Pipe static friction experiment instrument

Abstract

The utility model discloses a kind of tubular product static friction experimental apparatus, including fixed mechanism and angle adjusting mechanism, fixed mechanism is provided with response module, fixed mechanism is used to fixedly connect the tubular product to be measured, response module can respond when standard test bar sliding occurs in the tubular product to be measured;Angle adjusting mechanism includes power component and transmission component, power component includes driving part and speed reducer, driving part is connected with transmission component by speed reducer, transmission component is connected with fixed mechanism, driving part can drive fixed mechanism to change angle by speed reducer, transmission component. The utility model promptly feeds back by response module, and by slowing down the angle adjusting speed of the tubular product to be measured, improve experimental accuracy.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing technology, and in particular to a static friction tester for pipes. Background Technology

[0002] Static friction testing within power and communication conduits is a crucial process affecting the safety, efficiency, and cost of the entire power line project, and a key step in the production of these conduits. The purpose of this testing is to accurately assess the maximum resistance between the conduit's inner wall and the cable when relative motion occurs from a stationary state, providing vital mechanical information for subsequent fiber optic or electrical cable laying. This testing allows for the scientific prediction of the maximum traction force required for cable installation, ensuring it remains strictly within the cable's tensile strength safety threshold. This fundamentally prevents major quality accidents caused by overload, such as cable stretching, deformation, or even breakage, guaranteeing efficient, smooth, and reliable construction of power and communication conduits. Currently, static friction testing of power and communication conduits is mostly conducted using a static friction testing machine. This machine can adjust the angle of the conduit relative to the horizontal plane. A standard test rod is placed inside the conduit beforehand. When the standard test rod slides within the conduit, the critical angle of the conduit relative to the horizontal plane is recorded, and the static friction coefficient of the conduit relative to the standard test rod is calculated from this critical angle. However, most current static friction testers rely on manual adjustment of the angle between the test pipe and the horizontal plane by the tester. The angle adjustment speed is relatively fast, and it often happens that the standard test bar has already slid inside the test pipe but the tester fails to notice it in time. Or, due to the angle adjustment being too fast, the angle between the test pipe and the horizontal plane is far beyond the critical angle for sliding when the standard test bar slides inside the test pipe, which affects the test results. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a static friction testing instrument for pipes, which provides timely feedback through a response module and improves experimental accuracy by slowing down the angle adjustment speed of the pipe under test.

[0004] A static friction testing apparatus for pipes according to an embodiment of the present invention includes: The fixing mechanism is equipped with a response module. The fixing mechanism is used to fix the pipe to be tested, and the response module can respond when the standard test bar slides inside the pipe to be tested. An angle adjustment mechanism includes a power component and a transmission component. The power component includes a drive component and a reducer. The drive component is connected to the transmission component through the reducer. The transmission component is connected to the fixed mechanism. The drive component can drive the fixed mechanism to change its angle through the reducer and the transmission component.

[0005] A static friction testing apparatus for pipes according to an embodiment of the present invention has at least the following beneficial effects: By utilizing the deceleration effect of the reducer, the high-speed rotation of the drive component's output end is converted into a lower-speed rotation of the reducer's output end. This slower rotational speed drives the transmission component, which in turn causes a slow change in the angle between the fixed mechanism and the test pipe fixed to the fixed mechanism relative to the horizontal plane. When the angle between the test pipe and the horizontal plane exceeds a specified value, the downward component of the standard test rod along the axial direction of the test pipe exceeds its static friction force, causing the standard test rod to slide relative to the test pipe. The combination of the drive component and the reducer significantly slows down the angle adjustment speed of the test pipe. By the time the experimenter reacts and shuts off the motor, the angle between the test pipe and the horizontal plane is very close to the critical angle at which the standard test rod slides within the test pipe, preventing the angle between the test pipe and the horizontal plane from far exceeding the critical angle for sliding when the standard test rod begins to slide within the test pipe. The response module allows for timely alerting experimenters when the standard test probe slides within the test pipe. This prompts the operator to quickly and efficiently shut down the drive mechanism, reducing the likelihood of the test probe sliding without the operator noticing. Furthermore, by providing timely feedback and slowing down the angle adjustment of the test pipe, the module ensures that the tilt angle obtained in the static friction experiment more closely approximates the critical angle at which the standard test probe actually slides, thus improving experimental accuracy.

