Pipe friction factor detector

Abstract

The application discloses a pipeline friction coefficient detector and relates to the field of friction coefficient detection. The pipeline friction coefficient detector comprises horizontal supporting rods and vertical supporting rods, the horizontal supporting rods and the vertical supporting rods are fixed perpendicularly, a sliding block is slidably connected with the vertical supporting rods, an inclined supporting rod is hingedly connected with one end of the horizontal supporting rods, a sleeve is connected with the inclined supporting rod, a connecting rod is hingedly connected with the sliding block, and the sleeve and the connecting rod are slidably connected, and a chuck assembly is used for fixing a pipeline to be detected. The pipeline friction coefficient detector can automatically detect a communication pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to a friction coefficient detector, in particular to a pipe friction coefficient detector. BACKGROUND

[0002] The appendix A in the People's Republic of China Telecommunication Industry Standard (YD / T 841.1-2008) Plastic Pipes for Underground Telecommunication Pipelines Part 1: General Requirements discloses a test method for determining static friction coefficient by flat plate method, specifically, a pipe to be tested with a length of 500ml is placed on a test slope, the generatrix of the pipe to be tested is parallel to the slope and is fastened. A standard test bar is placed in the pipe to be tested, the length direction is parallel to the axis of the pipe to be tested, and the distance of the test bar exposed from the pipe to be tested is about 20mm. A lifting device is used to slowly lift the lifting device, and the typical speed is 10mm / min, until the test bar starts to slide downward, the values of the horizontal scale and the vertical scale are recorded, and the static friction coefficient is calculated according to the formula μ=F / N=(mgsinα) / (mgcosα)=l1 / l2, wherein l1 is the vertical height of the slope, and l2 is the horizontal length of the slope, that is, the tangent value of the friction coefficient of the pipe to be tested, and a total of 8 tests are performed, and each time the pipe to be tested is rotated by about 45°, and the arithmetic average of the 8 times is taken as the test result. According to the test method, in order to test the static friction coefficient of the pipe to be tested, a slope test table capable of changing the included angle is required, and currently there is no such test table on the market. SUMMARY

[0003] The present application aims to provide a pipe friction coefficient detector according to the static friction coefficient test method provided by the national standard.

[0004] Technical scheme: the pipe friction coefficient detector comprises:

[0005] horizontal support rods and vertical support rods, the horizontal support rods and the vertical support rods are fixed vertically;

[0006] a sliding block, the sliding block slides relative to the vertical support rods;

[0007] a slope support rod, one end of the slope support rod is hinged to the horizontal support rod, and the other end is connected with a sleeve;

[0008] a connecting rod, the connecting rod is hinged to the sliding block and is slidingly connected with the sleeve;

[0009] a chuck assembly, the chuck assembly comprises at least three clamping jaws, a rotating disc and a fixed plate, the fixed plate is fixed to the slope support rod, the rotating disc is rotationally connected with the fixed plate, the clamping jaws are rotationally connected with the rotating disc, the chuck assembly is used for fixing a pipe to be tested, and the rotating disc can drive the pipe to be tested to rotate.

[0010] Further, the chuck assembly further comprises at least three driven gears, a driving gear and a knob; the driven gears, the driving gear and the knob are rotationally connected in the rotating disc; the driven gears and the driving gear are in mesh transmission with the driving gear respectively; the knob is connected with the driving gear; at least three clamping jaws are connected with the at least three driven gears one by one.

[0011] Further, the chuck assembly further comprises a gear lever and a coil spring; the gear lever is slidingly connected with the fixed plate; at least eight arc-shaped sliding grooves are arranged on the abutting surface of the rotating disc and the fixed plate; the at least eight sliding grooves are connected in a head-to-tail mode, and the depths of the at least eight sliding grooves increase gradually; the coil spring is connected with the rotating disc and the fixed plate respectively; the coil spring can drive the rotating disc to rotate.

[0012] Further, the gear lever comprises a lever body, a spring and a limiting ball; the limiting ball is connected into the lever body through the spring; the fixed plate is provided with at least eight limiting grooves; the at least eight limiting grooves are arrayed along the sliding direction of the gear lever.

[0013] Further, an angle gauge for measuring the included angle between the inclined support rod and the horizontal support rod is further comprised; the angle gauge is fixedly connected at the hinge joint of the inclined support rod and the horizontal support rod; the angle gauge is provided with a guide groove; the inclined support rod is connected with an indicating block; the indicating block reciprocally slides in the guide groove.

[0014] Further, an electric push rod and an adjusting screw are connected on the inclined support rod; the telescopic direction of the electric push rod is parallel to the inclined support rod; the adjusting screw is used for assisting in supporting the pipe to be measured.

