Standard penetration test device

Abstract

The utility model provides a standard penetration test device. The standard penetration test device comprises a mounting cylinder, a marker post is arranged on the mounting cylinder, a pulley is arranged at the top of the marker post, a penetration rod is arranged in the mounting cylinder in a penetrating manner, a hammering seat is fixedly arranged on the penetration rod, a piercing hammer is arranged on the penetration rod in a penetrating manner, the piercing hammer is positioned on the upper side of the hammering seat, a pull rope is arranged on the piercing hammer, and the pull rope bypasses the pulley; the counter comprises a counting assembly arranged on the mounting cylinder and a triggering piece in transmission connection with the counting assembly, and one end of the triggering piece is in contact with the piercing hammer; the limiting piece is arranged in the mounting cylinder and is used for ensuring that the feeler lever is overlapped with the axis of the mounting cylinder; the supporting piece is arranged on the mounting cylinder and is used for supporting the mounting cylinder; the number of times that the penetration rod is knocked by the piercing hammer is recorded through the counter arranged on the marker post, the triggering piece on the counter is triggered when the penetration rod is knocked by the piercing hammer, the number of times of knocking can be accurately recorded by recording once by the counter when the triggering piece is triggered once, and the problems of missed recording and wrong recording during manual recording are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering exploration, in particular to a standard penetration test device. Background Art

[0002] The standard penetration test is the most commonly used in-situ testing method in geotechnical engineering investigations, and the standard penetration test is often used in conjunction with drilling. During operation, a 63.5 kg core hammer is used to drop freely from a height of 76 cm to drive the penetrator 15 cm into the soil layer. The number of hammer blows for every 30 cm of penetration into the soil layer is recorded. This value is the measured hammer blow number N.

[0003] For example, the Chinese utility model with the announcement number CN220202631U discloses "a penetration measurement device for a standard penetration test". The device includes an indicator bracket, and a drill rod is arranged inside the indicator bracket; an indicator buckle is detachably arranged on the drill rod; a scale device is arranged on the indicator bracket for indicating the scale. The device is installed on the drill rod through the detachable indicator buckle to record the number of test blows, and the scale is indicated by five scale rings on the indicator bracket at intervals of 15cm, 10cm, 10cm, and 10cm from top to bottom, eliminating the need for workers to use a ruler to mark, ensuring high accuracy of test data and high test efficiency.

[0004] However, during the experiment, in addition to the insertion depth of the drill rod, the number of hammer blows also needs to be recorded. Currently, the number of hammer blows is recorded manually, which is prone to errors, resulting in incorrect data and affecting the accuracy of the experiment. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a standard penetration test device, which solves the problem in the prior art that the number of hammer blows is mostly recorded manually, which is prone to errors, resulting in data errors and affecting the accuracy of the experiment.

[0006] According to an embodiment of the present invention, a standard penetration test device includes a mounting tube, a benchmark rod is provided on the mounting tube, a pulley is provided on the top of the benchmark rod, a sounding rod is passed through the mounting tube, a hammer seat is fixedly provided on the sounding rod, a core hammer is passed through the sounding rod, the core hammer is located on the upper side of the hammer seat, a pull rope is provided on the core hammer, and the pull rope is passed around the pulley; a counter includes a counting assembly provided on the mounting tube and a trigger member transmission-connected to the counting assembly, one end of the trigger member contacts the core hammer, and the counting assembly is used to record the number of hammering times of the core hammer; a limit member is provided in the mounting tube, for ensuring that the sounding rod and the axis of the mounting tube overlap; a support member is provided on the mounting tube, for supporting the mounting tube.

[0007] Compared with the prior art, the present invention has the following beneficial effects: a counter arranged on the pole records the number of times the core hammer strikes the sounding rod, and a triggering member on the counter is triggered when the core hammer strikes the sounding rod. Each time the triggering member is triggered, the counter records the number of strikes, thereby accurately recording the number of strikes and avoiding the problems of omissions and errors in manual recording. The limiting member ensures the position of the sounding rod when it is struck, thereby avoiding the sounding rod from tilting during the striking process and requiring manual straightening so that it can be driven vertically into the soil layer, thereby improving the detection quality.

[0008] Preferably, the counting assembly includes a shell arranged on the benchmark, and a mounting shaft rotatably arranged in the shell, a driving arm and two sets of digital disks are provided on the mounting shaft, a ratchet is provided on one side of each digital disk, a driving claw is rotatably provided at one end of the driving arm, the driving claw is clamped on the corresponding ratchet, a compression spring is provided on the driving arm, and one end of the compression spring is connected to the shell.