[0006] According to an embodiment of the present invention, a pipe static friction tester is provided, wherein the driving component is a stepper motor.

[0007] According to an embodiment of the present invention, a pipe static friction tester includes a transmission component comprising a support, a helical gear and a gear rod. The gear rod is connected to the output end of a reducer, and the outer wall of the gear rod is meshed with the circumferential side of the helical gear. The helical gear is rotatably connected to the support, and the helical gear is also connected to a fixing mechanism.

[0008] According to an embodiment of the present invention, a pipe static friction tester includes a transmission component that further includes a rotating cylinder, which is fixedly connected to the center of a helical gear, rotatably connected to a support, and also fixedly connected to a fixing mechanism.

[0009] According to an embodiment of the present invention, a pipe static friction tester includes a transmission component that further includes a bearing. The bearing is disposed inside the rotating cylinder, and the rotating cylinder is rotatably connected to the support through the bearing.

[0010] According to an embodiment of the present invention, a static friction tester for pipes includes a response module comprising a miniature megaphone positioned near the pipe to be tested within a fixed mechanism.

[0011] According to an embodiment of the present invention, a static friction tester for pipes includes a fixing mechanism comprising a connecting frame, a fixing seat, and a clamp. The connecting frame is connected to a transmission component, and the fixing seat and the clamp are also fixedly connected to the upper side of the connecting frame.

[0012] According to an embodiment of the present invention, a static friction tester for pipes has a limiting groove provided on the upper side of the fixed base.

[0013] According to an embodiment of the present invention, a static friction tester for pipes has a positioning block at one end of a fixed base, the upper part of which protrudes from the upper surface of the fixed base.

[0014] According to an embodiment of the present invention, a pipe static friction tester also includes a base, an angle adjustment mechanism is disposed on the base, and a first horizontal indicator is also disposed on the base.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a static friction tester for pipes and the pipe to be tested, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a static friction tester for pipes, the pipe to be tested, and a standard test bar according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the helical gear, gear rod, rotating cylinder, bearing, and fixed shaft of a pipe static friction tester according to an embodiment of the present invention. Figure 4 This is a left view of a pipe static friction testing apparatus according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the tilted state of a pipe static friction tester according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: Fixing mechanism 100; Response module 110; Miniature megaphone 111; Capacitive proximity sensor 112; Indicator light 113; Connecting bracket 120; Fixing base 130; Limiting groove 131; Clamp 140; Positioning block 150; Power unit 200; drive unit 210; reducer 220; Transmission assembly 300; bracket 310; helical gear 320; gear rod 330; rotating cylinder 340; bearing 350; fixed shaft 360; Angle display component 400; dial 410; pointer 420; Base 500; First level indicator 600; Second level indicator 700; Pipe to be tested: 800; Standard test bar: 810. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 5This utility model provides a static friction tester for pipes, including a fixing mechanism 100 and an angle adjustment mechanism. The fixing mechanism 100 is equipped with a response module 110. The fixing mechanism 100 is used to fix and connect the pipe to be tested 800. The response module 110 can respond when a standard test bar 810 slides within the pipe to be tested 800. The angle adjustment mechanism includes a power component 200 and a transmission component 300. The power component 200 includes a drive component 210 and a reducer 220. The drive component 210 is connected to the transmission component 300 through the reducer 220. The component 300 is connected to the fixed mechanism 100. The driving component 210 can drive the fixed mechanism 100 to change angle through the reducer 220 and the transmission component 300. Specifically, the output end of the driving component 210 rotates, and the reducer 220 can reduce the rotation speed. This slower rotation speed is used to drive the transmission component 300 to move, thereby causing the fixed mechanism 100 to change angle relative to the horizontal plane. Finally, the test tube 800 fixed on the fixed mechanism 100 is tilted, causing the standard test rod 810 inside the test tube 800 to slide.

