A test tool for a rock drilling device of a blast furnace tapping machine

Abstract

The utility model provides a kind of test tool for rock drilling rig of blast furnace opening machine, it is related to blast furnace opening machine field, the scheme used is: including chassis, chassis is divided into installation area and test area, installation area is used to install rock drilling rig, test area is provided with mounting seat, horizontal setting is provided with coil spring on mounting seat, the free end of coil spring is towards installation area, coil spring inside coaxially is provided with measuring rod, measuring rod is through setting on mounting seat and can be axially moved, the end of measuring rod close to installation area is vertically provided with pressing plate, and the free end of pressing plate is connected with coil spring, the side of mounting seat away from installation area is detachably provided with first test film, first test film is oppositely arranged with measuring rod, when rock drilling rig is maintained eligible, measuring rod can push first test film to occur elastic deformation.The utility model can quantify the impact force and displacement output by rock drilling rig after maintenance, improve judgment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace opening machines, and in particular to a test fixture for a rock drilling device used in blast furnace opening machines. Background Technology

[0002] The tapping machine mainly uses a rock-drilling device to open the blast furnace taphole and release molten iron. The tapping machine is generally composed of a base, cross arm, traveling rail beam, hook, hook cylinder, swing mechanism, and rock-drilling device. It is powered by a hydraulic system to perform the tapping work. The rock-drilling device is driven by the hydraulic system to move on the traveling rail beam to the taphole position on the blast furnace to open the taphole. The rock-drilling device operates under harsh conditions such as high load, high temperature radiation, and dust for a long time. It often experiences malfunctions such as oil leakage, no rotation, and no impact. When the rock-drilling device malfunctions, its impact force and output displacement cannot meet the standards, which can easily cause major accidents such as blast furnace blasting blockage or blasting stoppage. If the rock-drilling device is not repaired in time, it will also cause the blast furnace to be unable to tap iron normally.

[0003] In existing technologies, after replacing seals, piston rods, and other offline maintenance on rock drilling devices, an offline no-load test run is required to ensure the quality of the maintenance. This is generally done by experienced maintenance personnel who listen to the sound of the rock drilling device working and observe its vibration and extension / retraction.

[0004] When using the above methods for judgment, relying entirely on the skill level of maintenance personnel makes it impossible to quantify the output impact force and displacement of the rock drilling device, which often leads to misjudgments. This results in numerous problems after the rock drilling device is put into operation under load, thus affecting blast furnace production. Utility Model Content

[0005] To address the technical problem of difficulty in offline testing and inspection of the rock drilling device of a blast furnace opening machine in the prior art, this utility model provides a test fixture for the rock drilling device of a blast furnace opening machine. It can quantify the impact force and displacement output by the rock drilling device after maintenance, improve the accuracy of judgment, and avoid repeated disassembly and maintenance after installation.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a test fixture for a rock drilling device for a blast furnace opening machine, including a base frame, the base frame being divided into an installation area and a test area. The installation area is used to install the rock drilling device, and the test area is provided with a mounting base. A helical spring is horizontally arranged on the mounting base, with the free end of the helical spring facing the installation area. A measuring rod is coaxially arranged inside the helical spring, the measuring rod passing through the mounting base and capable of axial movement. A pressure plate is vertically arranged at the end of the measuring rod near the installation area, the pressure plate being connected to the free end of the helical spring. A first test membrane is detachably arranged on the side of the mounting base away from the installation area. The first test membrane is arranged opposite to the measuring rod. When the rock drilling device is repaired and qualified, the measuring rod can push the first test membrane to undergo elastic deformation.

[0007] This invention, through the combination of a helical spring, a measuring rod, and a first test membrane, allows for a direct visual assessment of whether a rock drilling device has passed maintenance. Furthermore, by incorporating a helical spring, inaccurate measurements due to impact inertia of the measuring rod can be avoided, and automatic reset facilitates repeated testing, resulting in more accurate and reliable judgment.

[0008] Furthermore, the spring constant of the helical spring is k.

[0009] ,

[0010] in La represents the lower limit of the impact force output by the rock drilling device when it is working normally, and La represents the lower limit of the displacement output by the rock drilling device when it is working normally.

[0011] This invention determines the elastic coefficient of the helical spring based on the impact force and displacement set by the rock drilling device. It can simultaneously detect whether the impact force of the rock drilling device meets the requirements, avoiding the situation where the displacement meets the requirements but the impact does not, thus failing to meet the requirements for online use and improving the reliability of the detection.

