Probe lifting mechanism of dynamic penetrometer

Abstract

The utility model is applicable to the technical field of cone dynamic penetration tests, and provides a dynamic penetration instrument probe lifting mechanism which comprises a penetration instrument, a support frame for guiding and supporting the penetration instrument, and a gravity hammer for hammering the penetration instrument when the penetration instrument is released, a first fixing piece is fixed at the top of the penetration instrument, and a second fixing piece is fixed at the bottom of the penetration instrument. A second fixing piece is fixed to the top of the gravity hammer. In the hammering process, the falling depth of the clamping assembly relative to the gravity hammer is detected through the infrared transmitter and the infrared receiver, so that the falling point of the clamping part at the bottom of the clamping jaw is located between the second conical head and the first conical head all the time, and then the clamping assembly is driven by the air cylinder to move upwards; further, the gravity hammer is synchronously lifted upwards under the clamping of the second conical head by the clamping part, and when the clamping assembly is lifted to the height position of the pressing ring, the gravity hammer is released again for repeated hammering, so that the problem that the hammering potential energy of the gravity hammer to the dynamic penetrometer is influenced by the release mode of the current gravity hammer is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cone penetration test, and particularly relates to a probe lifting mechanism for a dynamic penetration instrument. Background Art

[0002] The cone penetration test is used to estimate the bearing capacity of foundation soil of replacement foundation, cohesive soil, silt, silty sand, fine sand and their treated foundation soils, identify the properties of rock and soil, and evaluate the construction effect of treated foundation soils. The cone penetration test is carried out by using a light dynamic penetration instrument. The light dynamic penetration instrument uses a 10 kg drop hammer, sets the drop distance of the penetration hammer to 50 cm, and penetrates the conical probe connected to the drill rod into the soil by continuous hammering. According to the number of hammer blows N required when the probe penetrates 30 cm into the soil, the mechanical properties of the rock and soil are judged. When carrying out the cone penetration test, the probe of the light dynamic penetration instrument may be difficult to take out after getting stuck in the soil. It is time-consuming and laborious to manually take out the dynamic penetration instrument by using the traditional method.

[0003] After retrieval, the patent with publication number CN212153340U discloses a dynamic penetration instrument with a guiding mechanism, which includes a penetration device and a drop hammer. The penetration device includes a penetration frame device, a drill rod and a penetration head. The penetration frame device is integrally erected on the ground. The drill rod is arranged at the center below the penetration frame device. The penetration head is arranged at the lower end of the drill rod and is fixedly connected to the drill rod. The drop hammer is arranged directly above the drill rod and is located below the penetration frame device. The guiding mechanism is arranged between the penetration frame device and the drill rod. This dynamic penetration instrument ensures the stability of the drill rod during detection. At the same time, the guiding mechanism has a certain protective effect on the drill rod and can guide and support the drill rod.

[0004] However, the above dynamic penetration instrument still has the following problems: the gravity hammer used in the above dynamic penetration instrument is connected with one end of a lifting rope to a winch, and the other end passes through a fixed pulley and is connected to a hook. The hanging ring on the gravity hammer is hung on the hook, and the hammering action of the gravity hammer is completed by the winch repeatedly winding and releasing the lifting rope. Since there is a certain friction between the lifting rope and the winch drum when the lifting rope is released, the kinetic energy of the gravity hammer is weakened, affecting the hammering potential energy of the gravity hammer on the dynamic penetration instrument. Content of the Utility Model

[0005] The utility model provides a probe lifting mechanism for a dynamic penetration instrument, aiming to solve the problem that the current release method of the gravity hammer affects the hammering potential energy of the gravity hammer on the dynamic penetration instrument.

[0006] The utility model is realized as follows. A probe lifting mechanism for a dynamic penetrometer includes a penetrometer, a support frame for guiding and supporting the penetrometer, and a gravity hammer for hammering the penetrometer during release. A first fixing member is fixed to the top of the penetrometer, a second fixing member is fixed to the top of the gravity hammer, a cylinder is fixedly installed on the top surface of the support frame, and a clamping assembly for clamping the first fixing member or the second fixing member is arranged at the output end of the cylinder. A distance measuring device for measuring and controlling the descending depth of the clamping assembly is arranged on the clamping assembly and the gravity hammer, and a pressure ring for unlocking the clamping assembly is fixed to the bottom surface of the top of the support frame.

[0007] Preferably, the first fixing member includes a fixing seat fixed to the top end of the penetrometer. An outer cylinder capable of accommodating the gravity hammer is fixed to the top surface of the fixing seat, and a first conical head is fixed to the top of the outer cylinder.

[0008] Preferably, the diameter of the first conical head gradually increases from top to bottom.