[0023] An angle display component 400 is also provided between the fixing mechanism 100 and the angle adjustment mechanism. The angle display component 400 is used to display the relative angle change between the fixing mechanism 100 and the angle adjustment mechanism.

[0024] The reducer 220 can convert the high speed and low torque at its input end into the low speed and high torque at its output end. By using the reduction effect of the reducer 220, the higher speed rotation at the output end of the drive component 210 can be converted into the lower speed rotation at the output end of the reducer 220. This slower rotation speed is used to drive the transmission component 300 to move, thereby causing the fixed mechanism 100 and the test pipe 800 fixed on the fixed mechanism 100 to slowly change the angle relative to the horizontal plane. When the angle between the test pipe 800 and the horizontal plane is greater than a specified value, the downward component of the standard test bar 810 along the axial direction of the test pipe 800 is greater than its static friction force, and the standard test bar 810 slides relative to the test pipe 800. The combination of drive component 210 and reducer 220 significantly slows down the angle adjustment speed of the pipe under test 800. This ensures that when the operator reacts and shuts off the motor, the angle of the pipe under test 800 relative to the horizontal plane is very close to the critical angle at which the standard test rod 810 slides within the pipe under test 800. This avoids situations where the angle of the pipe under test 800 relative to the horizontal plane far exceeds the critical angle for sliding when the standard test rod 810 slides within the pipe under test. Using response module 110, when the standard test rod 810 slides within the pipe under test 800, a timely response is provided, alerting the operator that the standard test rod 810 has slipped. This allows the operator to shut off drive component 210 more quickly and promptly, reducing the likelihood of the standard test rod 810 sliding within the pipe under test without the operator noticing in time. The response module 110 provides timely feedback to the experimenters, and by slowing down the angle adjustment speed of the pipe under test 800, the tilt angle result of the pipe under test 800 obtained in the static friction experiment is closer to the critical angle at which the real standard test bar 810 slides, thus improving the accuracy of the experiment.

[0025] According to some embodiments of this application, the driving component 210 is a stepper motor. Specifically, the stepper motor is electrically connected to a driving module (not shown in the figure), which includes a driver and a microcontroller. The experimenter controls the stepper motor through the driving module, utilizing the stepper motor's ability to adjust different speeds to achieve different angle changes in the fixed mechanism 100. A higher speed is output when the tilt angle of the fixed mechanism 100 relative to the horizontal plane is small, and a lower speed is output when the tilt angle of the fixed mechanism 100 relative to the horizontal plane approaches the critical angle at which the standard test rod 810 slides. This avoids excessive rotation of the fixed mechanism 100 while improving experimental efficiency. The experimenter can also control the output of the stepper motor to rotate by a specified angle through the driving module. When the tilt angle of the fixed mechanism 100 relative to the horizontal plane approaches the critical angle at which the standard test rod 810 slides, the stepper motor rotates by small angles successively. In conjunction with the reducer 220, the fixed mechanism 100 rotates by small angles successively, bringing the angle at which the standard test rod 810 slides closer to the critical angle.

[0026] It is understood that in some other embodiments, the drive element 210 may also be a servo motor.

