A simple logging cable tension measurement and tension sudden change alarm device

Abstract

The invention discloses a simple logging cable tension measurement and tension mutation alarm device, comprising a base partition, an outer shell and a tension display, wherein the partition is vertically fixed on the top surface of the middle part of the base, a front hinge that can be flipped back and forth is installed at the front end of the base, a tension wheel is rotatably installed on the top surface of the front hinge through a tension wheel shaft, one end of the tension wheel shaft is lengthened and a cable tension measurement device and a cable tension mutation alarm device are respectively connected on the shaft wall of the lengthened end, a DC power supply and a relay are installed at the lower part of the partition, a cover above the partition is fixed with an outer shell, an audible and visual alarm and a manual switch are installed on the top of the outer shell, and the tension display is externally arranged at a position convenient for operators to observe; the invention integrates measurement, alarm and control, has a compact structure, is low in cost, is easy to install and easy to repair and maintain, reduces the installation requirements for the wellhead pulley and the professional skill requirements for the operators, and is particularly suitable for the assembly of small logging winches.

Description

Technical Field

[0001] The invention specifically relates to the technical field of hydrological well logging, in particular to a simple well logging cable tension measurement and tension mutation alarm device. Background Art

[0002] During logging operations, cable tension data is an important basis for operators to analyze cable tension changes and correctly judge the operating status of instruments and cables in the well, which is crucial for normal construction and engineering accident handling. However, even if the logging equipment has cable tension data display, if the operator fails to observe the sudden change of cable tension in time and continues to lower or pull up the cable, it is easy to cause the cable to become knotted or broken. The cable tension sudden change alarm device can monitor the cable tension changes in real time, automatically judge the resistance (tension suddenly decreases) and jam (tension suddenly increases) and alarm or stop the machine, avoiding accidents caused by operator misoperation.

[0003] At present, the measurement of logging cable tension is to install the tension sensor on the top pulley or ground pulley at the wellhead or on the depth metering device. After the measured value is corrected and calculated by the coefficient, the real cable tension value can be obtained. On this basis, the alarm device is an alarm circuit designed for the phenomenon that the tension of downhole instruments or cables will suddenly change when encountering resistance or jamming in the wellbore, and is installed on the winch controller. However, this measurement and alarm method has strict requirements on the accuracy, strength, and measurement range of the tension sensor, and the cost of the sensor is relatively high. At the same time, the alarm circuit is complex and uses more electronic components, which increases the failure rate and maintenance difficulty when operating in harsh environments. In addition, the tension alarm value must be set accurately and the correction must be timely, and the logging personnel must have high professional skills. This measurement and alarm method is mainly used for larger logging winches, and small logging winches are not equipped. Summary of the invention

[0004] The purpose of the present invention is to provide a simple logging cable tension measurement and tension sudden change alarm device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A simple logging cable tension measurement and tension mutation alarm device comprises a base partition, a shell and a tension display, wherein the partition is vertically fixed on the top surface of the middle part of the base, a front hinge that can be flipped back and forth is installed at the front end of the base, a tension wheel is rotatably installed on the top surface of the front hinge through a tension wheel shaft, one end of the tension wheel shaft is lengthened and a cable tension measurement device and a cable tension mutation alarm device are respectively connected to the shaft wall of the lengthened end, a DC power supply and a relay are installed at the lower part of the partition, a shell is fixed to a cover above the partition, an audible and visual alarm and a manual switch are installed on the top of the shell, the tension display is at a position convenient for an operator to observe, the output end of the cable tension measurement device is electrically connected to the input end of the cable tension display on the winch controller, and the output end of the cable tension mutation alarm device is electrically connected to the power supply circuit of the logging winch motor.

[0007] The cable tension measuring device includes a large tension spring, a tension sensor, a tension regulator and a tension display. The front end of the large tension spring is installed on the shaft wall of the tension wheel shaft through the tension regulator, and the rear end of the large tension spring is fixedly connected to the force-bearing end face of the tension sensor. The tension sensor is installed on the left side wall of the partition through a wedge-shaped pad. The data output end of the tension sensor is electrically connected to the data input end of the cable tension display on the winch controller. The tension regulator includes a screw and a steel frame. The steel frame is inserted into the tension wheel shaft, and the head end of the screw is against the shaft wall of the tension wheel shaft. When the screw is turned, the steel frame moves in a direction perpendicular to the tension wheel shaft.

