Cable lowering length measuring device

Abstract

The utility model discloses a cable lowering length measuring device, which comprises a fixing frame, a measuring wheel rotatably connected to the fixing frame, an encoder mounted on the fixing frame, and a plurality of guide wheels, a clamping frame and a friction mechanism, the output end of the encoder is axially and fixedly connected with the measuring wheel, and the cable lowering length measuring device is characterized in that the cable lowering length measuring device also comprises a plurality of guide wheels, a plurality of clamping frames and a plurality of friction mechanisms, the plurality of guide wheels are rotatably connected in the fixing frame, the number of the clamping frames is two, the two clamping frames are arranged at the top end of the fixing frame through supporting mechanisms and used for supporting the clamping frames to fix a cable, and the two clamping frames are provided with friction mechanisms used for increasing friction force between the clamping frames and the cable. According to the cable length measuring device, the cable can be fixed when the surface of the cable is iced or more impurities such as oil stains are adhered, so that slipping between the cable and the measuring wheel is effectively prevented, and the cable length measuring accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable length measurement technology, specifically to a cable lowering length measuring device. Background Technology

[0002] During well logging operations, the depth of the well is mostly calculated by measuring the length of the cable lowered into the well. The cable length is calculated using a rotating measuring wheel on the logging winch. This wheel drives a rotary encoder, and the cable length is calculated based on the circumference of the measuring wheel and the pulse signals from the encoder. For example, if the circumference of the measuring wheel is 0.75 meters per revolution and the encoder generates 960 pulses per revolution, then 1 meter of cable would be calculated as 960 / 0.75 = 1280 pulses. Therefore, the system collects 1280 pulses and calculates the length as 1 meter.

[0003] However, due to the harsh environment during well logging operations, the water brought out of the oil well on the cable will freeze when the temperature is low in winter. Oil and other impurities on the cable will reduce the frictional resistance between the cable and the measuring wheel, causing relative displacement between the cable and the measuring wheel. This phenomenon is commonly known as cable slippage in well logging operations. When this happens, it will lead to inaccurate measurement of cable length and errors. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a cable length measuring device to solve the problem mentioned in the background art that cables are easily affected by impurities such as ice and oil, causing slippage between the cable and the measuring wheel, which can easily lead to inaccurate cable length measurement and errors.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a cable lowering length measuring device, including a fixed frame, a measuring wheel rotatably connected to the fixed frame, an encoder mounted on the fixed frame, the output end of the encoder being axially fixedly connected to the measuring wheel, and further including: a guide wheel, a clamping frame, and a friction mechanism. Multiple guide wheels are provided, all rotatably connected within the fixed frame. Two clamping frames are provided, each mounted on the top of the fixed frame via a support mechanism for supporting the clamping frame and fixing the cable. Both clamping frames are equipped with a friction mechanism to increase the friction between the clamping frame and the cable.

[0008] To support the clamping frame in clamping the cable, the support mechanism includes: a rotating seat, a connecting rod, and a spring-loaded assembly. There are two rotating seats, which are rotatably connected to the clamping frame and the fixed frame, respectively. The two ends of the connecting rod are rotatably connected to the two rotating seats, respectively. The spring-loaded assembly is located at the top of the fixed frame and is used to support the clamping frame.

[0009] To support the clamping frame, the spring-loaded assembly includes a spring-loaded frame and a support spring. The spring-loaded frame is fixedly connected to the top of the fixed frame, and the two ends of the support spring are fixedly connected to the spring-loaded frame and the clamping frame, respectively.

[0010] To increase the friction between the clamping frame and the cable, the friction mechanism includes a friction plate, a connecting plate, and a driving assembly. The clamping frame has multiple sliding grooves, and friction plates are slidably connected in each of the multiple sliding grooves. The connecting plate is fixedly connected to one end of the multiple friction plates. The driving assembly is located on one side of the clamping frame and is used to drive the multiple friction plates to move within the sliding grooves.

