A triaxial coupling experimental cylinder lead wire device

Abstract

This invention discloses a triaxial coupling experimental cylinder lead wire device, comprising: a pressure-applying hydraulic cylinder with a first flange and a first wire hole on the first flange; a test cylinder with a second flange at one end, the first flange and the second flange being fixedly connected, the second flange having a second wire hole corresponding to the first wire hole and threaded with a first sealing plug for threading a sensing optical cable; a piston assembly disposed inside the test cylinder, the bottom end of the piston assembly being fixedly connected to the end of a telescopic rod, the bottom end and the top end of the piston assembly having a third wire hole and a fourth wire hole respectively, the third wire hole and the fourth wire hole being threaded with a second sealing plug and a third sealing plug for threading a sensing optical cable respectively, the piston assembly having a cavity inside; and a sensing optical cable guide assembly fixed to the bottom surface of the cavity. This device enables the sensing optical cable to be located at the cylinder axis without having to be led out from the center of the cylinder tail and without bending.

Description

Technical Field

[0001] This invention relates to the technical field of triaxial coupling experimental devices in geotechnical engineering, and more specifically to a triaxial coupling experimental cylinder lead wire device. Background Technology

[0002] Triaxial coupling experiment is a common experimental method in geotechnical engineering for conducting indoor tests and conducting on-site simulations. Furthermore, triaxial coupling experiment can better simulate some engineering problems encountered in on-site engineering tests. As the requirements of triaxial coupling experiment become more and more demanding, the accuracy requirements of indoor tests also increase. However, there are many problems in the current testing process: (1) The inside of the triaxial coupling experiment cylinder is a high-pressure closed space during the experiment, making it difficult to lay out the sensor optical cable used for testing; (2) After the sensor optical cable is laid out, the cylinder is a closed space, making it difficult to lead out the signal line; (3) After laying out the wireless sensor optical cable, the cylinder uses thick steel and is a closed space, which has the problem of shielding the signal, resulting in the signal not being able to be transmitted effectively and accurately. In particular, for the cylindrical triaxial coupling experiment cylinder, the sensor optical cable needs to be laid on the cylinder axis, but there is a hydraulic cylinder at the tail of the cylinder that pressurizes the cylinder and occupies the center position of the tail. How to make the sensor optical cable located on the axis without having to lead out from the center of the tail of the cylinder and without bending has become a problem. Meanwhile, many triaxial coupling experimental cylinders now use direct drilling to lead wires and then seal them. This method has the disadvantage of only being able to use a single cable and not being able to replace the cable. Some triaxial coupling experimental cylinders have been made to allow for cable replacement, but this brings the problem of sealing.

[0003] Therefore, how to provide a triaxial coupling experimental cylinder lead wire device that is simple in structure, easy to assemble and disassemble, and highly applicable, so that the sensing optical cable can be located at the cylinder axis without having to be led out from the center of the cylinder tail and without bending, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a triaxial coupling experimental cylinder lead wire device that is simple in structure, easy to assemble and disassemble, and highly applicable, so that the sensing optical cable can be located at the cylinder axis and does not need to be led out from the center of the cylinder tail without bending, so as to complete the cable lead-out.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A triaxial coupling experimental cylinder lead wire device, comprising:

[0007] A pressure-applying hydraulic cylinder, wherein a first flange is provided on the pressure-applying hydraulic cylinder, and a first wire hole is provided on the first flange;

[0008] The test cylinder has a second flange at one end. The first flange and the second flange are fixedly connected. The second flange has a second wire hole. The second wire hole corresponds to the position of the first wire hole and has a first sealing plug for threading a sensing optical cable. The telescopic rod of the pressure-applying hydraulic cylinder passes through the first flange and the second flange.

[0009] A piston assembly is disposed inside the test cylinder. The bottom end of the piston assembly is detachably connected to the rod end of the telescopic rod. A third wire hole and a fourth wire hole are respectively opened in the middle of the bottom end and the top end of the piston assembly. A second sealing plug and a third sealing plug for passing through the sensing optical cable are respectively threaded into the third wire hole and the fourth wire hole. The piston assembly has a cavity inside.

[0010] A sensing optical cable guide assembly is fixed to the bottom surface of the cavity. The sensing optical cable passes sequentially through the first sealing plug, the second sealing plug, and the sensing optical cable guide assembly, and then exits through the third sealing plug and is arranged coaxially with the axis of the test cylinder.