[0009] Preferably, the second fixing member includes an inner cylinder fixed to the top surface of the gravity hammer, and a second conical head is fixed to the top of the inner cylinder.

[0010] Preferably, the diameter of the second conical head gradually increases from top to bottom.

[0011] Preferably, the clamping assembly includes a fixing ring fixed to the output end of the cylinder. A plurality of support rods are radially fixed on the circumferential surface of the fixing ring, and a clamping jaw is hinged to each support rod through a rotating shaft.

[0012] Preferably, an axial spring groove perpendicular to the length direction of the support rod is formed on the support rod. A torsion spring clamped with the rotating shaft is arranged in the spring groove, and a limiting block is arranged at the bottom of the support rod. The clamping jaw abuts against the limiting block under the elastic force of the torsion spring.

[0013] Preferably, a clamping portion bent towards the axis of the fixing ring is arranged at the bottom of the clamping jaw, a pressure-receiving portion bent outwards is arranged at the top of the clamping jaw, and a movable groove for the support rod to pass through is arranged in the middle of the clamping jaw.

[0014] Preferably, the distance measuring device includes an infrared emitter and an infrared receiver. A through hole is formed in the center of the fixing ring, the infrared emitter is fixed in the through hole of the fixing ring, and the infrared receiver is fixed at the center position of the top surface of the gravity hammer.

[0015] Preferably, a pressure groove is arranged on the inner side of the pressure ring, and the pressure groove gradually tapers from bottom to top. <�

[0016] Compared with the related technology, a probe lifting mechanism for a dynamic penetrometer provided by the utility model has the following beneficial effects:

[0017] 1. During the hammering process of the present utility model, the infrared emitter and the infrared receiver are used to detect the descending depth of the clamping assembly relative to the gravity hammer, so that the landing point of the clamping part at the bottom of the clamping jaw is always between the second conical head and the first conical head. Then, the cylinder is used to drive the clamping assembly to move upward. Furthermore, under the clamping of the second conical head by the clamping part, the gravity hammer is synchronously lifted upward. When the clamping assembly rises to the height position where the pressure ring is located, the gravity hammer is released again for repeated hammering, solving the problem that the current release method of the gravity hammer affects the hammering potential energy of the gravity hammer on the dynamic penetrometer.

[0018] 2. After the penetrometer test is completed in the present utility model, the infrared emitter and the infrared receiver are used to detect the descending depth of the clamping assembly relative to the gravity hammer, so that the landing point of the clamping part at the bottom of the clamping jaw is below the first conical head. Then, the cylinder is used to drive the clamping assembly to move upward. Furthermore, under the clamping of the first conical head by the clamping part, the penetrometer and the gravity hammer can be synchronously lifted upward, and then the penetrometer can be pulled out of the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic structural diagram of a probe lifting mechanism of a dynamic penetrometer proposed by the present utility model;

[0020] Figure 2 FIG. is a schematic structural diagram of a probe lifting mechanism of a dynamic penetrometer proposed by the present utility model from another perspective;

[0021] Figure 3 FIG. is a schematic structural diagram of the clamping assembly proposed by the present utility model;

[0022] Figure 4 FIG. is a schematic structural diagram of the support rod and the clamping jaw proposed by the present utility model;

[0023] Figure 5 FIG. is a schematic cross-sectional structural diagram of the first fixing member and the second fixing member proposed by the present utility model;

[0024] Figure 6 FIG. is a schematic cross-sectional structural diagram of the pressure ring proposed by the present utility model.

[0025] In the figure: 1, support frame; 2, penetrometer; 3, cylinder; 4, first fixing member; 41, fixing seat; 42, outer cylinder; 43, first conical head; 5, second fixing member; 51, inner cylinder; 52, second conical head; 53, infrared receiver; 6, clamping assembly; 61, fixing ring; 62, support rod; 621, spring groove; 622, torsion spring; 623, limit block; 63, clamping jaw; 631, pressure-receiving part; 632, clamping part; 633, movable groove; 64, rotating shaft; 65, infrared emitter; 7, pressure ring; 71, pressure groove; 8, gravity hammer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the description of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0027] Reference herein to "embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] Embodiment

[0029] Please refer to Figure 1 And Figure 2 , a dynamic sounding probe lifting mechanism, including a sounding instrument 2, a support frame 1 for guiding and supporting the sounding instrument 2, a gravity hammer 8 for hammering the sounding instrument 2 when released. A first fixing member 4 is fixed to the top of the sounding instrument 2, a second fixing member 5 is fixed to the top of the gravity hammer 8, a cylinder 3 is fixedly installed on the top surface of the support frame 1, a clamping assembly 6 for clamping the first fixing member 4 or the second fixing member 5 is arranged at the output end of the cylinder 3, a ranging device for measuring and controlling the descending depth of the clamping assembly 6 is arranged on the clamping assembly 6 and the gravity hammer 8, and a pressure ring 7 for unlocking the clamping assembly 6 is fixed to the bottom surface of the top of the support frame 1.