[0009] Preferably, the trigger member includes a toggle arm rotatably arranged on the mounting shaft, a limiting column fixedly arranged on one side of the driving arm, a socket provided at one end of the toggle arm, the socket abuts against the limiting column, wherein a rectangular opening is opened on one side of the shell, and the end of the toggle arm away from the socket passes through the rectangular opening.

[0010] Preferably, a slot is provided on one of the ratchets.

[0011] Preferably, the driving claw includes a first claw and a second claw that are fixedly connected, wherein the first claw and the second claw correspond to the two ratchet wheels respectively.

[0012] Preferably, an observation port is provided on the shell.

[0013] Preferably, the limiting member includes a plurality of rolling members, each rolling member includes two groups of limiting wheels rotatably arranged in the mounting cylinder, wherein two adjacent rolling members are perpendicularly staggered with each other.

[0014] Preferably, the support member comprises a plurality of support frames hingedly connected to the mounting cylinder.

[0015] Preferably, one end of each support frame is hinged to a bottom plate.

[0016] Preferably, scale lines are provided on the marker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model.

[0018] Figure 2 It is a structural diagram of a counter in an embodiment of the present utility model.

[0019] Figure 3 Schematic diagram of the structure of the trigger member in the embodiment of the present utility model.

[0020] Figure 4 This is a structural diagram of a digital disk in an embodiment of the present utility model.

[0021] Figure 5 Schematic diagram of the structure of the driving claw in the embodiment of the present utility model.

[0022] Figure 6 Schematic diagram of the structure of the limiting member in the embodiment of the present utility model.

[0023] In the above drawings: 1. Mounting cylinder; 101. Marking rod; 102. Scale line; 103. Pulley; 104. Support frame; 105. Base plate; 106. Limiting wheel; 2. Feeling rod; 201. Hammer seat; 202. Pull rope; 203. Core hammer; 3. Shell; 301. Observation port; 302. Mounting shaft; 303. Toggle arm; 304. Clamping seat; 305. Rectangular opening; 4. Driving claw; 401. First clamping claw; 402. Second clamping claw; 5. Driving arm; 501. Digital dial; 502. Compression spring; 503. Ratchet; 504. Limiting column; 505. Slot. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 6 As shown, an embodiment of the present invention proposes a standard penetration test device, which includes a mounting tube 1, on which a benchmark 101 is arranged, a pulley 103 is arranged on the top of the benchmark 101, a sounding rod 2 is passed through the mounting tube 1, a hammer seat 201 is fixedly arranged on the sounding rod 2, a core hammer 203 is passed through the sounding rod 2, the core hammer 203 is located on the upper side of the hammer seat 201, a pull rope 202 is arranged on the core hammer 203, and the pull rope 202 is passed around the pulley 103; a counter includes a counting component arranged on the mounting tube 1 and a trigger member connected to the counting component in a transmission manner, one end of the trigger member is in contact with the core hammer 203, and the counting component is used to record the number of hammering times of the core hammer 203; a limit member is arranged in the mounting tube 1, for ensuring that the axis of the sounding rod 2 and the mounting tube 1 overlap; a support member is arranged on the mounting tube 1, for supporting the mounting tube 1.

[0026] The detailed working process of this embodiment is as follows: the function of the pulley 103 is to reduce the friction of the pull rope 202, and the pull rope 202 is used to connect the core hammer 203 and lift it; the number of times the core hammer 203 hits the probe rod 2 is recorded by a counter set on the benchmark 101, and the core hammer 203 hits the probe rod 2 when it hits the triggering member on the counter. Each time the triggering member is triggered, the counter records it once, and the number of knocks can be accurately recorded. The limit member ensures the accurate position of the probe rod 2 when it is knocked, and the support member supports the mounting tube 1 to keep it in the correct position.

[0027] During use, the mounting tube 1 is fixed by the support, and then the sounding rod 2 is inserted into the mounting tube 1, and then the core hammer 203 is passed through the sounding rod 2, and then the core hammer 203 is lifted to the highest point by the pull rope 202, and then dropped. The core hammer 203 will hit the hammer seat 201 of the sounding rod 2 to complete a knock. At the same time, when the core hammer 203 falls, it will contact the trigger part to complete a count, and the core hammer 203 is lifted back and forth to knock until the experiment is completed.