[0008] The cable tension mutation alarm device includes a slide rail fixed to the right side wall of the partition, a sliding card in the slide rail is provided with a slider, a ratchet bar is fixed to the outer wall of the slider, a pawl with a small tension spring is fixed to the partition, the pawl and the ratchet bar engage to limit the slider from moving toward the side away from the tension wheel shaft, a pin is fixed to the front end of the ratchet bar facing the tension wheel shaft, a pull rod is fixed to the shaft wall of the extended end of the tension wheel shaft, a pin groove is provided on the rear end panel of the pull rod along the sliding direction of the slider, the pin sliding card is arranged in the pin groove, and a pin is provided on the pull rod for The nail is pressed against the elastic device at the rear end of the pin groove, and a self-resetting switch for alarming when encountering obstruction is fixed on the ratchet bar. The triggering end of the self-resetting switch is arranged opposite to the rear end surface of the pull rod, and a collision screw is fixed on the outer panel of the ratchet bar on the rear side of the self-resetting switch through a bracket. A travel switch is installed at the front end of the right side panel of the partition, and the triggering end of the travel switch is arranged as a collision wheel. The collision wheel is located in the sliding track of the collision screw along the slide rail, and the normally open end of the travel switch is electrically connected to the sound and light alarm and the relay driving end that controls the opening and closing of the power supply of the logging winch motor.

[0009] As a further solution of the present invention: when the angle between the line connecting the tension wheel shaft and the front hinge shaft and the base is slightly greater than 90 degrees, the position of the tension wheel is set to position A, and when the front hinge is opened to 180 degrees, the position of the tension wheel is set to position B, the front end surface of the wedge-shaped pad is perpendicular to the line connecting the tension wheel shaft at position A and position B, and the center line of the slide rail along the direction is parallel to the line connecting the tension wheel shaft at position A and position B.

[0010] As a further solution of the present invention: the rear part of the base is connected to the top platform of the cable arranger through a rear hinge, and a pad is provided at the connection between the rear hinge and the top platform of the cable arranger to ensure that a certain gap is left between the base and the top platform of the cable arranger. The front part of the base is perforated and threaded with an angle adjustment screw, and the bottom of the angle adjustment screw rests on the panel of the top platform of the cable arranger to adjust the height of the tension wheel.

[0011] As a further solution of the present invention: the elastic device includes a cylinder shell, a top screw at the front of the cylinder shell, a gasket, a small spring and a top column in sequence behind the top screw. The cylinder shell is fixed on the pull rod panel, and the top column is pressed on the pin.

[0012] As a further solution of the present invention: a plug-in plate rack is fixed to the front middle part of the partition, and a plug-in plate with a slot is fixed to the plug-in plate rack by screws. A plug-in plate slot for mating with the plug-in plate is provided on the upper end surface of the pull rod. When the front hinge is opened to 180 degrees, the plug-in plate can just be inserted downward into the plug-in plate slot and lock the tension wheel.

[0013] As a further solution of the present invention: a plug-in plate rack is fixed to the front middle part of the partition, and a plug-in plate with a slot is fixed to the plug-in plate rack by screws. A plug-in plate slot for mating with the plug-in plate is provided on the upper end surface of the pull rod. When the front hinge is opened to a certain degree, the plug-in plate can just be inserted downward into the plug-in plate slot and lock the tension wheel.

[0014] As a further solution of the present invention: a pawl limit pin for blocking the pawl and a tension wheel limit pin for blocking the bracket are fixed on the partition, the pawl limit pin is arranged on the rear side of the pawl, when the pawl is moved to the pawl limit pin, the pawl is separated from the ratchet bar, and the tension wheel limit pin is arranged on the rear side of the bracket, when the tension wheel is no longer affected by the cable tension, the slider moves backward, and the bracket is blocked by the tension wheel limit pin. At this time, the angle between the tension wheel axis of the tension wheel and the line connecting the front hinge axis and the base is slightly greater than 90 degrees.

