Hydraulic hard rock cylinder standard specimen coring device

Abstract

The present invention discloses a hydraulically processed hard rock cylindrical standard specimen coring device, which relates to the field of hard rock coring test equipment, including a workbench, a clamping system and two water jet coring systems arranged on the workbench; the clamping system forms a clamping space for fixing a hard rock target, and the two water jet coring systems are arranged on the left and right sides of the clamping space in a mirror-symmetrical manner; the two water jet coring systems each include a water jet water supply assembly, a circular cutting path plate, a mounting bracket, a mechanical rocker arm, a nozzle and an electric control track; the water jet water supply assembly is connected to the nozzle; and the electric control track is connected to the workbench. The present invention can keep the nozzle within the effective cutting target distance, thereby ensuring that a hard rock specimen of sufficient depth can be cut; and can maintain the force balance of the hard rock target during the cutting process, and can also ensure the verticality and cylindricity of the obtained hard rock specimen.

Description

Technical Field

[0001] The invention relates to hard rock coring test equipment, in particular to a hydraulic hard rock cylindrical standard test piece coring device. Background Art

[0002] With the increase of mining depth and the gradual development of geothermal resources, deep rock is mostly hard rock. The mechanical properties of deep hard rock are in the hot spot of scientific research. How to test the mechanical properties of deep rock such as granite, limestone and other hard rocks is crucial. In the research process, it is necessary to carry out mechanical tests such as uniaxial compression and triaxial compression on hard rock, which requires a large number of cylindrical hard rock standard specimens. Conventional mechanical coring devices are difficult to coring hard rock targets such as granite, and the wear and heating of the drill bit are serious, resulting in deformation and failure of the drill bit. Ultra-high pressure abrasive water jet technology can effectively cut hard rock targets and coring irregular granite, etc. However, the use of unidirectional abrasive water jet to cut hard rock targets cannot drill through large and thick hard rock bodies, resulting in the inability to remove hard rock specimens. In addition, during ultra-high pressure operation, the hard rock specimens and the jet are easily deflected, and the verticality of the hard rock specimens cannot be guaranteed, and the hard rock cylindrical standard specimens cannot be obtained. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a hydraulic hard rock cylindrical standard specimen coring device, which can keep the nozzle within the effective cutting target distance, thereby ensuring that a hard rock specimen of sufficient depth can be cut; and can maintain the force balance of the hard rock target during the cutting process, and can also ensure the verticality and cylindricity of the obtained hard rock specimen.

[0004] A hydraulically processed hard rock cylindrical standard specimen coring device in the present invention comprises a workbench, a clamping system and two water jet coring systems arranged on the workbench; the clamping system forms a clamping space for fixing a hard rock target, and the two water jet coring systems are arranged on the left and right sides of the clamping space in a mirror-symmetrical manner; the two water jet coring systems each comprise a water jet water supply assembly, a ring cutting path plate, a mounting bracket, a mechanical rocker arm, a nozzle and an electric control track; the water jet water supply assembly is connected to the nozzle; the electric control track is connected to the workbench, the mounting bracket is connected to the electric control track, and the electric control track can drive the mounting bracket to move in the left and right directions; the tail end of the mechanical rocker arm and the ring cutting path plate are both connected to the mounting bracket, a guide path is arranged on the ring cutting path plate, the head end of the mechanical rocker arm is connected to the nozzle, and the head end of the mechanical rocker arm can drive the nozzle to move along the guide path; the water outlets of the two nozzles are arranged facing each other.

[0005] Furthermore, both of the water jet coring systems also include a laser rangefinder disposed on the mounting bracket.

[0006] Furthermore, a large inner gear ring and a small inner gear ring are arranged on the annular cutting path plate; a gear bearing is arranged at the head end of the mechanical rocker arm, and the gear bearing can mesh with the large inner gear ring or the small inner gear ring.