[0012] Furthermore, the diameter of the measuring rod is d1, and the diameter of the helical spring is d2, where d2-1.5mm≤d1≤d2-1mm.

[0013] This invention improves detection accuracy by setting the diameter of the measuring rod to be close to that of the helical spring, thus preventing the helical spring from being misaligned.

[0014] Furthermore, it also includes a second test membrane, which is located in front of the first test membrane along the direction in which the rock drilling device extends. The positions of the first test membrane and the second test membrane from the end of the measuring rod are L1 and L2, respectively, where L1∈[La, L+a], L+a<L2, and L+a is the upper limit value of the displacement output by the rock drilling device when it is working normally.

[0015] This invention can detect excessive displacement of the rock drilling device by setting a second test membrane.

[0016] Furthermore, a support is provided on the side of the mounting base away from the mounting area. A receiving cavity is provided on the support near the mounting base. Along the extension and retraction direction of the rock drilling device, two mounting grooves are provided parallel to each other at the end of the support away from the mounting base. The mounting grooves are coaxially arranged with the measuring rod. An installation port is also provided on the upper part of the support. The installation port communicates with the corresponding mounting groove. A mounting ring is provided in each of the two mounting grooves. The upper part of the mounting ring extends out of the installation port. The first test membrane and the second test membrane are respectively provided on the two mounting rings. The mounting rings can enter and exit the mounting grooves from the installation port.

[0017] This utility model facilitates the assembly and disassembly of the mounting ring through the mounting groove and mounting port.

[0018] Furthermore, the mounting ring includes two interlocking rings, a first ring and a second ring, with the first test membrane or the second test membrane disposed between the first ring and the second ring.

[0019] Furthermore, a handle is connected to the base frame, and rollers are provided at the bottom of the base frame.

[0020] Furthermore, a lifting cylinder is provided at the lower part of the base frame, the piston rod of the lifting cylinder is connected to the base frame, and a support plate is provided at the bottom of the cylinder body of the lifting cylinder.

[0021] This invention improves safety by incorporating a lifting cylinder to prevent the base frame from moving during testing.

[0022] As can be seen from the above technical solutions, this utility model has the following advantages:

[0023] This utility model provides a test fixture for a rock drilling device in a blast furnace opening machine. Through the cooperation of a helical spring, a measuring rod, and a first test membrane, it allows for a direct visual inspection of whether the rock drilling device is up to standard after maintenance. Furthermore, the helical spring prevents inaccurate measurements due to impact inertia and enables automatic reset for repeated testing, resulting in more accurate and reliable judgment. By determining the elastic coefficient of the helical spring based on the set impact force and displacement of the rock drilling device, it is possible to simultaneously detect whether the impact force of the rock drilling device meets the requirements, avoiding situations where the displacement meets the requirements but the impact force does not, thus improving the reliability of the test. Setting the diameter of the measuring rod close to that of the helical spring prevents the helical spring from being misaligned, improving the accuracy of the test. The bearing prevents the measuring rod from being cantilevered, avoiding drooping of the end due to gravity, further improving the accuracy of the test. The second test membrane can detect excessive displacement of the rock drilling device. The mounting groove and mounting opening facilitate the installation and removal of the mounting ring. The lifting cylinder prevents the base frame from moving during testing, improving safety. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0026] Figure 2 This is a schematic diagram of the assembly structure of the measuring rod, pressure plate, helical spring and mounting base in a specific embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the assembly structure of the support and mounting ring in a specific embodiment of this utility model.

[0028] Figure 4 This is a schematic diagram of the support structure in a specific embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the assembly structure of the mounting ring and the first test membrane in a specific embodiment of this utility model.

