Buffer device and rotary drilling rig

Abstract

The present application relates to the technical field of engineering machinery and equipment, and specifically to a buffer device and a rotary drilling rig. The buffer device includes a buffer pressure plate, a key sleeve body, a guide rod, an elastic member and a guide flange; the buffer pressure plate is sleeved on the key sleeve body; the first end of the guide rod is movably connected to the buffer pressure plate, and the second end is detachably connected to the key sleeve body; the buffer pressure plate can move toward the key sleeve body along the length direction of the guide rod; the elastic member is arranged between the buffer pressure plate and the key sleeve body, and the expansion and contraction direction of the elastic member is consistent with the length direction of the guide rod. When the buffer pressure plate moves close to the key sleeve body, the elastic member is compressed; the guide flange is connected to a predetermined position of the key sleeve body so that the buffer pressure plate can contact the guide flange under the action of the restoring force of the elastic member. The guide rod of the buffer device provided by the present application is easy to install and disassemble, and when the buffer pressure plate is limited by the guide flange, the contact area between the two is large, and stress concentration problems are not easily generated, thereby improving the reliability of the limit.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery and equipment, and in particular to a buffer device and a rotary drilling rig. Background Art

[0002] A rotary drilling rig is a construction machine suitable for drilling holes in building foundations. It is widely used in various foundation construction applications, such as cast-in-place piles and foundation reinforcement. The power head, as the working device of the rotary drilling rig, provides the power for drilling. Therefore, the reliability of the power head is crucial for the rotary drilling rig, and the buffer key sleeve is a key component of the power head.

[0003] The existing buffer key sleeve uses a guide rod nut to limit the buffer pressure plate, but it is easy to cause the guide rod to break and fail. The structure using a wedge block for limiting is complicated to install and is prone to stress concentration problems, resulting in limit failure. Summary of the Invention

[0004] The object of the present invention is to provide a buffer device and a rotary drilling rig, so as to solve the technical problem that the limiting components of the existing buffer device for the rotary drilling rig are easily broken and lose effectiveness to a certain extent.

[0005] The present application provides a buffer device, comprising a buffer pressure plate, a key sleeve body, a guide rod, an elastic member and a guide flange;

[0006] The first end of the guide rod is movably connected to the buffer pressure plate, and the second end of the guide rod is movably connected to the key sleeve.

[0007] The buffer pressure plate can move toward the key sleeve body along the length direction of the guide rod;

[0008] The elastic member is arranged between the buffer pressure plate and the key sleeve body, and the guide flange is connected to a predetermined position of the key sleeve body, so that the buffer pressure plate can contact the guide flange under the action of the restoring force of the elastic member.

[0009] In the above technical solution, preferably, the buffer pressure plate is sleeved outside the key sleeve body; a guide hole is opened on the lower flange of the buffer pressure plate, and the first end of the guide rod passes through the guide hole and forms a gap between the first end and the guide hole.

[0010] In any of the above technical solutions, preferably, a threaded connection portion is formed on the second end of the guide rod;

[0011] The threaded connection portion is threadedly connected to the positioning flange of the key sleeve body, or

[0012] The threaded connection portion passes through the positioning flange of the key sleeve body and is threadedly connected to the nut.

[0013] In any of the above technical solutions, preferably, the guide flange is located between the upper flange and the lower flange of the buffer pressure plate, and the guide flange is detachably connected to the top of the key sleeve body.

[0014] In any of the above technical solutions, preferably, the guide flange includes one or more arc-shaped guide segments;

[0015] When the guide flange includes a plurality of arc-shaped guide segments, the plurality of arc-shaped guide segments are arranged in sequence to form an annular flange structure.

[0016] In any of the above technical solutions, preferably, the maximum opening diameter of the arc-shaped guide section is smaller than the inner diameter of the upper flange of the buffer pressure plate.

