Modular segmented probe and standard penetration tester

Abstract

This utility model belongs to the field of testing instruments, specifically disclosing a modular segmented probe and a standard penetrator. The modular segmented probe includes multiple assembly units that can be detachably connected sequentially. Each assembly unit includes a connecting pipe and an air guide pipe disposed within the connecting pipe. The air guide pipe has matching first connecting components at both ends, and matching second connecting components at both ends. At least one air guide pipe contains a first pressure sensor, and at least one connecting pipe contains a second pressure sensor. This utility model solves the problems encountered when using a penetration test rod to insert into a hole in the ground at deep geological depths. These problems include the need for a long penetration test rod, which is inconvenient for transportation and carrying, and the fixed length of the rod is also inconvenient for surveys at different depths. Furthermore, directly inserting a flexible tube into a hole in the ground can easily damage the tube due to friction and collision with the hole wall.

Description

Technical Field

[0001] This utility model belongs to the field of testing instruments, specifically relating to a modular segmented probe and a standard penetration tester. Background Technology

[0002] As a key investigation method in geotechnical engineering, the results of the Standard Penetration Test (SPT) play a decisive role in core engineering judgments such as foundation stability analysis and soil liquefaction risk assessment. In existing technologies, the SPT is conducted by inserting a standard penetration instrument into the ground.

[0003] For example, patent CN201320400019.6 discloses a standard penetration tester, which includes an air compressor, a penetrometer, an air hammer, and a standard penetrometer connected in sequence. The air from the air compressor is introduced into the penetrometer through a pipeline, and then into the air hammer. The air hammer drives the standard penetrometer to hammer into the soil layer, and the number of hammer blows is recorded. Another example is a deep standard penetration test device and test method disclosed in patent CN202110801725.0. The difference between this and the above technical solutions is that no penetrometer is set. Instead, the air compressor and the air hammer are directly connected through a flexible hose (umbilical cable), and the umbilical cable extends deep into the hole on the ground.

[0004] In existing technologies, when exploring deep strata, a penetration test rod is used to insert into a hole in the ground. This requires the penetration test rod to be designed to be quite long, making it inconvenient to transport and carry. Furthermore, the fixed length of the penetration test rod is not convenient for exploration at different depths. However, if a penetration test rod is not designed and the flexible tube is directly inserted into the hole in the ground, the tube is easily damaged by friction and collision with the hole wall. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a modular segmented probe rod and a standard penetrometer to solve the problem that when exploring deep strata, inserting the probe rod into a hole on the ground requires a long design, which is inconvenient for transportation and carrying. Furthermore, the fixed length of the probe rod is not convenient for exploration at different depths. However, if the probe rod is not designed and the flexible tube is directly inserted into the hole on the ground, the flexible tube is easily damaged by friction and collision with the hole wall.

[0006] According to the embodiments of this utility model, the following technical solution is adopted:

[0007] The modular segmented probe includes multiple assembly units that can be detachably connected in sequence. Each assembly unit includes a connecting pipe and an air guide pipe disposed within the connecting pipe. The air guide pipe has a first connecting component that matches and can be connected together at both ends, and a second connecting component that matches and can be connected together at both ends. At least one air guide pipe is equipped with a first air pressure sensor, and at least one connecting pipe is equipped with a second air pressure sensor.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] In this solution, the probe is divided into multiple detachable assembly units. The number of assembly units can be adjusted to accommodate different geological depths. Furthermore, each assembly unit is relatively short, making assembly and transportation convenient.

[0010] A connecting pipe is designed outside the air duct. This serves two purposes: firstly, it protects the air duct by reducing damage caused by friction and collision between the duct and the ground's borehole walls; secondly, by monitoring and controlling the air pressure within the connecting pipe and the air duct itself, a higher air pressure in the connecting pipe reduces air pressure leakage at the joints of multiple air duct sections, thus resolving the issue of easy air pressure leakage caused by such connections. Furthermore, monitoring the air pressure within the connecting pipe and the air duct allows staff to observe air pressure data in real time, determine if there is any leakage, and intervene accordingly.