[0007] Furthermore, the water jet water supply assembly includes a water tank, an ultra-high pressure water pump, an overflow valve, an abrasive tank, a throttle valve and a pressure gauge; the water tank, ultra-high pressure water pump, throttle valve, abrasive tank and nozzle are connected in sequence, the pressure gauge is connected to the pipeline between the throttle valve and the abrasive tank, the water inlet end of the overflow valve is connected to the pipeline between the ultra-high pressure water pump and the throttle valve, and the water outlet end of the overflow valve is connected to the water tank.

[0008] Furthermore, the clamping system includes a longitudinal clamping assembly and two longitudinal movable plates for clamping the upper and lower sides of the hard rock target respectively. The longitudinal clamping assembly includes two longitudinal clamping members that are mirror-symmetrically arranged on the upper and lower sides of the clamping space. The two longitudinal clamping members each include a longitudinal rotating handle, a longitudinal screw and a longitudinal loading head. The head end of the longitudinal screw is fixedly connected to the longitudinal rotating handle, the middle part of the longitudinal screw is threadedly connected to the workbench, the tail end of the longitudinal screw is rotatably connected to the longitudinal loading head, and the longitudinal loading head is fixedly connected to the longitudinal movable plate.

[0009] Furthermore, the clamping system also includes a movable track, and the longitudinal movable plate is slidably connected to the movable track.

[0010] Furthermore, the clamping system also includes two transverse clamping assemblies spaced apart in the up and down directions and two transverse movable plates for clamping the left and right sides of the hard rock target respectively. The two transverse clamping assemblies are respectively arranged on the upper and lower sides of the annular cutting path plate, and the two transverse movable plates are both provided with large coring holes and small coring holes.

[0011] Furthermore, the two transverse clamping assemblies each include two transverse clamping members that are mirror-symmetrically arranged on the left and right sides of the clamping space, and the transverse clamping members each include a transverse rotating handle, a transverse screw and a transverse loading head, the head end of the transverse screw is fixedly connected to the transverse rotating handle, the middle part of the transverse screw is threadedly connected to the workbench, the tail end of the transverse screw is rotatably connected to the transverse loading head, and the transverse loading head is fixedly connected to the transverse movable plate.

[0012] Furthermore, a flexible support member is provided on a surface of the longitudinal movable plate and a surface of the transverse movable plate facing the clamping space.

[0013] Furthermore, it also includes a water collecting component arranged at the lower part of the workbench.

[0014] The beneficial effects of the present invention are:

[0015] (1) The present invention can provide an ultra-high pressure abrasive water jet to the nozzle through a water jet water supply assembly. The two electrically controlled rails can drive the mounting bracket to move toward each other, thereby driving the nozzle to move toward each other, thereby realizing bidirectional cutting of the hard rock target fixed in the clamping space. The nozzle can be kept within the effective cutting target distance to ensure that a hard rock specimen with a sufficient depth can be cut, thereby preventing the inability to obtain a hard rock specimen of a standard length due to the limited cutting depth of the ultra-high pressure abrasive water jet. At the same time, under the guidance of the circular cutting path plate, the movement trajectories of the two nozzles are symmetrical to each other. When the two mirror-symmetrical nozzles are cutting, the bidirectional cutting can maintain the force balance of the hard rock target during the cutting process, and can ensure the verticality and cylindricity of the obtained hard rock specimen;

[0016] (2) The present invention has a high degree of automation, which ensures the verticality and cutting rate of hard rock specimens, and has a simple structure, convenient operation, and is economical and practical;

[0017] (3) When the mechanical rocker arm of the present invention drives the nozzle to perform ring cutting, the gear bearing meshes with the large inner gear ring or the small inner gear ring, which can ensure that the movement trajectory of the nozzle is a perfect circle of a predetermined diameter, and can further ensure the verticality and cylindricity of the obtained hard rock specimen;

[0018] (4) The clamping effect of the present invention is good, which can prevent the hard rock target from moving eccentrically during the cutting process and ensure the stability of the hard rock target during the coring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 A schematic diagram of the matching structure of the circular cutting path plate (12) and the mechanical rocker arm of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the transverse moving plate (11) of the present invention.