[0017] In any of the above technical solutions, preferably, the outer diameter of the annular flange structure is larger than the inner diameter of the lower flange of the buffer pressure plate, and smaller than the inner diameter of the cylinder of the buffer pressure plate.

[0018] In any of the above technical solutions, preferably, a guide groove is formed on the side of the inner wall of the arc-shaped guide section facing the buffer pressure plate, and a guide key is formed on the inner wall of the buffer pressure plate. The guide key and the guide groove are arranged in a one-to-one correspondence, and the guiding direction of the guide key and the guide groove is consistent with the movement direction of the buffer pressure plate.

[0019] In any of the above technical solutions, preferably, a plurality of mounting holes are provided on the arc-shaped guide segment for connecting the arc-shaped guide segment and the key sleeve body.

[0020] The present application also provides a rotary drilling rig, comprising any of the buffer devices described above.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The buffer device provided by this application optimizes the structure of the guide rod, making it easy to install and disassemble. It also eliminates the connecting nut between the upper end of the guide rod and the buffer pressure plate in the prior art, eliminating the problem of guide rod failure caused by nut positioning. In addition, when the buffer device of this application uses the guide flange to limit the buffer pressure plate, the contact area between the two is large, which is less likely to cause stress concentration problems and improves the reliability of the limit.

[0023] The rotary drilling rig provided in the present application includes the buffer device, and thus also has the beneficial effect of improving the reliability of the limit of the buffer device and facilitating disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of the buffer device provided in an embodiment of the present application at a first viewing angle;

[0026] Figure 2 A schematic structural diagram of the buffer device provided in an embodiment of the present application at a second viewing angle;

[0027] Figure 3 A schematic cross-sectional view of a partial structure of a buffer device provided in an embodiment of the present application;

[0028] Figure 4 A schematic structural diagram of a guide flange of a buffer device provided in an embodiment of the present application from one perspective;

[0029] Figure 5 A schematic structural diagram of the guide flange of the buffer device provided in an embodiment of the present application from another perspective;

[0030] Figure 6 A schematic structural diagram of the arc-shaped guide section of the guide flange provided in an embodiment of the present application;

[0031] Figure 7 A schematic structural diagram of the guide rod provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1-buffer pressure plate, 11-upper flange, 12-lower flange, 13-cylinder, 131-guide key, 2-key sleeve, 21-positioning flange, 3-guide rod, 31-threaded connection part, 32-stepped limiting structure, 4-nut, 5-spring, 6-guide flange, 61-arc-shaped guide section, 611-guide groove, 612-mounting hole, 7-buffer. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0036] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, 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 fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0040] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0041] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0042] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0043] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0044] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0045] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0046] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0047] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0048] Refer to the following Figures 1 to 7 A buffer device and a rotary drilling rig according to some embodiments of the present invention are described.

[0049] Example 1

[0050] This embodiment provides a buffer device, including a buffer pressure plate 1, a key sleeve body 2, a guide rod 3, an elastic member and a guide flange 6.

[0051] like Figure 1 and Figure 2 As shown, the buffer pressure plate 1 includes an upper flange 11, a cylinder 13 and a lower flange 12. The cylinder 13 and the lower flange 12 of the buffer pressure plate 1 are mounted on the outside of the key sleeve body 2 and can move relative to the key sleeve body 2 along the axial direction of the buffer pressure plate 1 (i.e., the first direction) to approach the key sleeve body 2 or move away from the key sleeve body 2.

