Gravity penetration test device

Abstract

The utility model provides a gravity penetration test device which comprises a support, a detection piece arranged on one side of the support, and a power device and a heavy hammer which are installed on the support, the detection piece comprises a probe and a probe rod, the probe rod is coaxially provided with a limiting rod in an extending mode, and the heavy hammer is of a hollow cylindrical structure and is arranged outside the limiting rod in a sleeved mode. And the power device is detachably connected with the heavy hammer. The heavy hammer is automatically controlled to move in the vertical direction through the driving device, the power device is detachably connected with the heavy hammer, when the heavy hammer is located on the impact face, the power device is fixedly connected with the heavy hammer, and when the heavy hammer ascends to the set falling height, the power device is separated from the heavy hammer, and therefore the heavy hammer can periodically and automatically fall, and the impact force of the heavy hammer is greatly improved. The probe rod is impacted, so that the probe drills downwards, the work of manually operating a heavy hammer is avoided, the manual requirement and the manual labor amount are greatly reduced, potential safety hazards are reduced, and higher detection precision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gravity penetration equipment, in particular to a gravity penetration test device. Background Art

[0002] With the increase of infrastructure investment, construction projects have sprung up like mushrooms after rain. For shallow foundation projects, the bearing capacity of the foundation is usually tested by plate load test, which takes a long time and requires high manpower and material resources. The dynamic penetration test can detect the bearing capacity of shallow foundations simply and quickly, and the cost is low, so it has gradually been used more in the work of testing the bearing capacity of foundations.

[0003] Dynamic probing is a type of dynamic testing test, namely the cone dynamic probing test, which is generally referred to as dynamic probing or dynamic probing. The probe of the dynamic probing test is cone-shaped. During the test, a heavy hammer of a certain mass is used to drive a standard-specification probe connected to the probe rod into the soil. The mechanical properties of the soil are judged based on the number of hammer blows required when the probe penetrates 10cm or 30cm into the soil. Dynamic probing is divided into three types of tests: light, heavy and extra-heavy. The weights of the three heavy hammers are 10kg, 63.5kg and 120kg respectively. Since the dynamic probing equipment is simple and easy to use, it is widely used to provide shallow foundation bearing capacity and deformation modulus; to test the compaction degree of foundation soil; to test whether there is an underlying soft layer in the base, etc.

[0004] Traditional dynamic probing is a simple probe rod with a heavy hammer on the top of the probe rod. After the probe rod is placed vertically at the detection position, the staff holds the probe rod steady and manually lifts the heavy hammer to a certain height, then lets it fall and hits the protruding impact part on the probe rod, completing the operation. This manual operation requires a large number of workers to operate at the same time, consumes a lot of manpower, and also has great safety hazards. Therefore, a better dynamic probing equipment is needed. Utility Model Content

[0005] In view of the deficiencies existing in the prior art, the utility model provides a gravity penetration test device, which solves the problem that the manual operation method in the prior art requires a large number of workers to operate simultaneously, consumes a large amount of manpower, and also has great safety hazards.

[0006] According to an embodiment of the utility model, a gravity penetration test device comprises a bracket, a detection member arranged on one side of the bracket, and a power device and a weight installed on the bracket. The weight is driven to rise by the power device and then falls freely to apply an impact force to the detection member. The detection member comprises a probe and a probe rod. The probe is a conical member with a downwardly pointed tip. The probe is coaxially arranged on the top of the probe rod. The diameter of the top end of the probe rod is increased to form an impact surface.

[0007] A limit rod is coaxially extended above the impact surface of the probe rod. The weight is a hollow cylindrical structure. The weight is sleeved on the outside of the limit rod so that it can move vertically along the limit rod. The power device is detachably connected to the weight. When the weight is located on the impact surface, the power device is fixedly connected to the weight. When the weight rises to a set falling height, the power device is separated from the weight.

[0008] Furthermore, the bracket includes a base, a vertically arranged support rod and a pulley frame arranged on the top of the support rod, and the detection member is arranged in parallel with the support rod, so that the probe of the detection member penetrates the base and extends into the ground.

[0009] Furthermore, the power device includes a servo motor and a connecting part. The servo motor is fixedly arranged at the bottom of the bracket. The output shaft of the servo motor is connected to a spool. A steel wire rope is wound around the spool. The steel wire rope extends to the position of the limit rod through the support of several pulleys on the pulley frame at the top of the bracket, and is connected to the connecting part, which is suspended above the heavy hammer.