[0011] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a triaxial coupling experimental cylinder lead wire device. When threading the sensing optical cable, the cable passes sequentially through a first sealing plug, a second sealing plug, and a sensing optical cable guide assembly, before vertically exiting the center of the piston assembly through a third sealing plug. This ensures that the sensing optical cable is coaxially arranged with the axis of the experimental cylinder. During the process of the hydraulic cylinder pushing the piston assembly to pressurize the medium inside the experimental cylinder, the sensing optical cable is guaranteed to be on the axis of the experimental cylinder, and the contact point with the piston assembly will not bend, thus preventing damage to the cable. Therefore, the sensing optical cable guide assembly in this lead wire device guides the cable, ensuring that it is located on the cylinder axis and does not need to be drawn from the center of the cylinder tail, thus preventing bending. Furthermore, the use of sealed plugs for wiring allows for the selection of different models of sealed plugs based on the required cable diameter. For example, four diameter types of sealed plugs are available: 5mm, 8mm, 12mm, and 18mm. Each model of sealed plug has an external thread that can be directly installed onto the flange and piston assembly using a wrench, achieving a quick assembly and disassembly effect. This also makes the entire experimental device more versatile, allowing for the use of different sensors and different cables for testing, greatly improving the flexibility and convenience of the experimental device.

[0012] Furthermore, the sensing optical cable guiding assembly includes a first guide wheel and a second guide wheel arranged adjacent to each other. The first guide wheel corresponds to the position of the second sealing plug, and the second guide wheel corresponds to the position of the third sealing plug. After passing through the second sealing plug, the sensing optical cable passes around the first guide wheel and the second guide wheel in sequence, exits through the third sealing plug, and is arranged coaxially with the axis of the test cylinder.

[0013] The beneficial effects of adopting the above technical solution are: the sensing optical cable, after being turned by the guide wheel, can be vertically guided into the test cylinder from the third sealing plug, avoiding damage caused by bending of the sensing optical cable. Furthermore, the structure is simple and easy to implement; in addition, the guide wheel and the sensing optical cable are in rolling contact, which will not cause damage to the sensing optical cable.

[0014] Furthermore, the piston assembly includes:

[0015] The base plate has its bottom end detachably connected to the end of the telescopic rod. Multiple screws are evenly distributed and fixed on the top of the base plate, and the third wire hole is provided. The first guide wheel and the second guide wheel are fixed on the top of the base plate and are located inside the multiple screws.

[0016] The piston cylinder has its lower opening in close contact with the top of the base plate. The screw, the first guide wheel, and the second guide wheel are all located inside the piston cylinder, and the internal space of the piston cylinder is the cavity.

[0017] A cover plate is detachably connected to the upper opening of the piston cylinder. The cover plate has the fourth thread hole, and multiple screws pass through the cover plate and are locked in place with nuts.

[0018] The beneficial effects of adopting the above technical solution are: it makes the piston assembly detachable, which facilitates the maintenance or replacement of a certain part, rather than replacing the entire piston assembly, thereby reducing costs.

[0019] Furthermore, a sealing gasket is pressed between the lower opening of the piston cylinder and the top end of the base plate.

[0020] The beneficial effect of adopting the above technical solution is to improve the sealing performance when the piston cylinder is connected to the base plate.

[0021] Furthermore, a sealing ring is fitted onto the outer wall of the piston cylinder.

[0022] The beneficial effects of adopting the above technical solution are: improving the sealing between the piston cylinder and the test cylinder, and preventing leakage of the medium inside the test cylinder.

[0023] Furthermore, the outer wall of the piston cylinder is provided with a first annular groove, a second annular groove, and a third annular groove from top to bottom. The sealing ring includes a first O-ring that is resistant to high pressure, high temperature, or corrosion, a second O-ring that is wear-resistant, and a third O-ring that has strong sealing performance. The first O-ring is embedded in the first annular groove, the second O-ring is embedded in the second annular groove, and the third O-ring is embedded in the third annular groove.

[0024] The beneficial effect of adopting the above technical solution is that the three-layer O-ring achieves a complete sealing effect.

[0025] Furthermore, a clamp for holding the sensing optical cable is fixed at the bottom end of the cover plate.

[0026] The beneficial effect of adopting the above technical solution is that it facilitates the fixing of the sensing optical cable.

[0027] Furthermore, a finger operation hole is provided on the cover plate near the clamp, and a flip cover is provided on the finger operation hole. When the flip cover is fastened, its upper surface is flush with the upper surface of the cover plate.

