Cable tensioning detection device

Abstract

The utility model provides a cable tensioning detection device, which relates to the technical field of force measuring devices and comprises a fixed support, a pressure sensor, a fixed pulley support, an elastic reset piece and a fixed pulley. The pressure sensor is fixedly connected with the fixed bracket or the fixed pulley bracket; the fixed pulley support is slidably arranged relative to the fixed support in the stress direction of the pressure sensor. The two ends of the elastic reset piece are connected with the fixed support and the fixed pulley support correspondingly and used for resetting the fixed pulley support after sliding. The fixed pulley is rotationally mounted on the fixed pulley bracket and is used for lapping a cable of which the tension is to be measured; according to the device, the current tension degree condition of the cable can be obtained according to the pressure of the cable on the fixed pulley, whether the liquid level probe is clamped or not is judged according to the tension degree condition of the cable, then the reel is controlled to stop winding or unwinding the cable, and the problem that the cable is stacked and knotted or snapped is avoided.

Description

Technical Field

[0001] This utility model relates to the field of force measuring device technology, specifically to a cable tension detection device. Background Technology

[0002] Automatic deep well liquid level measurement is achieved by connecting a liquid level probe to the end of a cable. In actual measurement, the detection channel of the liquid level probe is relatively narrow, which may lead to probe jamming. When the probe jams, the tension of the cable changes. For example, during the lowering of the probe using the cable, if the probe is obstructed and the reel control system does not detect the decrease in cable tension and continues to lower the cable, the entire cable will unwind and pile up in the measurement channel, causing tangling and knots during rewinding, affecting the normal operation of the liquid level measurement device. Conversely, if the probe is jammed in the measurement channel during cable rewinding, and the reel control system does not detect the increase in cable tension and continues to rewind, the cable will break, rendering the liquid level measurement device inoperable.

[0003] Among the technologies known to the inventor, tension control typically uses mechanical mechanisms to sense tension by generating displacement through force, and controls the operation of the reel through mechanical displacement. However, mechanical tension measuring devices are inconvenient to use because they are bulky, require lubrication for moving parts, and are prone to failure after wear. Utility Model Content

[0004] The purpose of this invention is to provide a cable tension detection device to solve the problems existing in the prior art. It can obtain the current cable tension based on the pressure of the cable on the fixed pulley, and determine whether the liquid level probe is stuck based on the cable tension. Then, it controls the reel to stop winding or unwinding the cable, thus avoiding problems such as cable accumulation and knotting or cable breakage.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A cable tension detection device includes a fixed bracket, a pressure sensor, a fixed pulley bracket, an elastic reset member, and a fixed pulley. The fixed bracket is fixedly connected to an installation device. The pressure sensor is fixedly connected to either the fixed bracket or the fixed pulley bracket. The fixed pulley bracket is slidably disposed relative to the fixed bracket along the direction of compression of the pressure sensor. The two ends of the elastic reset member are respectively connected to the fixed bracket and the fixed pulley bracket, and are used to reset the fixed pulley bracket after slippage. The fixed pulley is rotatably mounted on the fixed pulley bracket, and is used to wind the cable with the tension to be measured.

[0007] As one embodiment, the fixed bracket is provided with a through hole, and the cable tension detection device further includes a guide post. One end of the guide post is fixed to the fixed pulley bracket, and the other end passes through the through hole. A limiting block is fixed to the end of the guide post that passes through the through hole to prevent this end from coming out of the through hole.

[0008] In one embodiment, the guide post is a screw, and the limiting block is a nut that is threadedly connected to the screw.

[0009] In one embodiment, the screw is threadedly connected to the fixed pulley bracket.

[0010] In one embodiment, the fixing bracket includes a first end plate and a second end plate connected in an L-shape. The first end plate is used to connect with the installation device, and the pressure sensor is fixed on the second end plate. The second end plate is also provided with the through hole.

[0011] In one embodiment, the first end plate is bolted to the mounting device, and the first end plate is provided with mounting holes for inserting bolts.