[0010] Furthermore, a hollow area having a diameter larger than that of the limiting rod is provided near the upper end of the weight, and a concave clamping ring is provided on the top end surface of the weight, so that the inner diameter of the clamping ring is larger than the diameter of the limiting rod and smaller than the inner diameter of the hollow area;

[0011] The connecting member comprises a first sleeve ring and a second sleeve ring which are arranged in sequence from bottom to top, the first sleeve ring and the second sleeve ring are both movably sleeved on the limiting rod, a plurality of adjusting rods are arranged around the outside of the first sleeve ring along the circumferential direction, one end of the adjusting rod is rotatably connected to the outside of the first sleeve ring, and the rotating surface passes through the axis of the limiting rod, and a rotating rod is respectively arranged on the outside of the second sleeve ring corresponding to the adjusting rod, and the two ends of the rotating rod are respectively rotatably connected to the second sleeve ring and the middle part of the adjusting rod, so that when the second sleeve ring moves relative to the first sleeve ring, the rotating angle of the adjusting rod can be changed by the rotating rod, so that the distance between the top end of the adjusting rod and the limiting rod is greater than or less than the inner diameter of the clamping ring;

[0012] The mass of the second ring is much smaller than that of the first ring and the adjusting rod.

[0013] Furthermore, a limiting sleeve is provided on the limiting rod at a position corresponding to the falling height of the weight, and the outer diameter of the limiting sleeve is smaller than the inner diameter of the clamping ring.

[0014] Furthermore, the bracket also includes two symmetrically arranged reinforcing rods, one end of which is fixedly connected to the outside of the base, and the other end of which is connected to the top of the support rod to form a relative triangular structure.

[0015] Furthermore, a horizontal hanging piece is coaxially arranged above the top of the limiting rod, the top of the hanging piece is connected to the wire rope, and transition ropes are evenly arranged on the edges around it, and the bottom end of the transition rope is connected to the outside of the first ring.

[0016] Furthermore, a fixing sleeve is connected to the support rod, and the fixing sleeve is coaxially arranged with the probe rod, and the probe rod passes through the fixing sleeve to obtain horizontal limitation.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model automatically controls the movement of the weight in the vertical direction through the driving device, and the power device is detachably connected to the weight. When the weight is located on the impact surface, the power device is fixedly connected to the weight. When the weight rises to a set falling height, the power device is separated from the weight, so that the weight can fall periodically by itself to impact the probe rod, so that the probe drills downward. Therefore, the work of manually operating the weight is eliminated, which not only greatly reduces the labor demand and labor workload, but also reduces safety hazards and has higher detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front schematic diagram of an embodiment of the utility model.

[0020] Figure 2 It is a right side schematic diagram of an embodiment of the utility model.

[0021] Figure 3 It is a cross-sectional schematic diagram of the connecting member and the heavy hammer in the separated state in the embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of the connection piece relative to the heavy hammer when it is acted upon by the limiting sleeve according to the embodiment of the utility model.

[0023] In the above drawings: 1. bracket; 2. probe; 3. probe rod; 4. limit rod; 5. weight; 6. connector; 7. wire rope; 8. servo motor; 11. base; 12. support rod; 13. pulley frame; 14. reinforcing rod; 31. impact surface; 41. limit sleeve; 51. hollow area; 52. clamping ring; 61. first set of rings; 62. second set of rings; 63. adjusting rod; 64. rotating rod; 71. lifting plate; 72. transfer rope. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1As shown, the embodiment of the utility model proposes a gravity penetration test device, including a bracket 1, a detection member arranged on one side of the bracket 1, and a power device and a weight 5 installed on the bracket 1. The weight 5 is driven to rise by the power device, and then falls freely to apply an impact force to the detection member. In this embodiment, the bracket 1 includes a base 11, a vertically arranged support rod 12, and a pulley frame 13 arranged on the top of the support rod 12. The detection member and the support rod 12 are arranged in parallel, so that the probe 2 of the detection member passes through the base 11 and extends into the ground.

[0026] like Figure 2 As shown, as a preferred embodiment, the bracket 1 further includes two symmetrically arranged reinforcing rods 14, one end of which is fixedly connected to the outside of the base 11, and the other end is connected to the top of the support rod 12, forming a relative triangular structure. This increases the stability of the bracket 1. In addition, a fixing sleeve is also connected to the support rod 12, and the fixing sleeve is coaxially arranged with the probe rod 3. The probe rod 3 passes through the fixing sleeve to obtain horizontal limit, thereby avoiding the problem of the probe rod 3 tilting.