[0028] The beneficial effects of adopting the above technical solution are as follows: When fixing the sensing optical cable, the flip cover is opened, and fingers are inserted into the piston cylinder through the finger operation hole to facilitate the operation of the clamp to hold the sensing optical cable. After the sensing optical cable is clamped and fixed, the flip cover is closed, and its upper surface is flush with the upper surface of the cover plate. This ensures the flatness of the upper surface of the cover plate, and the force is uniform when pushing the medium, thus ensuring the test effect.

[0029] Furthermore, a redundant section is provided on the sensing optical cable located inside the test cylinder and below the base plate.

[0030] The beneficial effect of adopting the above technical solution is that it can make the sensing optical cable adapt to the movement of the telescopic pole, thus preventing the sensing optical cable from being pulled apart.

[0031] Furthermore, a sealing gasket is provided between the first flange and the second flange.

[0032] The beneficial effects of adopting the above technical solution are: improved sealing and tightness of flange connections. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 The attached figure is a three-dimensional structural schematic diagram of a triaxial coupling experimental cylinder lead wire device provided by the present invention.

[0035] Figure 2 The attached figure is a schematic diagram of the internal structure of a triaxial coupling experimental cylinder lead wire device provided by the present invention.

[0036] Figure 3 The attached figure is a schematic diagram of the internal structure of a triaxial coupling experimental cylinder lead wire device provided by the present invention, after removing the test cylinder barrel.

[0037] Figure 4 The attached diagram is a structural schematic of the cover plate.

[0038] Figure 5 The attached diagram is a schematic diagram of a three-jaw clamp installed on the cover plate.

[0039] Figure 6 The attached diagram is a structural schematic of a three-jaw clamp.

[0040] Figure 7 The attached diagram is a schematic diagram of the structure of the movable block clamp on the cover plate.

[0041] Figure 8 The attached diagram is a structural schematic of a movable block clamp. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figures 1-8 As shown, this embodiment of the invention discloses a triaxial coupling experimental cylinder lead wire device, comprising:

[0044] A pressure-applying hydraulic cylinder 1 is provided with a first flange 2, and a first wire hole 201 is provided on the first flange 2.

[0045] The test cylinder 3 has a second flange 4 at one end. The first flange 2 is fixedly connected to the second flange 4, and a sealing gasket (not shown) is provided between the first flange 2 and the second flange 4. The second flange 4 has a second wire hole 401, which corresponds to the position of the first wire hole 201 and is threaded with a first sealing plug 5 for threading the sensing optical cable 100. The telescopic rod 6 of the pressure-applying hydraulic cylinder 1 passes through the first flange 2 and the second flange 4.

[0046] Piston assembly 7 is installed inside test cylinder 3. The bottom end of piston assembly 7 is fixed (welded) or detachably (threaded or bolted) to the rod end of telescopic rod 6. The bottom end and the middle part of the top end of piston assembly 7 are respectively provided with a third wire hole 701 and a fourth wire hole 702. The third wire hole 701 and the fourth wire hole 702 are respectively threaded into the second sealing plug 8 and the third sealing plug 9 for passing through the sensing optical cable 100. The piston assembly 7 has a cavity inside.

[0047] The sensing optical cable guide assembly 10 is fixed on the bottom surface of the cavity. The sensing optical cable 100 passes through the first sealing plug 5, the second sealing plug 8, and the sensing optical cable guide assembly 10 in sequence, and then passes through the third sealing plug 9 and is arranged coaxially with the axis of the test cylinder 3.

[0048] When threading the sensing optical cable, it passes sequentially through the first sealed plug, the second sealed plug, and the sensing optical cable guide assembly before exiting through the third sealed plug. This ensures that the sensing optical cable is coaxial with the axis of the test cylinder. During the pressurization process where the hydraulic cylinder pushes the piston assembly to pressurize the medium inside the test cylinder, the sensing optical cable remains on the cylinder axis, preventing bending at the contact point with the piston assembly and thus avoiding damage to the cable. Therefore, the use of a sensing optical cable guide assembly in this lead-in device ensures the cable is positioned along the cylinder axis without needing to exit from the center of the cylinder tail, and also prevents bending. Furthermore, the use of sealed plugs (aviation-grade plugs that form a seal with the sensing optical cable and can withstand high pressure to prevent pressure leakage) allows for the selection of different models of sealed plugs based on the required cable diameter. For example, four diameter types of sealed plugs are available: 5mm, 8mm, 12mm, and 18mm. Each model of sealed plug has external threads that can be directly installed onto flanges and piston assemblies using a wrench, achieving quick assembly and disassembly. This also makes the entire experimental device more versatile, allowing for the use of different sensors and cables for testing, greatly improving the flexibility and convenience of the experimental device.