[0015] As a further solution of the present invention: the DC power supply is connected in series with the manual switch, the sound and light alarm, and the self-resetting switch to form an obstruction alarm circuit; the normally closed end of the relay is connected in series with the external logging winch motor power supply circuit; the relay driving end is connected in series with the normally open end of the self-locking travel switch and then connected in parallel to the two ends of the self-resetting switch to form a jam alarm and winch parking circuit; the tension display power supply end is connected in series with the display switch and then connected in parallel to the two ends of the DC power supply; the tension sensor power supply end is also connected in parallel to the two ends of the DC power supply; the data output end of the tension sensor is electrically connected to the data input end of the tension display to form a cable tension measurement circuit and a tension display circuit.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has a built-in tension meter, which integrates measurement, alarm, and control. It has a compact structure and does not require technical support from other logging equipment. It can also form a system by itself. Although it does not measure the actual tension of the cable, it can display the relative size of the cable tension in real time, which provides an important basis for logging personnel to qualitatively analyze the changes in cable tension and correctly judge the operating status of the instrument and cable in the well. At the same time, it can alarm when the cable tension suddenly decreases (encounters resistance), and alarm and stop when the tension suddenly increases (encounters jamming), which provides a guarantee for the safe construction of logging operations. The device has stable operation, simple manufacture, low price, convenient installation, and easy maintenance. It reduces the installation requirements for the wellhead pulley and the business skills requirements of the operator, and is particularly suitable for the assembly of small logging winches. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the right view of a simple logging cable tension measurement and tension sudden change alarm device.

[0018] Figure 2 The figure is the main view of a simple logging cable tension measurement and tension sudden change alarm device.

[0019] Figure 3 It is a top view of a simple logging cable tension measurement and tension sudden change alarm device.

[0020] Figure 4 This is a circuit schematic diagram of a simple logging cable tension measurement and tension sudden change alarm device.

[0021] In the figure: 1-screw, 2-steel frame, 3-tension wheel shaft, 4-large tension spring, 5-tension sensor, 6-wedge pad, 7-slide rail, 8-slider, 9-cable arranger top platform, 10-pad, 11-rear hinge, 12-base, 13-DC power supply, 14-relay, 15-housing, 16-partition, 17-cylinder shell, 18-top screw, 19-gasket, 20-small spring, 21-top column, 22-pin groove, 23-pin, 24-self-reset switch, 25-ratchet bar, 2 6-tension wheel limit pin, 27-bracket, 28-collision screw, 29-ratchet, 30-manual switch, 31-sound and light alarm, 32-ratchet limit pin, 33-small tension spring, 34-travel switch, 35-collision wheel, 36-plug slot, 37-plug, 38-plug rack, 39-screw, 40-pull rod, 41-tension wheel, 42-front hinge, 43-angle adjustment screw, 44-logging winch motor, 45-display switch, 46-tension display, 47-guide wheel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figures 1 to 4 In an embodiment of the present invention, a simple logging cable tension measurement and tension mutation alarm device comprises a base 12, a partition 16, a shell 15 and a tension display 46, wherein the partition 16 is vertically fixed on the top surface of the middle part of the base 12, a front hinge 42 that flips forward and backward is installed at the front end of the base 12, a tension wheel 41 is rotatably installed on the top surface of the front hinge 42 through a tension wheel shaft 3, one end of the tension wheel shaft 3 is lengthened and a cable tension measurement device and a cable tension mutation alarm device are respectively connected to the shaft wall of the lengthened end, a DC power supply 13 and a relay 14 are installed at the lower part of the partition 16, a shell 15 is fixed to the cover above the partition 16, an audible and visual alarm 31 and a manual switch 30 are installed on the top of the shell 15, and the tension display 46 is at a position that is convenient for the operator to observe, for example, the tension display 46 is installed on the winch controller, the output end of the cable tension measurement device is electrically connected to the input end of the cable tension display 46 on the winch controller, and the output end of the cable tension mutation alarm device is electrically connected to the power supply circuit of the logging winch motor 44.

[0024] The cable tension measuring device includes a large tension spring 4, a tension sensor 5, a tension regulator and a tension display 46. The front end of the large tension spring 4 is installed on the shaft wall of the tension wheel shaft 3 through the tension regulator, and the rear end of the large tension spring 4 is fixedly connected to the force-bearing end face of the tension sensor 5. The tension sensor 5 is installed on the left side wall of the partition 16 through a wedge-shaped pad 6. The data output end of the tension sensor 5 is electrically connected to the data input end of the cable tension display 46 on the winch controller. The tension regulator includes a screw 1 and a steel frame 2. The steel frame 2 is inserted into the tension wheel shaft 3, and the head end of the screw 1 is against the shaft wall of the tension wheel shaft 3. When the screw 1 is turned, the steel frame 2 moves in a direction perpendicular to the tension wheel shaft 3.