[0030] Please refer to Figure 4 , the first fixing member 4 includes a fixing seat 41, the fixing seat 41 is fixed to the top end of the sounding instrument 2, an outer cylinder 42 capable of accommodating the gravity hammer 8 is fixed to the top surface of the fixing seat 41, a first cone head 43 is fixed to the top of the outer cylinder 42, the diameter of the first cone head 43 gradually increases from top to bottom, the second fixing member 5 includes an inner cylinder 51, the inner cylinder 51 is fixed to the top surface of the gravity hammer 8, a second cone head 52 is fixed to the top of the inner cylinder 51, the diameter of the second cone head 52 gradually increases from top to bottom, and when the gravity hammer 8 is released from a high place, it can fall into the outer cylinder 42 and then hammer the sounding instrument 2 to make the sounding instrument 2 sink into the ground.

[0031] Please refer to Figure 3 And Figure 4, the clamping assembly 6 includes a fixed ring 61, the fixed ring 61 is fixed to the output end of the cylinder 3, several support rods 62 are radially fixed on the circumferential surface of the fixed ring 61, and a jaw 63 is hinged to each support rod 62 through a rotating shaft 64. An axial spring groove 621 perpendicular to the length direction of the support rod 62 is opened on the support rod 62. A torsion spring 622 that is snap-fitted with the rotating shaft 64 is arranged in the spring groove 621. A limiting block 623 is provided at the bottom of the support rod 62. The jaw 63 abuts against the limiting block 623 under the elastic force of the torsion spring 622. A clamping portion 632 that bends towards the axis of the fixed ring 61 is provided at the bottom of the jaw 63. A pressure-receiving portion 631 that bends outwards is provided at the top of the jaw 63. An activity groove 633 for the support rod 62 to pass through is provided in the middle of the jaw 63. The distance measuring device includes an infrared emitter 65 and an infrared receiver 53. A through hole is opened at the center of the fixed ring 61. The infrared emitter 65 is fixed in the through hole of the fixed ring 61. The infrared receiver 53 is fixed at the center position of the top surface of the gravity hammer 8. During the hammering process, the infrared emitter 65 and the infrared receiver 53 are used to detect the descending depth of the clamping assembly 6 relative to the gravity hammer 8, so that the landing point of the clamping portion 632 at the bottom of the jaw 63 is always between the second conical head 52 and the first conical head 43. Then, the cylinder 3 is used to drive the clamping assembly 6 to move upwards, and then the gravity hammer 8 is synchronously lifted upwards by clamping the second conical head 52 through the clamping portion 632. When the clamping assembly 6 rises to the height position where the pressure ring 7 is located, the gravity hammer 8 is released again for repeated hammering.

[0032] Please refer to Figure 6 , a pressure groove 71 is provided on the inner side of the pressure ring 7, and the pressure groove 71 gradually tapers from bottom to top. The cylinder 3 is used to drive the clamping assembly 6 to lift the gravity hammer 8 upwards. When the clamping assembly 6 rises to the height position where the pressure ring 7 is located, the pressure-receiving portion 631 at the top of the jaw 63 is squeezed by the pressure groove 71 on the inner side of the pressure ring 7, so that the jaw 63 rotates with the rotating shaft 64 as the fulcrum against the elastic force of the torsion spring 622, and then the gravity hammer 8 is released.

[0033] The working principle of the present utility model is as follows: When in use, the penetrometer 2 and the support frame 1 are as Figure 1It is placed at the position to be measured. The clamping component 6 is driven by the cylinder 3 to lift the gravity hammer 8 upward. When the clamping component 6 rises to the height position of the pressure ring 7, the top pressure part 631 of the jaw 63 is extruded by the inner pressure groove 71 of the pressure ring 7, causing the jaw 63 to rotate with the rotating shaft 64 as the fulcrum against the elastic force of the torsion spring 622, thereby releasing the gravity hammer 8. The gravity hammer 8 quickly hammers downward under the action of gravity. During the hammering process, the infrared emitter 65 and the infrared receiver 53 are used to detect the descending depth of the clamping component 6 relative to the gravity hammer 8, so that the landing point of the bottom clamping part 632 of the jaw 63 is always between the second cone head 52 and the first cone head 43. Then, the cylinder 3 is used to drive the clamping component 6 to move upward, and then the gravity hammer 8 is synchronously lifted upward by clamping the second cone head 52 through the clamping part 632. When the clamping component 6 rises to the height position of the pressure ring 7, the gravity hammer 8 is released again for repeated hammering;

[0034] After the penetrometer 2 finishes the test, the infrared emitter 65 and the infrared receiver 53 are used to detect the descending depth of the clamping component 6 relative to the gravity hammer 8, so that the landing point of the bottom clamping part 632 of the jaw 63 is below the first cone head 43. Then, the cylinder 3 is used to drive the clamping component 6 to move upward, and then the penetrometer 2 and the gravity hammer 8 can be synchronously lifted upward by clamping the first cone head 43 through the clamping part 632, thereby pulling the penetrometer 2 out of the ground.

