Automatic counting device for dynamic sounding detection

By combining and adjusting the rotating, folding, and telescopic components of the support frame, the problem of instability in dynamic penetration tests in complex environments was solved, enabling accurate counting of penetration hammer blows and extended distance measurement, thus adapting to complex construction environments.

CN223910647UActive Publication Date: 2026-02-13HUIZHOU DAYU ENG QUALITY TESTING CENT CO LTD
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Patent Information

Application Number
CN202520927550.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2026-02-13
Estimated Expiration
2035-05-13

AI Technical Summary

Technical Problem

Existing dynamic penetration tests lack flexible base adjustment in complex construction environments, leading to instability and affecting the accuracy of penetration hammer counts.

Method used

The support base of the support frame is adjusted by a combination of rotating, folding and telescopic components to make the support legs flexible and adaptable, ensuring that the dynamic penetration test is carried out in a stable state, and the accuracy is improved by the distance measuring and automatic counting device of the weight assembly.

Benefits of technology

In complex construction environments, the support frame can stably support the hammer assembly, improve the accuracy of automatic counting of penetration hammer blows, and expand the ranging range of dynamic penetration tests.

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Abstract

The utility model is applicable to the field of foundation bearing capacity performance test, and provides an automatic counting device for dynamic penetration test, a heavy hammer assembly and a support frame, the heavy hammer assembly is used for dynamic penetration test, and distance measurement and automatic counting are carried out through a measuring sleeve included in the heavy hammer assembly; the supporting frame is installed on the surface of a foundation and used for supporting the lifting hammer assembly. The supporting frame comprises an upper support and a supporting base. The supporting base comprises a base plate and unit supporting legs; the multiple unit supporting legs are distributed at the bottom of the base plate in an array mode. Each unit supporting leg comprises a rotating piece, a folding piece and a telescopic piece; the rotating piece is used for transversely and horizontally rotating and adjusting the folding piece and the telescopic piece; the folding piece is assembled on the rotating piece and used for longitudinally folding and adjusting the telescopic piece up and down; and after the rotating piece, the folding piece and the telescopic piece are combined and adjusted, a plurality of unit supporting legs can be twisted and adjusted, so that the device can flexibly adapt to a complex construction environment, and a dynamic penetration test can be in a stable state.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foundation bearing capacity performance test, especially relates to a power sounding detection automatic counting device. BACKGROUND

[0002] The foundation bearing capacity is the bearing potential of the unit area of the foundation soil with the increase of the load; the foundation bearing capacity detection includes the plate load test, the spiral plate load test, the standard penetration test, the dynamic sounding test and the static sounding test and the like; wherein, the dynamic sounding test (DPT) is a kind of in-situ test method commonly used in geotechnical engineering investigation.

[0003] The dynamic sounding test uses certain drop hammer mass to hit the probe of certain size and shape into the soil, and judges the soil layer name and engineering property according to the difficulty of penetration, i.e.

[0004] Therefore, the power sounding detection automatic counting device is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model embodiment is to provide a kind of power sounding detection automatic counting device, to solve the problem that in the process of dynamic sounding test, penetration hammering number is an important factor needing to be considered importantly;But the existing dynamic sounding test in the face of complex construction environment process, since there is no specific environment to flexibly adjust base, it is easy to cause dynamic sounding test to be in unstable state, and then influence the counting accuracy of penetration hammering number.

[0006] Specifically, the automatic counting device for dynamic sounding detection comprises a weight assembly, a steel rope, a support frame and a winch; the weight assembly is used for dynamic sounding test and distance measurement and automatic counting through a measuring sleeve contained therein; the steel rope is arranged on the top of the weight assembly and is used for periodically lifting the weight assembly; the support frame is installed on the ground surface and is used for supporting the weight assembly and the steel rope; the winch is installed on the support frame and is power transmission connected with the steel rope and is used for providing power for lifting the steel rope; wherein, the support frame comprises an upper support and a support base; the upper support is installed on the support base; the upper support is used for supporting the steel rope and the weight assembly; the support base is used for supporting on the ground; the support base comprises a base plate and unit support legs; the base plate is arranged on the bottom of the upper support; the unit support legs are arranged in an array on the bottom of the base plate; the unit support leg comprises a rotating part, a folding part and an extension part; the rotating part is used for horizontally rotating to adjust the folding part and the extension part; the folding part is arranged on the rotating part and is used for vertically folding to adjust the extension part; after the rotating part, the folding part and the extension part are combined and adjusted, the local unit support legs are twisted and adjusted to adapt to the complex construction environment.