[0027] Furthermore, referring to Figures 1 to 3 The transmission assembly 300 includes a bracket 310, a helical gear 320, and a gear rod 330. The gear rod 330 is connected to the output end of the reducer 220. The outer wall of the gear rod 330 is meshed with the circumferential side of the helical gear 320. The helical gear 320 is rotatably connected to the bracket 310 and is also connected to the fixing mechanism 100. Specifically, the helical gear 320 has a semi-circular structure to reduce its height and volume. Several helical grooves are evenly spaced on the arc-shaped lower sidewall of the helical gear 320. The gear rod 330 has helical grooves on its circumferential sidewall. The helical gear 320 and the gear rod 330 form a worm gear structure. Specifically, the end of the gear rod 330 furthest from the reducer 220 is rotatably connected to the bracket 310. The bracket 310 provides support and stabilizes the rotation axis of the helical gear 320 and the gear rod 330. The rotation of the output end of the reducer 220 drives the gear rod 330 to rotate. The rotation of the gear rod 330 drives the helical gear 320 to rotate about the horizontal line perpendicular to the gear rod 330. The rotation of the helical gear 320 then drives the fixed mechanism 100 to rotate, ultimately realizing the angle change of the fixed mechanism 100 relative to the horizontal plane.

[0028] Furthermore, referring to Figure 2 and Figure 3The transmission assembly 300 also includes a rotating cylinder 340, which is fixedly connected to the center of the helical gear 320. The rotating cylinder 340 is rotatably connected to the bracket 310 and also fixedly connected to the fixing mechanism 100. The rotating cylinder 340 can further stabilize the rotation axis of the semi-circular helical gear 320 and improve the connection reliability between the transmission assembly 300 and the fixing mechanism 100.

[0029] Furthermore, referring to Figure 2 and Figure 3 The transmission assembly 300 also includes a bearing 350, which is disposed inside the rotating cylinder 340. The rotating cylinder 340 is rotatably connected to the bracket 310 via the bearing 350. Specifically, the outer ring of the bearing 350 is tightly connected to the inner wall of the rotating cylinder 340, and the inner ring of the bearing 350 is fixedly connected to the bracket 310, thereby enabling the rotating cylinder 340 to be rotatably connected to the bracket 310 via the bearing 350. The bearing 350 improves the smoothness of the rotation of the rotating cylinder 340 and the helical gear 320 relative to the bracket 310.

[0030] As a preferred option, bearing 350 is a cylindrical roller bearing.

[0031] It is understood that, in some other embodiments, reference is made to... Figure 2 and Figure 3 The transmission assembly 300 also includes a fixed shaft 360, which passes through the bearing 350 and is fixedly connected to the inner ring of the bearing 350. Both ends of the fixed shaft 360 are fixedly connected to the bracket 310. The fixed shaft 360 improves the reliability of the fixed connection between the bearing 350 and the bracket 310.

[0032] As a preferred option, refer to Figure 1 and Figure 2 The angle display component 400 includes a dial 410 and a pointer 420. The dial 410 is fixed to one side of the bracket 310 along the axial direction of the helical gear 320, and the pointer 420 is fixedly connected to the connecting bracket 120. The bracket 310 is perpendicular to the base 500. When the fixing mechanism 100 changes angle relative to the bracket 310, the pointer 420 can rotate by the corresponding angle around the center of the dial 410. When the fixing mechanism 100 is perpendicular to the bracket 310 (at this time, the fixing mechanism 100 is parallel to the base 500), the pointer 420 points to the initial marked position of the dial 410, such as the 0-degree position. By rotating the pointer 420 around the center of the dial 410, the angle of rotation of the fixing mechanism 100 relative to the bracket 310 can be displayed intuitively.

[0033] According to some embodiments of this application, refer to Figure 1 , Figure 2 and Figure 4The response module 110 includes a miniature megaphone 111, which is positioned near the test tube 800 of the fixing mechanism 100. Since the test tube 800 is mostly opaque, and the standard test rod 810 is pre-placed inside the test tube 800, it is difficult for the experimenter to visually determine whether the standard test rod 810 is sliding inside the test tube 800. However, when the standard test rod 810 slides against the test tube 800, it produces a sound due to sliding friction. This sound is amplified by the miniature megaphone 111 positioned near the test tube 800 of the fixing mechanism 100, making it easier for the experimenter to hear the sound and promptly shut down the drive unit 210.