[0052] like Figure 1 and Figure 2 As shown, the guide rod 3 is located outside the key sleeve body 2 and is arranged along the axial direction of the buffer pressure plate 1, that is, the length direction of the guide rod 3 is the first direction. A guide hole is formed on the lower flange 12 and passes through the guide hole in the first direction. The first end of the guide rod 3 passes through the guide hole and a gap is formed between the guide hole and the guide hole so that the first end of the guide rod 3 can move in the guide hole in the first direction. Figure 7 As shown, the second end of the guide rod 3 is formed with a threaded connection portion 31, and the threaded connection portion 31 is threadedly connected to the positioning flange 21 of the key sleeve body 2 (not shown in the figure) or the threaded connection portion 31 passes through the positioning flange 21 of the key sleeve body 2 and is connected to the nut 4 (as shown in the figure). Figure 1As shown), the guide rod 3 is detachably connected to the key sleeve body 2. When the guide rod 3 needs to be disassembled, it is only necessary to disassemble the threaded connection portion 31 of the guide rod 3 from the key sleeve body 2 or the nut 4 to achieve the disassembly of the guide rod 3.

[0053] In addition, it should be noted that, in order to improve the connection stability between the threaded connection portion 31 of the guide rod 3 and the key sleeve body 2, preferably, as shown in FIG. Figure 7 As shown, a stepped limiting structure 32 or an expanded diameter structure (not shown in the figure) is formed on the guide rod 3 at one end close to the first end of the corresponding threaded connection part 31, that is, the diameter of the threaded connection part 31 of the guide rod 3 is smaller than the diameter of the main body of the guide rod 3, so that when the threaded connection part 31 is connected to the positioning flange 21 or the nut 4 of the key sleeve body 2, the stepped limiting structure 32 or the expanded diameter structure can limit the guide rod 3, thereby improving the stability of the installation of the guide rod 3.

[0054] like Figure 1 and Figure 2 As shown, the elastic member can be a spring 5, which is preferably sleeved on the guide rod 3 and located between the lower flange 12 of the buffer pressure plate 1 and the positioning flange 21 of the key sleeve body 2. When the buffer pressure plate 1 is driven by the driving force and moves toward the key sleeve body 2 along the first direction, the spring 5 is continuously compressed and applies a force to the buffer pressure plate 1 to move away from the key sleeve body 2. Therefore, when the driving force on the buffer pressure plate 1 is removed, the buffer pressure plate 1 can move away from the key sleeve body 2 along the first direction under the action of the restoring force of the spring 5.

[0055] Preferably, if Figure 1 and Figure 2 As shown, in order to ensure the balanced force and stable movement of the buffer pressure plate 1, there are multiple guide rods 3 and springs 5, and they are arranged at intervals between the lower flange 12 of the buffer pressure plate 1 and the positioning flange 21 of the key sleeve body 2. Multiple guide rods 3 and multiple springs 5 ​​are arranged in a one-to-one correspondence.

[0056] like Figure 2 and Figure 3 As shown, the guide flange 6 is connected to a predetermined position of the key sleeve body 2, specifically, the top of the key sleeve body 2. When the buffer platen 1 moves away from the key sleeve body 2 under the action of the restoring force of the spring 5, the lower flange 12 of the buffer platen 1 can contact the guide flange 6, thereby limiting the movement of the buffer platen 1.

[0057] Since the guide flange 6 needs to be installed in the buffer pressure plate 1 and connected to the top of the key sleeve body 2, in order to facilitate the installation of the guide flange 6, the guide flange 6 is designed to be a segmented structure. Figure 2 and Figures 4 to 6As shown, the guide flange 6 includes one or more arc-shaped guide segments 61; a plurality of mounting holes 612 are provided on the arc-shaped guide segment 61, and the arc-shaped guide segment 61 can be fixedly mounted on the top of the key sleeve body 2 through the mounting holes 612 and connectors (such as screws). When the guide flange 6 includes a plurality of arc-shaped guide segments 61, the arc-shaped guide segments 61 are arranged in sequence to form an annular flange structure. Compared with a structure in which there is only one arc-shaped guide segment 61, the arrangement of a plurality of arc-shaped guide segments 61 in sequence to form an annular flange structure has a better limiting effect on the buffer pressure plate 1. The plurality of arc-shaped guide segments 61 jointly share the impact force received by the buffer pressure plate 1 when limiting the position, thereby avoiding force concentration and preventing the position from failing.