[0025] The cable tension mutation alarm device includes a slide rail 7 fixed to the right side wall of the partition 16, a slider 8 is slidably provided in the slide rail 7, a ratchet bar 25 is fixed to the outer wall of the slider 8, a pawl 29 with a small tension spring 33 is fixed to the partition 16, the pawl 29 engages with the ratchet bar 25 to limit the slider 8 from moving toward the side away from the tension wheel shaft 3, a pin 23 is fixed to the front end of the ratchet bar 25 on the side facing the tension wheel shaft 3, a pull rod 40 is fixed to the shaft wall of the extended end of the tension wheel shaft 3, a pin groove 22 is provided on the rear end panel of the pull rod 40 along the sliding direction of the slider 8, the pin 23 is slidably provided in the pin groove 22, and a pin 23 is provided on the pull rod 40 for pulling the pin The nail 23 presses against the elastic device at the rear end of the pin groove 22, and a self-resetting switch 24 for alarming when encountering resistance is fixed on the ratchet bar 25. The triggering end of the self-resetting switch 24 is arranged opposite to the rear end surface of the pull rod 40, and a collision screw 28 is fixed to the outer panel of the ratchet bar 25 on the rear side of the self-resetting switch 24 through a bracket 27. A travel switch 34 is installed at the front end of the right side panel of the partition 16, and the triggering end of the travel switch 34 is arranged as a collision wheel 35. The collision wheel 35 is located in the sliding track of the collision screw 28 along the slide rail 7. The normally open end of the travel switch 34 is electrically connected to the sound and light alarm 31 and the relay drive end that controls the power on and off of the logging winch motor 44.

[0026] When the angle between the line connecting the tension wheel shaft 3 and the axis of the front hinge 42 and the base 12 is slightly greater than 90 degrees, the position of the tension wheel 41 is set to position A, and when the front hinge 42 is opened to 180 degrees, the position of the tension wheel 41 is set to position B, the front end surface of the wedge-shaped pad 6 is perpendicular to the line connecting the tension wheel shaft 3 at position A and position B, and the center line of the slide rail 7 along the direction is parallel to the line connecting the tension wheel shaft 3 at position A and position B.

[0027] The rear portion of the base 12 is connected to the top platform 9 of the cable arranger through a rear hinge 11. A pad 10 is provided at the connection between the rear hinge 11 and the top platform 9 of the cable arranger to ensure that a certain gap is left between the base 12 and the top platform 9 of the cable arranger. An angle adjustment screw 43 is threaded through a hole in the front portion of the base 12. The bottom of the angle adjustment screw 43 rests on the panel of the top platform 9 of the cable arranger to adjust the height of the tension wheel 41. The pad 10 and the angle adjustment screw 43 provided here are mainly used to adjust the angle between the base 12 and the top platform 9 of the cable arranger, that is, to adjust the height of the tension wheel 41.

[0028] The elastic device comprises a cylinder shell 17, a top screw 18 at the front of the cylinder shell 17, a gasket 19, a small spring 20 and a top column 21 behind the top screw 18. The cylinder shell 17 is fixed on the panel of the pull rod 40, and the top column 21 is pressed on the pin 23. The device is used to adjust the sensitivity of the alarm when encountering resistance. When the downhole instrument or cable encounters resistance, the cable tension suddenly decreases. Under the action of the large tension spring 4, the pull rod 40 moves backward. Before touching the self-reset switch 24 of the resistance alarm, it is necessary to overcome the force of the top column 21 on the pin 23. Tightening the top screw 18 increases the force and reduces the alarm sensitivity; loosening the top screw 18 reduces the force and increases the alarm sensitivity.

[0029] A plug-in plate rack 38 is fixed to the front middle part of the partition 16, and a slotted plug-in plate 37 is fixed to the plug-in plate rack 38 by screws 39. The upper end surface of the pull rod 40 is provided with a plug-in plate slot 36 for cooperating with the plug-in plate 37. When the front hinge 42 is opened to 180 degrees, the plug-in plate 37 can just be inserted downward into the plug-in plate slot 36 and lock the tension wheel 41.

[0030] A pawl limit pin 32 for blocking the pawl 29 and a tension wheel limit pin 26 for blocking the bracket 27 are fixed on the partition 16. The pawl limit pin 32 is arranged on the rear side of the pawl 29. When the pawl 29 is moved to the pawl limit pin 32, the pawl 29 is separated from the ratchet bar 25. The tension wheel limit pin 26 is arranged on the rear side of the bracket 27. When the tension wheel 41 is no longer affected by the cable tension, the slider 8 moves backward and the bracket 27 is blocked by the tension wheel limit pin 26. At this time, the angle between the tension wheel shaft 3 of the tension wheel 41 and the front hinge 42 shaft and the base 12 is slightly greater than 90 degrees.