[0011] Furthermore, the air guide pipes of multiple assembly units are connected in sequence to form an air supply pipe, and the connecting pipes of multiple assembly units are connected in sequence to form a protective pipe. The two ends of the air supply pipe extend out of the two ends of the protective pipe, and both ends of the protective pipe are provided with sealing components for sealing the gap between it and the air supply pipe.

[0012] Furthermore, the sealing assembly includes a sealing cap that is detachably connected to the end of the connecting pipe, and the sealing cap has a through hole for the air guide tube to pass through.

[0013] Furthermore, the second connecting component includes an outer tongue and groove joint at one end of the connecting pipe and an inner tongue and groove joint at the other end of the connecting pipe. The inner wall of the outer tongue and groove joint is provided with an internal thread, and the outer wall of the inner tongue and groove joint is provided with an external thread that mates with the internal thread.

[0014] Furthermore, a connecting tube is fixed to one end of the connecting pipe with an external tongue and groove joint, and a connecting part that mates with the connecting tube is provided at the other end of the connecting pipe with an internal tongue and groove joint. A sealing ring is provided on the connecting part, and the connecting tube is used to lock or abut against the sealing ring to form a seal.

[0015] Furthermore, the inner wall of the connecting cylinder is provided with a straight section and a tapered section. The small diameter end of the tapered section is connected to the straight section, and the large diameter end of the tapered section is its free end. The inner wall of the straight section is provided with an annular groove, which is used to hold the sealing ring.

[0016] Furthermore, a sealing gasket is fixed to the end face of the inner tongue and groove joint. The sealing gasket includes an annular portion and a pressing portion connected to the annular portion. The pressing portion is conical and is used to abut against the conical section.

[0017] Furthermore, several connecting rods are fixed along the circumference of the inner wall of the connecting tube, and a limiting ring is fixed on the inner side of the connecting rod. The air guide tube is inserted into the limiting ring, and the inner diameter of the limiting ring is larger than the outer diameter of the air guide tube. Limiting blocks are fixed at both ends of the air guide tube, and the outer diameter of the limiting blocks is larger than the inner diameter of the limiting ring.

[0018] According to embodiments of this utility model, the following technical solutions are also adopted:

[0019] The standard penetrator includes an air compressor, a modular segmented probe, an air hammer, and a penetrator connected in sequence. The air compressor's gas enters the air hammer through the air guide tube of the modular segmented probe, and the air hammer is used to drive the penetrator to make impacts.

[0020] Furthermore, it also includes a controller, which receives the air pressure signal from the first air pressure sensor and controls the air compressor to work based on the air pressure signal. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the standard penetration instrument according to an embodiment of this utility model.

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0023] In the diagram: 1. Connecting pipe; 2. Air guide pipe; 3. First connecting assembly; 4. Connecting rod; 5. Limiting ring; 6. Limiting block; 7. Sealing cap; 8. Air hammer; 9. Penetrator; 10. Connecting cylinder; 11. Sealing gasket; 12. Sealing ring. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings, and specific embodiments will be given.

[0025] like Figure 1 As shown, the modular segmented probe includes multiple assembly units that can be detachably connected in sequence. Figure 1 The diagram shows two groups; in actual use, you can... Figure 1 The required number of assembly units are then assembled between the two groups shown to meet usage requirements.