[0058] The number of the plurality of arc-shaped guide segments 61 included in the guide flange 6 can be two, three, four, etc., wherein Figure 4 and Figure 5 The figure shows a structure in which there are three arc-shaped guide segments 61. The three arc-shaped guide segments 61 are arranged in sequence to form an annular flange structure, and gaps are formed between adjacent arc-shaped guide segments 61 so that there is a certain buffer space when the arc-shaped guide segment 61 is subjected to the impact force of the buffer pressure plate 1 when it is reset.

[0059] In order to facilitate the installation of the arc-shaped guide section 61 from the mouth of the upper flange 11 of the buffer pressure plate 1 to the top of the key sleeve body 2 in the buffer pressure plate 1, the maximum opening diameter of the arc-shaped guide section 61 is set (corresponding to Figure 6 F) is smaller than the inner diameter of the upper flange 11 of the buffer plate 1 (corresponding to Figure 3 In the embodiment of the present invention, E), and preferably, E≥F+5 (unit: mm), the installation of the guide flange 6 can be achieved.

[0060] In order to make the guide flange 6 limit the buffer pressure plate 1, the outer diameter of the guide flange 6 is set (corresponding to Figure 3 B) is larger than the inner diameter of the lower flange 12 of the buffer plate 1 (corresponding to Figure 3 A), and preferably, B≥A+20 (unit: mm), so that when the buffer pressure plate 1 moves away from the key sleeve body 2, the lower flange 12 of the buffer pressure plate 1 can abut against the guide flange 6, thereby limiting the buffer pressure plate 1.

[0061] In addition, if Figure 2 、 Figure 5 and Figure 6As shown, in order to further increase the guiding and limiting effect of the arc-shaped guide segment 61 on the buffer pressure plate 1 during the movement of the buffer pressure plate 1, a guide groove 611 extending along the first direction is formed on the side of the inner wall of the arc-shaped guide segment 61 facing the buffer pressure plate 1, and a guide key 131 extending along the first direction is formed on the inner wall of the buffer pressure plate 1. The guide key 131 is arranged in a one-to-one correspondence with the guide groove 611, so that the buffer pressure plate 1 can be further guided and limited during the movement of the buffer pressure plate 1. Specifically, the number of guide grooves 611 on the arc-shaped guide segment 61 is determined according to the arc length of the arc-shaped guide segment 61. The longer the arc length of the arc-shaped guide segment 61, the more guide grooves 611 can be arranged thereon. Preferably, as Figure 5 As shown, when the guide flange 6 includes three arcuate guide segments 61, two guide grooves 611 are formed on each arcuate guide segment 61. In addition, a guide key extending along the first direction may be formed on one side of the inner wall of the arcuate guide segment 61, and a guide groove extending along the first direction may be formed on the inner wall of the buffer pressure plate 1 to form a guide matching structure.

[0062] In addition, a buffer 7 is provided between the lower flange 12 of the buffer pressure plate 1 and the positioning flange 21 of the key sleeve body 2 .

[0063] The following combination Figure 1 and Figure 2 The structure of the buffer device of this embodiment is described in detail, and the assembly and disassembly process and the working process of the buffer device of this embodiment are described in detail.

[0064] The assembly process of the buffer device is as follows: first, install the guide rod 3 on the key sleeve body 2, and put the spring 5 on the guide rod 3; then, assemble the buffer pressure plate 1 to the key sleeve body 2 through the guide rod 3; finally, place the guide flange 6 through the mouth of the upper flange 11 of the buffer pressure plate 1 into the appropriate position in the buffer pressure plate 1, and fix it to the key sleeve body 2.

[0065] During the disassembly process of the buffer device, the guide rod 3 can be disassembled by simply removing the nut 4 at the lower part of the guide rod 3, and then the disassembly between the buffer pressure plate 1 and the key sleeve body 2 can be carried out.