[0015] Further, a screw rod is rotationally connected with the vertical support rod; the screw rod is arranged in parallel with the vertical support rod; one end of the screw rod is connected with a driver for driving the self-rotation of the screw rod; the vertical support rod is provided with a guide rail; a sliding block is slidingly connected with the guide rail and cooperatively connected with the screw rod.

[0016] Further, the horizontal support rod comprises a lever body and a connecting plate; the bottom of the connecting plate is fixed with the lever body; the top of the connecting plate is hingedly connected with the inclined support rod.

[0017] Further, the inclined support rod is provided with a sensor for detecting the action of the test rod.

[0018] Further, the clamping jaw is provided with a stepped surface with a height of at least 20 cm.

[0019] The pipeline friction coefficient detector has at least the following technical effects:

[0020] (1) the slider can drive the connecting rod to move, the relative sliding of the connecting rod and the sleeve can change the included angle between the inclined support rod and the horizontal support rod, and then the relative sliding between the pipe to be tested and the test rod is caused, that is, the same technical effect as the test inclined surface is achieved;

[0021] (2) the protractor added in the application can conveniently read the tangent value of the inclined support rod and the horizontal support rod;

[0022] (3) the pipe to be tested can be controlled to complete rotation through the gear lever, the inclined support rod is provided with a sensor, when the sensor detects that the test rod slides down, the slider stops sliding, so that the included angle between the horizontal support rod and the inclined support rod is locked, and the degree of automation is high. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 it is a structure schematic view of the pipe to be tested clamped in the application;

[0024] Figure 2 it is a structure schematic view of the application;

[0025] Figure 3 it is a structure schematic view of the chuck assembly in the application;

[0026] Figure 4 it is a front view of the chuck assembly in the application;

[0027] Figure 5 it is a partial sectional view of the chuck assembly in the application;

[0028] Figure 6 it is Figure 5 a structure enlarged view of A part in the application;

[0029] Figure 7 it is an exploded view of the chuck assembly in the application;

[0030] Figure 8 it is a structure view of the chuck assembly and the fixed plate at the bonding surface.

[0031] In the drawings, 1, horizontal support rod; 2, vertical support rod; 3, slider; 4, inclined support rod; 5, sleeve; 6, connecting rod; 7, chuck assembly; 8, clamping jaw; 9, rotating disc; 10, fixed plate; 11, pipe to be tested; 12, driven gear; 13, driving gear; 14, driving gear; 15, knob; 16, gear lever; 17, coil spring; 18, sliding groove; 19, rod body; 20, spring; 21, limiting ball; 22, limiting groove; 23, protractor; 24, guide groove; 25, indicating block; 26, electric push rod; 27, adjusting screw; 28, screw rod; 29, driver; 30, guide rail; 31, connecting plate; 33, sensor; 34, step surface; 35, main part. DETAILED DESCRIPTION

[0032] The principles and features of the present application are described below in conjunction with the accompanying Figure 1 The principles and features of the present application are described below in conjunction with the accompanying

[0033] A pipeline friction coefficient detector, comprising a horizontal support rod 1, a vertical support rod 2, a sliding block 3, an inclined support rod 4, a sleeve 5, a connecting rod 6, a chuck assembly 7, a protractor 23, an electric push rod 26, a screw rod 28, a driver 29, a guide rail 30, a sensor 33.

[0034] The horizontal support rod 1 and the vertical support rod 2 are fixed perpendicularly. The horizontal support rod 1 comprises a body and a connecting plate 31, and the inclined support rod 4, the vertical support rod 2 and the body are made of aluminum alloy profiles. The bottom of the connecting plate 31 is fixedly connected to one end of the body. One end of the inclined support rod 4 is hingedly connected to the connecting plate 31, and the other end of the inclined support rod 4 is fixedly connected to the sleeve 5. The sliding block 3 is slidingly connected to the vertical support rod 2, one end of the connecting rod 6 is hingedly connected to the sliding block 3, and the connecting rod 6 passes through the sleeve 5 and is slidingly connected to the sleeve 5. The horizontal support rod 1, the vertical support rod 2, the inclined support rod 4 and the connecting rod 6 form a right-angled triangle, wherein the horizontal support rod 1 and the vertical support rod 2 respectively constitute the right-angled sides of the right-angled triangle, and the inclined support rod 4 and the connecting rod 6 together constitute the hypotenuse of the right-angled triangle. The sliding block 3 reciprocally slides along the vertical support rod 2, and the sliding of the sliding block 3 can drive the connecting rod 6 and the sleeve 5 to slide relative to each other, thereby changing the included angle between the inclined support rod 4 and the horizontal support rod 1. Specifically, the screw rod 28 is a lead screw, the screw rod 28 is rotationally connected to the vertical support rod 2, the driver 29 is a servo motor, and the driver 29 drives the screw rod 28 to rotate through a shaft coupling; the guide rail 30 is fixedly connected to the vertical support rod 2; the sliding block 3 is connected to the screw rod 28 and the guide rail 30 at the same time. Under the action of the driver 29 and the screw rod 28, the sliding block 3 can reciprocally move up and down, thereby driving the inclined support rod 4 to reciprocally swing around the hinge point of the inclined support rod 4 and the horizontal support rod 1.