[0026] The assembly unit includes a connecting pipe 1 and a gas guide pipe 2 disposed within the connecting pipe 1. The gas guide pipe 2 can be fixed inside the connecting pipe 1, or it can simply be placed inside the connecting pipe 1 without being connected to it. The gas guide pipe 2 can be a flexible hose or a rigid pipe, mainly used for gas transmission. The connecting pipe 1 is a rigid pipe (e.g., a metal pipe) used to protect the gas guide pipe 2. In this embodiment, a specific assembly method of the gas guide pipe 2 and the connecting pipe 1 is provided. Specifically, several connecting rods 4 are fixed circumferentially on the inner wall of the connecting pipe 1. A limiting ring 5 is fixed inside the connecting rod 4. The gas guide pipe 2 is inserted into the limiting ring 5. The inner diameter of the limiting ring 5 is larger than the outer diameter of the gas guide pipe 2, so that the limiting ring 5 does not obstruct the movement of the gas guide pipe 2. The gas guide pipe 2 and the connecting pipe 1 can move independently of each other. Limiting blocks 6 are fixed at both ends of the gas guide pipe 2. The outer diameter of the limiting blocks 6 is larger than the inner diameter of the limiting ring 5, so that the gas guide pipe 2 will not detach from the connecting pipe 1 axially, facilitating transportation and carrying.

[0027] The air delivery pipe 2 has matching first connecting components 3 at both ends, and multiple sets of assembly units of air delivery pipe 2 are sequentially connected to form an air supply pipe. The connecting pipe 1 has matching second connecting components at both ends, and multiple sets of assembly units of connecting pipe 1 are sequentially connected to form a protective pipe, which is then assembled to the required length for insertion into the ground at the required depth. The two ends of the air supply pipe extend beyond the ends of the protective pipe. The ends of the air supply pipe can be equipped with pipe fittings as used in the prior art for connection to other components of the standard penetration tester (such as an air compressor or air hammer 8). In this embodiment, both the first connecting component 3 and the second connecting component can be conventional quick-connect pipe fittings used for pipe connections in the prior art.

[0028] Both ends of the protective tube are equipped with sealing components for sealing the gap between it and the gas supply tube. Specifically, the sealing component includes a sealing cap 7. In this embodiment, the sealing cap 7 is directly threaded to the end of the connecting tube 1. The sealing cap 7 has a through hole in the middle for the gas supply tube 2 to pass through. A rubber gasket is fixed between the through hole and the gas supply tube 2 to provide a certain degree of sealing. In actual operation, sealant can also be injected into the gap between the through hole and the outer wall of the gas supply tube 2 for sealing. Sealant can also be injected between the sealing cap 7 and the connecting tube 1 for further sealing.

[0029] At least one of the gas delivery pipes 2 is equipped with a first pressure sensor. The first pressure sensor detects the gas pressure inside the gas delivery pipe after assembly, thereby determining whether there is a gas leak at the connection of the gas delivery pipe 2. At least one of the connecting pipes 1 is equipped with a second pressure sensor. The second pressure sensor detects the gas pressure inside the protective pipe after assembly, thereby determining whether there is a gas leak at the connection of the connecting pipe 1.

[0030] During actual assembly, the air guide pipes 2 are connected sequentially first, and then the connecting pipes 1 are connected sequentially. In the actual design process, in the same assembly unit, the length of the air guide pipe 2 can be greater than the length of the connecting pipe 1 (the air guide pipe 2 is a flexible hose) so as to facilitate the connection of multiple air guide pipes 2.

[0031] In another embodiment of this utility model, a design method for the second connecting component is given. In the actual design process, if the air guide tube 2 is a flexible tube, the first connecting component 3 is a conventional quick-connect pipe fitting used for pipe connection in the prior art. If the air guide tube 2 is a rigid pipe, the first connecting component 3 can also be designed with reference to the design method of the second connecting component in this embodiment.

[0032] Combination Figure 2 As shown, the second connecting component includes an outer tongue and groove joint at one end of the connecting pipe 1 and an inner tongue and groove joint at the other end of the connecting pipe 1. The inner wall of the outer tongue and groove joint is provided with an internal thread, and the outer wall of the inner tongue and groove joint is provided with an external thread that mates with the internal thread. The two adjacent connecting pipes 1 are positioned by the inner tongue and groove joint and are assembled by threaded connection. By setting the inner tongue and groove joint and the outer tongue and groove joint, there is no structure protruding from the outer wall of the connecting pipe 1 after the two connecting pipes 1 are connected, which makes it easy for the connecting pipe 1 to be inserted into the hole in the ground.