[0007] The support base on the support frame is erected on the foundation in the construction area; during the process, the support base is adjusted in the mode by using the unit support legs, that is, the rotating part is used for horizontally rotating to adjust the folding part and the extension part; the folding part is used for vertically folding to adjust the extension part; after the rotating part, the folding part and the extension part are combined and adjusted, the local unit support legs are twisted and adjusted to adapt to the complex construction environment, which is beneficial to keeping the dynamic sounding test in a stable state and improving the accuracy of automatic counting of the number of impact hammers in the distance measurement and dynamic sounding test of the weight assembly.

[0008] The technical scheme of the present application is further described as follows:

[0009] In one embodiment, the rotating part comprises:

[0010] A fixed column is arranged on the base plate;

[0011] A limiting ring is rotatably arranged on the fixed column;

[0012] A limiting pin A is used for limiting after the rotating adjustment of the fixed column and the limiting ring.

[0013] Further, the folding part comprises:

[0014] A U-shaped hinged plate is arranged on the limiting ring;

[0015] A rotating plate is movably inserted into the U-shaped hinged plate;

[0016] A rotating shaft is used for rotatably arranging the U-shaped hinged plate and the U-shaped hinged plate.

[0017] The U-shaped hinge plate is provided with a plurality of limiting holes arranged in an arc array, the U-shaped hinge plate and the U-shaped hinge plate are limited by the limiting pin C, and the limiting is completed by the limiting pin C penetrating into different limiting holes after the U-shaped hinge plate and the U-shaped hinge plate rotate.

[0018] Further, the telescopic part comprises:

[0019] A sleeve is assembled at the end of the rotating plate;

[0020] An inner penetrating rod is movably penetrated into the sleeve, and the inner penetrating rod is provided with fixed holes arranged at equal intervals;

[0021] A limiting pin B is used to cooperate with the fixed hole to limit the sleeve and the inner penetrating rod.

[0022] In one embodiment, the weight assembly further comprises a weight, a steel rope movably penetrating through the measuring sleeve and fixed at the end of the weight;

[0023] The steel rope is provided with a sleeve ring inside the measuring sleeve, the sleeve ring is sleeved and fixed on the steel rope, the measuring sleeve is hingedly assembled on the upper support, the measuring sleeve is provided with a scale line inside, a plurality of unit scales corresponding to the scale line are provided with infrared sensing lines, the infrared sensing lines are used to sense the position of the sleeve ring, and the number of hammering and the hammering distance of the weight are automatically recorded.

[0024] Further, the weight comprises a weight main body, a plurality of receiving grooves are arranged on the weight main body at equal intervals, and a sealing cover is mounted outside the receiving groove; the receiving groove is used for placing a weight disc to adjust the weight of the weight.

[0025] Further, the weight main body is provided with a probe rod.

[0026] In one embodiment, the upper support comprises:

[0027] A support column is provided with a wire guide plate fixed at the top thereof, and the wire guide plate is used to guide the steel rope;

[0028] A U-shaped frame is fixed on the end of the support column away from the wire guide plate;

[0029] A fixed table is fixed at one end of the U-shaped frame and at the other end of the base plate.

[0030] Further, the upper support further comprises:

[0031] A pneumatic cylinder telescopic rod is assembled on the fixed table inside the U-shaped frame.

[0032] A positioning plate is assembled at the end of the cylinder telescopic rod, and a positioning hole is formed in the positioning plate.