[0035] The protractor 23 is fixedly connected to the hinge point of the horizontal support rod 1 and the inclined support rod 4, and the protractor 23 is used to measure the angle between the horizontal support rod 1 and the inclined support rod 4. Specifically, the protractor 23 is provided with a guide groove 24, the inclined support rod 4 is fixedly connected with an indicating block 25, and the indicating block 25 extends into the guide groove 24. The reciprocally swinging of the inclined support rod 4 can drive the indicating block 25 to reciprocally slide in the guide groove 24, so that the indicating block 25 can display the included angle between the horizontal support rod 1 and the inclined support rod 4, so as to facilitate reading the tangent value of the included angle, i.e. the friction coefficient of the pipeline 11 to be measured.

[0036] The chuck assembly 7 comprises three clamping jaws 8, a rotating disc 9, a fixed plate 10, three driven gears 12, a driving gear 13, a driving gear 14, a knob 15, a gear lever 16 and a coil spring 17. The three driven gears 12, the driving gear 13 and the driving gear 14 are all rotationally connected to the rotating disc 9. The three driven gears 12 are all in meshing transmission with the driving gear 13, and at the same time, the driving gear 14 is also in meshing transmission with the driving gear 13. The knob 15 is arranged on the surface of the rotating disc 9, and the knob 15 is connected with the driving gear 14. Rotating the knob 15 can make the driving gear 14 rotate, and in turn drive the driving gear 13 and the driven gears 12 to rotate. The three clamping jaws 8 are respectively connected with the three driven gears 12, and the rotation of the three driven gears 12 can drive the three clamping jaws 8 to rotate and in turn clamp the pipe to be tested 11. A 20cm high stepped surface 34 is arranged on the clamping jaw 8, because the national standard requires that the test rod needs to protrude from the pipe to be tested 11 by 20cm, and the stepped surface 34 is arranged to reserve space for the protrusion of the test rod. The rotating disc 9 is rotationally connected to the fixed plate 10 through a bearing, and the coil spring 17 is connected between the rotating disc 9 and the fixed plate 10. When the coil spring 17 is in a compressed state, the rotating disc 9 has a movement tendency of rotating relative to the fixed plate 10. Eight sliding grooves 18 are arranged on the abutting surface of the rotating disc 9 and the fixed plate 10. The eight sliding grooves 18 are arc-shaped, the central angle of which is 45°, and the eight sliding grooves 18 are enclosed to form a circle. The depths of the eight sliding grooves 18 increase gradually. The gear lever 16 is slidingly connected with the fixed plate 10, one end of the gear lever 16 extends into one of the sliding grooves 18, and each time the gear lever 16 is pulled out by one gear, the rotating disc 9 drives the pipe to be tested 11 to rotate by 45°. Specifically, the gear lever 16 is composed of a lever body 19, a spring 20 and a limiting ball 21. The limiting ball 21 is connected into the lever body 19 through the spring 20. The fixed plate 10 is provided with at least eight limiting grooves 22, and the at least eight limiting grooves 22 are arrayed along the sliding direction of the gear lever 16. The distance between any two adjacent limiting grooves 22 is equal to the height difference between any two adjacent sliding grooves 18.

[0037] The inclined support rod 4 is provided with a sensor 33 for detecting the action of the test rod. When the test rod starts to slide down, the sensor 33 senses the signal and controls the driver 29 to stop through the control system, so as to lock the included angle between the inclined support rod 4 and the horizontal support rod 1. The electric push rod 26 is fixedly connected to the horizontal support rod 1, and the extension direction of the electric push rod 26 is parallel to the horizontal support rod 1. The electric push rod 26 can push the test rod back to the original position after each test, and the sensor 33 can also be used to detect whether the test rod returns to the original position. The inclined support rod 4 is provided with an adjusting screw 27, which is used to assist in supporting the pipe to be tested 11.

