Automatic loading and unloading protection device for steel wire type horizontal displacement meter

Abstract

The utility model belongs to the technical field of steel wire tension testing, and particularly relates to an automatic loading and unloading protection device of a steel wire type horizontal displacement meter, which comprises indium steel wires, a testing support is arranged on one side of a wall body, a fixed counterweight and an adjustable movable counterweight are hung at the bottom end of each indium steel wire, a displacement sensor is introduced into the automatic loading and unloading device, and the automatic loading and unloading protection device is connected with the testing support. A current sensor is additionally arranged in a control circuit to serve as a reliability enhancing means, the problem of over-limit stroke caused by device failure in the loading and unloading process is solved, the online self-checking function of the displacement condition in the loading and unloading process is added, the reliability problem in the automatic loading and unloading process is well solved, meanwhile, detection equipment can be better guaranteed, and the reliability of the loading and unloading process is improved. The upper limit switch and the lower limit switch are arranged, the stable operation state of the structure can be judged according to the interval value limit, a motor power source can be cut off in time through anomaly detection, an instruction is sent to operation and maintenance personnel, the whole detection device is protected, and damage to equipment can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel wire tension testing, in particular to an automatic loading and unloading protection device for a steel wire type horizontal displacement meter. Background Art

[0002] The wire horizontal displacement meter is a monitoring instrument that uses a constant tension wire to measure the horizontal displacement of the monitoring point along the indium wire direction. As a common monitoring device that can effectively obtain the structural stability of the monitored hydraulic structure, it is widely used in engineering practice.

[0003] By measuring the length change of the indium steel wire or steel cable fixed on the anchor plate at one end, the horizontal displacement of the measuring point can be monitored. It is suitable for long-term observation of internal displacement of soil bodies such as earth-rock dams, panel rockfill dams, earth embankments, slopes, etc. The measurement of displacement change is specifically realized by transmitting the indium steel wire or steel cable to the displacement sensor. Generally, multiple measuring points are arranged at the same elevation and the same section. The overall horizontal displacement of a certain section at the elevation can be realized by synthesizing the horizontal displacement of multiple measuring points. The span is generally on the order of 100 meters.

[0004] When measuring, the steel wire horizontal displacement meter needs to apply constant force to the indium steel wire, which is generally achieved by adding weights. The process of adding weights is called loading operation, and when loading weights, the pressure range is instantly increased, which cannot achieve accurate testing of the stress degree of the indium steel wire. In addition, during the automatic loading and unloading process, the loading and unloading process cannot be limited and protected, which can easily cause damage to the equipment and make the detection process unreliable. Therefore, in view of the above problems, an automatic loading and unloading protection device for the steel wire horizontal displacement meter is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, the utility model proposes an automatic loading and unloading protection device for a wire-type horizontal displacement meter to solve the reliability problems that may be caused by component failure during the automatic loading and unloading process of the wire-type horizontal displacement meter.

[0006] The technical solution adopted by the utility model to solve the technical problem is an automatic loading and unloading protection device for a steel wire type horizontal displacement meter, comprising an indium steel wire, one end of the indium steel wire is fixed on a wall, a test bracket is arranged on one side of the wall, a bearing bracket is arranged on the top of the test bracket, a pulley is rotatably arranged on the bearing bracket, each indium steel wire is respectively wound around each pulley, a fixed counterweight is hoisted at the bottom end of each indium steel wire, a sliding support rod is rotatably connected to the top side of the controlled traction frame, a bearing frame is hingedly arranged on the top side of the sliding support rod, a variable counterweight is arranged on the bearing frame, and a weight for applying a constant force to the indium steel wire comprises a fixed counterweight and a variable counterweight, wherein the mass of the fixed counterweight is approximately 1 / 5-1 / 4 of the variable counterweight, and the function of the fixed counterweight is to keep the indium steel wire always in a straight state, while not causing creep deformation due to excessive tension;