[0049] See details Figure 3 The sensing optical cable guiding assembly 10 includes a first guide wheel 101 and a second guide wheel 102 arranged adjacent to each other. The first guide wheel 101 corresponds to the position of the second sealing plug 8, and the second guide wheel 102 corresponds to the position of the third sealing plug 9. After passing through the second sealing plug 8, the sensing optical cable 100 passes around the first guide wheel 101 and the second guide wheel 102 in sequence, passes through the third sealing plug 9, and is arranged coaxially with the axis of the test cylinder 3.

[0050] The sensing optical cable guide assembly 10 can also be other guiding structures, such as an arc plate (not shown), the bottom end of which is connected to the second sealing plug, the high end of which is connected to the third sealing plug, and the sensing optical cable passes through the third sealing plug after passing the outer convex side of the arc plate.

[0051] Piston assembly 7 includes:

[0052] The bottom of the base plate 71 is welded to the end of the telescopic rod 6, or connected by threads or bolts. Multiple screws 72 are evenly distributed and fixed on the top of the base plate 71 and a third wire hole 701 is provided. The first guide wheel 101 and the second guide wheel 102 are fixed on the top of the base plate 71 and are located inside the multiple screws 72.

[0053] The piston cylinder 73 has its lower opening in close contact with the top of the base plate 71. The screw 72, the first guide wheel 101, and the second guide wheel 102 are all located inside the piston cylinder 73, and the internal space of the piston cylinder 73 is a cavity.

[0054] The cover plate 74 is detachably connected to the upper cylinder opening of the piston cylinder 73 (it can be connected by thread or snap). The cover plate 74 has a fourth wire hole 702. Multiple screws 72 pass through the cover plate 74 and are locked and fixed with nuts.

[0055] The base plate, telescopic rod, and piston cylinder are all detachable, making it easy to replace the base plate with a sensor optical cable guide assembly of different structural styles, rather than replacing the entire piston assembly.

[0056] A sealing gasket is pressed between the lower opening of the piston cylinder 73 and the top of the base plate 71.

[0057] A sealing ring 11 is fitted on the outer wall of the piston cylinder 73.

[0058] The outer wall of the piston cylinder 73 is provided with a first annular groove 731, a second annular groove 732, and a third annular groove 733 from top to bottom. The sealing ring 11 includes a first O-ring 111 that is resistant to high pressure, high temperature, or corrosion, a second O-ring 112 that is wear-resistant, and a third O-ring 113 that has strong sealing performance. The first O-ring 111 is embedded in the first annular groove 731, the second O-ring 112 is embedded in the second annular groove 732, and the third O-ring 113 is embedded in the third annular groove 733.

[0059] The bottom end of the cover plate 74 is fixed with a clamp 12 for holding the sensing optical cable 100.

[0060] See Figures 5-6 The clamp 12 can be a three-jaw clamp (existing product). When in use, the sensing optical cable is passed through the center of the three-jaw clamp, and then the two screws on the clamp are turned to clamp and fix the sensing optical cable.

[0061] See Figures 7-8 The clamp 12 can also be a movable block clamp (existing product). When in use, the sensing optical cable is placed in the movable block groove on the clamp, and then the nut on the clamp is turned. The nut drives the movable block to move, which can clamp and fix the sensing optical cable.

[0062] Therefore, different clamps can be used to hold the cables depending on the requirements of the test, making it very convenient to use.

[0063] A finger operation hole 741 is provided on the cover plate 74 near the clamp 12. A flip cover 13 is provided on the finger operation hole 741. After the flip cover 13 is fastened, its upper surface is flush with the upper surface of the cover plate 74.

[0064] A redundant section 1001 is provided on the sensing optical cable 100 located inside the test cylinder 3 and below the base plate 71.

[0065] The lead wire device of the present invention, through the setting of the sealed plug and the sensor optical cable guide assembly, enables the sensor optical cable to be located at the cylinder axis without having to be led out from the center of the cylinder tail and without bending. Furthermore, it has a simple structure, is easy to assemble and disassemble, and has strong applicability.

