CN216669090U

CN216669090U - Simple logging cable tension measurement and tension sudden change alarm device

Info

Publication number: CN216669090U
Application number: CN202120773232.6U
Authority: CN
Inventors: 孙健; 李虎; 司振沄; 张海森; 张金广; 马增文; 魏士英; 贾金利; 李建华
Original assignee: Hengshui Institute Of Water Conservancy Scientific
Current assignee: Hengshui Institute Of Water Conservancy Scientific
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-06-03
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a simple logging cable tension measurement and tension sudden change alarm device, which comprises a base partition plate, a shell and a tension display, wherein the partition plate is vertically fixed on the top surface of the middle part of a base, a front hinge which is turned 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 sudden change alarm device are respectively connected to the shaft wall of the lengthened end; the utility model integrates measurement, alarm and control into a whole, has compact and small structure, low cost, convenient installation and easy maintenance, reduces the installation requirement on the wellhead pulley and the service skill requirement of an operator, and is particularly suitable for the assembly of a small-sized logging winch.

Description

Simple logging cable tension measurement and tension sudden change alarm device

Technical Field

The utility model particularly relates to the technical field of hydrographic logging, and particularly relates to a simple logging cable tension measurement and tension sudden change alarm device.

Background

In the logging operation, the tension data of the cable is an important basis for operators to analyze the tension change of the cable and correctly judge the running state of instruments and the cable in the underground, and is important for normal construction and engineering accident handling. However, even if the logging equipment has cable tension data display, if an operator cannot observe sudden change of cable tension in time and continues to put down or lift up the cable, accidents of cable knotting or cable breaking are easily caused. Cable tension sudden change alarm device can real time monitoring cable tension change, and automatic judgement meets hinders (tension diminishes suddenly), meets the card (tension grow suddenly) and reports to the police or parks, avoids operating personnel maloperation and leads to the emergence of accident.

At present, the tension sensor is arranged on a wellhead top pulley or a ground pulley or a depth metering device for measuring the tension of a logging cable, and a real cable tension value can be obtained after the measured value is corrected and calculated by a coefficient. The alarm device is an alarm circuit designed aiming at the phenomenon that the tension of a downhole instrument or a cable is suddenly changed when the downhole instrument or the cable is blocked or stuck in a well hole on the basis, and is assembled on a winch controller. However, the measurement and alarm mode has strict requirements on the precision, strength, measurement range and the like of the tension sensor, and the cost of the sensor is high. Meanwhile, the alarm circuit is complex in circuit, more electronic components are adopted, and the failure rate and the maintenance difficulty during operation in severe environment are increased. In addition, the tension alarm value needs to be set accurately and corrected timely, and logging personnel need to have higher professional skills. The measuring and alarming mode is mainly used for a large logging winch, and a small logging winch is not assembled.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a simple logging cable tension measurement and tension sudden change alarm device to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

a simple logging cable tension measurement and tension sudden change alarm device comprises a base clapboard, a shell and a tension display, the baffle plate is vertically fixed on the top surface of the middle part of the base, the front end of the base is provided with a front hinge which is turned back and forth, the tension pulley is rotatably arranged on the top surface of the front hinge through a tension pulley shaft, one end of the tension pulley shaft is lengthened, and a cable tension measuring device and a cable tension sudden change alarm device are respectively connected on the shaft wall of the lengthened end, the direct current power supply and the relay are installed on the lower portion of the partition plate, a shell is fixed on a cover cap above the partition plate, an audible and visual alarm and a manual switch are installed on the top of the shell, the position of an operator of the tension display is convenient to observe, the output end of the cable tension measuring device is electrically connected with the input end of the cable tension display on the winch controller, and the output end of the cable tension sudden change alarm device is electrically connected with a power supply circuit of a logging winch motor.

The cable tension measuring device comprises a large tension spring, a tension sensor, a tension regulator and a tension display, wherein the front end of the large tension spring is installed on the shaft wall of a tension wheel shaft through the tension regulator, the rear end of the large tension spring is fixedly connected with the stressed end face of the tension sensor, the tension sensor is integrally installed on the left side wall of a partition plate through a wedge-shaped cushion block, the data output end of the tension sensor is electrically connected with the data input end of the cable tension display on a winch controller, the tension regulator comprises a screw rod and a steel frame, the steel frame is sleeved into the tension wheel shaft, the head end of the screw rod abuts against the shaft wall of the tension wheel shaft, and when the screw rod is screwed, the steel frame moves in the direction perpendicular to the tension wheel shaft.

