Automatic probe rod clamping assembly for static sounding

Abstract

The utility model discloses an automatic feeler lever clamping assembly for static sounding, which comprises a moving beam for driving a feeler lever to move up and down, two conical feeler lever placing holes which are in radial symmetry are formed in the center of the moving beam, and feeler lever clamping sleeves matched with the feeler lever placing holes are placed in the feeler lever placing holes. Counter bores are vertically formed in the two sides of the probe rod containing hole, elastic reset assemblies are installed in the counter bores, and when the movable beam ascends or descends, the elastic reset assemblies enable the clamping sleeve to clamp the probe rod. According to the utility model, the middle joint of the probe rod can be matched with the clamping sleeve, so that the problem of slipping caused by insufficient clamping force can be avoided; and meanwhile, the reset assembly is additionally arranged, so that the automatic clamping of the clamping sleeve on the probe rod during the penetrating or pulling-out operation can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of geological exploration, and particularly relates to an automatic clamping assembly for a sounding rod used in static cone penetration test. Background Technique

[0002] In the technical field of geotechnical engineering investigation, static cone penetration test, as an important in-situ test method, is widely used in the evaluation of the comprehensive mechanical properties of foundation soil. The static cone penetration test presses a sounding rod with a cone penetrometer head into the test soil layer through a pressure device, and determines key physical and mechanical indexes such as the deformation modulus and bearing capacity of the soil by measuring the penetration resistance of the soil. This technology is widely trusted in the field of geotechnical engineering exploration due to its characteristics of detailed layering and accurate results.

[0003] However, in the prior art, the realization of static cone penetration test mainly relies on the traditional double hydraulic cylinder drive mode. During the working process, the telescopic movement of the piston rod of the hydraulic cylinder directly determines the penetration or extraction of the sounding rod. This mode has an obvious limitation, that is, only when the piston rod of the hydraulic cylinder fully extends and retracts, can it drive the sounding rod to perform corresponding actions, thus unable to ensure the continuous penetration or extraction of the sounding rod. The main reason is that the traditional methods of using the card plate type or the ferrule type to drive the sounding rod to penetrate or extract have cumbersome operations, poor safety, or insufficient clamping force, resulting in slipping phenomena and low operation efficiency.

[0004] To solve this problem, some improvement schemes have been proposed in the industry. For example, the automatic rod clamping device with the patent number CN201520792064.X, although it solves the problem that the rod clamping device needs to rely on external force to clamp the sounding rod, its structure is complex, the operation is cumbersome, and there is a problem of insufficient clamping.

[0005] Therefore, aiming at the problems existing in the prior art, the utility model proposes a new type of static cone penetration test device. By adding the design of a middle joint of the sounding rod and a clamping sleeve, and introducing an elastic reset component, it aims to solve the problems of insufficient clamping force and slipping of the sounding rod during the penetration or extraction operation, and improve the operation efficiency. Summary of the Utility Model

[0006] Aiming at the problems existing in the prior art, the utility model provides an automatic clamping assembly for a sounding rod used in static cone penetration test.

[0007] The utility model is realized as follows: an automatic clamping assembly for a sounding rod used in static cone penetration test, including a moving beam that drives the sounding rod to move up and down. Two conical sounding rod placement holes that are radially symmetric are arranged at the center of the moving beam. A clamping sleeve that matches the sounding rod placement hole is placed in the sounding rod placement hole. Counterbores are vertically arranged on both sides of the sounding rod placement hole. An elastic reset component is installed in the counterbores. When the moving beam moves up or down, the reset component makes the clamping sleeve closely adhere to the sounding rod.

[0008] Preferably, the elastic reset assembly includes a movable sleeve and a guide rod installed inside the movable sleeve. A reset spring is provided between the guide rod and the bottom of the movable sleeve. The lower end of the guide rod extends out of the moving beam, and a lower locking nut is fitted on the guide rod below the moving beam; the upper part of the guide rod of the movable sleeve extends out of the moving beam, and an upper locking nut is screwed on the movable sleeve above the moving beam; a lower limit card is provided between the lower locking nut and the moving beam; an upper limit card is provided between the upper locking nut and the moving beam.