[0028] like Figure 2 As shown, the counting assembly includes a housing 3 set on the benchmark 101, and a mounting shaft 302 rotatably set in the housing 3, a driving arm 5 and two sets of digital disks 501 are set on the mounting shaft 302, and a ratchet 503 is set on one side of each digital disk 501. A driving claw 4 is rotatably set at one end of the driving arm 5, and the driving claw 4 is clamped on the corresponding ratchet 503. A compression spring 502 is set on the driving arm 5, and one end of the compression spring 502 is connected to the housing 3.

[0029] like Figure 2 and Figure 3 As shown, the trigger member includes a toggle arm 303 rotatably set on the mounting shaft 302, a limiting column 504 is fixedly set on one side of the driving arm 5, and a clamping seat 304 is set at one end of the toggle arm 303, and the clamping seat 304 abuts against the limiting column 504, wherein a rectangular opening 305 is opened on one side of the shell 3, and the end of the toggle arm 303 away from the clamping seat 304 passes through the rectangular opening 305.

[0030] like Figure 4 As shown, a slot 505 is defined on one of the ratchets 503 .

[0031] like Figure 5 As shown, the driving claw 4 includes a first claw 401 and a second claw 402 that are fixedly connected, wherein the first claw 401 and the second claw 402 correspond to the two ratchet wheels 503 respectively.

[0032] The detailed working process of this embodiment is as follows: the two sets of digital disks 501 are decimal. When the trigger is triggered once, one of the digital disks 501 rotates once. When it is transmitted ten times, the other digital disk 501 rotates once. Specifically, the corresponding ratchet 503 is driven to rotate by the driving claw 4. A drop is formed between the end of the first claw 401 and the end of the second claw 402. The end of the second claw 402 is longer. Under normal circumstances, the second claw 402 abuts against one of the ratchet wheels 503. By rotating the toggle arm 303, the driving arm 5 is driven to rotate. At this time, the compression spring 502 is compressed and stored. The driving arm 5 drives the driving claw 4 to move. When the driving claw 4 moves, the ratchet 503 in contact with it will be driven and rotated by the driving claw 4. When the toggle arm 3 After 03 loses the external force, the compression spring 502 releases its capacity, bringing the driving arm 5 and the toggle arm 303 back to the initial position, and the toggle arm 303 waits for the second contact with the piercing hammer 203 and is triggered again; and when triggered, one end of the toggle arm 303 is located on the moving path of the piercing hammer 203, and when the piercing hammer 203 falls, it contacts the toggle arm 303, and the toggle arm 303 rotates downward, while driving the driving arm 5 to rotate to complete the counting. When the piercing hammer 203 returns, the piercing hammer 203 drives the toggle arm 303 to rotate in the opposite direction until the piercing hammer 203 passes, and then the toggle arm 303 falls to the initial position under its own gravity (in this process, the toggle arm 303 does not trigger the rotation of the digital disk 501), waiting for the piercing hammer 203 to be triggered again.

[0033] When one of the number disks 501 rotates nine times, the second pawl 402 falls into the slot 505 of the ratchet 503 abutting it. At this time, the first pawl 401 and the second pawl 402 abut against the corresponding ratchet 503 at the same time. At this time, when the driving arm 5 rotates, it will drive the two ratchet wheels 503 to rotate synchronously once. During the next rotation, the second pawl 402 disengages from the slot 505 of the ratchet 503, causing the first pawl 401 to separate from the corresponding ratchet 503. At this time, only the second pawl 402 abuts against the corresponding ratchet 503. During driving, only one number disk 501 rotates. In this way, every time one of the number disks 501 rotates ten times, the other number disk 501 rotates once, completing a two-digit count.

[0034] like Figure 2 As shown, an observation port 301 is provided on the housing 3 .

[0035] The detailed working process of this embodiment is as follows: the observation port 301 is used to observe the counting status of the two number disks 501.

[0036] like Figure 6 As shown, the limiting member includes multiple groups of rolling members, each of which includes two groups of limiting wheels 106 rotatably arranged in the installation cylinder 1, wherein two adjacent rolling members are vertically staggered with each other.

[0037] The detailed working process of this embodiment is as follows: the plurality of groups of limiting wheels 106 are used to limit the feeler rod 2 to prevent the feeler rod 2 from tilting when going deeper, and the purpose of the vertical interlacing is to improve the limiting accuracy.

[0038] like Figure 1 As shown, the support member includes multiple groups of support frames 104 hinged on the mounting cylinder 1.

[0039] The detailed working process of this embodiment is as follows: the function of the support frame 104 is to support the installation cylinder 1, and the support frame 104 can be stored for easy transportation.