The cable tension sudden change alarm device comprises a slide rail fixed on the right side wall of a partition board, a slide block is arranged in the slide rail in a sliding clamping mode, a ratchet bar is fixed on the outer side wall of the slide block, a pawl with a small tension spring is fixed on the partition board, the pawl and the ratchet bar are meshed to limit the slide block to move towards one side far away from the direction of a tension wheel shaft, a pin is fixed at the front end of one side of the ratchet bar, facing the tension wheel shaft, a pull rod is fixed on the shaft wall of the extending end of the tension wheel shaft, a pin groove is formed in the rear end panel of the pull rod along the sliding direction of the slide block, the pin is arranged in the pin groove in a sliding clamping mode, an elastic device used for enabling the pin to abut against the rear end of the pin groove is arranged on the pull rod, a self-reset switch for giving an alarm when the pin is blocked is fixed on the ratchet bar, the triggering end of the self-reset switch is arranged opposite to the rear end surface of the pull rod, and a collision screw rod is fixed on the outer side panel of the ratchet bar on the rear side of the self-reset switch through a support, the travel switch is installed at the front end of a panel on the right side of the partition plate, the trigger end of the travel switch is set to be a collision wheel, the collision wheel is located in a sliding track of the collision screw rod along the sliding rail, and the normally open end of the travel switch is electrically connected with the audible and visual alarm and a relay drive end for controlling the motor power supply of the logging winch to be opened and closed.

As a still further scheme of the utility model: when the included angle between the connecting line of the tension wheel shaft and the front hinge shaft and the base is approximately larger than 90 degrees, the position of the tension wheel is set as a position A, the position of the tension wheel when the front hinge is opened to 180 degrees is set as a position B, the front end surface of the wedge-shaped cushion block is perpendicular to the connecting line of the tension wheel shafts when the position A and the position B are opened, and the central line of the slide rail along the trend is parallel to the connecting line of the tension wheel shafts when the position A and the position B are opened.

As a still further scheme of the utility model: the rear portion of the base is connected with the cable arranging device top platform through a rear hinge, a cushion block used for guaranteeing that a certain gap is reserved between the base and the cable arranging device top platform is arranged at the joint of the rear hinge and the cable arranging device top platform, an angle adjusting screw rod is arranged in a penetrating mode in a punching thread in the front portion of the base, and the bottom of the angle adjusting screw rod abuts against a panel of the cable arranging device top platform and is used for adjusting the height of the tension wheel.

As a still further scheme of the utility model: the elastic device comprises a cylinder shell, a jackscrew at the front part of the cylinder shell, a gasket, a small spring and a jacking column in sequence behind the jackscrew, the cylinder shell is fixed on the pull rod panel, and the jacking column is jacked on the pin.

As a still further scheme of the utility model: middle part is fixed with the picture peg frame before the baffle, and the picture peg frame has the picture peg of trough of belt through the screw fixation, the picture peg groove that is used for pegging graft with the picture peg cooperation is offered to the pull rod up end, and when preceding hinge opened into 180 degrees, the picture peg just can insert the picture peg inslot downwards and pin the tension pulley.

As a still further scheme of the utility model: middle part is fixed with the picture peg frame before the baffle, and the picture peg frame has the picture peg of trough of belt through the screw fixation, the picture peg groove that is used for pegging graft with the picture peg cooperation is offered to the pull rod up end, and when preceding hinge opened the degree, the picture peg just can insert the picture peg inslot downwards and pin the tension pulley.

As a still further scheme of the utility model: the baffle is fixed with a pawl limit pin for blocking the pawl and a tension pulley limit pin for blocking the bracket, the pawl limit pin is arranged on the rear side of the pawl, when the pawl is pushed to the pawl limit pin, the pawl is separated from the ratchet bar, the tension pulley limit pin is arranged on the rear side of the bracket, when the tension pulley is not under the action of cable tension any more, the sliding block moves backwards, the bracket is blocked by the tension pulley limit pin, and at the moment, the included angle between the connecting line of the tension pulley shaft and the front hinge shaft of the tension pulley and the base is slightly larger than 90 degrees.

As a further scheme of the utility model: the direct current power supply is connected with the manual switch, the audible and visual alarm and the self-resetting switch in series to form a resistance-encountering alarm circuit, the normally closed end of the relay is connected with an external power supply circuit of a logging winch motor in series, the driving end of the relay is connected with the normally open end of the self-locking travel switch in series and then connected with the two ends of the self-resetting switch in parallel to form a circuit for giving an alarm when a car is encountered and stopping the winch, the power supply end of the tension display is connected with the display switch in series and then connected with the two ends of the direct current power supply in parallel, the power supply end of the tension sensor is also connected with the two ends of the direct current power supply in parallel, and the data output end of the tension sensor is electrically connected with the data input end of the tension display to form a cable tension measuring circuit and a tension display circuit.