[0066] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0067] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lead wire device for a triaxial coupling experimental cylinder, characterized in that, include: A pressure-applying hydraulic cylinder (1) is provided with a first flange (2), and a first wire hole (201) is provided on the first flange (2). The test cylinder (3) has a second flange (4) at one end. The first flange (2) is fixedly connected to the second flange (4). The second flange (4) has a second wire hole (401). The second wire hole (401) corresponds to the first wire hole (201) and has a first sealing plug (5) for threading the sensing optical cable (100). The telescopic rod (6) of the pressure hydraulic cylinder (1) passes through the first flange (2) and the second flange (4). Piston assembly (7), the piston assembly (7) is disposed inside the test cylinder (3), the bottom end of the piston assembly (7) is detachably connected to the rod end of the telescopic rod (6), the bottom end and the top end of the piston assembly (7) are respectively provided with a third wire hole (701) and a fourth wire hole (702), the third wire hole (701) and the fourth wire hole (702) are respectively threaded with a second sealing plug (8) and a third sealing plug (9) for passing through the sensing optical cable (100), and the piston assembly (7) is provided with a cavity inside; The sensing optical cable guide assembly (10) is fixed on the bottom surface of the cavity. The sensing optical cable (100) passes through the first sealing plug (5), the second sealing plug (8), and the sensing optical cable guide assembly (10) in sequence, and then passes through the third sealing plug (9) and is arranged coaxially with the axis of the test cylinder (3). The sensing optical cable guide assembly (10) includes a first guide wheel (101) and a second guide wheel (102) arranged adjacent to each other. The first guide wheel (101) corresponds to the position of the second sealing plug (8), and the second guide wheel (102) corresponds to the position of the third sealing plug (9). The sensing optical cable (100) passes through the second sealing plug (8) and then passes around the first guide wheel (101) and the second guide wheel (102) in sequence, and then passes through the third sealing plug (9) and is arranged coaxially with the axis of the test cylinder (3). The piston assembly (7) includes: The bottom plate (71) is detachably connected to the end of the telescopic rod (6). Multiple screws (72) are evenly distributed and fixed on the top of the bottom plate (71) and the third wire hole (701) is provided. The first guide wheel (101) and the second guide wheel (102) are fixed on the top of the bottom plate (71) and located inside the multiple screws (72). The piston cylinder (73) has its lower opening in close contact with the top of the base plate (71). The screw (72), the first guide wheel (101), and the second guide wheel (102) are all located inside the piston cylinder (73). The internal space of the piston cylinder (73) is the cavity. The cover plate (74) is detachably connected to the upper cylinder opening of the piston cylinder (73). The cover plate (74) has the fourth wire hole (702). Multiple screws (72) pass through the cover plate (74) and are locked and fixed with nuts.

2. The triaxial coupling experimental cylinder lead wire device according to claim 1, characterized in that, A sealing gasket is pressed between the lower opening of the piston cylinder (73) and the top end of the base plate (71).

3. The triaxial coupling experimental cylinder lead wire device according to claim 1, characterized in that, A sealing ring (11) is fitted on the outer wall of the piston cylinder (73).

4. The triaxial coupling experimental cylinder lead wire device according to claim 3, characterized in that, The piston cylinder (73) has a first annular groove (731), a second annular groove (732), and a third annular groove (733) sequentially formed from top to bottom on the outer cylinder wall. The sealing ring (11) includes a first O-ring (111) that is resistant to high pressure, high temperature, or corrosion, a second O-ring (112) that is wear-resistant, and a third O-ring (113) that has strong sealing performance. The first O-ring (111) is embedded in the first annular groove (731), the second O-ring (112) is embedded in the second annular groove (732), and the third O-ring (113) is embedded in the third annular groove (733).

5. A triaxial coupling experimental cylinder lead wire device according to any one of claims 1-4, characterized in that, The bottom end of the cover plate (74) is fixed with a clamp (12) for holding the sensing optical cable (100).

6. The triaxial coupling experimental cylinder lead wire device according to claim 5, characterized in that, A finger operation hole (741) is provided on the cover plate (74) near the clamp (12). A flip cover (13) is provided on the finger operation hole (741). After the flip cover (13) is fastened, its upper surface is flush with the upper surface of the cover plate (74).

7. A triaxial coupling experimental cylinder lead wire device according to any one of claims 1-4 and 6, characterized in that, A redundant section (1001) is provided on the sensing optical cable (100) located inside the test cylinder (3) and below the base plate (71).

8. A triaxial coupling experimental cylinder lead wire device according to any one of claims 1-4 and 6, characterized in that, A sealing gasket is provided between the first flange (2) and the second flange (4).

Images