[0031] The DC power supply 13 is connected in series with the manual switch 30, the sound and light alarm 31, and the self-resetting switch 24 to form an obstruction alarm circuit. The normally closed end of the relay 14 is connected in series with the power supply circuit of the external logging winch motor 44. The driving end of the relay 14 is connected in series with the normally open end of the self-locking travel switch 34 and then connected in parallel to the two ends of the self-resetting switch 24 to form a jam alarm and winch parking circuit. The power supply end of the tension display 46 is connected in series with the display switch 45 and then connected in parallel to the two ends of the DC power supply 13. The power supply end of the tension sensor 5 is also connected in parallel to the two ends of the DC power supply 13. The data output end of the tension sensor 5 is electrically connected to the data input end of the tension display 46 to form a cable tension measurement circuit and a tension display circuit.

[0032] The working principle of the present invention is:

[0033] Installation process: The cable tension measured by the present invention actually measures the force exerted by the cable on the tension wheel 41. When the cable tension increases, the force exerted by the cable on the tension wheel 41 increases, and vice versa. That is, what is measured is the relative value of the cable tension. Therefore, it is necessary to hold the tension wheel 41 of the present invention against the logging cable. The tension wheel 41 can be placed on the upper side of the cable or on the lower side of the cable, depending on the convenience of installation. In order to simplify the guidance of the tension wheel 41, the tension wheel 41 can be placed in front of the guide wheel 47 on the cable arranger or the metering wheel for depth measurement (when the base is installed on the cable arranger, if there is no available platform, a platform needs to be added). The following is an example of installing the present invention on the top platform 9 of the cable arranger and holding the tension wheel 41 against the lower side of the cable to illustrate:

[0034] Move the tension wheel 41 to position B, insert the plug plate 37 into the plug plate slot 36 on the upper end face of the pull rod 40 to lock the tension wheel 41, and then place the present invention on the top platform 9 of the cable arranger of the winch. Under the condition that the base 12 is parallel to the top platform 9 of the cable arranger, select a suitable cushion block 10 and place it between the rear hinge 11 and the top platform 9 of the cable arranger, so that the tension wheel 41 and the guide wheel 47 on the rear top platform 9 of the cable arranger are aligned left and right and high and low. After fixing the rear hinge 11, lift and fix the plug plate 37 to unlock the tension wheel 41. The tension display 46 is placed at a position that is easy for the operator to observe, such as on the winch controller, and the normally closed end of the relay 14 is connected in series to the power supply line of the logging winch motor 44 (if the motor power is large, an external contactor is required).

[0035] Debugging of the jam alarm function: The cable on the logging winch is led out through the guide wheel 47, the tension wheel 41 and the wellhead pulley, connected to the hanging scale placed at the wellhead and fixed, the winch is started to tighten the cable to 50% of the cable breaking force (it is also possible to suspend a weight of equal weight without hanging the scale), the winch is braked and stopped, and the tension is kept unchanged. At this time, the tension wheel 41 is moved to the B position, the plug plate 37 is inserted into the plug plate slot 36 on the upper end face of the pull rod 40 and the tension wheel 41 is locked, and the angle adjustment screw 43 at the front corner of the base 12 is turned to make the tension wheel 41 slightly higher (do not lower than, because when the guide wheel 47, the tension wheel 41 and the wellhead pulley form a straight line, as the cable tension increases, the force of the cable on the tension wheel 41 no longer increases. If the tension wheel 41 is lower than the straight line formed by the guide wheel 47 and the wellhead pulley, the jam alarm function fails.) The straight line formed by the guide wheel 47 and the wellhead pulley, lift and fix the plug plate 37, and unlock the tension wheel 41. Then turn the screw 1 on the tension regulator to adjust the tension of the large tension spring 4 so that the tension wheel 41 is just in position B (if the tension of the large tension spring 4 is adjusted to the maximum, the opening angle of the front hinge 42 is still greater than 180 degrees, it is necessary to replace the tension spring with a larger tension; if the tension of the large tension spring 4 is adjusted to the minimum, the opening angle of the front hinge 42 is still less than 180 degrees, it is necessary to replace the tension spring with a smaller tension), insert the plug plate 37 into the plug plate slot 36 on the upper end of the pull rod 40 to lock the tension wheel 41. Finally, adjust the collision screw 28 of the bracket 27 so that the collision wheel 35 of the self-locking travel switch 34 is just replaced, the normally open end of the travel switch is closed, and the alarm sounds. Lift and fix the plug plate 37, unlock the tension wheel 41, and the debugging is completed. After the debugging of the jam alarm function is completed, the screw 1 on the tension regulator will not be turned unless the cable breaking force is recalibrated.