[0007] A controlled traction frame, a controlled traction frame is installed on the test frame, and load-bearing bearings are rotatably installed at the four corners of the bottom side of the controlled traction frame, a driving motor, a driving motor is installed on the bottom side wall of the test frame, a worm is installed at the output end of the driving motor, a screw hole is opened on the side wall of the controlled traction frame, one end of the worm is penetrated and installed in the screw hole of the side wall of the controlled traction frame, a vertical bracket, the vertical bracket is vertically fixed on the side of the test bracket, the variable counterweight and the fixed counterweight are arranged in the same vertical direction, wire holes are arranged in the variable counterweight and the bearing frame, and each indium steel wire penetrates the wire holes of the variable counterweight and the bearing frame respectively. When the device is driven by the driving motor and the controlled traction frame moves to the right through the worm gear, the sliding support rod drives the bearing frame to perform a lifting movement. As the lifting stroke increases, the weight component of the variable counterweight part borne by the bearing frame gradually increases, and the corresponding weight component acting on the indium steel wire gradually decreases until it is completely borne by the bearing frame. This process is called an unloading process;

[0008] When the device is driven by the driving motor and the controlled traction frame moves to the left through the worm gear, the sliding support rod drives the carrier frame to move downward. As the downward stroke increases, the gravity component of the variable counterweight borne by the carrier frame gradually decreases, and the corresponding gravity component acting on the indium steel wire gradually decreases and increases until it is completely borne by the indium steel wire. This process is called the loading process.

[0009] A displacement sensor is installed between the side wall of the controlled traction frame and the bottom side wall of the vertical bracket. The displacement sensor is added to monitor the horizontal displacement of the automatic loading and unloading device in real time. A displacement sensor is installed between the controlled traction frame and the vertical bracket to detect the horizontal bottom side S of the right triangle. X The length change of the sliding support rod is assumed to be l. According to the Pythagorean theorem, the vertical base S of the right triangle can be calculated. H The value of Therefore, the actual lifting and lowering of the sliding support rod can be obtained in real time through the displacement sensor. When the measured value of the displacement sensor is at S corresponding to the position of the lower limit switch, Hmin , the upper limit switch position corresponds to S Hmax When the measured value is less than S Hmin When the measured value is greater than S, it indicates that the sliding support rod has crossed the lower limit of the stroke. This is an abnormal situation and there is a risk of equipment damage. The motor power supply should be automatically cut off and a maintenance instruction should be issued to the operation and maintenance personnel. Similarly, when the measured value is greater than S Hmax When the sliding support rod exceeds the upper limit of the stroke, it is also an abnormal situation. There is a risk of equipment damage. The motor power supply should be automatically cut off and maintenance instructions should be issued to the operation and maintenance personnel.

[0010] A lateral bearing is installed at one end of the carrier frame, and the lateral bearing is arranged to roll along the side of the vertical bracket. The horizontal movement of the worm is converted into the vertical movement of the carrier frame through a right triangle with a sliding support rod as a fixed chord length.

[0011] Preferably, an upper limit switch and a lower limit switch are respectively installed on the vertical bracket, and the lateral bearing is rollingly arranged between the upper limit switch and the lower limit switch. The upper limit switch is an indicator of the limit travel position of the unloading process. When the upper limit switch is actuated, a corresponding indication signal is sent to the controller. When the controller receives the signal, it should stop the operation of the drive motor and end the unloading process.

[0012] The lower limit switch is the limit travel position indicator of the loading process. When the lower limit switch is activated, a corresponding indication signal is sent to the controller. When the controller receives the signal, it should stop the operation of the drive motor and end the loading process.

[0013] The upper limit switch and the lower limit switch respectively play the role of indicating the limit travel position, and their importance is obvious. When any one of them fails, the moving parts of the device will operate beyond the limit, causing adverse consequences such as equipment damage.

[0014] Preferably, the test stand is equipped with a controller, the controller is used to receive the trigger signal of the upper limit switch and the lower limit switch, the controller receives the sensor signal of the displacement sensor, the controller is used to control the drive motor, and the horizontal base S of the right triangle is accurately obtained through the displacement sensor. X The length change is further calculated by the Pythagorean theorem to obtain the vertical base S H The value of S corresponding to the lower limit switch position Hmin S corresponding to the upper limit switch position Hmax Perform real-time numerical comparison, and the SH value falls within [S Hmin ,S Hmax ] interval, it indicates that the automatic loading / unloading device operates normally; when SH The value is less than S Hmin When S H The value is greater than S Hmax , it indicates that the sliding support rod has exceeded the upper limit of the stroke, which is also an abnormal situation. There is a risk of equipment damage. The controller will issue an instruction to automatically cut off the power supply to the motor, and at the same time send maintenance instructions to the operation and maintenance personnel through the wireless communication module.