[0035] It should be noted that the circuits, electronic components, and modules involved in the present utility model are all prior arts, which can be fully realized by those skilled in the art without further elaboration. The content protected by the present utility model does not involve improvements to software and methods.

[0036] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division of the lifting mechanism of the dynamic penetrometer probe. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0037] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without making creative efforts, combine, add, delete or make other adjustments to the features in the various embodiments of the present utility model according to the circumstances, so as to obtain different technical solutions that essentially do not depart from the concept of the present utility model, and these technical solutions also fall within the scope of protection of the present utility model.

Claims

1. A dynamic sounding instrument probe lifting mechanism, comprising a sounding instrument (2), a support frame (1) for guiding and supporting the sounding instrument (2), and a gravity hammer (8) for hammering the sounding instrument (2) during release, characterized in that, A first fixing member (4) is fixed to the top of the sounding instrument (2), a second fixing member (5) is fixed to the top of the gravity hammer (8), a cylinder (3) is fixedly installed on the top surface of the support frame (1), a clamping assembly (6) for clamping the first fixing member (4) or the second fixing member (5) is arranged at the output end of the cylinder (3), a ranging device for measuring and controlling the descending depth of the clamping assembly (6) is arranged on the clamping assembly (6) and the gravity hammer (8), and a pressing ring (7) for unlocking the clamping assembly (6) is fixed to the bottom surface of the top of the support frame (1).

2. The probe lifting mechanism of a dynamic sounding instrument according to claim 1, wherein, The first fixing member (4) includes a fixing base (41), the fixing base (41) is fixed to the top end of the sounding instrument (2), an outer cylinder (42) capable of accommodating the gravity hammer (8) is fixed to the top surface of the fixing base (41), and a first conical head (43) is fixed to the top of the outer cylinder (42).

3. The probe lifting mechanism of a dynamic penetration tester according to claim 2, characterized in that, The diameter of the first conical head (43) gradually increases from top to bottom.

4. The lifting mechanism of the dynamic penetration tester probe according to claim 2, wherein The second fixing member (5) includes an inner cylinder (51), the inner cylinder (51) is fixed to the top surface of the gravity hammer (8), and a second conical head (52) is fixed to the top of the inner cylinder (51).

5. The lifting mechanism of the dynamic sounding instrument probe according to claim 4, characterized in that, The diameter of the second conical head (52) gradually increases from top to bottom.

6. The probe lifting mechanism of a dynamic sounding instrument according to claim 1, characterized in that, The clamping assembly (6) includes a fixing ring (61), the fixing ring (61) is fixed to the output end of the cylinder (3), a plurality of support rods (62) are radially fixed on the circumferential surface of the fixing ring (61), and a clamping jaw (63) is hinged to each support rod (62) through a rotating shaft (64).

7. The lifting mechanism of the dynamic penetration tester probe according to claim 6, wherein An axial spring groove (621) perpendicular to the length direction of the support rod (62) is formed in the support rod (62), a torsion spring (622) clamped with the rotating shaft (64) is arranged in the spring groove (621), a limiting block (623) is arranged at the bottom of the support rod (62), and the clamping jaw (63) abuts against the limiting block (623) under the elastic force of the torsion spring (622).

8. The lifting mechanism of the dynamic sounding instrument probe according to claim 7, characterized in that A clamping portion (632) bent towards the axis direction of the fixing ring (61) is arranged at the bottom of the clamping jaw (63), a pressure receiving portion (631) bent outwards is arranged at the top of the clamping jaw (63), and a moving groove (633) for the support rod (62) to movably pass through is arranged in the middle of the clamping jaw (63).

9. The lifting mechanism for the dynamic sounding instrument probe according to claim 6, characterized in that, The ranging device includes an infrared emitter (65) and an infrared receiver (53), a through hole is formed in the center of the fixing ring (61), the infrared emitter (65) is fixed in the through hole of the fixing ring (61), and the infrared receiver (53) is fixed at the center position of the top surface of the gravity hammer (8).

10. The lifting mechanism of the dynamic sounding instrument probe according to claim 1, characterized in that, A pressing groove (71) is arranged on the inner side of the pressing ring (7), and the pressing groove (71) gradually tapers from bottom to top.

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