[0034] According to some embodiments of this application, refer to Figure 1 , Figure 2 and Figure 4 The fixing mechanism 100 includes a connecting frame 120, a fixing seat 130, and a clamp 140. The connecting frame 120 is connected to the transmission assembly 300, and the fixing seat 130 and the clamp 140 are also fixedly connected to the upper side of the connecting frame 120. The connecting frame 120, the fixing seat 130, and the clamp 140 cooperate to restrict and connect the pipe to be tested 800 to the upper side of the fixing seat 130, and to allow the pipe to be tested 800 to change angle with the fixing seat 130 and the connecting frame 120.

[0035] Furthermore, a limiting groove 131 is provided on the upper side of the fixing base 130. Specifically, refer to... Figure 4 The limiting groove 131 has a V-shaped structure, which facilitates limiting the pipe 800 to be tested in multiple directions and makes the axis of the pipe 800 parallel to the axis of the fixing seat 130. The V-shaped limiting groove 131 can also be adapted to various pipes 800 with different diameters.

[0036] Furthermore, referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 A positioning block 150 is provided at one end of the fixed base 130, with the upper part of the positioning block 150 protruding from the upper surface of the fixed base 130. Specifically, the lower part of the positioning block 150 is fixedly connected to one end of the fixed base 130, and the upper part of the positioning block 150 protrudes from the upper surface of the fixed base 130. After the pipe to be tested 800 is placed on the upper side of the fixed base 130, the pipe to be tested 800 can be moved to the right and abutted against the left side of the positioning block 150, thus positioning the pipe to be tested 800. Then, the standard test bar 810 is placed inside the pipe to be tested 800 and pushed to the left side of the positioning block 150. The positioning block 150 is used to make the right end of the pipe to be tested 800, the right end of the standard test bar 810, and the right end of the fixed base 130 flush, which can unify the initial conditions of the static friction test of the pipe and obtain more comparable experimental data.

[0037] According to some embodiments of this application, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 It also includes a base 500, an angle adjustment mechanism is mounted on the base 500, and a first level indicator 600 is also mounted on the base 500. By mounting both the power component 200 and the transmission component 300 of the angle adjustment mechanism on the base 500, the relative positional stability between the power component 200 and the bracket 310 can be improved, thereby driving and adjusting the angle of the helical gear 320 relative to the horizontal plane more stably.

[0038] It is understood that, in some other embodiments, reference is made to... Figure 1 , Figure 2 , Figure 4 The connecting frame 120 is also equipped with a second level indicator 700, which can improve the reliability of the adjustment level of the fixing mechanism 100.

[0039] It is understood that, in some other embodiments, reference is made to... Figure 1 , Figure 2 The response module 110 also includes a capacitive proximity sensor 112 and an indicator light 113. The capacitive proximity sensor 112 and the indicator light 113 are electrically connected. The capacitive proximity sensor 112 is installed inside the positioning block 150, with its left side aligned with the left side of the positioning block 150. The capacitive proximity sensor 112 can detect whether the standard test rod 810 is moving away from it, thus obtaining information about the standard test rod 810 sliding within the test tube 800. The capacitive proximity sensor 112 can also transmit this information to the indicator light 113, and the color change or on / off change of the indicator light 113 will alert the experimenter.