[0012] In one embodiment, the fixed pulley bracket includes a connecting plate and a mounting plate connected to the connecting plate. The connecting plate is fixedly connected to the guide column, and the mounting plate is rotatably connected to the fixed pulley.

[0013] In one embodiment, two mounting plates are arranged in parallel, and a pulley shaft is connected between the two mounting plates, on which the fixed pulley is rotatably mounted.

[0014] In one embodiment, the elastic reset member includes a compression spring, which passes through the guide post, and both ends of the compression spring are fixedly connected to the fixed bracket and the fixed pulley bracket, respectively.

[0015] In one embodiment, the pressure sensor is connected to the fixed bracket by bolts.

[0016] This utility model has the following technical advantages over the prior art:

[0017] The cable tension detection device of this invention can obtain the current cable tension based on the pressure of the cable on the fixed pulley, and determine whether the liquid level probe is stuck based on the cable tension. In turn, it controls the reel to stop winding or unwinding the cable, thus avoiding problems such as cable accumulation and knotting or cable breakage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the cable tension detection device in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 The main view;

[0021] Figure 3 for Figure 1 The left view;

[0022] Figure 4 for Figure 1 A bottom view;

[0023] Figure 5 This is a schematic diagram of the structure of the fixed pulley bracket in one embodiment of the present invention;

[0024] Figure 6 for Figure 5 The main view;

[0025] Figure 7 for Figure 5 The left view;

[0026] Figure 8 for Figure 5 Top view;

[0027] Figure 9 This is a schematic diagram of the structure of the fixed bracket in one embodiment of the present invention;

[0028] Figure 10 for Figure 9 The main view;

[0029] Figure 11 for Figure 9 The left view;

[0030] Figure 12 for Figure 9 Top view;

[0031] Figure 13 This is a schematic diagram illustrating the use of the cable tension detection device in one embodiment of the present invention;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Fixed bracket; 2. Pressure sensor; 3. Fixed pulley bracket; 4. Compression spring; 5. Fixed pulley; 6. Through hole; 7. Screw; 8. Nut; 9. Pulley shaft; 10. First end plate; 11. Second end plate; 12. Mounting hole; 13. Mounting plate; 14. Connecting plate; 15. Reel; 16. Cable; 17. Liquid level probe. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] The purpose of this invention is to provide a cable tension detection device to solve the problems existing in the prior art. It can obtain the current cable tension based on the pressure of the cable on the fixed pulley, and determine whether the liquid level probe is stuck based on the cable tension. Then, it controls the reel to stop winding or unwinding the cable, thus avoiding problems such as cable accumulation and knotting or cable breakage.

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1-4 As shown, this embodiment provides a cable tension detection device, including a fixed bracket 1, a pressure sensor 2, a fixed pulley bracket 3, an elastic reset member, and a fixed pulley 5. The fixed bracket 1 is fixedly connected to the installation equipment, and the connection method can be welding or bolting. To facilitate replacement of the cable tension detection device, a bolting connection is chosen in this embodiment. The pressure sensor 2 is fixedly connected to either the fixed bracket 1 or the fixed pulley bracket 3, and the pressure sensor 2 is located between the fixed bracket 1 and the fixed pulley bracket 3. The fixed pulley bracket 3 is slidably positioned relative to the fixed bracket 1 along the direction of the pressure sensor 2. The two ends of the elastic reset member are respectively connected to the fixed bracket 1 and the fixed pulley bracket 3, used to reset the fixed pulley bracket 3 after sliding. The fixed pulley 5 is rotatably mounted on the fixed pulley bracket 3, and the fixed pulley 5 is used to align the cable 16 receiving the tension measurement.