[0033] Compared with the prior art, the power sounding detection automatic counting device can achieve the following effects:

[0034] The support base on the support frame is erected on the foundation of the construction area, and in this process, the support base is adjusted in shape by using multiple unit support legs, that is, the folding member and the telescopic member are adjusted by using the rotary member to rotate horizontally, and the telescopic member is adjusted by using the folding member to fold vertically; after the rotary member, the folding member and the telescopic member are combined and adjusted, the local multiple unit support legs are twisted and adjusted in shape, flexible adaptation to complex construction environment is achieved, which is beneficial to keeping the power sounding test in a stable state, and improves the automatic counting accuracy of the distance measurement of the weight assembly and the number of impact hammers in the power sounding test.

[0035] During the power sounding test using the weight, the weight of the weight is adjusted by adding different numbers of weight discs to the multiple receiving grooves, so as to expand the range of the power sounding test. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows: obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 The structure diagram of the power sounding detection automatic counting device of the present application is shown in the figure.

[0038] Figure 2 The structure diagram of the support frame in the present application is shown in the figure. Figure 1

[0039] The structure diagram of the upper support frame in the present application is shown in the figure. Figure 3 Figure 2 The structure diagram of the support base in the present application is shown in the figure.

[0040] Figure 4 Figure 2 The structure diagram of the unit support leg in the present application is shown in the figure.

[0041] Figure 5 The structure diagram of the weight assembly in the present application is shown in the figure. Figure 4

[0042] Figure 6 Figure 1

[0043] Figure 7 The structure diagram of the weight assembly in the present application is shown in the figure. Figure 6 ​​​​​A structural schematic diagram of the measuring sleeve;

[0044] Figure 8 For Figure 6 A structural schematic diagram of the heavy hammer.

[0045] In the drawings, the components represented by each reference numeral are listed as follows:

[0046] The winch 100;

[0047] The support frame 200; the upper support 210 (the wire plate 2101, the support column 2102, the U-shaped frame 2103, the fixing table 2104, the air cylinder telescopic rod 2105, the positioning hole 2106, the positioning plate 2107), the support base 220; the base plate 221, the unit support leg 222; the limiting pin A 2221, the U-shaped hinged plate 2222, the rotating plate 2223, the sleeve 2224, the inner inserted rod 2225, the limiting pin B 2226, the rotating shaft 2227, the limiting hole 2228, the limiting pin C 2229, the limiting ring 2230, the fixing column 2231;

[0048] The steel rope 300;

[0049] The heavy hammer assembly 400; the measuring sleeve 410, the heavy hammer 420; the heavy hammer main body 4201, the storage groove 4202, the probe rod 4203. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. The specific implementation of the utility model will be described in detail in combination with specific examples.

[0051] In the embodiment of the utility model, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 shown: a power sounding detection automatic counting device, comprising:

[0052] The heavy hammer assembly 400 is used for dynamic sounding test, and distance measurement and automatic counting are performed through the measuring sleeve 410 contained therein;

[0053] The steel rope 300 is assembled at the top of the heavy hammer assembly 400, and is used for periodically lifting the heavy hammer assembly 400 through dynamic traction;

[0054] The support frame 200 is installed on the ground surface, and is used for supporting the heavy hammer assembly 400 and the steel rope 300;

[0055] The winch 100 is installed on the support frame 200 and is drivingly connected with the steel rope 300, and is used to provide lifting power for the steel rope 300.

[0056] In summary, the support frame 200 is erected on the foundation of the construction area, the winch 100 is started, the winch 100 provides power to the steel rope 300, the steel rope 300 is used to drive the weight assembly 400 to be lifted periodically, the power sounding test is completed by the weight assembly 400, and the distance measurement and automatic counting are completed by the measuring sleeve 410.

[0057] The support frame 200 comprises an upper support 210 and a support base 220, and the upper support 210 is installed on the support base 220; the upper support 210 is used to support the steel rope 300 and the weight assembly 400, and the support base 220 is used to support the ground.