[0040] Working principle: The first level indicator 600 is used to adjust the level of the base 500. After the base 500 is parallel to the horizontal plane, the fixing mechanism 100 is simply adjusted to be parallel to the base 500 (at this time, the pointer 420 points to the initial mark position of the dial 410), thus initializing the fixing mechanism 100 to a horizontal state (refer to...). Figure 1 , Figure 2 and Figure 4The second level indicator 700 can be used to further confirm whether the fixing mechanism 100 is in a horizontal state; the pipe to be tested 800 is placed on the fixing mechanism 100 and abuts against the left side of the positioning block 150, and the standard test rod 810 is placed inside the pipe to be tested 800 and abuts against the left side of the positioning block 150, thus completing the initialization of the experimental conditions; the experimenter operates the stepper motor, which slowly drives the fixing mechanism 100 to rotate through the reducer 220, causing the angle between the fixing mechanism 100 and the pipe to be tested 800 relative to the horizontal plane to change. When the pipe to be tested 800 reaches the critical angle relative to the horizontal plane (refer to...). Figure 5 When the test rod slides inside the pipe 800 under test, the miniature loudspeaker 111, the capacitive proximity sensor 112, and the indicator light 113 respond, reminding the experimenter to shut down the drive component 210 in time. The experimenter obtains the tilt angle of the pipe 800 under test relative to the horizontal plane by reading the angle display component 400, and can obtain the static friction coefficient data of the pipe 800 under test by calculation.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A static friction testing apparatus for pipes, characterized in that, include: The fixing mechanism (100) is provided with a response module (110). The fixing mechanism (100) is used to fix and connect the pipe to be tested (800). The response module (110) can respond when the standard test bar (810) slides inside the pipe to be tested (800). An angle adjustment mechanism includes a power component (200) and a transmission component (300). The power component (200) includes a drive component (210) and a reducer (220). The drive component (210) is connected to the transmission component (300) through the reducer (220). The transmission component (300) is connected to the fixing mechanism (100). The drive component (210) can drive the fixing mechanism (100) to change its angle through the reducer (220) and the transmission component (300).

2. The pipe static friction testing apparatus according to claim 1, characterized in that, The driving component (210) is a stepper motor.

3. The pipe static friction testing apparatus according to claim 2, characterized in that, The transmission assembly (300) includes a bracket (310), a helical gear (320), and a gear rod (330). The gear rod (330) is connected to the output end of the reducer (220). The outer wall of the gear rod (330) is meshed with the circumferential side of the helical gear (320). The helical gear (320) is rotatably connected to the bracket (310). The helical gear (320) is also connected to the fixing mechanism (100).

4. The static friction test apparatus for pipes according to claim 3, characterized in that, The transmission assembly (300) further includes a rotating cylinder (340), which is fixedly connected to the center of the helical gear (320). The rotating cylinder (340) is rotatably connected to the bracket (310) and is also fixedly connected to the fixing mechanism (100).

5. The pipe static friction testing apparatus according to claim 4, characterized in that, The transmission assembly (300) further includes a bearing (350), which is disposed inside the rotating cylinder (340), and the rotating cylinder (340) is rotatably connected to the bracket (310) through the bearing (350).

6. The pipe static friction testing apparatus according to claim 1, characterized in that, The response module (110) includes a miniature megaphone (111) which is positioned near the test pipe (800) of the fixing mechanism (100).

7. The static friction test apparatus for pipes according to claim 1, characterized in that, The fixing mechanism (100) includes a connecting frame (120), a fixing seat (130) and a clamp (140). The connecting frame (120) is connected to the transmission assembly (300), and the fixing seat (130) and the clamp (140) are also fixedly connected to the upper side of the connecting frame (120).

8. The pipe static friction testing apparatus according to claim 7, characterized in that, The upper side of the fixed base (130) is provided with a limiting groove (131).

9. A static friction testing apparatus for pipes according to claim 7, characterized in that, A positioning block (150) is provided at one end of the fixed base (130), and the upper part of the positioning block (150) protrudes from the upper surface of the fixed base (130).

10. A static friction testing apparatus for pipes according to claim 1, characterized in that, It also includes a base (500), the angle adjustment mechanism is disposed on the base (500), and a first level indicator (600) is disposed on the base (500).

Images