[0038] In use, the fixed bracket 1 is fixed to the mounting equipment, which can be a winding and unwinding device for the cable 16. Specifically, the fixed bracket 1 can be fixed to the fixed frame of the winding and unwinding device. During fixing, the cable 16 is wound around the groove of the fixed pulley 5. After the liquid level probe 17 is fixed below the cable 16, the cable 16 is taut under the gravity of the liquid level probe 17, and it overcomes the elastic force of the elastic reset member to apply pressure to the fixed pulley 5. Under the action of pressure, the fixed pulley bracket 3 moves toward or away from the fixed bracket 1. It should be noted that the movement of the fixed pulley bracket 3 toward or away from the fixed bracket 1 is based on two different structural forms. When the fixed pulley bracket 3 moves toward the fixed bracket 1, the elastic reset member is compressed, and the fixed pulley bracket 3 acts on the pressure sensor 2, increasing the pressure value measured by the pressure sensor 2. With this structural method, the pressure sensor 2 can be unaffected by pressure under natural conditions. When the fixed pulley bracket 3 moves away from the fixed bracket 1, the elastic reset member is stretched, and the pressure value measured by the pressure sensor 2 decreases. With this structure, the pressure sensor 2 would be under considerable pressure in its natural state. This embodiment uses a structure where the pressure sensor 2 is not under pressure in its natural state. The pressure sensor 2 will display the pressure value it receives (of course, the pressure value measured by the pressure sensor 2 is not actually equal to the pressure of the cable 16 on the fixed pulley 5, because the pressure of the cable 16 on the fixed pulley 5 also needs to overcome the elastic force of the elastic reset member, and there may be a certain angle between the direction of the pressure of the cable 16 on the fixed pulley 5 and the direction of the compression of the pressure sensor 2 by the fixed pulley bracket 3; however, those skilled in the art can calculate the pressure value of the cable 16 on the fixed pulley 5 from the value measured by the pressure sensor 2). If the liquid level probe 17 becomes stuck during cable release, the tension of the cable 16 will decrease, and the pressure of the cable 16 on the fixed pulley 5 will also decrease. The pressure sensor 2 feeds back the pressure value to the reel 15 control system in real time, and the reel 15 control system stops releasing the cable based on the change in pressure value. If the liquid level probe 17 gets stuck during the cable winding process, the tension of the cable 16 will increase further. Correspondingly, the pressure of the cable 16 on the fixed pulley 5 will also increase. When the control system of the reel 15 determines that the tension of the cable 16 has exceeded the set range, it will stop winding.

[0039] Therefore, the cable tension detection device in this embodiment can obtain the current tension of the cable 16 based on the pressure of the cable 16 on the fixed pulley 5, and determine whether the liquid level probe 17 is stuck based on the tension of the cable 16, thereby controlling the reel 15 to stop winding or unwinding the cable, so as to avoid the problem of the cable 16 accumulating and knotting or the cable 16 being pulled apart.

[0040] It should be noted that although the cable tension detection device in this embodiment cannot directly measure the tension of cable 16, those skilled in the art can roughly determine the current tension of cable 16 based on its tension state (i.e., the pressure exerted by cable 16 on the fixed pulley 5). Furthermore, the tension of cable 16 is always positively correlated with the pressure value measured by pressure sensor 2. Even without knowing the specific tension of cable 16, when the pressure change of cable 16 on the fixed pulley 5 exceeds a certain range of normal values, it can be concluded that the liquid level probe 17 is stuck, and at this point, controlling the reel 15 to stop is also feasible.

[0041] When fixing the frame, the angle between the pressure direction of the cable 16 on the fixed pulley 5 and the sliding direction of the fixed pulley bracket 3 relative to the fixed bracket 1 should be as small as possible, so as to ensure that the value measured by the pressure sensor 2 is as consistent as possible with the pressure of the cable 16 on the fixed pulley 5.

[0042] like Figures 5-8 As shown, to ensure the stability of the sliding of the fixed pulley bracket 3, a through hole 6 is provided on the fixed bracket 1 in this embodiment. The cable tension detection device also includes a guide post. One end of the guide post is fixed to the fixed pulley bracket 3, and the other end passes through the through hole 6. A limiting block is fixed to the end of the guide post passing through the through hole 6 to prevent this end from coming out of the through hole 6. As one embodiment, the guide post is a screw 7, and the limiting block is a nut 8 threadedly connected to the screw 7.