[0009] Preferably, the upper locking nut is a rainproof nut.

[0010] Preferably, the lower limit card and the upper limit card are oblong, and one end thereof is provided with a mounting hole.

[0011] Preferably, the lower limit card and the upper limit card are semi-circular, one end thereof is provided with a mounting hole, and the other end is provided with a U-shaped bayonet.

[0012] Preferably, the inner hole of the large-diameter end of the clamping sleeve is provided with a conical clamping surface.

[0013] Preferably, the clamping sleeve is of a split structure and includes two semi-conical clamping sleeve monomers with the same structure.

[0014] Preferably, the clamping sleeve is of a split structure and includes two square-conical clamping sleeve monomers with the same structure.

[0015] Preferably, a roller shaft is provided on the inner wall of the probe rod placement hole, and the roller shaft abuts against the square-conical clamping sleeve monomer.

[0016] Preferably, the inner surface of the clamping sleeve is provided with anti-slip grooves.

[0017] The advantages and technical effects of the present utility model: The probe rod automatic clamping assembly of the present utility model has the following remarkable advantages:

[0018] Tightly and stably connected: Through the tight fit between the threaded connection section and the internal thread of the probe rod, the stable connection between the probe rod intermediate joint and the probe rod is ensured, effectively preventing loosening and slipping.

[0019] Efficient clamping design: The design of the transition section and the conical clamping surface enables the probe rod to be more tightly clamped by the clamping sleeve during subsequent operations, greatly improving the clamping efficiency and stability.

[0020] Precise reset control: The elastic reset assembly ensures that the clamping sleeve can maintain a stable clamping state with the probe rod during the movement of the moving beam through the precise control of the reset spring and the movable sleeve, avoiding clamping failure caused by external forces.

[0021] Flexible adaptability: The split structure of the clamping sleeve includes two semi-circular clamping sleeve monomers, enabling the clamping sleeve to adapt to probe rods of different diameters, thus improving its versatility and adaptability.

[0022] Anti-slip and stable clamping: The anti-slip groove design on the inner surface of the clamping sleeve increases the friction with the probe rod, effectively preventing the probe rod from sliding and clamping failure during penetration or extraction.

[0023] Easy to operate: The split-structured clamping sleeve is more convenient during installation and disassembly, improving work efficiency.

[0024] Perfect protection mechanism: Through the settings of the locking nut, rain-proof nut, lower limit clamping plate and upper limit clamping plate, the stability and reliability of the reset assembly are further ensured, and the service life of the entire clamping assembly is improved.

[0025] In summary, the automatic clamping assembly for the probe rod of the present utility model has the advantages of reasonable structure, stable clamping, strong adaptability, easy operation, safety and reliability, etc., and can meet the high-efficiency clamping requirements of the probe rod during penetration or extraction. Brief Description of the Drawings

[0026] Figure 1 is the structural schematic diagram of the present utility model;

[0027] Figure 2 is the partial structural schematic diagram of the cooperation between the probe rod and the moving beam;

[0028] Figure 3 is Figure 2 the top view of;

[0029] Figure 4 is Figure 3 the A-A cross-sectional view in;

[0030] Figure 5 and Figure 6 is the three-dimensional structural schematic diagram of the present utility model (removing the probe head);

[0031] Figure 7 is the structural schematic diagram of the intermediate joint of the probe rod;

[0032] Figure 8 is the structural schematic diagram of the semi-conical clamping sleeve monomer;

[0033] Figure 9 is the structural schematic diagram of the semi-square conical clamping sleeve;

[0034] Figure 10 is the installation schematic diagram of the semi-square conical clamping sleeve;

[0035] Figure 11 is Figure 10 the top view of;

[0036] Figure 12 It is a schematic structural diagram of a semi-circular limit clamping plate.