[0023] The markings in the accompanying drawings are as follows: 1-workbench, 2-lateral clamping member, 3-longitudinal clamping member, 4-longitudinal moving plate, 5-moving track, 6-longitudinal rotating handle, 7-longitudinal screw, 8-longitudinal loading head, 9-hard rock target, 10-flexible support, 11-lateral moving plate, 12-circular cutting path plate, 13-small inner ring gear, 14-large inner ring gear, 15-mechanical rocker arm, 16-nozzle, 17-mounting bracket, 18-laser rangefinder, 19-electrically controlled track, 20-gear bearing, 21-control cabinet, 22-water tank, 23-ultra-high pressure water pump, 24-abrasive tank, 25-throttle valve, 26-overflow valve, 27-pressure gauge, 28-water collection assembly, 29-large coring hole, 30-small coring hole. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1-Figure 3 As shown, a hydraulically processed hard rock cylindrical standard specimen coring device in this embodiment comprises a workbench 1, a clamping system and two water jet coring systems arranged on the workbench 1; the clamping system forms a clamping space for fixing a hard rock target 9, and the two water jet coring systems are arranged on the left and right sides of the clamping space in a mirror-symmetrical manner; the two water jet coring systems each comprise a water jet water supply assembly, a circular cutting path plate 12, a mounting bracket 17, a mechanical rocker arm 15, a nozzle 16 and an electric control track 19; the water jet water supply assembly is connected to the nozzle 16 The electric control track 19 is connected to the workbench 1, the mounting bracket 17 is connected to the electric control track 19, and the electric control track 19 can drive the mounting bracket 17 to move along the left and right directions; the tail end of the mechanical rocker arm 15 and the circular cutting path plate 12 are connected to the mounting bracket 17, the circular cutting path plate 12 is provided with a guide path, the head end of the mechanical rocker arm 15 is connected to the nozzle 16, and the head end of the mechanical rocker arm 15 can drive the nozzle 16 to move along the guide path; the water outlets of the two nozzles 16 are arranged facing each other. The water jet water supply assembly can provide an ultra-high pressure abrasive water jet for the nozzle 16, and the two electrically controlled rails 19 can drive the mounting bracket 17 to move toward each other, thereby driving the nozzle 16 to move toward each other, thereby realizing bidirectional cutting of the hard rock target 9 fixed in the clamping space, and can keep the nozzle 16 within the effective cutting target distance to ensure that a hard rock specimen of sufficient depth can be cut, and prevent the inability to obtain a hard rock specimen of standard length due to the limited cutting depth of the ultra-high pressure abrasive water jet. At the same time, under the guiding action of the annular cutting path plate 12, the movement trajectories of the two nozzles 16 are symmetrical to each other. When the two mirror-symmetrical nozzles 16 are cutting, the bidirectional cutting can maintain the force balance of the hard rock target 9 during the cutting process, and can ensure the verticality and cylindricity of the obtained hard rock specimen.

[0026] In this embodiment, both of the water jet coring systems further include a laser rangefinder 18 disposed on the mounting bracket 17. The hydraulic hard rock cylindrical standard specimen coring device further includes a control cabinet 21, which is connected to the nozzle 16, the mechanical rocker arm 15, the electric control track 19 and the laser rangefinder 18. The laser rangefinder 18 can obtain the cutting depth during cutting and provide timely feedback to the control cabinet 21, so that the control cabinet 21 can send signals to the nozzle 16, the mechanical rocker arm 15 and the electric control track 19 to control the working status of these components. The control cabinet 21, the mechanical rocker arm 15 and the laser rangefinder 18 are used to realize the automatic control of the cutting process, thereby ensuring the verticality and cutting rate of the hard rock specimen cutting, and the structure is simple, the operation is convenient, and the economy and practicality are achieved.

