Durability test device and durability test method for crawling mechanism of cable logging tractor

Abstract

The present invention discloses a durability test device and method for the crawling mechanism of a cable logging tractor, addressing the bulky size, high manufacturing cost, and difficult testing issues of existing equipment. The device comprises a main testing device and an auxiliary support device. The main testing device includes an I-shaped load turntable, a bracket connected to the central axis of the I-shaped load turntable, and casing wall simulation disks corresponding to the upper and lower inner surfaces of the I-shaped load turntable. The present invention has a simple structure, a small size, is easy to install and maintain, and is convenient to operate. It can more realistically simulate actual operating conditions and objectively and scientifically evaluate the service life of the tractor's mechanical structure and components.

Description

Technical Field

[0001] The invention relates to the field of petroleum engineering equipment manufacturing, and in particular to a durability test device and a durability test method for a crawling mechanism of a cable logging tractor. Background Art

[0002] As the application scale of cable logging tractors expands, competition among tractor manufacturers is becoming increasingly fierce. The competitiveness of companies is ultimately reflected in product quality and technical level. Cable logging tractors are mechatronic petroleum engineering logging equipment. The service life of their mechanical structure and components is an important indicator for evaluating product quality and technical level. At present, domestic manufacturers evaluate the service life of the mechanical structure and components of tractors based on feedback from customers after use. This feedback information is unreliable and has a long cycle, which affects the progress of new product research and development. Since the crawling mechanism of the cable logging tractor (referred to as the tractor) is a linear reciprocating motion in the actual casing, if it is made to simulate a linear reciprocating motion with a load and record the distance, the device will be bulky, and the manufacturing cost and experimental difficulty will also increase accordingly. Summary of the Invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a cable logging tractor crawling mechanism durability test device with simple structure, small size, easy installation and maintenance, convenient operation, the ability to more realistically simulate actual working conditions, and objectively and scientifically evaluate the mechanical structure of the tractor and the service life of its components.

[0004] The present invention also provides a durability test method for a cable logging tractor crawling mechanism using the test device.

[0005] The technical solution includes a main testing device and an auxiliary supporting device. The main testing device includes an I-shaped load turntable, a bracket connected to the central axis of the I-shaped load turntable, and casing wall simulation disks corresponding to the upper and lower inner surfaces of the I-shaped load turntable.

[0006] The auxiliary supporting device consists of a fixing pipe and a supporting frame connected to the fixing pipe.

[0007] The joint portion between the working surface of the casing wall simulation disk and the driving wheel of the cable logging tractor is an arc surface.

[0008] The I-shaped load turntable is externally connected to a brake.

[0009] The casing wall simulation disk is connected to the inner surface of the I-shaped load turntable by clamping or bolting.

[0010] The working surface of the casing wall simulation disk is provided with at least one of a convex shape, a through hole or a notch.

[0011] The durability test method of the crawling mechanism of the cable logging tractor of the present invention comprises the following steps:

[0012] 1. Connect the two ends of the cable logging tractor to the centralizer respectively;

[0013] 2. Then, the cable logging tractor is placed in the test device according to any one of claims 1 to 6, and the centralizers at both ends are respectively placed in the fixed tubes of the auxiliary support devices on both sides;

[0014] 3. Rotate the wireline logging tractor so that the drive wheel is located between the working surfaces of the casing simulation disks on the upper and lower inner surfaces of the I-shaped load turntable, and fix the centralizers at both ends in the corresponding fixed pipes;

[0015] Fourth, pressurizing the cable logging tractor so that the driving wheels of the cable logging tractor are opened up and down under the action of the support arms and supported on the arc surfaces of the upper and lower casing wall simulation disks;

[0016] 5. Start the cable logging tractor to rotate the drive wheel. The drive wheel drives the I-shaped load turntable to rotate through the casing wall simulation disk to simulate the state of the cable logging tractor crawling in the casing; record the number of rotations of the I-shaped load turntable and convert it into the crawling distance of the cable logging tractor. At the same time, record the continuous working time of the cable logging tractor.

[0017] In the step 5), the optical encoder is mounted on the I-shaped load turntable, and the number of rotations of the I-shaped load turntable is converted into the crawling distance of the cable logging tractor by collecting and detecting the optical encoder signal.