[0058] The support base 220 comprises a base plate 221 and unit support legs 222; the base plate 221 is assembled at the bottom of the upper support 210, and the unit support legs 222 are arranged in an array at the bottom of the base plate 221; the unit support leg 222 comprises a rotating piece, a folding piece and an extension piece; the rotating piece is used to adjust the folding piece and the extension piece in a horizontal direction; the folding piece is assembled on the rotating piece and is used to adjust the extension piece in a vertical direction; after the rotating piece, the folding piece and the extension piece are adjusted in combination, the unit support leg 222 is adjusted in a twisted mode, and is used to flexibly adapt to a complex construction environment.

[0059] In summary, the support base 220 of the support frame 200 is erected on the foundation of the construction area, and during the process, the support base 220 is adjusted in a mode by using the unit support legs 222, that is, the rotating piece is used to adjust the folding piece and the extension piece in a horizontal direction, and the folding piece is used to adjust the extension piece in a vertical direction; after the rotating piece, the folding piece and the extension piece are adjusted in combination, the unit support leg 222 is adjusted in a twisted mode, and is used to flexibly adapt to a complex construction environment, which is beneficial to keeping the power sounding test in a stable state and improving the automatic counting accuracy of the number of impact hammers in the distance measurement and power sounding test of the weight assembly 400.

[0060] In the embodiment of the utility model, as shown in Figure 4 And Figure 5 The rotating piece comprises:

[0061] The fixed column 2231 is assembled on the base plate 221;

[0062] The limiting ring 2230 is rotatably assembled on the fixed column 2231;

[0063] Limiting pin A2221 is used for limiting after rotating adjustment of the fixing column 2231 and the limiting ring 2230.

[0064] In summary of the above, it can be understood that the limiting pin A2221 is used for limiting after rotating adjustment of the fixing column 2231 and the limiting ring 2230, and the rotating part is used for horizontal rotation adjustment of the folding part and the telescopic part.

[0065] In the embodiment of the utility model, as shown in Figure 5 The folding part comprises:

[0066] The U-shaped hinged plate 2222 is assembled on the limiting ring 2230.

[0067] The rotating plate 2223 is movably inserted into the U-shaped hinged plate 2222.

[0068] The rotating shaft 2227 is used for rotating assembly of the U-shaped hinged plate 2222 and the U-shaped hinged plate 2222.

[0069] The U-shaped hinged plate 2222 is provided with a plurality of limiting holes 2228 arranged in an arc shape, the U-shaped hinged plate 2222 and the U-shaped hinged plate 2222 are limited by the limiting pin C2229, and after the U-shaped hinged plate 2222 and the U-shaped hinged plate 2222 rotate, the limiting pin C2229 is inserted into different limiting holes 2228 to complete the limiting.

[0070] In summary of the above, it can be understood that after the U-shaped hinged plate 2222 and the U-shaped hinged plate 2222 rotate, the limiting pin C2229 is inserted into different limiting holes 2228 to complete the limiting, and the folding part is used for folding adjustment of the telescopic part in the longitudinal direction.

[0071] In the embodiment of the utility model, as shown in Figure 5 The telescopic part comprises:

[0072] The sleeve 2224 is assembled at the end of the rotating plate 2223.

[0073] The inner insertion rod 2225 is movably inserted into the sleeve 2224, and the inner insertion rod 2225 is provided with a plurality of fixing holes arranged at equal intervals.

[0074] The limiting pin B2226 is used for limiting the sleeve 2224 and the inner insertion rod 2225.

[0075] In the embodiment of the utility model, as shown in Figure 1 , Figure 6 and Figure 7As shown: the weight assembly 400 further includes a weight 420, the steel cable 300 is movably penetrated through the measuring sleeve 410 and fixed at the end of the weight 420;

[0076] The steel cable 300 is provided with a collar inside the measuring sleeve 410, the collar is fixed on the steel cable 300, the measuring sleeve 410 is ball-hinged assembled on the upper support 210, the measuring sleeve 410 is provided with a scale line inside, a plurality of unit scales corresponding to the scale line are provided with infrared induction lines (the infrared induction line is prior art, the detailed structure can be known from prior literature periodicals, and can be directly purchased on the market, or the parts can be purchased on the market to be composed, etc.; it is not protected by the present application, and is not elaborated here, and is not drawn in the drawings), the infrared induction line is used for sensing the position of the collar, and the number of hammering and the hammering distance of the weight 420 are automatically recorded.