[0043] As one embodiment, the screw 7 is threadedly connected to the fixed pulley bracket 3, which facilitates the disassembly and replacement of the screw 7; alternatively, the end of the screw 7 can be welded to the fixed pulley bracket 3.

[0044] In this embodiment, the pressure sensor 2 can be fixed on a mounting bracket or on a fixed pulley bracket 3. In this embodiment, the pressure sensor 2 is fixed on the mounting bracket 1. Figures 9-12 As shown, the fixed bracket 1 includes a first end plate 10 and a second end plate 11 connected in an L-shape. The first end plate 10 is used to connect with the installation equipment. The pressure sensor 2 is fixed on the second end plate 11 by bolts. The second end plate 11 is also provided with a through hole 6 for the screw 7 to pass through.

[0045] In one embodiment, the first end plate 10 is bolted to the mounting device, and the first end plate 10 is provided with mounting holes 12 for inserting bolts.

[0046] As one embodiment, the fixed pulley bracket 3 includes a connecting plate 14 and a mounting plate 13 connected to the connecting plate 14. The connecting plate 14 is fixedly connected to the screw 7. Two mounting plates 13 are arranged in parallel, and a pulley shaft 9 is connected between the two mounting plates 13. A fixed pulley 5 is rotatably mounted on the pulley shaft 9.

[0047] As one embodiment, the elastic reset member includes a compression spring 4 that passes through the screw 7, and the two ends of the compression spring 4 are fixedly connected to the second end plate 11 and the connecting plate 14, respectively.

[0048] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0049] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cable tension detection device, characterized in that, Includes a fixed bracket, a fixed pulley bracket, a pressure sensor, an elastic reset component, and a fixed pulley; The fixed bracket is fixedly connected to the installation equipment; The pressure sensor is fixedly connected to the fixed bracket or the fixed pulley bracket, and the pressure sensor is located between the fixed bracket and the fixed pulley bracket; Along the direction of pressing the pressure sensor, the fixed pulley bracket is slidably disposed relative to the fixed bracket; The two ends of the elastic reset member are respectively connected to the fixed bracket and the fixed pulley bracket, and are used to reset the fixed pulley bracket after it has slid. The fixed pulley is rotatably mounted on the fixed pulley bracket, and the fixed pulley is used to wind the cable with the tension to be measured; The fixed bracket is provided with a through hole, and the cable tension detection device also includes a guide post. One end of the guide post is fixed to the fixed pulley bracket, and the other end passes through the through hole. A limiting block is fixed to the end of the guide post that passes through the through hole to prevent this end from coming out of the through hole.

2. The cable tension detection device according to claim 1, characterized in that, The guide post is a screw, and the limiting block is a nut that is threadedly connected to the screw.

3. The cable tension detection device according to claim 2, characterized in that, The screw is threadedly connected to the fixed pulley bracket.

4. The cable tension detection device according to claim 3, characterized in that, The fixing bracket includes a first end plate and a second end plate connected in an L-shape. The first end plate is used to connect with the installation device, and the pressure sensor is fixed on the second end plate. The second end plate is also provided with the through hole.

5. The cable tension detection device according to claim 4, characterized in that, The first end plate is bolted to the mounting equipment, and the first end plate is provided with mounting holes for inserting bolts.

6. The cable tension detection device according to claim 1, characterized in that, The fixed pulley bracket includes a connecting plate and a mounting plate connected to the connecting plate. The connecting plate is fixedly connected to the guide column, and the mounting plate is rotatably connected to the fixed pulley.

7. The cable tension detection device according to claim 6, characterized in that, Two mounting plates are arranged in parallel, and a pulley shaft is connected between the two mounting plates. The fixed pulley is rotatably mounted on the pulley shaft.

8. The cable tension detection device according to claim 1, characterized in that, The elastic reset component includes a compression spring, which passes through the guide post, and its two ends are fixedly connected to the fixed bracket and the fixed pulley bracket, respectively.

9. The cable tension detection device according to claim 1, characterized in that, The pressure sensor is connected to the fixed bracket by bolts.

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