[0036] Debugging of the obstruction alarm function: After the debugging of the jam alarm function is completed, the debugging of the obstruction alarm function is carried out. When setting the sensitivity of the obstruction alarm, it is necessary to comprehensively consider the influence of different weights and volumes of downhole instruments, different specific gravities of drilling fluids and lowering speeds on the alarm sensitivity to avoid no alarm or false alarm. In general, the operation is as follows: tighten the top screw 18 of the elastic device to the tightest, close the manual switch 30 on the top of the outer shell 15, and move the ratchet 29 to engage with the ratchet bar 25. After connecting the downhole instrument to the cable, place it at the wellhead through the guide wheel 47, the tension wheel 41, and the wellhead pulley and immerse it below the drilling fluid level, brake the winch, adjust the angle of the logging winch, and align the guide wheel 47 on the top platform of the cable arranger with the tension wheel 41 and the wellhead pulley. Move the tension wheel 41 to position B, insert the plug plate 37 into the plug plate slot 36 on the upper end face of the pull rod 40 and lock the tension wheel 41, turn the angle adjustment screw 43 at the front corner of the base 12 to make the tension wheel 41 slightly higher (never lower) than the straight line formed by the guide wheel 47 and the wellhead pulley, lift and fix the plug plate 37, and unlock the tension wheel 41. At this time, lift the downhole instrument so that its weight no longer acts on the cable, slowly loosen the top screw 18, and when the sound and light alarm 31 sounds, loosen it one more turn.

