An inflatable dual-layer fracture metal armor side pressure probe

Abstract

The utility model discloses an inflatable double -decked fissure metal cuirass side pressure probe, including side pressure ware core stem, the outer surface of side pressure ware core stem is equipped with the elastic liquid bag, the end of side pressure ware core stem is equipped with the guide cone, the outside of elastic liquid bag is equipped with metal cuirass, the metal cuirass is used for protecting the side pressure ware core stem and the spare part structure inside metal cuirass. Side pressure ware core stem is the structure of gyre, and the section of side pressure ware core stem is in the shape of ladder, and side pressure ware core stem includes side pressure ware core stem first section, side pressure ware core stem second section, side pressure ware core stem third section and side pressure ware core stem fourth section fixed together, and the guide cone is respectively equipped in side pressure ware core stem second section and side pressure ware core stem fourth section. The elastic liquid bag is equipped in side pressure ware core stem second section, and the metal cuirass is equipped on the elastic liquid bag.

Description

Technical Field

[0001] This utility model belongs to the field of in-situ testing technology for soil and rock, specifically relating to an expandable double-layer crack metal armor pressure-side probe. Background Technology

[0002] The pressuremeter test has the capability to obtain the bearing capacity and deformation modulus of soil and rock masses in situ at any depth. It allows for simultaneous drilling and testing in a single operation, and the equipment is lightweight, requires no sampling, and causes minimal disturbance, offering advantages in economy, environmental friendliness, and high efficiency. It has been widely used in loess, soft soil, and frozen soil sites. Currently, domestically produced pre-drilled pressuremeters have rated pressures of 6-10 MPa, while imported equipment can reach over 20 MPa. The pressuremeter probe is a crucial component in the entire testing process, accurately reflecting relevant test data. Existing probes are expensive, complex in structure, and costly to manufacture. Probes with internal expansion components on the market suffer from uneven stress on the core rod during expansion, damaging other components and ultimately affecting measurement results. This limits the use of other pressuremeter-related equipment in soil and rock exploration. Furthermore, the expansion components of existing probes use rubber diaphragms, which often come into contact with external rock, causing wear and reducing the overall lifespan of the equipment. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a simple, accurate, easy-to-use, expandable double-layer crack metal armor pressure-side probe.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an expandable double-layer crack metal armor pressure-side probe, including a pressure-side core rod, an elastic liquid bladder sleeved on the outer surface of the pressure-side core rod, a guide cone sleeved at the end of the pressure-side core rod, and a metal armor sleeved on the outside of the elastic liquid bladder. The metal armor is used to protect the pressure-side core rod and the internal components and structures of the metal armor.

[0005] Preferably, the pressure bypass core rod is a rotating structure with a stepped cross-section. The pressure bypass core rod includes a first section, a second section, a third section, and a fourth section fixedly connected together. Guide cones are respectively sleeved on the second section and the fourth section. The elastic fluid bladder is sleeved on the second section, and the metal armor is sleeved on the elastic fluid bladder.

[0006] Preferably, the pressure bypass core rod is provided with a pressure bypass measuring chamber, which includes a first pressure bypass measuring chamber, a second pressure bypass measuring chamber, a third pressure bypass measuring chamber, and a fourth pressure bypass measuring chamber; the second pressure bypass measuring chamber, the third pressure bypass measuring chamber, and the fourth pressure bypass measuring chamber are arranged parallel to each other, and the first pressure bypass measuring chamber is sequentially connected to the second pressure bypass measuring chamber, the third pressure bypass measuring chamber, and the fourth pressure bypass measuring chamber; the first pressure bypass measuring chamber and the second pressure bypass measuring chamber are perpendicular to each other.

[0007] Preferably, the bypass valve core rod is provided with a liquid injection port, which is connected to the bypass valve measuring chamber.

[0008] Preferably, the elastic fluid bladder has an elliptical cross-section and is wrapped around the pressure relief core rod.

[0009] Preferably, the guide cone is a conical rotating body structure, and there are two guide cones arranged symmetrically.

[0010] Preferably, the upper end of the elastic fluid bladder is provided with a fluid bladder support member, which is a rotating body structure; the fluid bladder support member has a through hole in the middle, and the end of the bypass rod passes through the through hole of the fluid bladder support member.

[0011] Preferably, the metal armor has a cylindrical structure and is connected to the guide cone.

[0012] The beneficial effects of this utility model are:

[0013] 1. The present invention provides an expandable double-layer fracture metal armor pressure-side probe with a rated pressure of 20MPa and an instantaneous overload of 25MPa, which can completely capture the critical pressure, ultimate pressure and pressure-side modulus of deep rock masses, especially soft rocks.

[0014] 2. The present invention can have a fiber Bragg grating array arranged around the outer metal armor along the length of the probe, which increases the practicality and scope of application of the present invention.

