit needs to be unloaded, the rotary drilling bit is raised to the ground level by pulling the wire rope through the winch, so that the connecting plate on the connecting cylinder enters the movable hole of the connecting piece until the movable hole is within the range of the key hole, and the pin shaft can be driven to the first position by the latch hydraulic cylinder, that is, the pin shaft passes through the key hole and the positioning hole in turn, so that the connecting cylinder and the connecting piece can be connected. Since the connecting cylinder is installed on the power head and the connecting piece is welded to the rotary drilling bit, the unloading of soil occurs. The thrust will act on the power head through the connection of the connecting tube, the connecting piece and the pin shaft. The wire rope is in a stress-free state when unloading the soil, thereby protecting the service life of the wire rope and the winch and preventing the wire rope from breaking, so as to ensure the safe production of the rotary drilling rig during operation, greatly reduce the occurrence of safety accidents and maintenance costs, and improve production efficiency; when the rotary drilling bit is needed to dig the soil, it is only necessary to drive the pin shaft to the second position through the pin hydraulic cylinder, that is, to disengage the pin shaft from the key hole and the positioning hole, so that the power head and the rotary drilling bit can be separated for digging work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0019] Figure 1 A schematic diagram of a power head, a rotary drill bit and a middle barrel according to an exemplary embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of a power head, a rotary drill bit, a connecting tube, a connecting piece, and a latch hydraulic cylinder according to an exemplary embodiment of the present invention is shown;

[0021] Figure 3 An exploded schematic diagram of a rotary drilling bit, a connecting tube, a connecting piece, and a latch hydraulic cylinder according to an exemplary embodiment of the present invention is shown;

[0022] Figure 4 A schematic diagram showing a connecting cylinder according to an exemplary embodiment of the present invention is shown;

[0023] Figure 5 An exploded schematic diagram of a connector according to an exemplary embodiment of the present invention is shown.

[0024] Description of reference numerals:

[0025] 1. Power head;

[0026] 2. Rotary drilling bit;

[0027] 21. Welding holes;

[0028] 3. Middle tube;

[0029] 4. Connecting tube;

[0030] 41. connecting plate; 42. positioning hole;

[0031] 5. Connectors;

[0032] 51, connecting seat; 511, movable hole; 512, key hole; 513, connecting hole; 52, connecting rod;

[0033] 6. Latch hydraulic cylinder;

[0034] 7. Pin shaft. DETAILED DESCRIPTION

[0035] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0038] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0039] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0040] See also Figures 1 to 5 The embodiment of the present invention provides a connection and fixing device for a silent rotary drilling machine drill bit and a power head, comprising a middle cylinder 3 arranged between the power head 1 and the rotary drilling drill bit 2, a connecting cylinder 4 installed on the power head 1, and a latch hydraulic cylinder 6 installed in the middle cylinder 3, wherein the connecting cylinder 4 is arranged in the middle cylinder 3;

[0041] A plurality of connecting plates 41 are provided on the connecting tube 4, positioning holes 42 are provided on the connecting plates 41, and connecting pieces 5 corresponding to the connecting plates 41 are fixed on the rotary drilling drill bit 2;

[0042] The connecting member 5 includes a connecting seat 51 welded to the rotary drill bit 2, and a movable hole 511 matching with the connecting plate 41 is provided on the connecting seat 51, so that the connecting plate 41 can enter and exit the movable hole 511, and a key hole 512 communicating with the movable hole 511 is provided on the side of the connecting seat 51, and the positioning hole 42 is placed in the key hole 512;

[0043] The output end of the latch hydraulic cylinder 6 is provided with a pin shaft 7, so that the pin shaft 7 has a first position and a second position;

[0044] When the pin shaft 7 is located at the first position, the pin hydraulic cylinder 6 drives the pin shaft 7 to pass through the key hole 512 and the positioning hole 42 in sequence;

[0045] When the pin shaft 7 is located at the second position, the pin hydraulic cylinder 6 drives the pin shaft 7 to disengage from the key hole 512 and the positioning hole 42 .

[0046] With the above structure, when the rotary drilling bit 2 needs to be unloaded, the rotary drilling bit 2 is raised to the ground level by pulling the wire rope through the winch, so that the connecting plate 41 on the connecting tube 4 enters the movable hole 511 of the connecting member 5, until the movable hole 511 is within the range of the key hole 512, the pin shaft 7 can be driven to the first position by the latch hydraulic cylinder 6, that is, the pin shaft 7 passes through the key hole 512 and the positioning hole 42 in sequence, so that the connecting tube 4 can be connected to the connecting member 5. Since the connecting tube 4 is installed on the power head 1 and the connecting member 5 is welded to the rotary drilling bit 2, the unloading of soil is completed. The generated thrust will act on the power head 1 through the connection of the connecting tube 4, the connecting piece 5 and the pin shaft 7. The wire rope is in a stress-free state when unloading the soil, thereby protecting the service life of the wire rope and the winch and preventing the wire rope from breaking, so as to ensure the safe production of the rotary drilling rig during operation, greatly reduce the occurrence of safety accidents and maintenance costs, and improve production efficiency; when the rotary drilling bit 2 is needed to dig the soil, it is only necessary to drive the pin shaft 7 to the second position through the pin hydraulic cylinder 6, that is, to disengage the pin shaft 7 from the key hole 512 and the positioning hole 42, so that the power head 1 can be separated from the rotary drilling bit 2 for digging work.

