Device for providing calibration scales for rock wear resistance test steel needle

Abstract

The utility model relates to a device for providing calibration scales for a rock wear resistance test steel needle, which comprises a base, a lifting device is arranged at the upper part of the base, and the fixed end of the lifting device is connected with the base. Therefore, the measurement error of the wear length of the steel needle is reduced, and personnel can conveniently obtain a more accurate rock wear resistance index.

Description

Technical Field

[0001] The utility model relates to a device for providing a calibration scale for a steel needle, more specifically a device for providing a calibration scale for a steel needle for testing rock wear resistance. Background Art

[0002] At present, due to the advantages of CERCHAR rock wear resistance test, such as simplicity, convenience and relatively accurate results, it is widely used to measure the wear resistance index of rocks. The measured rock wear resistance index is used to predict TBM tools, thereby establishing a TBM tool consumption prediction model based on rock wear resistance index. During the CERCHAR rock wear resistance experiment, it is necessary to measure the wear degree of the steel needle after abrasion under an electron microscope. However, during the measurement process, it is necessary to first place the transparent plastic scale bar at a suitable height for scale calibration, and then measure the wear of the steel needle. Because the process of keeping the steel needle and the transparent scale bar at the same height and the horizontal distance difference is very small, it is difficult to achieve due to the high requirements of the operator, and the process is cumbersome, so the measured steel needle wear value has a large error, especially in the measurement of soft rocks such as sandstone, the steel needle wear is small, and it is more necessary to measure it accurately. Therefore, there is an urgent need for a device that can place the steel needle and the calibration scale at the same height and the horizontal distance difference between the two is small and can be freely raised and lowered, so that the worn side of the steel needle can be clearly and accurately observed, and then the rock wear resistance index can be obtained. Summary of the invention

[0003] The purpose of the utility model is to provide a device for providing a calibration scale for a steel needle for rock wear resistance testing, which can make the central axis of the steel needle and the upper surface of the U-shaped plate be in the same plane, thereby reducing the measurement error of the wear length of the steel needle, thereby facilitating personnel to obtain a more accurate rock wear resistance index.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] The invention discloses a device for providing a calibration scale for a steel needle for testing rock wear resistance, comprising a base, a lifting device installed on the upper part of the base, a fixed end of the lifting device connected to the base, a lifting end of the lifting device connected to a steel needle caliper device, the steel needle caliper device comprising a sleeve, a steel needle device installed inside the sleeve, one side of the sleeve connected to a U-shaped plate, a push plate arranged on one side of the U-shaped plate, the steel needle device comprising a positioning rod, a steel needle installed on one side of the positioning rod, the positioning rod capable of being plugged and matched with the sleeve, an annular ridge is sleeved on the middle part of the positioning rod, the annular ridge is welded to the positioning rod after being plugged, one side of the annular ridge can be matched with one side of the sleeve, the steel needle can be inserted into the inner side of the U-shaped plate, a scale is arranged on the upper part of the U-shaped plate, and a plane area is arranged on one side of the U-shaped plate.

[0006] In order to further achieve the purpose of the utility model, the following technical scheme can also be adopted: the lifting device includes a square tube and a screw rod, the lower end of the square tube is the fixed end of the lifting device, the upper end of the screw rod is the lifting end of the lifting device, the lower end of the square tube is connected to the base, the upper end of the screw rod is connected to the sleeve, the threaded connection nut on the screw rod cannot enter the interior of the square tube, the lower end of the screw rod is plugged into the square tube, the lower end of the screw rod is connected to the square block, and the side circumference of the square block is in contact with the side circumference of the inner wall of the square tube.

[0007] A positioning locking device is installed on both sides of the U-shaped plate, and the positioning locking device includes an L-shaped pressure rod and a guide tube. The outer side of the guide tube is connected to the U-shaped plate, and the L-shaped pressure rod is installed on the U-shaped plate. The L-shaped pressure rod includes a guide rod, which is plug-matched with the guide tube. One end of the guide rod is connected to a limiting rod, and the length direction of the limiting rod is perpendicular to the length direction of the guide rod. A U-shaped frame is connected on both sides of the positioning rod. The limiting rods of the two positioning locking devices can be plug-matched with the inner sides of the two U-shaped frames respectively. A tension spring is sleeved on the guide rod, one end of the tension spring is connected to the guide rod, and the other end of the tension spring is connected to the guide tube, and the tension spring is in a stretched state.

[0008] One end of the steel needle is connected to a screw rod, and one end of the positioning rod is provided with a screw hole, and the screw rod can be threadedly connected with the screw hole.