[0015] 3. The metal armor used in this utility model plays a crucial protective role. During the pressurization process, the metal armor can effectively prevent the elastic liquid bladder from expanding axially outward, and avoid the elastic liquid bladder from contacting the rock borehole wall during use and causing wear, thereby ensuring that the test can be carried out efficiently and continuously. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an expandable double-layer crack metal armor pressure-side probe according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the pressure bypass core rod of this utility model;

[0018] Figure 3 This is a schematic diagram of the elastic liquid bladder structure of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the liquid bladder support component of this utility model;

[0020] Figure 5 This is a schematic diagram of the guide cone structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the metal armor structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Pressure bypass mandrel; 2. Elastic fluid bladder; 3. Guide cone; 4. Metal armor; 5. Pressure bypass plug; 10. Injection port; 11. First section of pressure bypass mandrel; 12. Second section of pressure bypass mandrel; 13. Third section of pressure bypass mandrel; 14. Fourth section of pressure bypass mandrel; 15. Pressure bypass measuring chamber; 21. Fluid bladder support; 22. Upper part of fluid bladder support; 23. Lower part of fluid bladder support; 41. Through hole in metal armor; 42. Metal tube gap; 151. First measuring chamber of pressure bypass; 152. Second measuring chamber of pressure bypass; 153. Third measuring chamber of pressure bypass; 154. Fourth measuring chamber of pressure bypass; 211. Through hole in fluid bladder support. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1 to 6 As shown, the present invention provides an expandable double-layer crack metal armor pressure-side probe, including a pressure-side core rod 1, an elastic liquid bladder 2 sleeved on the outer surface of the pressure-side core rod 1, a guide cone 3 sleeved at the end of the pressure-side core rod 1, and a metal armor 4 sleeved on the outside of the elastic liquid bladder 2. The metal armor 4 is used to protect the pressure-side core rod 1 and the internal components of the metal armor 4.

[0025] The pressure bypass core rod 1 is a rotating structure with a stepped cross-section. The pressure bypass core rod 1 includes a first section 11, a second section 12, a third section 13, and a fourth section 14 fixedly connected together. Guide cones 3 are respectively fitted onto the second section 12 and the fourth section 14. The elastic fluid bladder 2 is fitted onto the second section 12, and the metal armor 4 is fitted onto the elastic fluid bladder 2.

[0026] The pressure bypass core rod 1 is provided with a pressure bypass measuring chamber 15, which includes a first pressure bypass measuring chamber 151, a second pressure bypass measuring chamber 152, a third pressure bypass measuring chamber 153, and a fourth pressure bypass measuring chamber 154. The second pressure bypass measuring chamber 152, the third pressure bypass measuring chamber 153, and the fourth pressure bypass measuring chamber 154 are arranged parallel to each other. The first pressure bypass measuring chamber 151 is connected to the second pressure bypass measuring chamber 152, the third pressure bypass measuring chamber 153, and the fourth pressure bypass measuring chamber 154 in sequence. The first pressure bypass measuring chamber 151 and the second pressure bypass measuring chamber 152 are perpendicular to each other.

[0027] In practical use, the number and distribution of the second measuring chamber 152, the third measuring chamber 153, and the fourth measuring chamber 154 of the pressure bypass can be set according to design requirements. In this utility model, the second measuring chamber 152, the third measuring chamber 153, and the fourth measuring chamber 154 of the pressure bypass have the same structure, with an outer diameter of 90mm and a length of 400mm. The ports of the second measuring chamber 152, the third measuring chamber 153, and the fourth measuring chamber 154 are all through-hole structures, and the second measuring chamber 152, the third measuring chamber 153, and the fourth measuring chamber 154 penetrate the pressure bypass core rod 1.

[0028] The bypass valve core rod 1 is provided with a liquid injection port 10, which is connected to the bypass valve measuring chamber 15. During operation, an external liquid source is connected to the liquid injection port 10 through a pipe, and liquid is injected into the bypass valve core rod 1 through the liquid injection port 10.

[0029] The elastic fluid bladder 2 has an elliptical cross-section and is wrapped around the bypass valve core rod 1. In this embodiment, the elastic fluid bladder 2 is made of a rubber membrane structure.

[0030] The upper end of the elastic liquid bladder 2 is provided with a liquid bladder support 21, which is a rotating structure. The liquid bladder support 21 has a liquid bladder support through hole 211 in the middle, and the end of the bypass rod 1 passes through the liquid bladder support through hole 211. In this embodiment, the second section 12 of the bypass rod passes through the liquid bladder support 21.

[0031] The liquid bladder support 21 includes an upper part 22 and a lower part 23 of the liquid bladder support that are fixed together. The upper part 22 of the liquid bladder support has a cylindrical structure, and the lower part 23 of the liquid bladder support has a hemispherical structure.

[0032] The guide cone 3 is a conical rotating body structure, and there are two guide cones 3 arranged symmetrically. The guide cone 3 is provided with a guide cone hole 31.

[0033] The interior of the guide cone 3 is concave and arc-shaped, and a guide cone through hole 32 is provided in the middle of the guide cone 3. The pressure bar core rod 1 passes through the guide cone through hole 32. The concave part of the guide cone 3 is arranged parallel to the outer surface of the lower part 23 of the liquid bladder support. The upper end of the elastic liquid bladder 2 is located between the concave part of the guide cone 3 and the lower part 23 of the liquid bladder support.