[0030] In the diagram, 1. Handle; 2. Rock drilling device; 3. Pressure plate; 4. Helical spring; 5. Measuring rod; 6. Support; 7. Base frame; 8. Roller; 9. Support plate; 10. Lifting cylinder; 11. Receiving cavity; 12. Mounting ring; 13. Mounting port; 14. Mounting groove; 15. Ring 1; 16. Ring 2; 17. Mounting seat; 18. Second test membrane; 19. First test membrane; 20. Mounting area; 21. Test area; 22. Rubber material. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0032] like Figures 1 to 3 As shown in the figure, this specific embodiment provides a test fixture for a rock drilling device for a blast furnace opening machine, including a base frame 7, a helical spring 4, a measuring rod 5, and a first test membrane 19. The base frame 7 is divided into an installation area 20 and a test area 21. The installation area 20 is used to install and fix the rock drilling device 2 by bolts. The test area 21 is horizontally provided with a mounting base 17, which has a U-shaped structure. A helical spring 4 is horizontally provided on the mounting base 17, with its free end facing the installation area 20. A measuring rod 5 is coaxially provided inside the helical spring 4. The measuring rod 5 passes through the mounting base 17 and can move axially. A pressure plate 3 is vertically provided at the end of the measuring rod 5 near the installation area 20. The measuring rod 5 and the pressure plate 3 are an integrated structure. The pressure plate 3 is connected to the free end of the helical spring 4. A first test membrane 19 is detachably installed on the side of the mounting base 17 away from the mounting area 20. The first test membrane 19 is positioned opposite the measuring rod 5, and the distance between the first test membrane 19 and the measuring rod 5 is L1, where L1∈[La, L+a]. L is the axial movement distance set when the rock drilling device 2 is working normally, 2a is the allowable deviation bandwidth, L+a is the upper limit of the displacement output when the rock drilling device is working normally, and La is the lower limit of the displacement output when the rock drilling device is working normally. When the rock drilling device 2 extends, the helical spring 4 is compressed, and the compression distance of the helical spring 4 is the output displacement of the rock drilling device 2, which pushes the measuring rod 5 to extend in the direction of the test area 21. The extension amount of the measuring rod 5 is the compression amount. When the rock drilling device 2 is repaired and qualified, the measuring rod 5 can push the first test membrane 19 to undergo elastic deformation.

[0033] This specific embodiment, through the cooperation of the helical spring 4, the measuring rod 5, and the first test membrane 19, allows for a direct visual observation of whether the rock drilling device 2 is qualified after maintenance. Furthermore, by setting the helical spring 4, it is possible to avoid inaccurate measurements due to impact inertia of the measuring rod 5, while also enabling automatic reset for repeated testing, resulting in more accurate and reliable judgment.

[0034] In the prior art, the displacement and impact force of the rock drilling device 2 need to meet the requirements. In order for this device to have the function of measuring impact force, in this application, the elastic coefficient of the helical spring 4 is k.

[0035] ,

[0036] in, Let k be the lower limit of the impact force output by the rock drilling device 2 when it is working normally, and let La be the lower limit of the displacement output by the rock drilling device 2 when it is working normally. With this setting, when the axial movement of the measuring rod 5 causes the first test membrane 19 to undergo elastic deformation, the elastic force generated by the helical spring 4, which is the impact force of the rock drilling device 2 in the test, will definitely be greater than the lower limit of the impact force set during normal operation. This ensures that when the output displacement of the rock drilling device 2 meets the requirements, its output impact force will also meet the requirements. If k is set too large or too small, even if the first test membrane 19 undergoes elastic deformation, it does not mean that the impact force meets the requirements. It is necessary to test the impact force through other methods. After setting k according to this specific implementation method, the impact force and output displacement can be tested simultaneously.

[0037] like Figure 2 As shown, in order to avoid the helical spring 4 being bent by the rock drilling device 2 and affecting the accuracy of the detection, in this specific embodiment, the diameter of the measuring rod 5 is d1, the diameter of the helical spring 4 is d2, d2-1.5mm≤d1≤d2-1mm, and the measuring rod 5 plays a supporting role for the helical spring 4.

[0038] like Figure 1 and Figure 3As shown, since the impact force and axial displacement of the rock drilling device 2 cannot be too large, in order to facilitate the detection of excessive situations, this specific embodiment also includes a second test membrane 18. Along the direction of the rock drilling device 2, the second test membrane 18 is located in front of the first test membrane 19. The positions of the first test membrane 19 and the second test membrane 18 from the end of the measuring rod 5 are L1 and L2, respectively, where L+a<L2. When the axial movement of the measuring rod 5 is too large, it penetrates the first test membrane 19 and causes elastic deformation of the second test membrane 18. This means that the axial movement distance exceeds the upper limit of L, and the rock drilling device 2 needs to be adjusted. The first test membrane 19 and the second test membrane 18 are made of rubber or silicone. In this specific embodiment, transparent silicone is used for easy observation. In addition, a rubber protective pad 22 is provided at the end of the measuring rod 5 to avoid puncturing the first test membrane 19 and the second test membrane 18.