[0033] A connecting tube 10 is fixed to one end of the connecting tube 1 with an external tongue and groove joint, and a connecting part that mates with the connecting tube 10 is provided at the other end of the connecting tube 1 with an internal tongue and groove joint. A sealing ring 12 is provided on the connecting part. The sealing ring 12 is a conventional O-ring in the prior art. The connecting tube 10 is used to hold or abut against the sealing ring 12 to form a seal. Specifically, in this embodiment, the inner wall of the connecting tube 10 is provided with an annular groove, which is used to hold the sealing ring 12.

[0034] Furthermore, in the actual design process, in order to facilitate the assembly process, the end of the connecting cylinder 10 is connected to the sealing ring 12, which allows the sealing ring 12 to be inserted into the groove on the inner wall of the connecting cylinder 10. The inner wall of the connecting cylinder 10 is provided with a straight section and a tapered section. The small diameter end of the tapered section is connected to the straight section, and the large diameter end of the tapered section is its free end. The groove is set on the inner wall of the straight section. The design of the tapered section has a certain guiding effect on the sealing ring 12, which makes it easier for the sealing ring 12 to enter the connecting cylinder 10. Continue to screw the two connecting pipes 1, so that the sealing ring 12 can be inserted into the groove.

[0035] Furthermore, to further improve the sealing effect, a sealing gasket 11 is fixed to the end face of the inner tongue and groove joint. The sealing gasket 11 is made of rubber and includes an annular portion and a pressing portion connected to the annular portion. The pressing portion is conical and is used to abut against the conical section. Therefore, when the end of the connecting cylinder 10 presses against the annular portion, the conical section can also press against the pressing portion to achieve a seal. In actual design, the size of the pressing portion can also be designed, for example, making the outer diameter of the large diameter end of the pressing portion larger than the inner diameter of the large diameter end of the conical section. Then, when the conical section presses against the pressing portion, the pressing portion can be deformed to improve the sealing effect.

[0036] In this embodiment, based on the design of the second connecting component, the assembly of the sealing cap 7 and the connecting tube 1 can also refer to the design of the second connecting component, such as... Figure 1 As shown, the inner wall of the upper sealing cover 7 is provided with threads for engaging with external threads, and a connecting cylinder 10 is also fixed on the upper sealing cover 7. The outer wall of the lower sealing cover 7 is provided with threads for engaging with internal threads, and a sealing gasket 11 and a sealing ring 12 are also provided on the lower sealing cover 7.

[0037] In another embodiment of this utility model, a standard penetrator is also disclosed, comprising an air compressor (not shown in the figure), a modular segmented probe, an air hammer 8, and a penetrator 9 connected in sequence. Gas from the air compressor enters the air hammer 8 through the air guide pipe 2 of the modular segmented probe, and the air hammer 8 drives the penetrator 9 to impact. Specifically, the air compressor's outlet end is connected to an outlet pipe, which is connected to one end of the assembled air supply pipe (i.e., the upper end of the uppermost air guide pipe 2) via a pipe connector. The air hammer 8's inlet end is connected to an inlet pipe, which is connected to the other end of the assembled air supply pipe (i.e., the lower end of the lowermost air guide pipe 2) via a pipe connector. In actual assembly, the air compressor and the air guide pipe 2 can also be connected to, for example, a gas pretreatment (filtration) structure or other required structures. In this embodiment, the air compressor, air hammer 8, and penetrator 9 are all conventional components of a standard penetrator in the prior art, and no modifications are made in this embodiment. The specific assembly method can be determined according to actual needs.

[0038] In addition, gas can be introduced into the assembled connecting pipe 1 or not. In order to ensure the sealing effect of the gas guide pipe 2, in this embodiment, an air pump is designed to introduce gas into the connecting pipe 1. Specifically, an air hole can be opened on one side of the sealing cover 7 to communicate with the air pump. Inert gas or ordinary gas can be introduced into the connecting pipe 1. According to the air pressure signals of the first air pressure sensor and the second air pressure sensor, the air pressure in the connecting pipe 1 is controlled to be greater than the air pressure in the gas delivery pipe. By limiting the air pressure, gas leakage at the connection of the gas guide pipe 2 can be reduced.