[0018] Also includes step 6): Conducting a judgment on the results of at least one durability test in the following AD:

[0019] A. Service life of the drive wheel: The continuous working time or drive creep distance recorded when one of the following two situations occurs is the service life of the drive wheel.

[0020] (1) Slippage occurs between the driving wheel and the casing wall simulation disk;

[0021] (2) The outer diameter of the drive wheel is detected to be more than 1.5 mm;

[0022] B. Service life of the transmission mechanism: When a failure occurs in the transmission mechanism of the cable logging tractor and the tractor cannot continue to work, the recorded continuous working time or the crawling distance of the tractor is the service life of the transmission mechanism;

[0023] C. Maximum continuous working time of the electronic circuit: When the electronic circuit fails and the tractor cannot work normally, the recorded continuous working time is the maximum continuous working time of the electronic circuit;

[0024] D. Trouble-free working time of the whole machine: When any component of the cable logging tractor fails and the tractor cannot work normally, the recorded continuous working time is the trouble-free working time of the whole machine.

[0025] Beneficial effects:

[0026] 1. The I-shaped load turntable can rotate under the drive of the driving wheel. The casing wall simulation disk is set to simulate the state of the casing wall, thereby simulating the continuous crawling of the driving wheel in the casing wall. Since the I-shaped load turntable can rotate continuously in the forward or reverse direction, it does not require an actual straight casing wall and can also simulate the linear reciprocating motion of the cable logging tractor crawling mechanism (referred to as the tractor) in the casing. The crawling distance of the tractor driving wheel when the I-shaped load turntable rotates one circle can be directly measured. Therefore, by calculating the number of rotations of the I-shaped load turntable, the service life of the driving wheel can be effectively recorded, thereby meeting the requirements of the durability test.

[0027] 2. The main components of the present invention are the main testing device and the auxiliary supporting device. The equipment is extremely simple, occupies a small area, has a low manufacturing cost, and is easy to maintain and repair.

[0028] 3. During the test, the drive arm is not inside the actual casing. Due to the structural characteristics of the I-shaped load turntable, one side of the drive wheel can be exposed, allowing direct observation of the obstacle-crossing process of the drive wheel and its impact on the drive wheel.

[0029] 4. The working surface of the casing wall simulation disk, where it meets the tractor's drive wheel, is a curved surface to fully simulate the local shape of the casing. The working surface of the casing wall simulation disk can also be configured with at least one of a convex shape, a through-hole, or a notch to simulate the complex working conditions encountered during crawling within the casing. For example, a convex shape can be used to simulate the diameter change of the protrusion at the connection between two casings; a through-hole can be used to simulate the casing after perforation; and a notch can be used to simulate the gap after the casing is released. By replacing different casing simulation disks, different working conditions can be simulated.

[0030] 5. The present invention has a simple structure, small size, is easy to install and maintain, easy to operate, has good reliability, can more realistically simulate actual working conditions, objectively and scientifically evaluate the service life of the mechanical structure and components of the tractor, and meet the requirements of durability experiments.

[0031] 6. The durability test method of the present invention is simple and easy to operate, has low requirements for the experimental environment, and can flexibly carry out durability tests on the service life of the driving wheel, the service life of the transmission mechanism (such as the motor, reducer, coupling sleeve, transmission shaft or gear), the maximum continuous working time of the electronic circuit, and the trouble-free working time of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the main view of the present invention in use.

[0033] Figure 2 It is a top view of the present invention in use.

[0034] Figure 3 This is the main view of the casing wall simulation disk of Example 1.

[0035] Figure 4 This is the main view of the casing wall simulation disk of Example 2.

[0036] Figure 5 This is the main view of the casing wall simulation disk of Example 3.

[0037] Among them, 1-main test device, 2-auxiliary support device, 3-cable logging tractor, 4-centralizer, 5-I-shaped load turntable, 6-casing wall simulation disk, 7-central axis, 8-bracket, 9-driving section, 10-pushing section, 11-electronic circuit section, 12-driving wheel, 13-fixed pipe, 14-support frame, 15-convex, 16-through hole, 17-arc surface, 18-notch. DETAILED DESCRIPTION

[0038] The present invention will be further explained below with reference to the accompanying drawings:

[0039] See also Figure 1 and Figure 2 In this embodiment, it includes a main test device 1 and auxiliary support devices 2 on both sides. The main test device 1 includes an I-shaped load turntable 5, a bracket 8 connected to the central axis 7 of the I-shaped load turntable 5, and casing wall simulation disks 6 corresponding to the upper and lower inner surfaces of the I-shaped load turntable 5. The working surface of the casing wall simulation disk 6 is in contact with the driving wheel 12 of the tractor, which is an arc surface 17 to fully simulate the local shape of the casing and improve the authenticity of the experiment. The working surface of the casing wall simulation disk 6 is provided with at least one of a convex shape 15, a through hole 16 or a notch 18. The three types can be used alone or in free combination. Figure 3 As an example of the first embodiment, the casing wall simulation disk 6 is provided with a convex shape 15 to simulate the diameter change of the convex part at the connection between the two casings. Figure 4 As the second example, the casing wall simulation plate 6 is provided with a through hole 16 for simulating the casing after perforation. Figure 5 As an example of the third embodiment, the casing wall simulation disk 6 is provided with both a convex shape 15 and a notch 18 for the diameter change of the convex shape at the connection between the two casings, and the notch simulates the working condition of the notch after the casing is disconnected. Those skilled in the art can simulate different working conditions by replacing different casing simulation disks 6 according to the test needs, meeting the requirements of different durability tests, which is very flexible and convenient. The casing wall simulation disk 6 is easily installed and removed by being snapped or bolted to the inner surface of the I-shaped load turntable 5. The auxiliary support device 2 is composed of a fixed tube 13 and a support frame 14 connected to the fixed tube.

[0040] The durability test method of the crawling mechanism of the cable logging tractor of the present invention comprises the following steps:

[0041] 1. Connect the two ends of the cable logging tractor 3 to the centralizer 4 (also known as the centering device);

[0042] 2. Then, the cable logging tractor 3 is placed in the test device, and the centralizers 4 at both ends are placed in the fixing tubes 13 of the auxiliary support devices 2 on both sides respectively;

[0043] 3. Rotate the wireline logging tractor 3 so that the drive wheel 12 of the drive section 9 is located between the working surfaces of the casing simulation disk 6 on the upper and lower inner surfaces of the I-shaped load turntable 5 (the drive wheel 12 corresponds to the arc surface 17). Fix the centralizers 4 at both ends in the corresponding fixing tubes 13, thereby fixing the two ends of the wireline logging tractor 3.

[0044] Fourth, pressurize the cable logging tractor 3 so that the driving wheel 12 of the cable logging tractor 3 is opened up and down under the action of the support arm and supported on the arc surface 17 of the upper and lower casing wall simulation disks 6;

[0045] 5. Start the cable logging tractor 3 to rotate the drive wheel 12. The drive wheel 12 drives the casing wall simulation disk 6 and ultimately drives the I-shaped load turntable 5 to rotate, so as to simulate the state of the cable logging tractor 3 crawling in the casing; record the number of rotations of the I-shaped load turntable 5 and convert it into the crawling distance of the cable logging tractor 3 (i.e., the crawling distance of the drive wheel 12), and record the continuous working time of the cable logging tractor 3.

[0046] In the step 5), the optical encoder is mounted on the I-shaped load turntable 5, and the number of rotations of the I-shaped load turntable 5 is converted into the crawling distance of the cable logging tractor by collecting and detecting the optical encoder signal.

[0047] Also includes step 6): Conducting a judgment on the results of at least one durability test in the following AD:

[0048] A. Service life of the driving wheel: The continuous working time or the driver creeping distance recorded when one of the following two situations occurs is the service life of the driving wheel 12,

[0049] (1) Slippage occurs between the driving wheel 12 and the casing wall simulation disk 6;

[0050] (2) The outer diameter of the drive wheel is detected to be more than 1.5 mm;

[0051] B. Service life of the transmission mechanism: When a failure occurs in the transmission mechanism (such as the motor, reducer, coupling, transmission shaft, or gear) of the wireline logging tractor 3 and the tractor cannot continue to operate, the recorded continuous operating time or the crawling distance of the wireline logging tractor is the service life of the transmission mechanism;

[0052] C. Maximum continuous working time of the electronic circuit: When a fault occurs in the electronic circuit, causing the cable logging tractor 3 to fail to work properly, the recorded continuous working time is the maximum continuous working time of the electronic circuit;

[0053] D. Trouble-free working time of the whole machine: When any component of the cable logging tractor 3 fails and the tractor cannot work normally, the recorded continuous working time is the trouble-free working time of the whole machine.