[0077] In the embodiment of the utility model, as shown in Figure 6 And Figure 8 As shown: the weight 420 includes a weight main body 4201, a plurality of accommodation grooves 4202 are formed on the weight main body 4201, and the plurality of accommodation grooves 4202 are distributed at equal intervals on the weight main body 4201; the accommodation groove 4202 is externally mounted with a sealing cover, the accommodation groove 4202 is used for placing a weight disc, and the weight of the weight 420 is adjusted.

[0078] Summarizing the above-mentioned conditions, it can be understood that: in the process of using the weight 420 to complete the dynamic sounding test, by increasing different numbers of weight discs for the plurality of accommodation grooves 4202, the weight of the weight 420 is adjusted to expand the range of dynamic sounding test.

[0079] The weight main body 4201 is assembled with a probe rod 4203.

[0080] In the embodiment of the utility model, as shown in Figure 2 And Figure 3 As shown: the upper support 210 includes:

[0081] The support column 2102 is fixed with the wire guide plate 2101 at the top, and the wire guide plate 2101 is used for guiding the steel cable 300;

[0082] The U-shaped frame 2103 is fixed on the end of the support column 2102 away from the wire guide plate 2101;

[0083] The fixed table 2104 is fixed on one end of the U-shaped frame 2103 and the other end of the base plate 221.

[0084] In the embodiment of the utility model, as shown in Figure 3 As shown: the upper support 210 further includes:

[0085] A cylinder telescopic rod 2105 is arranged on the fixed table 2104 inside the U-shaped frame 2103.

[0086] A positioning plate 2107 is arranged at the end of the cylinder telescopic rod 2105, and the positioning plate 2107 is provided with a positioning hole 2106.

[0087] During the power sounding test, the number of hammering is an important factor that needs to be considered; however, the existing power sounding test is prone to be in an unstable state in the face of complex construction environment, thereby affecting the counting accuracy of the number of hammering, because the base cannot be flexibly adjusted according to the specific environment; the power sounding detection automatic counting device can achieve the following effects:

[0088] The support base 220 on the support frame 200 is erected on the foundation of the construction area, and in this process, the support base 220 is adjusted in shape by using a plurality of unit support legs 222, that is, the folding piece and the telescopic piece are adjusted by using the transverse horizontal rotation of the rotating piece, and the telescopic piece is adjusted by using the longitudinal up-down folding of the folding piece; after the rotating piece, the folding piece and the telescopic piece are combined and adjusted, the local plurality of unit support legs 222 are twisted and adjusted in shape, the complex construction environment is flexibly adapted, the power sounding test is kept in a stable state, and the automatic counting accuracy of the number of hammering in the distance measurement of the weight assembly 400 and the power sounding test is improved.

[0089] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. The present application is described in detail in conjunction with the schematic diagram, and in the detailed description of the embodiments of the present application, for the convenience of description, the sectional view showing the structure of the device is partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0090] In the description of the present application, although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic counting device for dynamic penetration detection, characterized in that, include: A weight assembly (400) is used for dynamic penetrating tests, as well as for ranging and automatic counting via a measuring sleeve (410) included therein; A steel cable (300) is mounted on top of the counterweight assembly (400) for power-driven traction of the counterweight assembly (400) for periodic lifting and lowering; A support frame (200) is installed on the foundation surface to support the lifting hammer assembly (400) and the steel rope (300). A winch (100) is mounted on the support frame (200) and connected to a steel rope (300) via power transmission, for providing the power for lifting the steel rope (300); The support frame (200) includes an upper bracket (210) and a support base (220). The upper bracket (210) is mounted on the support base (220). The upper bracket (210) is used to support the steel cable (300) and the counterweight assembly (400), and the support base (220) is used to support it on the ground. The support base (220) includes a base plate (221) and unit support legs (222); the base plate (221) is mounted on the bottom of the upper bracket (210), and multiple unit support legs (222) are arranged in an array at the bottom of the base plate (221); the unit support leg (222) includes a rotating component, a folding component, and a telescopic component; the rotating component is used to adjust the folding component and the telescopic component by horizontal rotation; the folding component is mounted on the rotating component and is used to adjust the telescopic component by vertical folding; after the rotating component, the folding component, and the telescopic component are combined and adjusted, the local multiple unit support legs (222) can be twisted and adjusted to flexibly adapt to complex construction environments.