[0037] 100, sounding rod; 101, the first section of the sounding rod body; 102, the second section of the sounding rod body; 103, male coupling joint; 104, female coupling joint; 1, middle joint of the sounding rod; 11, threaded connection section; 12, transition section; 13, conical clamping surface; 2, moving beam; 21, sounding rod placement hole; 3, clamping sleeve; 31, roller; 32, single unit of the clamping sleeve kit; 33, anti-slip groove; 34, conical clamping surface; 4, reset assembly; 41, movable sleeve; 42, guide rod; 43, reset spring; 44, lower locking nut; 45, rain-proof nut; 46, lower limit clamping plate; 47, upper limit clamping plate; 48, mounting hole; 49, U-shaped bayonet; 5, oil cylinder. Specific embodiments

[0038] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0039] Please refer to Figures 1 to 11 , an automatic clamping assembly for a sounding rod used in static cone penetration, including a moving beam 2 that drives the sounding rod to move up and down. Two conical sounding rod placement holes 21 that are radially symmetric are provided at the center of the moving beam 2. A clamping sleeve 3 that cooperates with the sounding rod placement hole 21 is placed in the sounding rod placement hole 21. The moving beam 2 drives the sounding rod to perform penetration or extraction operations through its up and down movement. The cooperation between the conical sounding rod placement hole 21 and the clamping sleeve 3 can ensure the stable placement of the sounding rod in the moving beam 2, and through the clamping action of the clamping sleeve 3, the stable clamping of the sounding rod is realized.

[0040] Counterbores are vertically provided on both sides of the sounding rod placement hole 21, and an elastic reset assembly 4 is installed in the counterbores. When the moving beam 2 moves up or down, the elastic reset assembly makes the clamping sleeve closely adhere to the sounding rod. The presence of the elastic reset assembly 4 ensures that during the movement of the moving beam 2, the clamping sleeve 3 can maintain a stable fitting state with the sounding rod, preventing the clamping sleeve 3 from detaching from the sounding rod placement hole 21 due to external forces, thereby ensuring the stability and operation efficiency of the sounding rod.

[0041] The sounding rod 100 includes a first-section sounding rod body 101, a second-section sounding rod body 102, a sounding rod intermediate joint 1 that threadedly connects the first-section sounding rod body and the second-section sounding rod body, a female joint 104 connected to the upper end of the first-section sounding rod body 101, and a male joint 103 connected to the lower end of the second-section sounding rod body 102. The total effective length of the sounding rod is 1 meter. After multiple sounding rods are connected, the distance between two adjacent lower conical surfaces or upper conical surfaces is 0.5 meter. The stroke of the matching double oil cylinders is also 0.5 meter. In this way, each stroke of the oil cylinder drives the clamping sleeve in the moving crossbeam to clamp the sounding rod, realizing the penetration or extraction of the sounding rod. Both ends of the intermediate joint 1 are provided with a threaded connection section 11 and a transition section 12 that respectively cooperate with the internal thread of the sounding rod. The outer diameter of the transition section 12 is greater than the outer diameter of the sounding rod, and both ends of the transition section 12 are provided with conical clamping surfaces 13. The minor diameter of the conical clamping surfaces 13 is equal to the outer diameter of the sounding rod. The sounding rod intermediate joint 1 is stably connected to the sounding rod through the threaded connection section 11 to ensure the tight fit between the two. The design of the transition section 12 and the conical clamping surfaces 13 enables the sounding rod to be more tightly clamped by the clamping sleeve during subsequent operations, preventing slipping due to insufficient clamping force during penetration or extraction.

[0042] The upper end of the first-section sounding rod body and the lower end of the second-section sounding rod body are provided with a female coupling joint 104 and a male coupling joint 103. The threaded cooperation between the male coupling joint 103 and the female coupling joint 104 can realize the connection of adjacent sounding rods and form a joint with the same outer shape and size as the intermediate joint, which is convenient for realizing continuous standardized operations.