[0009] The advantage of the utility model is that after the steel needle device of the utility model is plugged into the sleeve, the central axis of the steel needle and the upper surface of the U-shaped plate can be in the same plane, thereby reducing the measurement error of the wear length of the steel needle, making it convenient for personnel to obtain a more accurate rock wear resistance index. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 for Figure 1 A-direction enlarged structural schematic diagram;

[0013] Figure 3 It is a schematic diagram of the structure of the L-shaped pressure rod of the utility model after it is unfolded;

[0014] Figure 4 It is a schematic diagram of the structure of the utility model after the screw is raised;

[0015] Figure 5 This is a schematic diagram of the structure of the positioning locking device of the utility model, and the figure shows the locking state;

[0016] Figure 6 This is a schematic diagram of the structure of the positioning locking device of the utility model, and the figure shows the unlocked state;

[0017] Figure 7 for Figure 5 Schematic diagram of the enlarged cross-sectional structure along line BB. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. Example 1

[0019] A device for providing calibration scale for the rock wear resistance test steel needle, such as Figure 1-Figure 5 As shown, it includes a base 10, a lifting device is installed on the upper part of the base 10, the fixed end of the lifting device is connected to the base 10, the lifting end of the lifting device is connected to a steel needle caliper device, the steel needle caliper device includes a sleeve 3, the steel needle device is installed inside the sleeve 3, one side of the sleeve 3 is connected to a U-shaped plate 5, and a push plate is arranged on one side of the U-shaped plate 5, the steel needle device includes a positioning rod 2, a steel needle 4 is installed on one side of the positioning rod 2, the positioning rod 2 can be plugged and matched with the sleeve 3, the middle part of the positioning rod 2 is sleeved with an annular ridge 1, the annular ridge 1 and the positioning rod 2 are plugged and welded, one side of the annular ridge 1 can be matched with one side of the sleeve 3, the steel needle 4 can be inserted into the inner side of the U-shaped plate 5, a scale 18 is arranged on the upper part of the U-shaped plate 5, and a plane area 30 is arranged on one side of the U-shaped plate 5.

[0020] After the steel needle device of the utility model is plugged into the sleeve 3, the central axis of the steel needle 4 and the upper surface of the U-shaped plate 5 can be in the same plane, thereby reducing the measurement error of the wear length of the steel needle 4, making it convenient for personnel to obtain a more accurate rock wear resistance index.

[0021] Material selection and feasibility analysis for specific implementation: The samples we actually made use the drawings in the specification as drawings, and are implemented according to the proportions and matching methods of the various components in the drawings in the specification. The connection is a common connection method such as strong adhesive connection, welding, riveting, flange connection, and one-piece molding connection. In actual production, the corresponding connection method, thickness and strength of the connection point can be creatively selected according to the actual connection strength requirements. After the steel needle device of the utility model is plugged and matched with the sleeve 3, the central axis of the steel needle 4 and the upper surface of the U-shaped plate 5 can be in the same plane, so that when personnel use an electron microscope to shoot from above, the scale 18 can more accurately reflect the degree of wear of the steel needle 4. The steel needle is the steel needle required for the CERCHAR rock wear resistance experiment, made of 40CrNiMo, Rockwell hardness: (HRC) 40-45, dimensions: length 100 mm, diameter 10 mm, cone tip angle of 90° at both ends, and cone tip length of 5 mm. The fixing ring 2 is made of stainless steel, with an inner diameter of 10 mm, an outer diameter of 15 mm, and a length of 15 mm. The knob 3 is made of a stainless steel bolt with a diameter of 4 mm and a length of 15 mm, and there is a square-shaped auxiliary sheet on the top of the knob to facilitate manual tightening of the steel needle. The scale 18 is composed of small squares with a side length of 0.1 mm, which are engraved on the scale 18. The scale 18 is made of stainless steel. Before the wear test of the steel needle 4, after the positioning rod 2 and the sleeve 3 are plugged together, the tip of the steel needle 4 can contact and cooperate with the plane area 30. After the wear test, the positioning rod 2 and the sleeve 3 can be plugged together, and one side of the annular ridge 1 can be matched with one side of the sleeve 3. At this time, the lifting device is adjusted to make the upper surface of the U-shaped plate 5 closer to the focal length position of the electron microscope. The distance between the steel needle 4 and the plane area 30 is photographed from above with an electron microscope. The photographed image will have a scale 18. The personnel can measure the wear length of the steel needle 4 by using the scale 18 as the reference length, and then obtain the rock wear resistance index. Example 2