[0047] In one embodiment, see Figure 2 , Figure 3 and Figure 5 The key hole 512 penetrates the two sides of the connection seat 51, so that when the pin shaft 7 is in the first position, the latch hydraulic cylinder 6 drives the pin shaft 7 to pass through the key hole 512, the positioning hole 42 and the key hole 512 in sequence. In actual use, the key hole 512 penetrates the two sides of the connection seat 51, so that the pin shaft 7 can pass through the connection seat 51, thereby increasing the contact area between the pin shaft 7 and the connection seat 51, thereby improving the stability of the connection.

[0048] In one embodiment, see Figures 2 to 5The position of the rotary drill bit 2 corresponding to the connecting piece 5 is penetrated with a welding hole 21, and the connecting seat 51 passes through the welding hole 21 and is welded to the rotary drill bit 2. In actual use, the setting of the welding hole 21 can facilitate the connecting seat 51 to pass through the rotary drill bit 2, and is conducive to the welding stability between the connecting seat 51 and the rotary drill bit 2.

[0049] A connecting hole 513 is formed transversely through one end of the connecting seat 51 away from the power head 1, and a connecting rod 52 is welded in the connecting hole 513, and the connecting rod 52 is welded to the rotary drilling bit 2. The length of the connecting rod 52 is greater than the length of the welding hole 21; in actual use, the connection rod 52 can improve the bearing capacity of the connecting seat 51 and the rotary drilling bit 2 after welding.

[0050] In one embodiment, see Figure 2 and Figure 3 , the output end of the latch hydraulic cylinder 6 corresponds to the positioning hole 42. In actual use, the position of the latch hydraulic cylinder 6 is set so that the latch hydraulic cylinder 6 can make the pin shaft 7 accurately pass through the positioning hole 42 when driving the pin shaft 7.

[0051] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0052] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A connection and fixing device for a silent rotary drilling machine drill bit and a power head, characterized in that: It comprises a middle cylinder arranged between the power head and the rotary drilling bit, a connecting cylinder installed on the power head and a latch hydraulic cylinder installed in the middle cylinder, wherein the connecting cylinder is arranged in the middle cylinder; The connecting tube is provided with a plurality of connecting plates, the connecting plates are provided with positioning holes, and the rotary drilling drill bit is fixed with connecting pieces corresponding to the connecting plates; The connecting piece comprises a connecting seat welded to the rotary drilling bit, the connecting seat is provided with a movable hole matching with the connecting plate so as to allow the connecting plate to enter and exit the movable hole, the side of the connecting seat is provided with a key hole communicating with the movable hole, and the positioning hole is placed in the key hole; The output end of the latch hydraulic cylinder is provided with a pin shaft, so that the pin shaft has a first position and a second position; When the pin shaft is located at the first position, the pin hydraulic cylinder drives the pin shaft to pass through the key hole and the positioning hole in sequence; When the pin shaft is located at the second position, the pin latch hydraulic cylinder drives the pin shaft to disengage from the key hole and the positioning hole.

2. The device for connecting and fixing the drill bit and the power head of a silent rotary drilling machine according to claim 1, characterized in that: The key hole passes through two side surfaces of the connecting seat, so that when the pin shaft is located at the first position, the pin hydraulic cylinder drives the pin shaft to pass through the key hole, the positioning hole and the key hole in sequence.

3. The device for connecting and fixing the drill bit and the power head of a silent rotary drilling machine according to claim 1, characterized in that: A welding hole is penetrated at a position of the rotary drilling bit corresponding to the connecting piece, and the connecting seat passes through the welding hole and is welded to the rotary drilling bit.

4. The device for connecting and fixing the drill bit and the power head of a silent rotary drilling machine as claimed in claim 3, characterized in that: A connecting hole is horizontally penetrated at one end of the connecting seat away from the power head, a connecting rod is welded in the connecting hole, and the connecting rod is welded to the rotary drilling bit.

5. The device for connecting and fixing the drill bit and the power head of a silent rotary drilling machine as claimed in claim 4, characterized in that: The length of the connecting rod is greater than the length of the welding hole.

6. The device for connecting and fixing a drill bit and a power head of a silent rotary drilling machine according to claim 1, characterized in that: The output end of the latch hydraulic cylinder corresponds to the positioning hole.

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