[0043] The advantages of the above-mentioned sounding rod are as follows: The wall thickness at the joints of the sounding rod intermediate joint, male coupling joint, and female coupling joint is greater than the wall thickness of the traditional sounding rod body, effectively increasing the strength of the sounding rod joint and preventing the sounding rod from breaking at the joint due to excessive pressure; Since the outer diameters of the sounding rod intermediate joint, male coupling joint, and female coupling joint are greater than the outer diameter of the sounding rod body, the contact area between the sounding rod and the formation is reduced, the frictional resistance between the sounding rod and the formation is lowered, and the penetration ability of the sounding test is improved; At the same time, the guiding property of the sounding rod during the penetration into the formation is also increased, preventing the sounding rod from bending and breaking; In addition, the above-mentioned automatic clamping assembly for the sounding rod can realize automatic clamping of the sounding rod without the phenomenon of rod slipping.

[0044] Further preferably, the elastic reset assembly 4 is placed in a counterbore in the moving beam 2. It includes a movable sleeve 41 and a guide rod 42 installed inside the movable sleeve 41. A reset spring 43 is provided between the lower end of the guide rod 42 and the bottom of the movable sleeve 41. The lower end of the guide rod 42 extends out of the moving beam 2, and a lower locking nut 44 is fitted on the guide rod 42 below the moving beam 2; the upper part of the movable sleeve 41 extends out of the moving beam 2, and an upper locking nut is screwed on the movable sleeve 41 above the moving beam 2. The upper locking nut is preferably a rainproof nut 45. A lower limit card plate 46 is provided between the locking nut 44 and the moving beam 2; an upper limit card plate 47 is provided between the rainproof nut 45 and the moving beam 2. Through the limitation of the counterbore of the moving beam and the reset function of the reset spring 43, the movable sleeve 41 and the guide rod 42 can automatically return to their original positions after being extended out of the moving beam under the action of an external force. The settings of the locking nut 44, the rainproof nut 45, the lower limit card plate 46 and the upper limit card plate 47 ensure the precise control of the reset assembly 4 over the clamping sleeve 3, so as to ensure that when the adjacent probe rod joints composed of the intermediate joint or the male coupling joint and the female coupling joint pass through the clamping sleeve 3, the clamping sleeve and the probe rod always remain in close contact, and the clamping force on the probe rod is moderate and stable.

[0045] Preferably, the lower limit card plate and the upper limit card plate are oblong, and one end thereof is provided with a mounting hole 48.

[0046] Preferably, the lower limit card plate and the upper limit card plate are semi-circular, one end thereof is provided with a mounting hole, and the other end is provided with a U-shaped bayonet 49, and the U-shaped bayonet 49 is stuck on the movable sleeve on the opposite side. Please refer to Figure 12 .

[0047] Further preferably, a conical clamping surface 34 is provided in the inner hole at the large-diameter end of the clamping sleeve, which is beneficial to the clamping of the probe rod and ensures concentricity. A guiding conical surface is also provided at the small-diameter inner hole end of the clamping sleeve, which is convenient for the passage of the probe rod joint and at the same time jacks up the clamping sleeve.

[0048] The clamping sleeve 3 is of a split structure and includes two semi-conical clamping sleeve monomers 32 with the same structure. The split structure makes the installation and disassembly of the clamping sleeve 3 more convenient. Further preferably, anti-slip grooves 33 are provided on the inner surface of the clamping sleeve 3. The design of the anti-slip grooves 33 increases the friction force between the clamping sleeve 3 and the probe rod, making the clamping more stable and reliable, and effectively preventing the clamping failure problem caused by the sliding of the probe rod during the penetration or extraction process.