[0040] like Figure 1 As shown, one end of each support frame 104 is hinged to a bottom plate 105 .

[0041] The detailed working process of this embodiment is as follows: the function of the bottom plate 105 is to increase the contact surface with the ground and prevent the support frame 104 from sinking into the soil.

[0042] like Figure 1 As shown, a scale mark 102 is provided on the marker rod 101 .

[0043] The detailed working process of this embodiment is as follows: the scale lines 102 can enable the observer to quickly and intuitively see the changes in the measurement parameters, which is convenient for recording and analyzing data.

[0044] The implementation principle of the embodiment of the present application is: when in use, the installation tube 1 is fixed by the support frame 104, and then the sounding rod 2 is inserted into the installation tube 1, and then the core hammer 203 is passed through the sounding rod 2, and then the core hammer 203 is lifted to the highest point by the pull rope 202, and then dropped. The core hammer 203 will hit the hammer seat 201 of the sounding rod 2 to complete one knock. At the same time, when the core hammer 203 falls, it will contact the toggle arm 303 and drive it to rotate to complete one counting. The core hammer 203 is lifted back and forth to knock until the experiment is completed. Finally, the numbers on the two digital disks 501 are read from the observation port 301 to obtain the number of knocks.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this 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 standard penetration test device, characterized in that: include: A mounting tube (1) is provided with a pole (101) on it, a pulley (103) is provided on the top of the pole (101), a feeler rod (2) is passed through the mounting tube (1), a hammer seat (201) is fixedly provided on the feeler rod (2), a core hammer (203) is passed through the feeler rod (2), the core hammer (203) is located on the upper side of the hammer seat (201), a pull rope (202) is provided on the core hammer (203), and the pull rope (202) is passed around the pulley (103); A counter comprising a counting assembly arranged on the mounting cylinder (1) and a triggering member in transmission connection with the counting assembly, one end of the triggering member being in contact with the core-piercing hammer (203), and the counting assembly being used to record the number of hammerings of the core-piercing hammer (203); A limiting member is provided in the installation tube (1) and is used to ensure that the axis of the feeler rod (2) and the axis of the installation tube (1) overlap; A support member is provided on the mounting tube (1) and is used to support the mounting tube (1).

2. The standard penetration test device according to claim 1, characterized in that: The counting assembly comprises a housing (3) arranged on the pole (101), and a mounting shaft (302) rotatably arranged in the housing (3); a driving arm (5) and two sets of digital disks (501) are arranged on the mounting shaft (302); a ratchet (503) is arranged on one side of each digital disk (501); a driving claw (4) is rotatably arranged at one end of the driving arm (5); the driving claw (4) is clamped on the corresponding ratchet (503); a compression spring (502) is arranged on the driving arm (5); and one end of the compression spring (502) is connected to the housing (3).

3. The standard penetration test device according to claim 2, characterized in that: The trigger member comprises a toggle arm (303) rotatably arranged on the mounting shaft (302); a limiting column (504) is fixedly arranged on one side of the driving arm (5); a clamping seat (304) is arranged at one end of the toggle arm (303); the clamping seat (304) abuts against the limiting column (504); wherein a rectangular opening (305) is opened on one side of the housing (3); and an end of the toggle arm (303) away from the clamping seat (304) passes through the rectangular opening (305).

4. The standard penetration test apparatus according to claim 2, characterized in that: A slot (505) is provided on one of the ratchets (503).

5. The standard penetration test apparatus according to claim 4, characterized in that: The driving claw (4) comprises a first claw (401) and a second claw (402) that are fixedly connected, wherein the first claw (401) and the second claw (402) correspond to the two ratchet wheels (503) respectively.

6. The standard penetration test apparatus according to claim 3, characterized in that: An observation port (301) is provided on the housing (3).

7. The standard penetration test apparatus according to claim 1, characterized in that: The limiting member includes a plurality of rolling members, each of the rolling members includes two groups of limiting wheels (106) rotatably arranged in the mounting cylinder (1), wherein two adjacent rolling members are vertically staggered with each other.

8. The standard penetration test apparatus according to claim 1, characterized in that: The support member comprises a plurality of support frames (104) hingedly connected to the mounting cylinder (1).

9. The standard penetration test apparatus according to claim 8, characterized in that: One end of each support frame (104) is hingedly connected to a bottom plate (105).

10. The standard penetration test device according to claim 1, characterized in that: The marker rod (101) is provided with scale lines (102).

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