[0011] To drive multiple friction plates to move within the slide, the drive assembly includes a drive screw and a hexagonal block. One end of the drive screw is rotatably connected to one side of the clamping frame. A screw hole is provided on the connecting plate, and the drive screw is threaded into the screw hole. The hexagonal block is fixedly connected to the other end of the drive screw.

[0012] To accommodate the curvature of the cable, the other ends of the multiple friction plates are all arranged in an arc shape.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a cable lowering length measuring device, which has the following beneficial effects:

[0015] In this invention, the cooperation between the fixing frame, measuring wheel, encoder, guide wheel, clamping frame, support mechanism and friction mechanism can fix the cable when the cable surface is covered with ice or has a lot of oil and other impurities, effectively preventing slippage between the cable and the measuring wheel and improving the accuracy of cable length measurement. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0017] Figure 2 This is a three-dimensional structural diagram from another angle of this application;

[0018] Figure 3 This is a three-dimensional structural diagram of the friction mechanism of this application;

[0019] Figure 4 For this application Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1. Fixing frame; 2. Measuring wheel; 3. Encoder; 4. Guide wheel; 5. Clamping frame; 6. Rotating seat; 7. Connecting rod; 8. Rebound frame; 9. Support spring; 10. Friction plate; 11. Connecting plate; 12. Drive screw; 13. Hexagonal block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 A cable length measuring device includes a fixed frame 1, a measuring wheel 2 rotatably connected to the fixed frame 1, an encoder 3 mounted on the fixed frame 1, and an output end of the encoder 3 axially fixedly connected to the measuring wheel 2. It also includes guide wheels 4, clamping frames 5, and a friction mechanism. Multiple guide wheels 4 are rotatably connected within the fixed frame 1. Two clamping frames 5 are provided, each mounted on the top of the fixed frame 1 via a support mechanism to support and fix the cable. Both clamping frames 5 are equipped with a friction mechanism to increase the friction between the clamping frame 5 and the cable. Through the cooperation of the fixed frame 1, measuring wheel 2, encoder 3, guide wheels 4, clamping frames 5, support mechanism, and friction mechanism, the device can fix the cable even when its surface is covered with ice or has a lot of oil or other impurities, effectively preventing slippage between the cable and the measuring wheel 2 and improving the accuracy of cable length measurement.

[0023] The support mechanism includes: a rotating seat 6, a connecting rod 7, and a spring-loaded assembly. There are two rotating seats 6, which are rotatably connected to the clamping frame 5 and the fixed frame 1, respectively. The two ends of the connecting rod 7 are rotatably connected to the two rotating seats 6, respectively. The spring-loaded assembly is located at the top of the fixed frame 1 and is used to support the clamping frame 5. The spring-loaded assembly includes: a spring-loaded frame 8 and a support spring 9. The spring-loaded frame 8 is fixedly connected to the top of the fixed frame 1, and the two ends of the support spring 9 are fixedly connected to the spring-loaded frame 8 and the clamping frame 5, respectively. The clamping frame 5 is connected by the connecting rod 7 and supported by the support spring 9 on the spring-loaded frame 8, thereby clamping and fixing the cable with the clamping frame 5 to prevent the cable from slipping between the measuring wheel 2.

[0024] The friction mechanism includes: friction plates 10, connecting plates 11, and a drive assembly. The other ends of the multiple friction plates 10 are all arc-shaped. The clamping frame 5 has multiple sliding grooves, and the friction plates 10 are slidably connected in the multiple sliding grooves. The connecting plate 11 is fixedly connected to one end of the multiple friction plates 10. The drive assembly is located on one side of the clamping frame 5 and is used to drive the multiple friction plates 10 to move in the sliding grooves. The drive assembly includes: a drive screw 12 and a hexagonal block 13. One end of the drive screw 12 is rotatably connected to one side of the clamping frame 5. The connecting plate 11 has a screw hole, and the drive screw 12 is threaded into the screw hole. The hexagonal block 13 is fixedly connected to the other end of the drive screw 12. The operator rotates the hexagonal block 13 and the drive screw 12 to rotate. When the drive screw 12 rotates, it drives the connecting plate 11 and the multiple friction plates 10 to move in the sliding grooves, thereby adjusting the extension length of the friction plates 10 in the sliding grooves, and thus adjusting the friction force between the clamping frame 5 and the cable.