[0037] Operation process and working principle: Before logging, after the downhole instrument is put into the drilling fluid in the wellbore, the tension wheel 41 is moved to position B, the plug plate 37 is inserted into the plug plate slot 36 to lock the tension wheel 41, and the angle adjustment screw 43 at the front corner of the base 12 is turned to make the tension wheel 41 slightly higher (never lower than) the straight line formed by the guide wheel 47 and the wellhead pulley, and the plug plate 37 is lifted and fixed to unlock the tension wheel 41. Then close the display switch 45, close the manual switch 30 on the top of the housing 15, turn the ratchet 29 to engage with the ratchet bar 25, and reset the collision wheel 35 of the self-locking travel switch 34 to the position before the collision to start logging. When the cable is lowered, as the lowering depth increases, the weight of the underground cable continues to increase. Under the action of the cable tension, the tension wheel 41 rotates forward along the front hinge 42 axis as the center, and the distance from the tension wheel axis 3 to the front hinge 42 axis as the radius, and the arc formed by the forward rotation continuously moves forward, thereby driving the large tension spring 4 to continuously lengthen, the tension sensor 5 to continuously increase the force, and the tension display 46 to continuously increase the tension. At the same time, the pull rod 40 also pulls the ratchet bar 25 to continuously move forward along the slide rail 7 (forward gear). When the underground instrument or cable encounters resistance, the tension display 46 shows that the tension will suddenly decrease, and the tension wheel 41 moves back under the action of the large tension spring 4, driving the pull rod 40 to move backward. Because the ratchet bar 25 cannot move backward because the pawl 29 restricts it (reverse gear), the rear end of the pull rod 40 overcomes the force of the top column 21 on the pin 23 and touches the self-reset switch 24 on the ratchet bar 25, the alarm circuit is opened, and the sound and light alarm 31 sounds. When the resistance is removed, the tension indicator 46 shows that the tension increases, the tension wheel 41 drives the pull rod 40 forward, the self-reset switch 24 is reset, the sound and light alarm 31 is disconnected, and the sound stops. When the resistance is not removed and the alarm is stopped, the ratchet 29 can be moved to the ratchet limit pin 32 to separate it from the ratchet bar 25. The ratchet bar 25 moves backward under the top force of the top column 21 on the pin 23, so that the self-reset switch 24 is reset and the alarm stops. When the resistance is removed, the ratchet 29 is moved to engage with the ratchet bar 25; when the cable is lifted, the ratchet 29 is moved away from the ratchet bar 25 so that the ratchet bar 25 can move forward and backward with the pull rod 40, and the resistance alarm fails. As the cable is continuously lifted, the weight of the underground cable continues to decrease. Under the tension of the large tension spring 4, the tension wheel 41 drives the pull rod 40 and the ratchet bar 25 to move backward continuously, and the tension indicator 46 shows that the tension is continuously decreasing. When the downhole instrument or cable is stuck, the tension indicator 46 shows that the tension suddenly increases due to the sudden change in cable tension; at the same time, the tension wheel 41 drives the pull rod 40 and the ratchet bar 25 to move forward suddenly. When the front hinge 42 is opened nearly 180 degrees, the collision screw 28 on the bracket 27 collides with the collision wheel 35 and changes position, the normally open end of the self-locking travel switch 34 is closed, the alarm circuit is opened, and the sound and light alarm 31 sounds; at the same time, the drive circuit of the relay 14 is opened, the normally closed end of the relay 14 is disconnected, the logging winch motor 44 is powered off, and the winch stops.If the jam is not removed and the winch needs to be started, the manual switch 30 on the top of the housing 15 can be turned off, the relay 14 driving circuit loses power, the normally closed end of the relay 14 is closed, the logging winch motor 44 is powered, and the winch can be operated. When the jam is removed and the cable is continued to be pulled up, the manual switch 30 needs to be turned on, and the collision wheel 35 of the travel switch 34 is reset, so that when the jam occurs again, the jam alarm works normally.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A simple logging cable tension measurement and tension sudden change alarm device, characterized in that: The utility model comprises a base (12), a partition (16), a shell (15) and a tension display (46), wherein the partition (16) is vertically fixed on the top surface of the middle part of the base (12), a front hinge (42) that can be flipped forward and backward is installed at the front end of the base (12), a tension wheel (41) is rotatably installed on the top surface of the front hinge (42) through a tension wheel shaft (3), one end of the tension wheel shaft (3) is extended and a cable tension measuring device and a cable tension sudden change alarm device are respectively connected to the shaft wall of the extended end, a DC power supply (13) and a relay (14) are installed at the lower part of the partition (16), a shell (15) is fixed to the cover above the partition (16), an audible and visual alarm (31) and a manual switch (30) are installed on the top of the shell (15), the tension display (46) is at a position convenient for the operator to observe, the output end of the cable tension measuring device is electrically connected to the input end of the cable tension display (46) on the winch controller, and the output end of the cable tension sudden change alarm device is electrically connected to the power supply circuit of the logging winch motor (44); The cable tension measuring device comprises a large tension spring (4), a tension sensor (5), a tension regulator and a tension display (46); the front end of the large tension spring (4) is mounted on the shaft wall of the tension wheel shaft (3) through the tension regulator; the rear end of the large tension spring (4) is fixedly connected to the force-bearing end face of the tension sensor (5); the tension sensor (5) is mounted on the left side wall of the partition (16) through a wedge-shaped pad (6); the data output end of the tension sensor (5) is electrically connected to the data input end of the cable tension display (46) on the winch controller; the tension regulator comprises a screw rod (1) and a steel frame (2); the steel frame (2) is inserted into the tension wheel shaft (3); the head end of the screw rod (1) is pressed against the shaft wall of the tension wheel shaft (3); when the screw rod (1) is turned, the steel frame (2) moves in a direction perpendicular to the tension wheel shaft (3); The cable tension sudden change alarm device comprises a slide rail (7) fixed to the right side wall of the partition (16), a slider (8) is slidably mounted in the slide rail (7), a ratchet bar (25) is fixed to the outer side wall of the slider (8), a ratchet pawl (29) with a small tension spring (33) is fixed to the partition (16), the ratchet pawl (29) and the ratchet bar (25) are engaged with each other to limit the slider (8) from moving in a direction away from the tension wheel shaft (3), a pin (23) is fixed to the front end of the ratchet bar (25) on the side facing the tension wheel shaft (3), a pull rod (40) is fixed to the shaft wall of the extension end of the tension wheel shaft (3), a pin groove (22) is provided on the rear end panel of the pull rod (40) along the sliding direction of the slider (8), the pin (23) is slidably mounted in the pin groove (22), and a pull rod (40) is provided An elastic device for pushing the pin (23) against the rear end of the pin groove (22); a self-resetting switch (24) for alarming when encountering an obstruction is fixed on the ratchet bar (25); a trigger end of the self-resetting switch (24) is arranged opposite to the rear end surface of the pull rod (40); a collision screw (28) is fixed to the outer panel of the ratchet bar (25) on the rear side of the self-resetting switch (24) through a bracket (27); a travel switch (34) is installed at the front end of the right side panel of the partition (16); the trigger end of the travel switch (34) is arranged as a collision wheel (35); the collision wheel (35) is located in the sliding track of the collision screw (28) along the slide rail (7); the normally open end of the travel switch (34) is electrically connected to the sound and light alarm (31) and the relay drive end for controlling the opening and closing of the power supply of the logging winch motor (44); The rear part of the base (12) is connected to the top platform (9) of the cable arranger via a rear hinge (11); a cushion block (10) is provided at the connection between the rear hinge (11) and the top platform (9) of the cable arranger for ensuring a certain gap between the base (12) and the top platform (9) of the cable arranger; an angle adjustment screw rod (43) is threadedly inserted through a hole in the front part of the base (12); the bottom of the angle adjustment screw rod (43) abuts against a panel of the top platform (9) of the cable arranger for adjusting the height of the tension wheel (41).