[0034] The metal armor 4 has a cylindrical structure and is connected to the guide cone 3. The metal armor 4 has a through hole 41, and the guide cone hole 31 and the through hole 41 are parallel and coaxial. A pressure-suppressor plug 5 passes through the guide cone hole 31 and the through hole 41 to connect the guide cone 3 and the metal armor 4. In this embodiment, the pressure-suppressor plug 5 is a bolt, and the guide cone hole 31 has an internally threaded hole structure, with the bolt engaging with the threaded hole.

[0035] The metal armor 4 has a double-layer structure, consisting of inner and outer metal tubing, both of which are integral structures. Metal tube gaps 42 are machined between the inner and outer metal tubing using wire cutting technology. These metal tube gaps 42 are distributed across the double-layered metal tubing of the metal armor 4 and are staggered. These gaps 42 allow the double-layered metal armor 4 to expand accordingly with the expansion of the elastic fluid bladder 2, thus adapting to different pressure conditions. Simultaneously, the gaps of the inner and outer metal tubing 42 are staggered and do not communicate with each other. This design effectively protects the flexible tubing from contact with the bore wall during use, reducing the risk of wear and damage.

[0036] During use, the guide cone 3 can automatically center within a 0.3° accuracy, ensuring that the eccentricity of the 150m depth test section is <1mm. The metal armor 4 plays a crucial protective role in the pressuremeter. During pressurization, the metal armor 4 can effectively prevent the elastic liquid bladder 2 from expanding axially outward, avoiding contact and wear between the elastic liquid bladder 2 and the rock borehole wall, thus ensuring that the test can be carried out efficiently and continuously.

[0037] In this embodiment, the upper end of the metal armor 4 is a cylindrical structure, and the lower end of the metal armor 4 has an arc cross-section. The lower end of the metal armor 4 is a closed structure, and it abuts against the fourth section 14 of the pressure-spotting core rod. Through the structure of the lower end of the metal armor 4, the lower part 23 of the liquid bladder support, and the concave structure of the guide cone 3, the elastic liquid bladder 2 can be effectively prevented from axially expanding to both ends when pressurized, ensuring that the expansion of the elastic liquid bladder 2 only occurs radially, thereby guaranteeing the accuracy of the measurement. During use, the lower end of the pressure-spotting core rod 1 can also be connected to existing sound-receiving instruments. The structure set up by this invention not only improves the measurement accuracy and reliability of the relevant pressure-spotting instrument during use, but also enables its application under a wider range of geological conditions, providing strong technical support for in-situ testing in geotechnical engineering.

[0038] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. An expandable double-layered crack metal armor pressure-side probe, characterized in that: It includes a pressure bypass core rod (1), an elastic liquid bladder (2) is fitted on the outer surface of the pressure bypass core rod (1), a guide cone (3) is fitted on the end of the pressure bypass core rod (1), and a metal armor (4) is fitted on the outside of the elastic liquid bladder (2). The metal armor (4) is used to protect the internal components of the pressure bypass core rod (1) and the metal armor (4).

2. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The bypass core rod (1) is a rotating structure with a stepped cross section. The bypass core rod (1) includes a first bypass core rod section (11), a second bypass core rod section (12), a third bypass core rod section (13), and a fourth bypass core rod section (14) that are fixed together. The guide cone (3) is respectively sleeved on the second bypass core rod section (12) and the fourth bypass core rod section (14). The elastic liquid bladder (2) is sleeved on the second bypass core rod section (12), and the metal armor (4) is sleeved on the elastic liquid bladder (2).

3. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The pressure bypass core rod (1) is provided with a pressure bypass measuring chamber (15), which includes a pressure bypass measuring first chamber (151), a pressure bypass measuring second chamber (152), a pressure bypass measuring third chamber (153) and a pressure bypass measuring fourth chamber (154). The pressure bypass measuring second chamber (152), pressure bypass measuring third chamber (153) and pressure bypass measuring fourth chamber (154) are arranged parallel to each other. The pressure bypass measuring first chamber (151) is connected to the pressure bypass measuring second chamber (152), pressure bypass measuring third chamber (153) and pressure bypass measuring fourth chamber (154) in sequence. The pressure bypass measuring first chamber (151) and pressure bypass measuring second chamber (152) are perpendicular to each other.

4. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The bypass valve core rod (1) is provided with a liquid injection port (10), which is connected to the bypass valve measuring chamber (15).

5. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The cross-section of the elastic fluid bladder (2) is elliptical, and the elastic fluid bladder (2) is wrapped around the side pressure core rod (1).

6. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The guide cone (3) is a cone-shaped rotating body structure, and there are two guide cones (3) arranged symmetrically.

7. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The upper end of the elastic liquid bladder (2) is provided with a liquid bladder support (21), which is a rotating body structure; the liquid bladder support (21) is provided with a liquid bladder support through hole (211) in the middle, and the end of the bypass core rod (1) passes through the liquid bladder support through hole (211).

8. The expandable double-layer crack metal armor pressure-side probe according to claim 1, characterized in that: The metal armor (4) has a cylindrical structure and is connected to the guide cone (3).

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