[0049] Example 2. Please refer to Figures 9 to 11, in this embodiment, the clamping sleeve has a split structure and includes two identical square conical clamping sleeve monomers. A roller 31 is provided on the inner wall of the probe rod placement hole, and the roller abuts against the inclined surface of the square conical clamping sleeve monomer. Changing the sliding friction to rolling friction reduces the frictional resistance, which is beneficial for the clamping sleeve to clamp and release the probe rod.

[0050] Working principle of the present utility model: When the probe rod is lifted, the clamping sleeve is placed in the placement hole on the moving beam, and the clamping sleeve is tightly supported by the reset assembly.

[0051] When the lower conical surface of the transition joint on the probe rod mates with the large inner conical surface of the clamping sleeve, and the outer conical surface of the clamping sleeve mates with the upper conical surface of the probe rod placement hole, the probe rod is clamped. As the oil cylinder 5 rises, the probe rod is lifted. After reaching the maximum stroke, the pneumatic or hydraulic fixture on the oil cylinder base clamps the probe rod to prevent the probe rod from slipping. Then the piston rod of the oil cylinder retracts, the probe rod remains stationary, and the clamping sleeve on the moving beam disengages from the probe rod. Due to the action of the reset assembly, the clamping sleeve and the moving beam move down together with the piston rod of the oil cylinder. When the small diameter of the clamping sleeve encounters the upper edge of the transition joint (or the transition joint formed by the male joint of the probe rod and the female joint of another probe rod), it drives the clamping sleeve to move upward, pushing the upper limit card plate and the movable sleeve of the reset assembly upward until the inner diameter of the clamping sleeve adapts to the large diameter of the transition section. When the piston rod of the oil cylinder fully retracts, the lower conical surface of the probe rod transition section just mates with the large inner conical surface of the clamping sleeve. At this time, loosen the pneumatic or hydraulic fixture on the oil cylinder base, switch the oil circuit of the oil cylinder, the piston rod of the oil cylinder drives the moving beam to rise, the clamping sleeve and the reset assembly in the moving beam move down and clamp the probe rod, and the large inner conical surface of the clamping sleeve pushes the lower conical surface of the probe rod transition joint, so that the probe rod rises together with the piston rod of the oil cylinder, and the redundant probe rod is removed in time during the rising process of the probe rod. In this way, the probe rod is gradually lifted.

[0052] When the lower conical surface of the transition joint on the probe rod does not mate with the large inner conical surface of the clamping sleeve, the small inner diameter of the clamping sleeve clamps the probe rod at the same time. When the upward pulling force of the probe rod is not large, the probe rod can also rise with the moving beam. When the moving beam rises to the highest point, it starts to descend, and the process is the same as above.

[0053] When the probe rod is pressed down, the clamping sleeve is placed in the probe rod placement hole below the moving beam. At this time, the large inner conical table of the clamping sleeve is at the lower side, and the lower limit card plate of the reset assembly is used to tightly support the clamping sleeve, so that the inside of the clamping sleeve abuts against the probe rod and the outside abuts against the probe rod placement hole. Start the oil cylinder, and the moving beam moves downward. There are two position relationships between the probe rod and the clamping sleeve, and there are two situations:

[0054] In the first case, when the large inner conical surface of the clamping sleeve does not abut against the upper conical surface of the transition joint of the probe rod, the clamping sleeve and the placement hole move relative to each other. The clamping sleeve clamps and drives the probe rod to move downward. This case is suitable for relatively soft formations. When encountering a relatively hard formation, when the frictional force between the clamping sleeve and the probe rod is less than the reaction force of the probe rod, relative movement (slipping) will occur between the clamping sleeve and the probe rod, and thus the downward pressure of the probe rod cannot be guaranteed.

[0055] In the second case, when the large inner conical surface of the clamping sleeve abuts against the upper conical surface of the transition joint of the probe rod, the probe rod drives the clamping sleeve to move relatively upward in the placement hole. The outer conical surface of the clamping sleeve abuts against the conical surface of the placement hole to clamp the clamping sleeve and drive the probe rod to move downward. In this case, regardless of the hardness of the formation, relative movement (slipping) between the clamping sleeve and the probe rod will not occur.