2. The automatic counting device for dynamic penetration detection according to claim 1, characterized in that, The rotating component includes: The fixed column (2231) is mounted on the base plate (221); The limiting ring (2230) is rotatably mounted on the fixed post (2231); The limiting pin A (2221) is used to limit the position after the fixed column (2231) and the limiting ring (2230) are rotated and adjusted.

3. The automatic counting device for dynamic penetration detection according to claim 2, characterized in that, The folding member includes: The U-shaped hinge plate (2222) is assembled on the limiting ring (2230); The rotating plate (2223) is movably inserted into the U-shaped hinge plate (2222); A pivot (2227) is used for the rotational assembly of the U-shaped hinge plate (2222) and the U-shaped hinge plate (2222); The U-shaped hinge plate (2222) has multiple limiting holes (2228) arranged in an arc-shaped array. The U-shaped hinge plate (2222) and the U-shaped hinge plate (2222) are limited by limiting pins C (2229). After the U-shaped hinge plate (2222) and the U-shaped hinge plate (2222) rotate, the limiting pins C (2229) are inserted into different limiting holes (2228) to complete the limiting.

4. The automatic counting device for dynamic penetration detection according to claim 3, characterized in that, The telescopic component includes: The sleeve (2224) is assembled at the end of the rotating plate (2223); An inner insert rod (2225) is movably inserted inside the sleeve (2224), and the inner insert rod (2225) has fixing holes that are evenly distributed. Limit pin B (2226) is used to cooperate with the fixing hole to complete the limit sleeve (2224) and the inner insertion rod (2225).

5. The automatic counting device for dynamic penetration testing according to claim 1, characterized in that, The weight assembly (400) also includes a weight (420), and a steel cable (300) passes through the measuring sleeve (410) and is fixed to the end of the weight (420); The steel rope (300) has a collar inside the measuring sleeve (410), which is fixed on the steel rope (300). The measuring sleeve (410) is ball-jointed on the upper bracket (210). The measuring sleeve (410) has a scale line inside, and infrared sensing lines are set between multiple unit scales corresponding to the scale line. The infrared sensing lines are used to sense the position of the collar movement and automatically record the number of hammer blows and the hammer distance of the hammer (420).

6. The automatic counting device for dynamic penetration detection according to claim 5, characterized in that, The hammer (420) includes a hammer body (4201), and multiple storage slots (4202) are provided on the hammer body (4201). The multiple storage slots (4202) are distributed at equal intervals on the hammer body (4201). A sealing cover is installed on the outside of the storage slots (4202). The storage slots (4202) are used to place the weight pan and adjust the weight of the hammer (420).

7. The automatic counting device for dynamic penetration detection according to claim 6, characterized in that, The hammer body (4201) is equipped with a probe rod (4203).

8. The automatic counting device for dynamic penetration testing according to claim 1, characterized in that, The upper support (210) includes: A support column (2102) has a guide plate (2101) fixed on its top, the guide plate (2101) being used to guide the steel rope (300). The U-shaped frame (2103) is fixed to the end of the support column (2102) away from the guide plate (2101); The fixed platform (2104) is fixed at one end to the U-shaped frame (2103) and at the other end to the base plate (221).

9. The automatic counting device for dynamic penetration detection according to claim 8, characterized in that, The upper support (210) also includes: The cylinder telescopic rod (2105) is mounted on the fixed platform (2104) inside the U-shaped frame (2103); A positioning plate (2107) is assembled at the end of the cylinder telescopic rod (2105); a positioning hole (2106) is provided on the positioning plate (2107).

Citation Information

Patent Citations

  • Automatic counting device for dynamic sounding strike number

    CN218933066U