[0039] like Figures 3 to 5 As shown, furthermore, to facilitate the disassembly and assembly of the first test membrane 19 and the second test membrane 18, a support 6 is provided on the side of the mounting base 17 away from the mounting area 20. A receiving cavity 11 is provided on the support 6 near the mounting base 17. Along the extension and retraction direction of the rock drilling device 2, two mounting grooves 14 are arranged parallel to each other at the end of the support 6 away from the mounting base 17. The mounting grooves 14 are vertically arranged and coaxial with the measuring rod 5. An installation opening 13 is also provided on the upper part of the support 6, communicating with the corresponding mounting groove 14. An installation ring 12 is provided in each of the two mounting grooves 14. The upper part of the mounting ring 12 extends out of the mounting port 13. The two mounting rings 12 are provided with the first test membrane 19 and the second test membrane 18. The mounting ring 12 can enter and exit the mounting groove 14 through the mounting port 13. The mounting ring 12 includes two interlocking rings 15 and 16. Specifically, the interlocking end face of ring 15 is provided with a hole, and the corresponding position of the interlocking end face of ring 16 is provided with a shaft that can penetrate into the hole. The first test membrane 19 or the second test membrane 18 is disposed between ring 15 and ring 16, and both the first test membrane 19 and the second test membrane 18 are provided with holes corresponding to the shaft.

[0040] like Figure 1 As shown, for ease of movement, a handle 1 is connected to the base frame 7, and rollers 8 are provided at the bottom of the base frame 7. Furthermore, to prevent the base frame 7 from moving when impacted by the rock drilling device 2, a lifting cylinder 10 is provided at the bottom of the base frame 7. The piston rod of the lifting cylinder 10 is connected to the base frame 7, and a support plate 9 is provided at the bottom of the cylinder body of the lifting cylinder 10. When working, the lifting cylinder 10 extends, and the support plate 9 contacts the ground. As it continues to extend, it can lift the rollers 8 away from the ground, and the support plate 9 is stably supported on the ground.

[0041] In this specific embodiment, a mounting hole is provided on the mounting base 17 near the measuring rod 5. The spring wire of the helical spring 4 can be rotated into the mounting hole. The mounting hole has an arc-shaped structure to accommodate a part of the end of the spring wire of the helical spring 4. After installation, expanding foam needs to be applied to the opening of the mounting hole to fix the position of the helical spring 4. Similarly, a corresponding mounting hole is also provided on the end face of the pressure plate 3. After installation, expanding foam also needs to be applied. During installation, the helical spring 4 is first installed on the pressure plate 3, and then the measuring rod 5 is inserted into the mounting base 17. Then, the pressure plate 3 is rotated so that the other end of the helical spring 4 is connected to the mounting base 17.

[0042] The process is as follows:

[0043] Based on the output displacement and impact force set by the rock drilling device 2, determine the corresponding helical spring 4, ensuring that the natural length of the spring is less than the distance between the impact surface of the rock drilling device 2 and the mounting base 17. Install the rock drilling device 2 in the installation area 20, assemble the pressure plate 3 and the helical spring 4, and insert the first test membrane 19 and the second test membrane 18 at the corresponding positions on the support 6. Connect the rock drilling device 2 to the hydraulic station so that the rock drilling device 2 works under the set pressure and conducts an offline test run. If the measuring rod 5 can cause the first test membrane 19 to undergo elastic deformation and cannot contact the second test membrane 18, it means that the maintenance is qualified. If it cannot contact the first test membrane 19, it means that the extension distance and impact force of the rock drilling device 2 are not up to standard. If the first test membrane 19 is punctured and causes the second test membrane 18 to undergo elastic deformation or be punctured, it means that the axial movement distance is too long and the impact force is too large, requiring adjustment.

[0044] As can be seen from the above specific embodiments, this utility model has the following beneficial effects:

[0045] 1. Through the cooperation of the helical spring 4, the measuring rod 5 and the first test membrane 19, it is possible to directly see whether the rock drilling device 2 is qualified after maintenance. Furthermore, by setting the helical spring 4, it is possible to avoid inaccurate measurement due to impact inertia of the measuring rod 5, and at the same time, it can achieve automatic reset to facilitate repeated testing, making the judgment more accurate and reliable.

[0046] 2. By determining the elastic coefficient of the helical spring 4 based on the impact force and displacement set by the rock drilling device 2, it is possible to simultaneously detect whether the impact force of the rock drilling device 2 meets the requirements, thus avoiding the situation where the displacement meets the requirements but the impact does not, which would still fail to meet the requirements for online use and improve the reliability of the detection.