[0066] During the assembly and disassembly process of the above-mentioned buffer device, the structure of the guide rod 3 is optimized to make it easy to install and disassemble, and the guide flange 6 is designed to be segmented to facilitate the installation of the guide flange 6, and the connecting nut between the upper end of the guide rod and the buffer pressure plate in the prior art is eliminated, eliminating the problem of guide rod failure caused by nut positioning.

[0067] The working process of the buffer device is as follows: after the buffer pressure plate 1 is subjected to force, the buffer pressure plate 1 moves downward under the guidance of the guide key 131, the guide groove 611 of the guide flange 6 and the guide rod 3, and the spring 5 is compressed; when the buffer pressure plate 1 moves to the limit position, when the driving force acting on the buffer pressure plate 1 is withdrawn, the spring 5 moves upward, and the buffer pressure plate 1 moves upward under the guidance of the guide key 131, the guide groove 611 of the guide flange 6 and the guide rod 3. When it reaches the starting position, the lower flange 12 of the buffer pressure plate 1 contacts the guide flange 6, which serves to limit the buffer pressure plate 1.

[0068] During the above-mentioned movement process, the movement process of the buffer pressure plate 1 is stable and not easy to deviate, and the limiting effect of the buffer pressure plate 1 is good. When the guide flange 6 limits the buffer pressure plate 1, the contact area between the two is large, and it is not easy to cause stress concentration problems, thereby improving the reliability of the limitation.

[0069] Example 2

[0070] This embodiment provides a rotary drilling rig, including the buffer device of the above embodiment, and thus also has the beneficial effects of improving the reliability of the limit of the buffer device and facilitating disassembly and maintenance.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A buffer device, characterized in that: It includes a buffer pressure plate, a key sleeve body, a guide rod, an elastic member and a guide flange; The first end of the guide rod is movably connected to the buffer pressure plate, and the second end of the guide rod is detachably connected to the key sleeve body; the buffer pressure plate can move toward the key sleeve body along the length direction of the guide rod; The elastic member is provided between the buffer pressure plate and the key sleeve body, and the guide flange is connected to a predetermined position of the key sleeve body, so that the buffer pressure plate can contact the guide flange under the action of the restoring force of the elastic member; The guide flange is located between the upper flange and the lower flange of the buffer pressure plate, and the guide flange is detachably connected to the top of the key sleeve body; the guide flange includes one or more arc-shaped guide sections; When the guide flange includes a plurality of arc-shaped guide segments, the plurality of arc-shaped guide segments are sequentially arranged to form an annular flange structure, with gaps formed between adjacent arc-shaped guide segments; the outer diameter of the annular flange structure is larger than the inner diameter of the lower flange of the buffer pressure plate and smaller than the inner diameter of the cylinder of the buffer pressure plate; The buffer pressure plate is sleeved outside the key sleeve; A guide hole is formed on the lower flange of the buffer pressure plate, and the first end of the guide rod passes through the guide hole and forms a gap with the guide hole; A guide groove is formed on one side of the inner wall of the arc-shaped guide section facing the buffer pressure plate, and a guide key is formed on the inner wall of the buffer pressure plate. The guide keys are arranged in a one-to-one correspondence with the guide grooves, and the guiding directions of the guide keys and the guide grooves are consistent with the movement direction of the buffer pressure plate.

2. The buffer device according to claim 1, characterized in that A threaded connection portion is formed on the second end of the guide rod; The threaded connection portion is threadedly connected to the positioning flange of the key sleeve body, or The threaded connection portion passes through the positioning flange of the key sleeve body and is threadedly connected to the nut.

3. The buffer device according to claim 1, characterized in that The maximum opening diameter of the arc-shaped guide section is smaller than the inner diameter of the upper flange of the buffer pressure plate.

4. The buffer device according to claim 1, characterized in that The arc-shaped guide section is provided with a plurality of mounting holes for connecting the arc-shaped guide section and the key sleeve body.

5. A rotary drilling rig, characterized in that: The invention comprises the buffer device according to any one of claims 1 to 4.

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