Compared with the prior art, the utility model has the beneficial effects that: the tension meter is arranged in the tension meter, the tension meter integrates measurement, alarm and control, the structure is compact and small, technical support of other logging equipment is not needed, a system can be formed by itself, the relative size of the tension of the cable can be displayed in real time although the actual tension of the cable is not measured, and important basis is provided for logging personnel to qualitatively analyze the tension change of the cable and correctly judge the running state of an instrument and the cable in the underground. Meanwhile, the alarm can be given when the tension of the cable is suddenly reduced (meeting resistance), and the alarm and the stop can be given when the tension is suddenly increased (meeting blockage), so that the safety construction of the logging operation is guaranteed. The device has the advantages of stable work, simple manufacture, low price, convenient installation and easy maintenance, reduces the installation requirement on the wellhead pulley and the service skill requirement of an operator, and is particularly suitable for the assembly of a small-sized logging winch.

Drawings

Fig. 1 is a right side view of a simple logging cable tension measurement and tension jump alarm device.

Fig. 2 is a front view of a simple logging cable tension measurement and tension jump alarm device.

Fig. 3 is a top view of a simple logging cable tension measurement and tension jump alarm device.

Fig. 4 is a schematic circuit diagram of a simple logging cable tension measurement and tension sudden change alarm device.

In the figure: 1-screw, 2-steel frame, 3-tension wheel shaft, 4-large tension spring, 5-tension sensor, 6-wedge-shaped cushion block, 7-slide rail, 8-slide block, 9-cable arranger top platform, 10-cushion block, 11-rear hinge, 12-base, 13-DC power supply, 14-relay, 15-shell, 16-clapboard, 17-shell, 18-jackscrew, 19-gasket, 20-small spring, 21-jack, 22-pin groove, 23-pin, 24-self-reset switch, 25-ratchet bar, 26-tension wheel limit pin, 27-bracket, 28-collision screw, 29-pawl, 30-manual switch, 31-acousto-optic alarm, 32-pawl limit pin, 33-a small tension spring, 34-a travel switch, 35-a collision wheel, 36-a plugboard groove, 37-a plugboard, 38-a plugboard frame, 39-a screw, 40-a pull rod, 41-a tension wheel, 42-a front hinge, 43-an angle adjusting screw rod, 44-a logging winch motor, 45-a display switch, 46-a tension display and 47-a guide wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, in the embodiment of the present invention, a simple well logging cable tension measurement and tension jump alarm device includes a base 12, a partition 16, a housing 15, and a tension display 46, where the partition 16 is vertically fixed on the top surface of the middle portion of the base 12, a front hinge 42 that is turned back and forth is installed at the front end of the base 12, a tension pulley 41 is rotatably installed on the top surface of the front hinge 42 through a tension pulley shaft 3, one end of the tension pulley shaft 3 is lengthened and is connected to a cable tension measurement device and a cable tension jump alarm device on the shaft wall of the lengthened end, respectively, a dc power supply 13 and a relay 14 are installed at the lower portion of the partition 16, the housing 15 is fixed on the upper cover of the partition 16, an audible and visual alarm 31 and a manual switch 30 are installed at the top of the housing 15, the tension display 46 is installed at a position where an operator can observe conveniently, for example, the tension display 46 is installed on a winch controller, the output end of the cable tension measuring device is electrically connected with the input end of a cable tension display 46 on the winch controller, and the output end of the cable tension sudden change alarming device is electrically connected with a power supply circuit of a 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, wherein the front end of the large tension spring 4 is installed on the shaft wall of a tension wheel shaft 3 through the tension regulator, the rear end of the large tension spring 4 is fixedly connected with the stressed end face of the tension sensor 5, the tension sensor 5 is integrally installed on the left side wall of a partition plate 16 through a wedge-shaped cushion block 6, the data output end of the tension sensor 5 is electrically connected with the data input end of the cable tension display 46 on a winch controller, the tension regulator comprises a screw rod 1 and a steel frame 2, the steel frame 2 is sleeved into the tension wheel shaft 3, the head end of the screw rod 1 abuts against the shaft wall of the tension wheel shaft 3, and when the screw rod 1 is screwed, the steel frame 2 moves in the direction perpendicular to the tension wheel shaft 3.