[0047] 3. By setting the diameter of the measuring rod 5 to be closer to that of the helical spring 4, the helical spring 4 can be prevented from being bent out of shape, thus improving the accuracy of the test.

[0048] 4. By setting bearings, the measuring rod 5 is prevented from being set as a cantilever beam, and the end of the measuring rod 5 is prevented from drooping due to gravity, thus improving the accuracy of the test;

[0049] 5. By setting the second test membrane 18, the situation where the rock drilling device 2 is displaced too far can be detected;

[0050] 6. The mounting groove 14 and mounting port 13 facilitate the installation and removal of the mounting ring 12;

[0051] 7. By setting up lifting cylinder 10, the base frame 7 is prevented from moving during the test, thus improving safety.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present 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 present invention. Therefore, the present 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 test fixture for a rock drilling device used in a blast furnace opening machine, comprising a base frame (7), characterized in that, The base frame (7) is divided into an installation area (20) and a test area (21). The installation area (20) is used to install the rock drilling device. The test area (21) is provided with a mounting base (17). A helical spring (4) is horizontally arranged on the mounting base (17), and the free end of the helical spring (4) faces the installation area (20). A measuring rod (5) is coaxially arranged inside the helical spring (4). The measuring rod (5) is installed through the mounting base (17) and can move axially. A pressure plate (3) is vertically arranged at one end of the measuring rod (5) near the mounting area (20). The pressure plate (3) is connected to the free end of the helical spring (4). A first test membrane (19) is detachably installed on the side of the mounting base (17) away from the mounting area (20). The first test membrane (19) is arranged opposite to the measuring rod (5). When the rock drilling device is repaired and qualified, the measuring rod (5) can push the first test membrane (19) to undergo elastic deformation.

2. The test fixture for the rock drilling device used in a blast furnace opening machine as described in claim 1, characterized in that, The spring constant of the helical spring (4) is k. , in, La represents the lower limit of the impact force output by the rock drilling device when it is working normally, and La represents the lower limit of the displacement output by the rock drilling device when it is working normally.

3. The test fixture for the rock drilling device used in a blast furnace opening machine as described in claim 2, characterized in that, The diameter of the measuring rod (5) is d1, and the diameter of the helical spring (4) is d2, where d2-1.5mm≤d1≤d2-1mm.

4. The test fixture for a rock drilling device for a blast furnace opening machine as described in any one of claims 2-3, characterized in that, It also includes a second test membrane (18), which is located in front of the first test membrane (19) along the direction of the rock drilling device. The first test membrane (19) and the second test membrane (18) are located at L1 and L2 from the end of the measuring rod (5), respectively. L1∈[La, L+a], L+a<L2, and L+a is the upper limit value of the displacement output by the rock drilling device when it is working normally.

5. The test fixture for the rock drilling device used in a blast furnace opening machine as described in claim 4, characterized in that, A support (6) is provided on the side of the mounting base (17) away from the mounting area (20). A receiving cavity (11) is provided on the end of the support (6) near the mounting base (17). Along the extension and retraction direction of the rock drilling device, two mounting grooves (14) are arranged parallel to each other on the end of the support (6) away from the mounting base (17). The mounting grooves (14) are coaxially arranged with the measuring rod (5). An installation port (13) is also provided on the upper part of the support (6). The installation port (13) communicates with the corresponding mounting groove (14). An installation ring (12) is provided in each of the two mounting grooves (14). The upper part of the installation ring (12) extends out of the installation port (13). The first test membrane (19) and the second test membrane (18) are respectively provided on the two mounting rings (12). The installation ring (12) can enter and exit the mounting groove (14) from the installation port (13).

6. The test fixture for the rock drilling device for a blast furnace opening machine as described in claim 5, characterized in that, The mounting ring (12) includes two interlocking rings, a first ring (15) and a second ring (16), with the first test membrane (19) or the second test membrane (18) disposed between the first ring (15) and the second ring (16).

7. The test fixture for a rock drilling device for a blast furnace opening machine as described in claim 6, characterized in that, The base frame (7) is connected to a handle (1), and the base frame (7) is provided with a roller (8) at the bottom.

8. The test fixture for the rock drilling device for a blast furnace opening machine as described in claim 7, characterized in that, A lifting cylinder (10) is provided at the lower part of the base frame (7). The piston rod of the lifting cylinder (10) is connected to the base frame (7). A support plate (9) is provided at the bottom of the cylinder body of the lifting cylinder (10).

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