[0022] A device for providing calibration scale for the rock wear resistance test steel needle, such as Figure 1-Figure 5As shown, it includes a base 10, a lifting device is installed on the upper part of the base 10, the fixed end of the lifting device is connected to the base 10, the lifting end of the lifting device is connected to a steel needle caliper device, the steel needle caliper device includes a sleeve 3, the steel needle device is installed inside the sleeve 3, one side of the sleeve 3 is connected to a U-shaped plate 5, and a push plate is arranged on one side of the U-shaped plate 5, the steel needle device includes a positioning rod 2, a steel needle 4 is installed on one side of the positioning rod 2, the positioning rod 2 can be plugged and matched with the sleeve 3, the middle part of the positioning rod 2 is sleeved with an annular ridge 1, the annular ridge 1 and the positioning rod 2 are plugged and welded, one side of the annular ridge 1 can be matched with one side of the sleeve 3, the steel needle 4 can be inserted into the inner side of the U-shaped plate 5, a scale 18 is arranged on the upper part of the U-shaped plate 5, and a plane area 30 is arranged on one side of the U-shaped plate 5. The lifting device includes a square tube 8 and a screw rod 6. The lower end of the square tube 8 is the fixed end of the lifting device, and the upper end of the screw rod 6 is the lifting end of the lifting device. The lower end of the square tube 8 is connected to the base 10, and the upper end of the screw rod 6 is connected to the sleeve 3. The screw rod 6 is threadedly connected to a nut 7, and the nut 7 cannot enter the interior of the square tube 8. The lower end of the screw rod 6 is plug-fitted with the square tube 8, and the lower end of the screw rod 6 is connected to a square block 9. The side circumference of the square block 9 is in contact with the side circumference of the inner wall of the square tube 8.

[0023] Personnel can manually control the relative rotation of nut 7 and screw rod 6 to adjust the relative position of nut 7 on screw rod 6, thereby adjusting the overall height of the lifting device, making it convenient for personnel to adjust the overall height of the steel needle caliper device. When an electron microscope is used to take pictures above the steel needle caliper device, personnel can adjust the overall height of the steel needle caliper device through the lifting device, so that the steel needle caliper device can be closer to the focal position of the electron microscope, making it convenient for the electron microscope to take pictures more accurately. Example 3

[0024] A device for providing calibration scale for the rock wear resistance test steel needle, such as Figure 1-Figure 5As shown, it includes a base 10, a lifting device is installed on the upper part of the base 10, the fixed end of the lifting device is connected to the base 10, the lifting end of the lifting device is connected to a steel needle caliper device, the steel needle caliper device includes a sleeve 3, the steel needle device is installed inside the sleeve 3, one side of the sleeve 3 is connected to a U-shaped plate 5, and a push plate is arranged on one side of the U-shaped plate 5, the steel needle device includes a positioning rod 2, a steel needle 4 is installed on one side of the positioning rod 2, the positioning rod 2 can be plugged and matched with the sleeve 3, the middle part of the positioning rod 2 is sleeved with an annular ridge 1, the annular ridge 1 and the positioning rod 2 are plugged and welded, one side of the annular ridge 1 can be matched with one side of the sleeve 3, the steel needle 4 can be inserted into the inner side of the U-shaped plate 5, a scale 18 is arranged on the upper part of the U-shaped plate 5, and a plane area 30 is arranged on one side of the U-shaped plate 5. A positioning locking device is installed on both sides of the U-shaped plate 5, and the positioning locking device includes an L-shaped pressure rod and a guide tube 13. The outer side of the guide tube 13 is connected to the U-shaped plate 5. The L-shaped pressure rod is installed on the U-shaped plate 5. The L-shaped pressure rod includes a guide rod 12, and the guide rod 12 is plugged into the guide tube 13. One end of the guide rod 12 is connected to a limiting rod 14, and the length direction of the limiting rod 14 is perpendicular to the length direction of the guide rod 12. A U-shaped frame 15 is connected on both sides of the positioning rod 2. The limiting rods 14 of the two positioning locking devices can be plugged into the inner sides of the two U-shaped frames 15 respectively. A tension spring 11 is sleeved on the guide rod 12, one end of the tension spring 11 is connected to the guide rod 12, and the other end of the tension spring 11 is connected to the guide tube 13, and the tension spring 11 is in a stretched state.