[0015] The utility model is beneficial in that:

[0016] The utility model sets automatic loading and unloading, and keeps the indium steel wire in a straight state by using a fixed counterweight, while preventing creep deformation due to excessive tension. When detecting the stress of the indium steel wire, the variable counterweight part realizes the loading or unloading function through the transmission device. Through the automatic loading and unloading process, the stress bearing capacity of the indium steel wire can be accurately determined during the loading and unloading process. A displacement sensor is introduced into the automatic loading and unloading device, and a current sensor is added to the control circuit as a reliability enhancement means. At the same time, a time limit condition is added, and the problem of over-limit stroke caused by device failure during the loading and unloading process is overcome. An online self-check function of the displacement situation during the loading and unloading process is added, which solves the reliability problem of the automatic loading and unloading process and can better ensure the detection equipment. An upper limit switch and a lower limit switch are set, and the stable operation state of the structure can be determined according to the interval value limit. The motor power supply can be cut off in time through abnormal detection, and instructions can be issued to the operation and maintenance personnel, so as to protect the entire detection device and reduce damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 Schematic diagram of the automatic loading and unloading and protection device structure;

[0019] Figure 2 Schematic diagram of a right triangle structure with fixed chord length;

[0020] Figure 3 Schematic diagram of the structure of the automatic loading and unloading controller of the wire horizontal displacement meter;

[0021] In the figure: 1. indium steel wire, 2. pulley, 3. variable counterweight, 4. fixed counterweight, 5. sliding support rod, 6. load-bearing bearing, 7. load-bearing frame, 8. controlled traction frame, 9. vertical bracket, 10. upper limit switch, 11. lateral bearing, 12. lower limit switch, 13. displacement sensor, 14. drive motor, 15. worm gear. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 As shown, an automatic loading and unloading protection device for a steel wire type horizontal displacement meter comprises an indium steel wire 1, one end of the indium steel wire 1 is fixed on a wall, a test bracket is arranged on one side of the wall, a load-bearing bracket is installed on the top of the test bracket, a pulley 2 is rotatably installed on the load-bearing bracket, each indium steel wire 1 is respectively wound around each pulley 2, and a fixed counterweight 4 is hoisted at the bottom end of each indium steel wire 1;

[0024] A controlled traction frame 8 is installed on the test bracket, and load-bearing bearings 6 are rotatably installed at the four corners of the bottom side of the controlled traction frame 8;

[0025] A driving motor 14 is installed on the bottom side wall of the test bracket, a worm 15 is installed at the output end of the driving motor 14, a screw hole is opened on the side wall of the controlled traction frame 8, and one end of the worm 15 is installed in the screw hole of the side wall of the controlled traction frame 8;

[0026] A vertical bracket 9, wherein the vertical bracket 9 is vertically fixed on a side of the test bracket;

[0027] A displacement sensor 13 is installed between the side wall of the controlled traction frame 8 and the bottom side wall of the vertical bracket 9 .

[0028] The top side of the controlled traction frame 8 is rotatably connected to a sliding support rod 5 , and the top side of the sliding support rod 5 is hingedly mounted with a bearing frame 7 , on which a variable counterweight 3 is provided.

[0029] A lateral bearing 11 is installed at one end of the carrier frame 7 , and the lateral bearing 11 is arranged to roll along the side of the vertical bracket 9 .

[0030] The variable counterweight 3 and the fixed counterweight 4 are arranged along the same vertical direction. Wire holes are arranged in the variable counterweight 3 and the supporting frame 7. Each indium steel wire 1 passes through the wire holes of the variable counterweight 3 and the supporting frame 7 respectively.