The cable tension sudden change alarm device comprises a slide rail 7 fixed on the right side wall of a partition plate 16, a slide block 8 is arranged in the slide rail 7 in a sliding and clamping mode, a ratchet bar 25 is fixed on the outer side wall of the slide block 8, a pawl 29 with a small tension spring 33 is fixed on the partition plate 16, the pawl 29 is meshed with the ratchet bar 25 to limit the slide block 8 to move towards one side far away from the direction of a tension wheel shaft 3, a pin 23 is fixed at the front end of one side of the ratchet bar 25 towards the tension wheel shaft 3, a pull rod 40 is fixed on the shaft wall of the extending end of the tension wheel shaft 3, a pin groove 22 is formed in the rear end panel of the pull rod 40 along the sliding direction of the slide block 8, the pin 23 is arranged in the pin groove 22 in a sliding and clamping mode, an elastic device used for enabling the pin 23 to be abutted against the rear end of the pin groove 22 is arranged on the pull rod 40, a self-reset switch 24 for alarming when a resistance occurs is fixed on the ratchet bar 25, and the triggering end of the self-reset switch 24 is arranged opposite to the rear end face of the pull rod 40, a collision screw 28 is fixed on the panel outside the ratchet bar 25 at the rear side of the self-reset switch 24 through a bracket 27, a travel switch 34 is installed at the front end of the panel at the right side of the partition plate 16, the triggering end of the travel switch 34 is set as a collision wheel 35, the collision wheel 35 is positioned in the sliding track of the collision screw 28 along the sliding rail 7, and the normally open end of the travel switch 34 is electrically connected with the audible and visual alarm 31 and the relay driving end for controlling the power supply of the logging winch motor 44 to be switched on and off.

When the included angle between the connecting line of the tension wheel shaft 3 and the front hinge 42 shaft and the base 12 is slightly larger than 90 degrees, the position of the tension wheel 41 is set as a position A, the position of the tension wheel 41 when the front hinge 42 is opened to 180 degrees is set as a position B, the front end surface of the wedge-shaped cushion block 6 is perpendicular to the connecting line of the tension wheel shaft 3 when the position A and the position B are opened, and the central line of the slide rail 7 along the trend is parallel to the connecting line of the tension wheel shaft 3 when the position A and the position B are opened.

The rear portion of base 12 is connected with row's cable ware top platform 9 through back hinge 11, the junction of back hinge 11 and row's cable ware top platform 9 is equipped with and is used for guaranteeing to leave certain clearance cushion 10 between base 12 and the row's cable ware top platform 9, the anterior screw thread that punches of base 12 wears to be equipped with angle adjusting screw 43, angle adjusting screw 43 bottom supports and is used for adjusting the height of tension pulley 41 on row's cable ware top platform 9's panel, the cushion 10 that sets up here and angle adjusting screw 43 mainly used adjust the angle of base 12 and row's cable ware top platform 9, just also be the height of adjusting tension pulley 41.

The elastic device comprises a cylinder shell 17, a jackscrew 18 at the front part of the cylinder shell 17, a gasket 19, a small spring 20 and a jacking column 21 which are sequentially arranged behind the jackscrew 18, wherein the cylinder shell 17 is fixed on a panel of a pull rod 40, the jacking column 21 is jacked on a pin 23, the device is used for adjusting the sensitivity of alarm when meeting resistance, when a downhole instrument or a cable meets resistance, the tension of the cable is suddenly reduced, the pull rod 40 moves backwards under the action of a large tension spring 4, and before a self-resetting switch 24 for alarm when meeting resistance is touched, the acting force of the jacking column 21 on the pin 23 needs to be overcome. The jackscrew 18 is screwed down, the acting force is increased, and the alarm sensitivity is reduced; the jackscrew 18 is unscrewed, the acting force is reduced, and the alarm sensitivity is increased.

The middle part is fixed with picture peg frame 38 in the front of baffle 16, and picture peg frame 38 is fixed with slotted picture peg 37 through screw 39, the picture peg groove 36 that is used for cooperating the grafting with picture peg 37 is seted up to pull rod 40 upper end, and when preceding hinge 42 opened into 180 degrees, picture peg 37 just can insert downwards in picture peg groove 36 and pin tension pulley 41.