[0027] In this embodiment, a large inner gear ring 14 and a small inner gear ring 13 are provided on the annular cutting path plate 12; a gear bearing 20 is provided at the head end of the mechanical rocker arm 15, and the gear bearing 20 can mesh with the large inner gear ring 14 or the small inner gear ring 13. The gear bearing 20 is located at the rear side of the nozzle 16. When the mechanical rocker arm 15 drives the nozzle 16 to perform annular cutting, the gear bearing 20 meshes with the large inner gear ring 14 or the small inner gear ring 13, which can ensure that the motion trajectory of the nozzle 16 is a perfect circle of a predetermined diameter, and can further ensure the verticality and cylindricity of the obtained hard rock specimen; when the gear bearing 20 meshes with the large inner gear ring 14, the perfect circle diameter of the motion trajectory of the nozzle 16 is φ50, and when the gear bearing 20 meshes with the small inner gear ring 13, the perfect circle diameter of the motion trajectory of the nozzle 16 is φ25.

[0028] In this embodiment, the water jet water supply assembly includes a water tank 22, an ultra-high pressure water pump 23, an overflow valve 26, an abrasive tank 24, a throttle valve 25 and a pressure gauge 27; the water tank 22, the ultra-high pressure water pump 23, the throttle valve 25, the abrasive tank 24 and the nozzle 16 are connected in sequence, the pressure gauge 27 is connected to the pipeline between the throttle valve 25 and the abrasive tank 24, the water inlet end of the overflow valve 26 is connected to the pipeline between the ultra-high pressure water pump 23 and the throttle valve 25, and the water outlet end of the overflow valve 26 is connected to the water tank 22. The ultra-high pressure water pump 23 can pump the water in the water tank 22 to the throttle valve 25, and then the water flows to the abrasive tank 24 after passing through the throttle valve 25, and finally forms an ultra-high pressure abrasive water jet to flow to the nozzle 16 and spray out.

[0029] In this embodiment, the clamping system includes a longitudinal clamping assembly and two longitudinal movable plates 4 for clamping the upper and lower sides of the hard rock target 9 respectively. The longitudinal clamping assembly includes two longitudinal clamping members 3 arranged at the upper and lower sides of the clamping space in a mirror-symmetrical manner. Both longitudinal clamping members 3 include a longitudinal rotating handle 6, a longitudinal screw 7 and a longitudinal loading head 8. The head end of the longitudinal screw 7 is fixedly connected to the longitudinal rotating handle 6, the middle part of the longitudinal screw 7 is threadedly connected to the workbench 1, the tail end of the longitudinal screw 7 is rotatably connected to the longitudinal loading head 8, and the longitudinal loading head 8 is fixedly connected to the longitudinal movable plate 4. When fixing the hard rock target 9, the two screws can be moved toward each other by rotating the two longitudinal rotating handles 6, and the tail end of the longitudinal screw 7 and the longitudinal loading head 8 can rotate relative to each other. Therefore, when the two screws move toward each other, they can drive the two longitudinal loading heads 8 to move toward each other, and then the two longitudinal movable plates 4 move toward each other, and finally the upper and lower sides of the hard rock target 9 are clamped and fixed.

[0030] In this embodiment, the clamping system further includes a moving track 5, and the longitudinal moving plate 4 is slidably connected to the moving track 5. The moving track 5 can guide the longitudinal moving plate 4 to ensure that its moving path is along the up and down direction.

[0031] In this embodiment, the clamping system further includes two transverse clamping assemblies spaced apart in the up-down direction and two transverse moving plates 11 for clamping the left and right sides of the hard rock target 9 respectively. The two transverse clamping assemblies are respectively arranged on the upper and lower sides of the annular cutting path plate 12. The two transverse moving plates 11 are both provided with a large coring hole 29 and a small coring hole 30. The position of the large coring hole 29 corresponds to the position of the large inner gear ring 14, and the position of the small coring hole 30 corresponds to the position of the small inner gear ring 13. The diameter of the large coring hole 29 is greater than φ50, which can be φ55mm, and the diameter of the small coring hole 30 is greater than φ25, which can be φ27.5mm, which can prevent the transverse moving plate 11 from interfering with the feeding of the nozzle 16.