[0056] When the piston rod of the oil cylinder fully retracts and the moving crossbeam reaches the lowest position, the oil circuit of the oil cylinder is reversed, and the piston rod drives the moving crossbeam to start rising. The clamping sleeve inside the moving crossbeam will move relatively downward, and the reset assembly keeps the clamping sleeve and the probe rod in a loose contact state. The probe rod remains stationary while the moving crossbeam rises. When encountering the lower conical surface of the transition joint, the clamping sleeve inside the moving crossbeam will continue to move downward until the large diameter of the transition joint passes through the clamping sleeve, while stretching the reset assembly. When the transition joint completely passes through the clamping sleeve and the reset assembly makes the large inner conical surface of the clamping sleeve abut against the upper conical surface of the transition joint, the moving crossbeam also reaches the highest position. At this time, the oil circuit of the oil cylinder is reversed again, the clamping sleeve in the moving crossbeam clamps the probe rod, and starts to descend with the moving crossbeam, and the probe rod is added in time. Repeating this process realizes the penetration operation of the sounding.

[0057] In summary, the present utility model can cooperate with the clamping sleeve by adding an intermediate joint of the probe rod to avoid the problem of slipping due to insufficient clamping force. At the same time, adding the elastic reset assembly can realize the continuous penetration or extraction operation of the probe rod. The automatic clamping assembly of the probe rod of the present utility model has the advantages of reasonable structure, stable clamping, strong adaptability, simple operation, safety and reliability, etc., and can meet the high-efficiency clamping requirements of the probe rod during penetration or extraction.

[0058] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic clamping assembly for a sounding rod used in static cone penetration test, characterized in that: It includes a moving beam that drives the sounding rod to move up and down. There are two conical sounding rod placement holes that are radially symmetrically arranged at the center of the moving beam. A sounding rod clamping sleeve that matches the sounding rod placement hole is placed in the sounding rod placement hole. Counterbores are vertically provided on both sides of the sounding rod placement hole. An elastic reset component is installed in the counterbore. When the moving beam moves up or down, the elastic reset component causes the clamping sleeve to clamp the sounding rod.

2. The automatic sounding rod clamping component for static cone penetration test according to claim 1, characterized in that: The elastic reset component includes a movable sleeve and a guide rod installed in the movable sleeve. A reset spring is provided between the guide rod and the bottom of the movable sleeve. The lower end of the guide rod extends out of the moving beam. A lower locking nut is fitted on the guide rod below the moving beam. The upper part of the movable sleeve extends out of the moving beam. An upper locking nut is screwed on the movable sleeve above the moving beam. A lower limit card plate is provided between the lower locking nut and the moving beam. An upper limit card plate is provided between the upper locking nut and the moving beam.

3. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 2, wherein: The upper locking nut is a rainproof nut.

4. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 2, wherein: The lower limit card plate and the upper limit card plate are oblong. One end is provided with a mounting hole.

5. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 2, wherein: The lower limit card plate and the upper limit card plate are semi-circular. One end is provided with a mounting hole and the other end is provided with a U-shaped bayonet.

6. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 1, characterized in that: The inner hole at the large-diameter end of the clamping sleeve is provided with a conical clamping surface.

7. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 1, wherein: The clamping sleeve is of a split structure and includes two semi-conical clamping sleeve monomer units with the same structure.

8. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 1, wherein: The clamping sleeve is of a split structure and includes two square-conical clamping sleeve monomer units with the same structure.

9. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 8, characterized in that: Roller shafts are provided on the inner wall of the sounding rod placement hole. The roller shafts are in contact with the inclined surfaces of the square-conical clamping sleeve monomer units.

10. The automatic clamping assembly for the sounding rod used in static cone penetration test according to claim 1, wherein: The inner surface of the clamping sleeve is provided with anti-slip grooves.

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