The partition plate 16 is fixed with a pawl limit pin 32 for blocking the pawl 29 and a tension pulley limit pin 26 for blocking the bracket 27, the pawl limit pin 32 is arranged at the rear side of the pawl 29, when the pawl 29 is shifted to the pawl limit pin 32, the pawl 29 is separated from the ratchet bar 25, the tension pulley limit pin 26 is arranged at the rear side of the bracket 27, when the tension pulley 41 is not under the action of cable tension any more, the sliding block 8 moves backwards, the bracket 27 is blocked by the tension pulley limit pin 26, and at this time, the included angle between the connecting line of the tension pulley shaft 3 of the tension pulley 41 and the front hinge 42 shaft and the base 12 is slightly larger than 90 degrees.

The direct current power supply 13 is connected in series with the manual switch 30, the audible and visual alarm 31 and the self-resetting switch 24 to form a resistance-encountering alarm circuit, the normally closed end of the relay 14 is connected in series with a power supply circuit of an 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 with the two ends of the self-resetting switch 24 to form a circuit for giving an alarm when a card is encountered and stopping the winch, the power supply end of the tension display 46 is connected in series with the display switch 45 and then connected in parallel with the two ends of the direct current power supply 13, the power supply end of the tension sensor 5 is also connected in parallel with the two ends of the direct current power supply 13, and the data output end of the tension sensor 5 is electrically connected with the data input end of the tension display 46 to form a cable tension measuring circuit and a tension display circuit.

The working principle of the utility model is as follows:

the installation process comprises the following steps: the cable tension measured by the present invention actually measures the force of the cable acting on the tension pulley 41. When the cable tension is increased, the force of the cable on the tension pulley 41 is increased, and conversely, the force is decreased. I.e. the relative value of the magnitude of the cable tension is measured. Therefore, the tension pulley 41 of the present invention needs to be pressed against the logging cable, and the tension pulley 41 can be pressed against the upper side of the cable or the lower side of the cable, depending on the convenience of installation. To simplify the guiding of the tension pulley 41, the tension pulley 41 can be placed in front of a guide pulley 47 on the cable arranger or a gauge wheel for depth measurement (when the base is mounted on the cable arranger, if no platform is available, a platform needs to be added). The utility model will be described below for an embodiment in which the utility model is mounted on the top platform 9 of the cable arranger and the tension pulley 41 is held against the underside of the cable:

moving the tension pulley 41 to a position B, inserting the inserting plate 37 into the inserting plate groove 36 on the upper end surface of the pull rod 40 to lock the tension pulley 41, then placing the winch cable arranging device on the cable arranging device top platform 9 of the winch, selecting a proper cushion block 10 to be placed between the rear hinge 11 and the cable arranging device top platform 9 under the condition that the base 12 is parallel to the cable arranging device top platform 9, enabling the tension pulley 41 to be aligned with the guide pulley 47 on the rear cable arranging device top platform 9 in the left-right and high-low directions, lifting and fixing the inserting plate 37 after fixing the rear hinge 11, and unlocking the tension pulley 41. The tension indicator 46 is located at a position convenient for an operator to observe, such as a winch controller, and the normally closed end of the relay 14 is connected in series with a power supply line of the logging winch motor 44 (if the motor power is large, a contactor needs to be added).

Debugging the card 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 with a hanging balance arranged at a wellhead and fixed, the winch is started to tension the cable to reach 50% of the cable breaking force (or a heavy object with the same weight can be suspended without the hanging balance), the winch is braked and stopped, and the tension force is kept unchanged. At this time, the tension pulley 41 is moved to the position B, the inserting plate 37 is inserted into the inserting plate groove 36 on the upper end face of the pull rod 40 and locks the tension pulley 41, the angle adjusting screw 43 at one corner of the front part of the base 12 is screwed, so that the tension pulley 41 is slightly higher (almost lower, because after the guide pulley 47, the tension pulley 41 and the wellhead pulley form a straight line, along with the increase of the tension of the cable, the acting force of the cable on the tension pulley 41 is not increased any more, if the tension pulley 41 is lower than the straight line formed by the guide pulley 47 and the wellhead pulley, the clamping alarm function fails), the straight line formed by the guide pulley 47 and the wellhead pulley lifts and fixes the inserting plate 37, and the tension pulley 41 is unlocked. Then, a screw rod 1 on the tension adjuster is screwed to adjust the tension of the large tension spring 4, so that the tension wheel 41 is just located at a position B (if the tension of the large tension spring 4 is adjusted to be maximum, the opening angle of the front hinge 42 is still larger than 180 degrees, the tension spring with larger tension needs to be replaced, and if the tension of the large tension spring 4 is adjusted to be minimum, the opening angle of the front hinge 42 is still smaller than 180 degrees, the tension spring with smaller tension needs to be replaced), and the inserting plate 37 is downwards inserted into the inserting plate groove 36 on the upper end face of the pull rod 40 to lock the tension wheel 41. Finally, the collision screw 28 of the bracket 27 is adjusted, so that the collision wheel 35 of the travel switch 34 capable of self-locking is just switched, the normally open end of the travel switch is closed, and the alarm rings. And lifting and fixing the inserting plate 37, unlocking the tension pulley 41 and completing debugging. After the alarm function is debugged when the cable is blocked, the screw rod 1 on the tension regulator is not screwed unless the breaking force of the cable is calibrated again.