[0027] In this embodiment, the detection member includes a probe 2 and a probe rod 3. The probe 2 is a conical member with the tip facing downward. The probe 2 is coaxially arranged on the top of the probe rod 3. The top diameter of the probe rod 3 is increased to form an impact surface 31. A limit rod 4 is coaxially extended above the impact surface 31 of the probe rod 3. The weight 5 is a hollow cylindrical structure. The weight 5 is sleeved outside the limit rod 4 so that it can move vertically along the limit rod 4.

[0028] The power device includes a servo motor and a connecting member 6, wherein the servo motor is fixedly arranged at the bottom of the bracket 1, and the output shaft of the servo motor is connected to a bobbin, and a steel wire rope 7 is wound around the bobbin, and the steel wire rope 7 is supported by a plurality of pulleys on the pulley frame 13 at the top of the bracket 1 and extends to the position of the limit rod 4, and is connected to the connecting member 6, and the connecting member 6 is suspended above the weight 5. The connecting member 6 is detachably connected to the weight 5, and the power device is fixedly connected to the weight 5 when the weight 5 is located on the impact surface 31, and the power device is separated from the weight 5 when the weight 5 rises to a set drop height.

[0029] In a specific solution, a hollow area 51 having a diameter larger than that of the limiting rod 4 is provided near the upper end of the weight 5, and a concave retaining ring 52 is provided on the top end face of the weight 5, so that the inner diameter of the retaining ring 52 is larger than the diameter of the limiting rod 4 and smaller than the inner diameter of the hollow area 51.

[0030] like Figure 3 , Figure 4As shown, correspondingly, the connecting member 6 includes a first ring 61 and a second ring 62 arranged in sequence from bottom to top, and the first ring 61 and the second ring 62 are just movably sleeved on the limit rod 4. The first ring 61 is provided with a plurality of adjustment rods 63 around the circumference of the outside, and one end of the adjustment rod 63 is rotatably connected to the outside of the first ring 61, and the rotation surface passes through the axis of the limit rod 4. The second ring 62 is provided with a rotating rod 64 corresponding to the adjustment rod 63 on the outside, and the two ends of the rotating rod 64 are respectively rotatably connected to the middle of the second ring 62 and the adjustment rod 63, so that when the second ring 62 moves relative to the first ring 61, the rotation angle of the adjustment rod 63 can be changed by the rotating rod 64, so that the distance between the top of the adjustment rod 63 and the limit rod 4 is greater than or less than the inner diameter of the clamp 52. In addition, the mass of the second ring 62 is much smaller than that of the first ring 61 and the adjustment rod 63. In this embodiment, the second ring 62 is made of plastic, and the first ring 61 and the adjustment rod 63 are both made of steel.

[0031] Correspondingly, a limiting sleeve 41 is further provided on the limiting rod 4 at a position corresponding to the falling height of the weight 5 , and the outer diameter of the limiting sleeve 41 is smaller than the inner diameter of the clamping ring 52 .

[0032] In a preferred solution, a horizontal hanging piece 71 is coaxially arranged above the top of the limit rod 4, the top of the hanging piece 71 is connected to the wire rope 7, and the edges are evenly provided with transfer ropes 72, and the bottom end of the transfer rope 72 is connected to the outside of the first ring 61. By connecting with the surrounding transfer rope 72, the force of the connecting member 6 can be more evenly applied, and the weight 5 can be better driven to move in the vertical direction.

[0033] The workflow of this embodiment is as follows:

[0034] When the heavy hammer 5 is located on the impact surface 31 after completing an impact, the connecting member 6 is located above the heavy hammer 5. Since the mass of the second ring 62 is extremely small compared with the first ring 61 and the adjusting rod 63, the adjusting rod 63 flips outward under the action of its own gravity.

[0035] The servo motor 8 drives the connecting member 6 to move downward through the steel wire 7. When the first ring 61 falls through the snap ring 52 and enters the hollow area 51, the adjusting rod 63 is blocked by the inner edge of the snap ring 52, and then rotates inward and also enters the hollow area 51. When the top of the adjusting rod 63 passes through the snap ring 52, it turns outward again under its own gravity to be close to the inner wall of the hollow area 51, so that the distance between its top and the limit rod 4 is greater than the inner diameter of the snap ring 52. Then the connecting rod rises, driving the adjusting rod 63 to rise until its top abuts against the bottom surface of the snap ring 52. At this time, the adjusting rod 63 cannot pass through the snap ring 52, so it drives the weight 5 to move upward as a whole.