[0039] In another embodiment of this utility model, a controller is also included. The controller is used to receive the air pressure signal from the first air pressure sensor and control the air compressor to work according to the air pressure signal. Specifically, the controller is a conventional single-chip microcomputer or other controller that is controlled by a program in the prior art. According to the air pressure signal from the first air pressure sensor, the controller monitors the air pressure in the air supply pipe in real time and can dynamically adjust the output of the air compressor as needed.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A modular segmented probe pole characterized by: It includes multiple sets of assembly units that can be detachably connected in sequence. Each assembly unit includes a connecting pipe and an air guide pipe disposed in the connecting pipe. The two ends of the air guide pipe are respectively provided with a first connecting component that matches each other and can be connected together, and the two ends of the connecting pipe are respectively provided with a second connecting component that matches each other and can be connected together. At least one air guide pipe is equipped with a first air pressure sensor, and at least one connecting pipe is equipped with a second air pressure sensor.

2. The modular segmented probe rod according to claim 1, characterized in that: The air guide pipes of multiple assembly units are connected in sequence to form an air supply pipe, and the connecting pipes of multiple assembly units are connected in sequence to form a protective pipe. The two ends of the air supply pipe extend out of the two ends of the protective pipe, and both ends of the protective pipe are provided with sealing components for sealing the gap between it and the air supply pipe.

3. The modular segmented probe rod according to claim 2, characterized in that: The sealing assembly includes a sealing cap that is detachably connected to the end of the connecting pipe, and the sealing cap has a through hole for the air guide pipe to pass through.

4. The modular segmented probe rod according to claim 1, characterized in that: The second connecting component includes an outer tongue and groove joint at one end of the connecting pipe and an inner tongue and groove joint at the other end of the connecting pipe. The inner wall of the outer tongue and groove joint is provided with an internal thread, and the outer wall of the inner tongue and groove joint is provided with an external thread that mates with the internal thread.

5. The modular segmented probe rod according to claim 4, characterized in that: The connecting tube has an external tongue and groove joint at one end, and a connecting part that mates with the connecting tube at the other end. A sealing ring is provided on the connecting part, and the connecting tube is used to hold or abut the sealing ring to form a seal.

6. The modular segmented probe according to claim 5, characterized in that: The inner wall of the connecting cylinder is provided with a straight section and a tapered section. The small diameter end of the tapered section is connected to the straight section, and the large diameter end of the tapered section is its free end. The inner wall of the straight section is provided with an annular groove, which is used to hold the sealing ring.

7. The modular segmented probe rod according to claim 6, characterized in that: The end face of the inner tongue and groove is also fixed with a sealing gasket. The sealing gasket includes an annular portion and a pressing portion connected to the annular portion. The pressing portion is conical and is used to abut against the conical section.

8. The modular segmented probe rod according to claim 1, characterized in that: Several connecting rods are fixed along the circumference of the inner wall of the connecting tube. A limiting ring is fixed inside the connecting rod. The air guide tube is inserted into the limiting ring. The inner diameter of the limiting ring is larger than the outer diameter of the air guide tube. Limiting blocks are fixed at both ends of the air guide tube. The outer diameter of the limiting blocks is larger than the inner diameter of the limiting ring.

9. A standard penetrator, characterized in that: It includes an air compressor, a modular segmented probe as described in any one of claims 1-8, an air hammer, and a penetrator connected in sequence. The air from the air compressor enters the air hammer through the air guide pipe of the modular segmented probe, and the air hammer is used to drive the penetrator to make impacts.

10. The standard penetrator according to claim 9, characterized in that: It also includes a controller, which receives the air pressure signal from the first air pressure sensor and controls the air compressor to work based on the air pressure signal.

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