Debugging the alarm function when meeting the block: and after the debugging of the card encountering alarm function is finished, debugging of the card encountering alarm function is carried out. When the alarm sensitivity is set, the influence of different weights and volumes of downhole instruments, different specific gravities of drilling fluid and lowering speed on the alarm sensitivity needs to be comprehensively considered, and the occurrence of no alarm or false alarm is avoided. The general case operates as follows: the top thread 18 of the resilient means is screwed down to close the manual switch 30 at the top of the housing 15 and the toggle pawl 29 engages the ratchet bar 25. After the underground instrument is connected with the cable, the underground instrument is placed to a wellhead through the guide wheel 47, the tension wheel 41 and the wellhead pulley and is immersed under the drilling liquid level, the winch is braked, the angle of the logging winch is adjusted, and the guide wheel 47 on the top platform of the cable arranger is aligned with the tension wheel 41 and the wellhead pulley left and right. Moving the tension pulley 41 to the position B, inserting the flashboard 37 into the flashboard groove 36 on the upper end surface of the pull rod 40 downwards, locking the tension pulley 41, screwing an angle adjusting screw 43 at one corner of the front part of the base 12, enabling the tension pulley 41 to be slightly higher (not lower) than a straight line formed by a guide pulley 47 and a wellhead pulley, lifting and fixing the flashboard 37, and unlocking the tension pulley 41. At the moment, the underground instrument is lifted to enable the weight of the underground instrument not to act on the cable any more, the jackscrew 18 is unscrewed slowly, and after the audible and visual alarm 31 gives an alarm, the underground instrument is unscrewed for one circle.