[0031] The upper limit switch 10 and the lower limit switch 12 are respectively installed on the vertical bracket 9, and the lateral bearing 11 is rollingly arranged between the upper limit switch 10 and the lower limit switch 12, and the horizontal base S of the right triangle is accurately obtained by the displacement sensor 13. X The length change is further calculated by the Pythagorean theorem to obtain the vertical base S H The value of S corresponding to the position of the lower limit switch 12 Hmin S corresponding to the upper limit switch 10 position Hmax Real-time numerical comparison, S H The value falls within [S Hmin ,S Hmax ] interval, it indicates that the automatic loading / unloading device operates normally; when S H The value is less than S Hmin When S H The value is greater than S Hmax When , it indicates that the sliding support rod has exceeded the upper limit of the stroke, which is also an abnormal situation. There is a risk of equipment damage. The controller issues an instruction to automatically cut off the power supply of the drive motor 14, and at the same time sends a maintenance instruction to the operation and maintenance personnel through the wireless communication module.

[0032] The test stand is equipped with a controller, which is used to receive trigger signals from the upper limit switch 10 and the lower limit switch 12 , receive sensing signals from the displacement sensor 13 , and control the drive motor 14 .

[0033] Working principle: The weights that apply constant force to the indium steel wire include a fixed weight 4 and a variable weight 3. The mass of the fixed weight 3 is about 1 / 5-1 / 4 of the variable weight 4. The function of the fixed weight 4 is to keep the indium steel wire 1 always in a straight state, while preventing creep deformation due to excessive tension.

[0034] The variable counterweight 4 part realizes the loading or unloading function through a transmission device composed of a driving motor 14, a worm 15, a lateral bearing 11, a vertical bracket 9, a controlled traction frame 8, a carrier frame 7, a load-bearing bearing 6, a sliding support rod 5 and other parts. When the device is driven by the driving motor 14 and the controlled traction frame 8 moves to the right through the transmission of the worm 15, the sliding support rod 5 drives the carrier frame 7 to perform a lifting movement. As the lifting stroke increases, the gravity component of the variable counterweight 4 part borne by the carrier frame 7 gradually increases, and the corresponding gravity component acting on the indium steel wire 1 gradually decreases until it is completely borne by the carrier frame 7. This process is called an unloading process;

[0035] When the device is driven by the driving motor 14 and the controlled traction frame 8 moves to the left through the worm 15, the sliding support rod 5 drives the carrier frame 7 to move downward. As the downward stroke increases, the gravity component of the variable counterweight 4 borne by the carrier frame 7 gradually decreases, and the gravity component acting on the indium steel wire gradually decreases and increases accordingly, until it is completely borne by the indium steel wire 1. This process is called the loading process;

[0036] The upper limit switch 10 is an indicator of the limit travel position of the unloading process. When the upper limit switch 10 is actuated, a corresponding indication signal is sent to the controller. When the controller receives the signal, it should stop the operation of the drive motor 14 and end the unloading process.

[0037] The lower limit switch 12 is an indicator of the extreme travel position of the loading process. When the lower limit switch 12 is actuated, a corresponding indication signal is sent to the controller. When the controller receives the signal, it should stop the operation of the drive motor 14 and end the loading process. The horizontal movement of the worm 14 is converted into the vertical movement of the carrier frame 7 through a right-angled triangle with the sliding support rod 5 as a fixed chord length.

[0038] According to the above working principle, the upper limit switch 10 and the lower limit switch 12 respectively play the role of indicating the limit travel position. When any one of them fails, the moving parts of the device will exceed the limit operation, thereby causing adverse consequences such as equipment damage; therefore, it is necessary to take corresponding measures against the possible failure of the upper limit switch 10 and the lower limit switch 12;

[0039] Reliability measures are added on the basis of the automatic loading and unloading device to avoid damage to electrical equipment due to failure of the upper limit switch 10 and the lower limit switch 12:

[0040] Add a displacement sensor 2 to monitor the horizontal displacement of the automatic loading and unloading device in real time. Install a displacement sensor 2 between the controlled traction frame 8 and the vertical support 9 to detect Figure 3 The horizontal base S of the right triangle X The length change of the sliding support rod 5 is assumed to be l. According to the Pythagorean theorem, the vertical base S of the right triangle can be calculated. H The numerical value of Therefore, the actual lifting and lowering of the sliding support rod 5 can be obtained in real time through the displacement sensor 2. When the measured value of the displacement sensor 2 is at S corresponding to the position of the lower limit switch 12, Hmin , the upper limit switch position 10 corresponds to S Hmax When the measured value is less than S Hmin When the measured value is greater than S, it indicates that the sliding support rod has crossed the lower limit of the stroke. This is an abnormal situation and there is a risk of equipment damage. The motor power supply should be automatically cut off and a maintenance instruction should be issued to the operation and maintenance personnel. HmaxWhen the sliding support rod exceeds the upper limit of the stroke, it is also an abnormal situation. There is a risk of equipment damage. The motor power supply should be automatically cut off and maintenance instructions should be issued to the operation and maintenance personnel.