[0038] The specific operation method of the present application is: (1) fixing the pipe to be tested 11 on the chuck assembly 7, and then placing the test rod in the pipe to be tested 11, and the sensor 33 needs to detect the presence of the test rod; (2) starting the driver 29, the inclined support rod 4 starts to swing upward, when the sensor 33 detects that the test rod starts to slide down, the driver 29 stops, the inclined support rod 4 is locked with the horizontal support rod 1, at this time the angle of the protractor 23 is read, and the tangent value is calculated; (3) the other inclined support rod 4 returns to the initial position, the gear lever 16 is pulled to slide one gear, under the action of the coil spring 17, the chuck assembly 7 drives the pipe to be tested 11 to rotate 45°, the test rod is pushed back to the test position by the extension of the electric push rod 26 (until the sensor 33 detects the signal), then the electric push rod 26 is retracted to separate the electric push rod 26 from the test rod, and steps (1) to (2) are repeated; (4) the measurement is repeated eight times in this way, and the arithmetic mean is calculated, which is the friction coefficient of the pipe to be tested 11.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipe friction factor detector characterized by, The utility model relates to a pipe friction coefficient detector, including: Horizontal support (1) and vertical support (2), the horizontal support (1) and vertical support (2) are fixed vertically; Slide (3) relative to vertical support (2) sliding; Inclined support (4), one end of the inclined support (4) is hinged with horizontal support (1), and the other end is connected with sleeve (5); Connecting rod (6) is hinged with slide (3), and is slidingly connected with sleeve (5); Chuck assembly (7) includes at least three clamping jaws (8), rotating disc (9) and fixed plate (10);The fixed plate (10) is fixed to the inclined support (4), the rotating disc (9) is rotatably connected with the fixed plate (10), the clamping jaw (8) is rotatably connected with the rotating disc (9), and the chuck assembly (7) is used for fixing the pipe (11) to be measured, and the rotating disc (9) can rotate and drive the pipe (11) to be measured to rotate; The chuck assembly (7) further includes a gear lever (16) and a coil spring (17), the gear lever (16) is slidingly connected with the fixed plate (10), at least eight arc-shaped sliding grooves (18) are arranged on the abutting surface of the rotating disc (9) and the fixed plate (10), the at least eight sliding grooves (18) are connected end to end, and the depths of the at least eight sliding grooves (18) gradually increase;The coil spring (17) is connected with the rotating disc (9) and the fixed plate (10) respectively, and the coil spring (17) can drive the rotating disc (9) to rotate; The gear lever (16) includes a rod body (19), a spring (20) and a limiting ball (21), the limiting ball (21) is connected into the rod body (19) by the spring (20), and the fixed plate (10) is provided with at least eight limiting grooves (22), and the at least eight limiting grooves (22) are arrayed along the sliding direction of the gear lever (16).

2. The pipe friction coefficient detector according to claim 1, wherein: The chuck assembly (7) further includes at least three driven gears (12), a driving gear (13), a driving gear (14) and a knob (15), the driven gears (12), the driving gear (13) and the driving gear (14) are rotatably connected in the rotating disc (9), the driven gears (12) and the driving gear (14) are respectively engaged with the driving gear (13) to drive, the knob (15) is connected with the driving gear (14), and the at least three clamping jaws (8) are connected with the at least three driven gears (12) one by one.

3. The pipe friction coefficient detector according to claim 1, wherein: Further including an angle gauge (23) for measuring the angle between the inclined support (4) and the horizontal support (1), the angle gauge (23) is fixedly connected at the hinge joint of the inclined support (4) and the horizontal support (1), the angle gauge (23) is provided with a guide groove (24), the inclined support (4) is connected with an indicating block (25), and the indicating block (25) reciprocally slides in the guide groove (24).

4. The pipe friction coefficient detector according to claim 1, wherein: The inclined support rod (4) is connected with an electric push rod (26) and an adjusting screw (27), the telescopic direction of the electric push rod (26) is parallel to the inclined support rod (4), and the adjusting screw (27) is used for assisting in supporting the pipe (11) to be tested.

5. The pipe friction coefficient detector according to claim 1, characterized in that: The vertical support rod (2) is rotationally connected with a screw rod (28), the screw rod (28) is arranged in parallel with the vertical support rod (2), one end of the screw rod (28) is connected with a driver (29) for driving the screw rod (28) to rotate, the vertical support rod (2) is provided with a guide rail (30), the sliding block (3) is slidingly connected with the guide rail (30) and is connected with the screw rod (28) in a matched mode.

6. The pipe friction coefficient detector according to claim 1, characterized in that: The horizontal support rod (1) comprises a main part (35) and a connecting plate (31), the bottom of the connecting plate (31) is fixed with the main part (35), and the top of the connecting plate (31) is hingedly connected with the inclined support rod (4).

7. The pipe friction coefficient detector according to claim 1, characterized in that: The inclined support rod (4) is provided with a sensor (33) for detecting the action of the test rod.

8. The pipe friction coefficient detector according to claim 1, characterized in that: The clamping jaw (8) is provided with a stepped surface (34) with a height of at least 20 cm.

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