[0032] In this embodiment, the two transverse clamping assemblies each include two transverse clamping members 2 that are mirror-symmetrically arranged on the left and right sides of the clamping space, and the transverse clamping members 2 each include a transverse rotating handle, a transverse screw, and a transverse loading head. The head end of the transverse screw is fixedly connected to the transverse rotating handle, the middle part of the transverse screw is threadedly connected to the workbench 1, the tail end of the transverse screw is rotationally connected to the transverse loading head, and the transverse loading head is fixedly connected to the transverse moving plate 11. The principle of the transverse clamping member 2 is similar to that of the longitudinal clamping member 3. The two transverse clamping members 2 can clamp and fix the left and right sides of the hard rock target 9. In addition, the annular cutting path plate 12 is located between the two transverse clamping assemblies, which can prevent the hard rock target 9 from moving eccentrically during the cutting process and ensure the stability of the hard rock target 9 during the coring process.

[0033] In this embodiment, the longitudinal moving plate 4 and the transverse moving plate 11 are both provided with flexible support members 10 on one side facing the clamping space, and corresponding clearance holes are also provided on the flexible support member 10 of the transverse moving plate 11 at positions corresponding to the large coring hole 29 and the small coring hole 30. The flexible support member 10 can increase friction and conform to the outer surface of the hard rock target 9, thereby improving the clamping effect, preventing the hard rock target 9 from moving eccentrically during the cutting process, and ensuring the stability of the hard rock target 9 during the coring process.

[0034] In this embodiment, a water collecting assembly 28 is further included, which is arranged at the lower part of the workbench 1 and can recover the abrasive water jet.

[0035] When in use, the following steps are included:

[0036] S1. Place the hard rock target 9 on the workbench 1. The clamping system clamps the four upper, lower, left and right surfaces of the hard rock target 9 to fix the hard rock target 9.

[0037] S2, open the mechanical rocker arm 15, and adjust the gear bearings 20 behind the two nozzles 16 to fit into the corresponding inner gear rings of the annular cutting path plate 12 according to the specifications of the required cylindrical standard specimen; if the required cylindrical standard specimen is φ50*100mm, mesh the gear bearings 20 with the large inner gear ring 14; if the required cylindrical standard specimen is φ25*100mm, mesh the gear bearings 20 with the small inner gear ring 13; at this time, the nozzle 16 is facing the large coring hole 29 or the small coring hole 30, and the annular cutting speed is set to 2r / min through the control cabinet 21;

[0038] S3, turn on the ultra-high pressure water pump 23 and the abrasive tank 24, the ultra-high pressure abrasive water jet is ejected from the nozzle 16, and the left and right mechanical rocker arms 15 respectively drive the nozzle 16 to perform synchronous circular cutting along the circular cutting path plate 12 at a uniform speed;

[0039] S4, every time a cutting rotation is made, the laser rangefinder 18 measures the cutting depth of the hard rock target 9 once, and then the electric control track 19 drives the mounting bracket 17, the mechanical rocker arm 15 and the circular cutting path plate 12 to synchronously feed horizontally once the cutting depth;

[0040] S5. When the laser rangefinder 18 feeds back that the bidirectional cutting depth is equal to the thickness of the hard rock target 9, the control cabinet 21 automatically stops the circular cutting and the lateral feeding; the ultrahigh pressure water pump 23 is turned off to obtain the required cylindrical specimen.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A hydraulically processed hard rock cylindrical standard specimen coring device, characterized in that: The invention comprises a workbench (1), and also comprises a clamping system and two water jet coring systems arranged on the workbench (1); the clamping system forms a clamping space for fixing a hard rock target (9), and the two water jet coring systems are arranged on the left and right sides of the clamping space in a mirror-symmetrical manner; the two water jet coring systems each comprise a water jet water supply assembly, a circular cutting path plate (12), a mounting bracket (17), a mechanical rocker arm (15), a nozzle (16), and an electric control track (19); the water jet water supply assembly is connected to the nozzle (16); the electric control track (19) is connected to the workbench (1 ), the mounting bracket (17) is connected to the electric control track (19), and the electric control track (19) can drive the mounting bracket (17) to move in the left-right direction; the tail end of the mechanical rocker arm (15) and the circular cutting path plate (12) are both connected to the mounting bracket (17), the circular cutting path plate (12) is provided with a guide path, the head end of the mechanical rocker arm (15) is connected to the nozzle (16), and the head end of the mechanical rocker arm (15) can drive the nozzle (16) to move along the guide path; the water outlets of the two nozzles (16) are arranged facing each other; A large inner gear ring (14) and a small inner gear ring (13) are provided on the annular cutting path plate (12); a gear bearing (20) is provided at the head end of the mechanical rocker arm (15), and the gear bearing (20) can mesh with the large inner gear ring (14) or the small inner gear ring (13).