The operation process and the working principle are as follows: before logging, after a downhole instrument is placed in a well drilling fluid, the tension pulley 41 is moved to a position B, the inserting plate 37 is inserted into the inserting plate groove 36 to lock the tension pulley 41, an angle adjusting screw 43 at one corner in the front of the base 12 is screwed to enable the tension pulley 41 to be slightly higher (not lower) than a straight line formed by the guide pulley 47 and a wellhead pulley, the inserting plate 37 is lifted and fixed, and the tension pulley 41 is unlocked. Then the display switch 45 is closed, the manual switch 30 on the top of the shell 15 is closed, the pawl 29 is shifted to be meshed with the ratchet bar 25, and the collision wheel 35 of the self-locking travel switch 34 is reset to a non-collision position, so that logging can be started. When the cable is transferred, along with the increase of the transfer depth, the weight of the underground cable is continuously increased, under the action of the tension of the cable, the tension wheel 41 is centered along the front hinge 42 shaft, the distance from the tension wheel shaft 3 to the front hinge 42 shaft is a radius, and the arc formed by forward rotation continuously moves forwards, so that the large tension spring 4 is driven to be continuously elongated, the stress of the tension sensor 5 is continuously increased, the tension display 46 displays that the tension is continuously increased, and meanwhile, the pull rod 40 also pulls the ratchet bar 25 to continuously move forwards (along the teeth) along the slide rail 7. When the underground instrument or the cable is blocked, the tension display 46 displays that the tension is suddenly reduced, the tension wheel 41 moves back under the action of the large tension spring 4 to drive the pull rod 40 to move back, the pawl 29 limits the ratchet bar 25 not to move back (reverse tooth), the rear end of the pull rod 40 overcomes the acting force of the ejection column 21 on the pin 23 and then touches the self-reset switch 24 on the ratchet bar 25, the alarm circuit is switched on, and the audible and visual alarm 31 rings. When the resistance is removed, the tension display 46 displays that the tension is increased, the tension wheel 41 drives the pull rod 40 to move forwards, the self-reset switch 24 is reset, the audible and visual alarm 31 is turned off, and the sound is stopped. When the alarm is not to be stopped when the resistance is relieved, the pawl 29 can be shifted to the pawl limiting pin 32 to be separated from the ratchet bar 25, the ratchet bar 25 moves backwards under the jacking force of the jacking column 21 on the pin 23, the switch of the self-reset switch 24 is reset, the alarm is stopped, and after the resistance is relieved, the pawl 29 is shifted to be meshed with the ratchet bar 25; when the cable is lifted up, the pawl 29 is pulled to be separated from the ratchet bar 25, so that the ratchet bar 25 can move back and forth along with the pull rod 40, and the alarm is disabled when being blocked. With the continuous lifting of the cable, the weight of the underground cable is continuously reduced, and under the action of the tension of the large tension spring 4, the tension wheel 41 drives the pull rod 40 and the ratchet bar 25 to continuously move backwards, and the tension display 46 displays that the tension is continuously reduced. When the downhole instrument or cable encounters a jam, the tension display 46 shows that the tension suddenly increases under the action of the sudden cable tension; meanwhile, the tension wheel 41 drives the pull rod 40 and the ratchet bar 25 to suddenly move forward, when the front hinge 42 is opened to nearly 180 degrees, the collision screw 28 on the bracket 27 collides with the collision wheel 35 to change positions, the normally open end of the self-locking travel switch 34 is closed, the alarm circuit is switched on, and the audible and visual alarm 31 rings; at the same time, the relay 14 drive circuit is on, the normally closed end of the relay 14 is off, the logging winch motor 44 is de-energized, and the winch is stopped. If the clamp is not released, when the winch needs to be started, the manual switch 30 on the top of the shell 15 can be closed, the relay 14 driving circuit is powered off, the normally closed end of the relay 14 is closed, the logging winch motor 44 supplies power, and the winch can operate. When the cable is lifted continuously when the card is not touched, the manual switch 30 needs to be switched on, and then the collision wheel 35 of the travel switch 34 needs to be reset, so that the card-touching alarm works normally when the card is touched again.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A simple logging cable tension measurement and tension sudden change alarm device is characterized by comprising a base (12), a partition plate (16), a shell (15) and a tension display (46), wherein the partition plate (16) is vertically fixed on the top surface of the middle of the base (12), a front hinge (42) which is turned over front and back 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 is respectively connected with a cable tension measurement device and a cable tension sudden change alarm device on the shaft wall of the lengthened end, a direct current power supply (13) and a relay (14) are installed at the lower part of the partition plate (16), the shell (15) is fixedly covered above the partition plate (16), an audible and visual alarm (31) and a manual switch (30) are installed at the top of the shell (15), and an operator of the tension display (46) can observe conveniently, the output end of the cable tension measuring device is electrically connected with the input end of a cable tension display (46) on the winch controller, and the output end of the cable tension sudden change alarm device is electrically connected with a power supply circuit of a logging winch motor (44).

2. The simple well logging cable tension measurement and tension sudden change alarm device according to claim 1, wherein the cable tension measurement 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 installed 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 with the stressed end face of the tension sensor (5), the tension sensor (5) is integrally installed on the left side wall of the partition plate (16) through a wedge-shaped cushion block (6), the data output end of the tension sensor (5) is electrically connected with 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 sleeved into the tension wheel shaft (3), the head end of the screw rod (1) abuts against the shaft wall of the tension wheel shaft (3), when the screw rod (1) is screwed, the steel frame (2) moves along the direction vertical to the tension wheel shaft (3).

3. The simple logging cable tension measuring and tension sudden change alarming device according to claim 2, wherein the cable tension sudden change alarming device comprises a sliding rail (7) fixed on the right side wall of a partition plate (16), a sliding block (8) is arranged in the sliding rail (7) in a sliding clamping manner, a ratchet bar (25) is fixed on the outer side wall of the sliding block (8), a pawl (29) with a small tension spring (33) is fixed on the partition plate (16), the pawl (29) is meshed with the ratchet bar (25) to limit the sliding block (8) to move towards one side far away from the tension wheel shaft (3), a pin (23) is fixed at the front end of one side of the ratchet bar (25) towards the tension wheel shaft (3), a pull rod (40) is fixed on the shaft wall of the extending end of the tension wheel shaft (3), a pin groove (22) begins to be formed in the sliding direction of the sliding block (8) on the rear end plate of the pull rod (40), and the pin (23) is arranged in the pin groove (22) in a sliding manner, the elastic device is arranged on the pull rod (40) and used for pushing the pin (23) against the rear end of the pin groove (22), a self-reset switch (24) giving an alarm when being blocked is fixed on the ratchet rack (25), the trigger end of the self-reset switch (24) is opposite to the rear end face of the pull rod (40), a collision screw rod (28) is fixed on the outer side panel of the ratchet rack (25) on the rear side of the self-reset switch (24) through a support (27), a travel switch (34) is installed at the front end of the panel on the right side of the partition plate (16), the trigger end of the travel switch (34) is set to be a collision wheel (35), the collision wheel (35) is located in the sliding track of the collision screw rod (28) along the sliding rail (7), and the normally open end of the travel switch (34) is electrically connected with the audible and visual alarm (31) and the drive end of a relay for controlling the power supply of the logging winch motor (44).