[0025] The positioning and locking device of the utility model can be installed after the steel needle device is installed. The personnel can pull the limit rod 14 to plug and match with the U-shaped frame 15, so that the L-shaped pressure rod and the sleeve 3 can cooperate to clamp the annular convex ridge 1 with a certain pressure, thereby limiting the positioning rod 2, thereby limiting the steel needle device to a standard position. When the steel needle device needs to be removed, the personnel can pull the limit rod 14 to disengage the limit rod 14 from the U-shaped frame 15, and then rotate the limit rod 14 to an angle that does not block the U-shaped frame 15 and the annular convex ridge 1, and then the personnel can pull the steel needle device off the sleeve 3. Example 4

[0026] A device for providing calibration scale for the rock wear resistance test steel needle, such as Figure 1-Figure 5As shown, it includes a base 10, a lifting device is installed on the upper part of the base 10, the fixed end of the lifting device is connected to the base 10, the lifting end of the lifting device is connected to the steel needle caliper device, the steel needle caliper device includes a sleeve 3, the steel needle device is installed inside the sleeve 3, one side of the sleeve 3 is connected to the U-shaped plate 5, and a push plate is arranged on one side of the U-shaped plate 5, the steel needle device includes a positioning rod 2, a steel needle 4 is installed on one side of the positioning rod 2, the positioning rod 2 can be plugged and matched with the sleeve 3, the middle part of the positioning rod 2 is sleeved with an annular ridge 1, the annular ridge 1 and the positioning rod 2 are plugged and welded, one side of the annular ridge 1 can be matched with one side of the sleeve 3, the steel needle 4 can be inserted into the inner side of the U-shaped plate 5, the upper part of the U-shaped plate 5 is provided with a scale 18, and one side of the U-shaped plate 5 is provided with a plane area 30. One end of the steel needle 4 is connected to a screw rod 16, and one end of the positioning rod 2 is provided with a screw hole 17, and the screw rod 16 can be threadedly connected with the screw hole 17.

[0027] The threaded connection between the screw rod 16 and the screw hole 17 of the utility model can facilitate the detachable connection between the steel needle 4 and the positioning rod 2, and is convenient for replacing different steel needles 4.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention.

Claims

1. A device for providing a calibration scale for a steel needle for rock wear resistance testing, characterized in that: The invention comprises a base (10), a lifting device is installed on the upper part of the base (10), a fixed end of the lifting device is connected to the base (10), and a lifting end of the lifting device is connected to a steel needle caliper device, the steel needle caliper device comprises a sleeve (3), a steel needle device is installed inside the sleeve (3), one side of the sleeve (3) is connected to a U-shaped plate (5), and a push plate is arranged on one side of the U-shaped plate (5), the steel needle device comprises a positioning rod (2), a steel needle (4) is installed on one side of the positioning rod (2), the positioning rod (2) can be plugged and matched with the sleeve (3), the middle part of the positioning rod (2) is sleeved with an annular convex ridge (1), the annular convex ridge (1) and the positioning rod (2) are plugged and welded, one side of the annular convex ridge (1) can be matched with one side of the sleeve (3), the steel needle (4) can be inserted into the inner side of the U-shaped plate (5), a scale (18) is arranged on the upper part of the U-shaped plate (5), and a plane area (30) is arranged on one side of the U-shaped plate (5).

2. The device for providing calibration scale for a steel needle for rock wear resistance testing according to claim 1, characterized in that: The lifting device comprises a square tube (8) and a screw rod (6), the lower end of the square tube (8) being the fixed end of the lifting device, the upper end of the screw rod (6) being the lifting end of the lifting device, the lower end of the square tube (8) being connected to the base (10), the upper end of the screw rod (6) being connected to the sleeve (3), the upper thread of the screw rod (6) being connected to the nut (7), the nut (7) being unable to enter the interior of the square tube (8), the lower end of the screw rod (6) being plug-fitted with the square tube (8), the lower end of the screw rod (6) being connected to the square block (9), the side circumference of the square block (9) being in contact with the side circumference of the inner wall of the square tube (8).

3. The device for providing calibration scale for a steel needle for rock wear resistance testing according to claim 1, characterized in that: A positioning locking device is installed on both sides of the U-shaped plate (5), and the positioning locking device comprises an L-shaped pressure rod and a guide tube (13). The outer side of the guide tube (13) is connected to the U-shaped plate (5). The L-shaped pressure rod is installed on the U-shaped plate (5). The L-shaped pressure rod comprises a guide rod (12). The guide rod (12) and the guide tube (13) are plugged together. One end of the guide rod (12) is connected to a limit rod (14). The length direction of the limit rod (14) is perpendicular to the length direction of the guide rod (12). Both sides of the positioning rod (2) are connected to a U-shaped frame (15). The limit rods (14) of the two positioning locking devices can be plugged together with the inner sides of the two U-shaped frames (15) respectively. A tension spring (11) is sleeved on the guide rod (12). One end of the tension spring (11) is connected to the guide rod (12), and the other end of the tension spring (11) is connected to the guide tube (13). The tension spring (11) is in a stretched state.

4. The device for providing calibration scale for a steel needle for rock wear resistance testing according to claim 1, characterized in that: One end of the steel needle (4) is connected to a screw rod (16), one end of the positioning rod (2) is provided with a screw hole (17), and the screw rod (16) can be threadedly connected to the screw hole (17).

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