[0054] As needed, the I-shaped load turntable 5 can also be connected to an external brake to add load to simulate an underground load test. At the same time, the operator can also directly observe the working status of the driving section 9 from the exposed side of the I-shaped load turntable 5.

[0055] The present invention is applicable not only to single-drive tractors, but also to two-drive, three-drive, and even four-drive tractors with multiple drive segments 9. For example, for a three-drive tractor, three I-shaped load turntables 5 can be provided as needed. Each I-shaped load turntable 5 can be adjusted in direction and mounted to a corresponding drive wheel 12 in a drive segment 9 to conduct a synchronous durability test of the three-drive tractor, using the same method as described above. Alternatively, a single I-shaped load turntable 5 can be used to test each drive segment 9 separately. The present invention is flexible, easy to operate, and highly adaptable.

Claims

1. A durability test method for a cable logging tractor crawling mechanism, characterized in that: The following steps are involved:

1. Connect the two ends of the cable logging tractor to the centralizer respectively; Second, the cable logging tractor is then placed in the test device, and the centralizers at both ends are respectively placed in the fixed tubes of the auxiliary support devices on both sides; wherein, the test device includes a main test device and an auxiliary support device, and the main test device includes an I-shaped load turntable, a bracket connected to the central axis of the I-shaped load turntable, and casing wall simulation disks corresponding to the upper and lower inner surfaces of the I-shaped load turntable; the working surface of the casing wall simulation disk is provided with at least one of a convex shape, a through hole or a notch; the working surface of the casing wall simulation disk and the driving wheel of the cable logging tractor are in contact with an arc surface; 3. Rotate the wireline logging tractor so that the drive wheel is located between the working surfaces of the casing simulation disks on the upper and lower inner surfaces of the I-shaped load turntable, and fix the centralizers at both ends in the corresponding fixed pipes; Fourth, pressurizing the cable logging tractor so that the driving wheel of the cable logging tractor is opened up and down and supported on the arc surface of the upper and lower casing wall simulation disks under the action of the support arm; 5. Start the cable logging tractor to rotate the drive wheel. The drive wheel drives the I-shaped load turntable to rotate through the casing wall simulation disk to simulate the state of the cable logging tractor crawling in the casing; record the number of rotations of the I-shaped load turntable and convert it into the crawling distance of the cable logging tractor. At the same time, record the continuous working time of the cable logging tractor.

2. The durability test method of the crawling mechanism of the cable logging tractor according to claim 1, characterized in that: In the step 5, the optical encoder is mounted on the I-shaped load turntable, and the number of rotations of the I-shaped load turntable is converted into the crawling distance of the cable logging tractor by collecting and detecting the optical encoder signal.

3. The durability test method for the crawling mechanism of a cable logging tractor according to claim 1 or 2, characterized in that: The method also includes step 6: conducting a determination of the durability test results of at least one of the following ADs: A. Service life of the driving wheel: The continuous working time or traction unit creeping distance recorded when one of the following two situations occurs is the service life of the driving wheel. (1) Slippage occurs between the driving wheel and the casing wall simulation disk; (2) The outer diameter of the drive wheel is detected to be more than 1.5 mm; B. Service life of the transmission mechanism: When a failure occurs in the transmission mechanism of a wireline logging tractor and the tractor cannot continue to operate, the recorded continuous operating time or the crawling distance of the wireline logging tractor is the service life of the transmission mechanism; C. Maximum continuous working time of the electronic circuit: When the electronic circuit fails and the tractor cannot work normally, the recorded continuous working time is the maximum continuous working time of the electronic circuit; D. Trouble-free working time of the whole machine: When any component of the cable logging tractor fails and the tractor cannot work normally, the recorded continuous working time is the trouble-free working time of the whole machine.

4. The durability test method of the crawling mechanism of the cable logging tractor according to claim 1, characterized in that: The auxiliary supporting device consists of a fixing pipe and a supporting frame connected to the fixing pipe.

5. The durability test method of the crawling mechanism of the cable logging tractor according to claim 1, characterized in that: The I-shaped load turntable is externally connected to a brake.

6. The durability test method of the crawling mechanism of the cable logging tractor according to claim 1, characterized in that: The casing wall simulation disk is connected to the inner surface of the I-shaped load turntable by clamping or bolting.

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