2. The simple logging cable tension measurement and tension sudden change alarm device according to claim 1 is characterized in that: When the angle between the line connecting the tension wheel shaft (3) and the front hinge (42) axis and the base (12) is slightly greater than 90 degrees, the position of the tension wheel (41) is set to position A, and when the front hinge (42) is opened to 180 degrees, the position of the tension wheel (41) is set to position B, the front end surface of the wedge-shaped pad (6) is perpendicular to the line connecting the tension wheel shaft (3) at position A and position B, and the center line of the slide rail (7) along the direction is parallel to the line connecting the tension wheel shaft (3) at position A and position B.

3. The simple logging cable tension measurement and tension sudden change alarm device according to claim 1 is characterized in that: The elastic device comprises a cylinder shell (17), a top screw (18) at the front of the cylinder shell (17), a gasket (19) arranged behind the top screw (18), a small spring (20) and a top column (21); the cylinder shell (17) is fixed on a panel of the pull rod (40), and the top column (21) is pressed against a pin (23).

4. The simple logging cable tension measurement and tension sudden change alarm device according to claim 1 is characterized in that: A plug-in plate rack (38) is fixed to the front middle part of the partition (16), and a plug-in plate (37) with a slot is fixed to the plug-in plate rack (38) by means of screws (39). The upper end surface of the pull rod (40) is provided with a plug-in plate slot (36) for mating with the plug-in plate (37). When the front hinge (42) is opened to 180 degrees, the plug-in plate (37) can just be inserted downward into the plug-in plate slot (36) and lock the tension wheel (41).

5. The simple logging cable tension measurement and tension sudden change alarm device according to claim 1 is characterized in that: A ratchet stop pin (32) for blocking the ratchet (29) and a tension wheel stop pin (26) for blocking the bracket (27) are fixed on the partition (16). The ratchet stop pin (32) is arranged at the rear side of the ratchet (29). When the ratchet (29) is moved to the ratchet stop pin (32), the ratchet (29) is separated from the ratchet tooth bar (25). The tension wheel stop pin (26) is arranged at the rear side of the bracket (27). When the tension wheel (41) is no longer subjected to the cable tension, the slider (8) moves backwards and the bracket (27) is blocked by the tension wheel stop pin (26). At this time, the angle between the tension wheel shaft (3) of the tension wheel (41) and the front hinge (42) shaft and the base (12) is slightly greater than 90 degrees.

6. The simple logging cable tension measurement and tension sudden change alarm device according to any one of claims 1 to 5, characterized in that: The DC power supply (13) is connected in series with the manual switch (30), the sound and light alarm (31), and the self-resetting switch (24) to form an obstruction alarm circuit. The normally closed end of the relay (14) is connected in series with the power supply circuit of the external logging winch motor (44). The driving end of the relay (14) is connected in series with the normally open end of the self-locking travel switch (34) and then connected in parallel to the two ends of the self-resetting switch (24), forming an obstruction alarm and winch parking circuit. The power supply end of the tension display (46) is connected in series with the display switch (45) and then connected in parallel to the two ends of the DC power supply (13). The power supply end of the tension sensor (5) is also connected in parallel to the two ends of the DC power supply (13). The data output end of the tension sensor (5) is electrically connected to the data input end of the tension display (46), forming a cable tension measurement circuit and a tension display circuit.

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