[0025] Working principle: When the cable is lowered, the cable lowering length measuring device guides the cable through the rotating guide wheel 4 inside the fixed frame 1. During this process, the measuring wheel 2 contacts the cable, and the cable length is calculated by the circumference of the measuring wheel 2 and the pulse signal of the encoder 3. When the cable has been used several times and the surface of the cable is covered with ice or has a lot of oil and other impurities, the clamping frame 5 is connected through the connecting rod 7, and the clamping frame 5 is supported by the support spring 9 set on the rebound frame 8, so that the clamping frame 5 clamps and fixes the cable, thereby preventing the cable from slipping between the cable and the measuring wheel 2. The operator rotates the hexagonal block 13 and the drive screw 12 to rotate. When the drive screw 12 rotates, it drives the connecting plate 11 and multiple friction plates 10 to move in the slide groove, thereby adjusting the extension length of the friction plates 10 in the slide groove, and thus adjusting the friction force between the clamping frame 5 and the cable.

[0026] It should also be added that the multiple friction plates 10 in contact with the cable can also scrape off impurities from the cable surface.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cable lowering length measuring device, comprising a fixed frame (1), a measuring wheel (2) rotatably connected to the fixed frame (1), an encoder (3) mounted on the fixed frame (1), the output end of the encoder (3) being axially fixedly connected to the measuring wheel (2), characterized in that, Also includes: Guide wheels (4), multiple guide wheels (4) are provided, and multiple guide wheels (4) are rotatably connected in the fixed frame (1); Clamping frame (5), two clamping frames (5) are provided, and both clamping frames (5) are set on the top of the fixed frame (1) through a support mechanism to support the clamping frame (5) to fix the cable; Friction mechanism: Both clamping frames (5) are provided with a friction mechanism to increase the friction between the clamping frame (5) and the cable.

2. The cable lowering length measuring device according to claim 1, characterized in that, The supporting structure includes: Rotating seat (6), two rotating seats (6) are provided, and the two rotating seats (6) are respectively rotatably connected to the clamping frame (5) and the fixing frame (1); A connecting rod (7) is provided, with its two ends rotatably connected to the two rotating seats (6) respectively. A spring-back assembly is disposed at the top of the fixed frame (1) and is used to support the clamping frame (5).

3. The cable lowering length measuring device according to claim 2, characterized in that, The rebound assembly includes: A return frame (8) is fixedly connected to the top of the fixed frame (1); A support spring (9) is fixedly connected at both ends to the spring return frame (8) and the clamping frame (5), respectively.

4. The cable lowering length measuring device according to claim 1, characterized in that, The friction mechanism includes: The friction plate (10) is provided with multiple sliding grooves on the clamping frame (5), and the friction plate (10) is slidably connected in each of the multiple sliding grooves; A connecting plate (11) is fixedly connected to one end of one of the plurality of friction plates (10); A drive assembly is disposed on one side of the clamping frame (5) for driving the plurality of friction plates (10) to move within the groove.

5. The cable lowering length measuring device according to claim 4, characterized in that, The driving component includes: A drive screw (12) is provided, one end of which is rotatably connected to one side of the clamping frame (5). A screw hole is provided on the connecting plate (11), and the drive screw (12) is threaded into the screw hole. A hexagonal block (13) is fixedly connected to the other end of the drive screw (12).

6. The cable lowering length measuring device according to claim 4, characterized in that, The other end of each of the friction plates (10) is arc-shaped.

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