[0041] The horizontal base S of the right triangle is accurately obtained by the displacement sensor 13 X The length change is further calculated by the Pythagorean theorem to obtain the vertical base S H The value of S corresponding to the position of the lower limit switch 12 Hmin S corresponding to the upper limit switch 10 position Hmax Real-time numerical comparison, S H The value falls within [S Hmin ,S Hmax ] interval, it indicates that the automatic loading / unloading device operates normally; when S H The value is less than S Hmin When S H The value is greater than S Hmax When , it indicates that the sliding support rod has exceeded the upper limit of the stroke, which is also an abnormal situation. There is a risk of equipment damage. The controller issues an instruction to automatically cut off the power supply of the drive motor 14, and at the same time sends a maintenance instruction to the operation and maintenance personnel through the wireless communication module.

[0042] In the description of this specification, the basic principles, main features and advantages of the utility model are shown and described above. For those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model shall fall within the scope of the utility model claimed for protection.

Claims

1. An automatic loading and unloading protection device for a wire-type horizontal displacement meter, characterized in that: include: An indium steel wire (1), one end of the indium steel wire (1) is fixed on a wall, a test bracket is arranged on one side of the wall, a load-bearing bracket is installed on the top of the test bracket, a pulley (2) is rotatably installed on the load-bearing bracket, each indium steel wire (1) is respectively wound around each pulley (2), and a fixed counterweight (4) is hoisted at the bottom end of each indium steel wire (1); A controlled traction frame (8), the test bracket is equipped with the controlled traction frame (8), and load-bearing bearings (6) are rotatably mounted at the four corners of the bottom side of the controlled traction frame (8); A driving motor (14), wherein the driving motor (14) is installed on the bottom side wall of the test bracket, a worm (15) is installed on the output end of the driving motor (14), a screw hole is opened on the side wall of the controlled traction frame (8), and one end of the worm (15) is installed in the screw hole on the side wall of the controlled traction frame (8); A vertical bracket (9), wherein the vertical bracket (9) is vertically fixed on a side of the test bracket; A displacement sensor (13), wherein the displacement sensor (13) is installed between the side wall of the controlled traction frame (8) and the bottom side wall of the vertical support (9); An upper limit switch (10) and a lower limit switch (12) are respectively mounted on the vertical bracket (9), and a lateral bearing (11) is rollingly arranged between the upper limit switch (10) and the lower limit switch (12).

2. The automatic loading and unloading protection device for a wire-type horizontal displacement meter according to claim 1 is characterized in that: The top side of the controlled traction frame (8) is rotatably connected to a sliding support rod (5), the top side of the sliding support rod (5) is hingedly mounted with a bearing frame (7), and a variable counterweight (3) is arranged on the bearing frame (7).

3. The automatic loading and unloading protection device for a wire-type horizontal displacement meter according to claim 2 is characterized in that: A lateral bearing (11) is installed at one end of the carrier frame (7), and the lateral bearing (11) is arranged to roll along the side of the vertical bracket (9).

4. The automatic loading and unloading protection device for a wire-type horizontal displacement meter according to claim 3 is characterized in that: The variable counterweight (3) and the fixed counterweight (4) are arranged along the same vertical direction. The variable counterweight (3) and the support frame (7) are both provided with wire holes, and each indium steel wire (1) passes through the wire holes of the variable counterweight (3) and the support frame (7) respectively.

5. The automatic loading and unloading protection device for a wire-type horizontal displacement meter according to claim 4 is characterized in that: The test stand is equipped with a controller, which is used to receive trigger signals from an upper limit switch (10) and a lower limit switch (12), the controller receives sensing signals from a displacement sensor (13), and the controller is used to control a drive motor (14).

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