[0036] When the weight 5 moves to the position of the limit sleeve 41, the limit sleeve 41 passes through the clamp ring 52 and enters the hollow area 51, and contacts the second ring 62. Since the limit sleeve 41 is fixed, the second ring 62 will move downward relative to the first ring 61 after being blocked by the limit sleeve 41 during the rising process, thereby driving the connecting rod to rotate and pulling the adjustment rod 63 to rotate inward, reducing the distance between the top of the adjustment rod 63 and the limit rod 4, and finally making the adjustment rod 63 pass through the clamp ring 52, losing the suspension support for the weight 5, and then the weight 5 falls by itself under the action of gravity and descends to the impact surface 31. Then repeat the above work until the gravity penetration test is completed.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gravity penetration test device, characterized in that: It includes a bracket, a detection member arranged on one side of the bracket, and a power device and a heavy hammer installed on the bracket. The heavy hammer is driven to rise by the power device and then falls freely to exert an impact force on the detection member. The detection member includes a probe and a probe rod. The probe is a conical member with a downward tip. The probe is coaxially arranged on the top of the probe rod. The top diameter of the probe rod is increased to form an impact surface. A limit rod is coaxially extended above the impact surface of the probe rod. The weight is a hollow cylindrical structure. The weight is sleeved on the outside of the limit rod so that it can move vertically along the limit rod. The power device is detachably connected to the weight. When the weight is located on the impact surface, the power device is fixedly connected to the weight. When the weight rises to a set falling height, the power device is separated from the weight.

2. A gravity penetration test device as claimed in claim 1, characterized in that: The bracket comprises a base, a vertically arranged support rod and a pulley frame arranged on the top of the support rod. The detection member is arranged in parallel with the support rod so that the probe of the detection member penetrates the base and extends into the ground.

3. A gravity penetration test device as claimed in claim 2, characterized in that: The power device includes a servo motor and a connecting piece. The servo motor is fixedly arranged at the bottom of the bracket. The output shaft of the servo motor is connected to a spool. A steel wire rope is wound around the spool. The steel wire rope is supported by a plurality of pulleys on a pulley frame at the top of the bracket and extends to the position of the limit rod. The steel wire rope is connected to the connecting piece, and the connecting piece is suspended above the heavy hammer.

4. A gravity penetration test device as claimed in claim 3, characterized in that: The weight is provided with a hollow area with a diameter larger than the limit rod near the upper end, and a concave clamping ring is provided on the top end surface of the weight, so that the inner diameter of the clamping ring is larger than the diameter of the limit rod and smaller than the inner diameter of the hollow area; The connecting member comprises a first sleeve ring and a second sleeve ring which are arranged in sequence from bottom to top, the first sleeve ring and the second sleeve ring are both movably sleeved on the limiting rod, a plurality of adjusting rods are arranged around the outside of the first sleeve ring along the circumferential direction, one end of the adjusting rod is rotatably connected to the outside of the first sleeve ring, and the rotating surface passes through the axis of the limiting rod, and a rotating rod is respectively arranged on the outside of the second sleeve ring corresponding to the adjusting rod, and the two ends of the rotating rod are respectively rotatably connected to the second sleeve ring and the middle part of the adjusting rod, so that when the second sleeve ring moves relative to the first sleeve ring, the rotating angle of the adjusting rod can be changed by the rotating rod, so that the distance between the top end of the adjusting rod and the limiting rod is greater than or less than the inner diameter of the clamping ring; The mass of the second ring is much smaller than that of the first ring and the adjusting rod.

5. A gravity penetration test device as claimed in claim 4, characterized in that: A limiting sleeve is also arranged on the limiting rod at a position corresponding to the falling height of the weight, and the outer diameter of the limiting sleeve is smaller than the inner diameter of the clamping ring.

6. A gravity penetration test device as claimed in claim 2, characterized in that: The bracket also includes two symmetrically arranged reinforcing rods, one end of which is fixedly connected to the outside of the base, and the other end of which is connected to the top of the supporting rod to form a relative triangular structure.

7. A gravity penetration test device as claimed in claim 4, characterized in that: A horizontal hanging piece is coaxially arranged above the top of the limit rod, the top of the hanging piece is connected to the wire rope, and transition ropes are evenly arranged on the edges around it, and the bottom end of the transition rope is connected to the outside of the first ring.

8. A gravity penetration test device as claimed in claim 2, characterized in that: The support rod is also connected with a fixing sleeve, which is coaxially arranged with the probe rod, and the probe rod passes through the fixing sleeve to obtain horizontal position limitation.

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