4. The simple well logging cable tension measurement and tension sudden change alarm device according to claim 3, wherein when an included angle between a connecting line of the tension wheel shaft (3) and a front hinge (42) shaft and the base (12) is approximately larger than 90 degrees, the position of the tension wheel (41) is set as a position A, the position of the tension wheel (41) is set as a position B when the front hinge (42) is opened to 180 degrees, the front end surface of the wedge-shaped cushion block (6) is perpendicular to the connecting line of the tension wheel shaft (3) when the position A and the position B are formed, and a central line of the slide rail (7) along the trend is parallel to the connecting line of the tension wheel shaft (3) when the position A and the position B are formed.

5. The simple logging cable tension measuring and tension sudden change alarming device as claimed in claim 1, wherein the rear portion of the base (12) is connected with the cable arranging device top platform (9) through a rear hinge (11), a cushion block (10) used for ensuring a certain gap is reserved between the base (12) and the cable arranging device top platform (9) is arranged at the joint of the rear hinge (11) and the cable arranging device top platform (9), an angle adjusting screw rod (43) is arranged in a hole-punching thread in the front portion of the base (12) in a penetrating mode, and the bottom of the angle adjusting screw rod (43) abuts against a panel of the cable arranging device top platform (9) and is used for adjusting the height of the tension wheel (41).

6. The simple logging cable tension measuring and tension sudden change alarming device as claimed in claim 3, wherein the elastic device comprises a cylinder shell (17), a jackscrew (18) at the front part of the cylinder shell (17), a gasket (19) sequentially arranged behind the jackscrew (18), a small spring (20) and a jack post (21), the cylinder shell (17) is fixed on a panel of the pull rod (40), and the jack post (21) is propped against a pin (23).

7. The simple logging cable tension measuring and tension sudden change alarming device as claimed in claim 3, wherein a plugboard frame (38) is fixed to the middle of the front of the partition board (16), a plugboard (37) with a groove is fixed to the plugboard frame (38) through a screw (39), a plugboard groove (36) used for being matched and plugged with the plugboard (37) is formed in the upper end face of the pull rod (40), and when the front hinge (42) is opened to 180 degrees, the plugboard (37) can be just downwards inserted into the plugboard groove (36) and locks the tension wheel (41).

8. The simple logging cable tension measuring and tension sudden change alarming device according to claim 3, wherein a pawl limit pin (32) for blocking a pawl (29) and a tension pulley limit pin (26) for blocking a bracket (27) are fixed on the partition plate (16), the pawl limit pin (32) is arranged on the rear side of the pawl (29), when the pawl (29) is shifted to the pawl limit pin (32), the pawl (29) is separated from the ratchet rack (25), the tension pulley limit pin (26) is arranged on the rear side of the bracket (27), when the tension pulley (41) is not under the action of cable tension any more, the sliding block (8) moves backwards, the bracket (27) is blocked by the tension pulley limit pin (26), and at the moment, the included angle between the connecting line of the tension pulley shaft (3) of the tension pulley (41) and the front hinge (42) and the base (12) is slightly larger than 90 degrees.

9. The simple well logging cable tension measuring and tension sudden change alarming device as recited in any one of claims 1-7, wherein the DC power supply (13) is connected in series with the manual switch (30), the audible and visual alarm (31) and the self-reset switch (24) to form a circuit for alarming when encountering a resistance, the normally closed end of the relay (14) is connected in series with the power supply circuit of the external well logging winch motor (44), the driving end of the relay (14) is connected in series with the self-lockable travel switch (34) and then connected in parallel with the two ends of the self-reset switch (24) to form a circuit for alarming when encountering a card and stopping the winch, the power supply end of the tension display (46) is connected in series with the display switch (45) and then connected in parallel with the two ends of the DC power supply (13), the power supply end of the tension sensor (5) is also connected in parallel with the two ends of the DC power supply (13), and the data output end of the tension sensor (5) is electrically connected with the data input end of the tension display (46), and a cable tension measuring circuit and a tension display circuit are formed.