2. The hydraulic hard rock cylindrical standard specimen coring device according to claim 1 is characterized in that: Both of the water jet coring systems also include a laser rangefinder (18) arranged on the mounting bracket (17).

3. The hydraulic hard rock cylindrical standard specimen coring device according to claim 1, characterized in that: The water jet water supply assembly comprises a water tank (22), an ultra-high pressure water pump (23), an overflow valve (26), an abrasive tank (24), a throttle valve (25) and a pressure gauge (27); the water tank (22), the ultra-high pressure water pump (23), the throttle valve (25), the abrasive tank (24) and the nozzle (16) are connected in sequence; the pressure gauge (27) is connected to the pipeline between the throttle valve (25) and the abrasive tank (24); the water inlet end of the overflow valve (26) is connected to the pipeline between the ultra-high pressure water pump (23) and the throttle valve (25); and the water outlet end of the overflow valve (26) is connected to the water tank (22).

4. The hydraulic hard rock cylindrical standard specimen coring device according to claim 1, characterized in that: The clamping system comprises a longitudinal clamping assembly and two longitudinal movable plates (4) for clamping the upper and lower sides of a hard rock target (9) respectively. The longitudinal clamping assembly comprises two longitudinal clamping members (3) arranged mirror-symmetrically on the upper and lower sides of the clamping space. The two longitudinal clamping members (3) each comprise a longitudinal rotating handle (6), a longitudinal screw (7) and a longitudinal loading head (8). The head end of the longitudinal screw (7) is fixedly connected to the longitudinal rotating handle (6), the middle part of the longitudinal screw (7) is threadedly connected to the workbench (1), the tail end of the longitudinal screw (7) is rotationally connected to the longitudinal loading head (8), and the longitudinal loading head (8) is fixedly connected to the longitudinal movable plate (4).

5. The hydraulic hard rock cylindrical standard specimen coring device according to claim 4 is characterized in that: The clamping system further comprises a movable track (5), and the longitudinal movable plate (4) is slidably connected to the movable track (5).

6. The hydraulic hard rock cylindrical standard specimen coring device according to claim 4, characterized in that: The clamping system further comprises two transverse clamping assemblies spaced apart in the up-down direction and two transverse movable plates (11) for respectively clamping the left and right sides of the hard rock target (9), the two transverse clamping assemblies being respectively arranged on the upper and lower sides of the annular cutting path plate (12), and the two transverse movable plates (11) being both provided with a large coring hole (29) and a small coring hole (30).

7. The hydraulic hard rock cylindrical standard specimen coring device according to claim 6, characterized in that: The two transverse clamping assemblies each comprise two transverse clamping members (2) which are arranged in a mirror-symmetrical manner on the left and right sides of the clamping space, and the transverse clamping members (2) each comprise a transverse rotating handle, a transverse screw and a transverse loading head, the head end of the transverse screw being fixedly connected to the transverse rotating handle, the middle part of the transverse screw being threadedly connected to the workbench (1), the tail end of the transverse screw being rotatably connected to the transverse loading head, and the transverse loading head being fixedly connected to the transverse movable plate (11).

8. The hydraulic hard rock cylindrical standard specimen coring device according to claim 7, characterized in that: A flexible support member (10) is provided on a surface of the longitudinal movable plate (4) and the transverse movable plate (11) facing the clamping space.

9. The hydraulic hard rock cylindrical standard specimen coring device according to claim 1, characterized in that: It also includes a water collecting assembly (28) arranged at the lower part of the workbench (1).

Images