CN110411939A - A device and method for testing the coefficient of static friction of pipelines - Google Patents

Abstract

The invention relates to the field of electric pipeline testing, and provides a pipeline static friction coefficient test device and method, the test device includes a base, a test platform, an angle adjustment mechanism, an adsorption component, a limit switch and an angle measurement component, and the adsorption component is installed on the pipeline Between the positioning component and the free end of the test platform, the adsorption component and the pipeline positioning component are arranged correspondingly, and the angle adjustment mechanism and the angle measurement component are both electrically connected to the limit switch. The pipe static friction coefficient testing device and method provided by the present invention, by arranging the adsorption parts at the corresponding positions of the pipe positioning parts, can keep the initial sliding position of the test rod consistent, improve the accuracy of the measurement results, and at the same time use the limit switch and angle detection The linkage control of components and angle adjustment mechanism automatically realizes the accurate measurement of the inclination angle of the test platform, which makes the operation more convenient, reduces the intervention of manual operation on the measurement results, and further improves the measurement accuracy of the pipeline static friction coefficient.

Description

A device and method for testing the coefficient of static friction of pipelines

technical field

The invention relates to the field of electric pipeline testing, and more specifically, to a pipeline static friction coefficient testing device and method.

Background technique

Power pipelines are often used in long-distance infrastructure such as communication transmission, providing an important guarantee for buried cables and optical fibers. Power pipelines are usually made of high-density polyethylene silicon, which has the advantages of stable and reliable performance and low price. However, the static friction coefficient of the pipeline is an important performance index for the detection and evaluation of power pipelines.

There are two general methods for testing the coefficient of static friction of pipes: the tension method and the plate method. The plate method is to place the standard test rod in the horizontal pipe to be tested, and slowly adjust the inclination angle of the pipe. When the angle reaches a certain value, displacement will occur due to the influence of gravity of the standard test rod. The static friction of the communication pipe can be calculated through this inclination angle. coefficient. Compared with the tension method, the flat plate method is simpler and more intuitive, so it is recommended to use the flat plate method in most standards and test methods, and most of the pipe static friction coefficient testers on the market are made by the flat plate method.

However, the existing test equipment on the market needs to manually put the test rod back into the pipeline to be tested every time it is tested, and the placement position of the test rod will be different, thus affecting the accuracy of the test results.

Contents of the invention

(1) Technical problems to be solved

Embodiments of the present invention provide a pipeline static friction coefficient test device and method to solve the problem that the measurement accuracy is affected by artificially placed test rods in inconsistent positions during the existing pipeline static friction coefficient test process.

(2) Technical solutions

In order to solve the above technical problems, according to the first aspect of the embodiments of the present invention, a pipeline static friction coefficient test device is provided, including a base, a test platform, an angle adjustment mechanism, an adsorption component, a limit switch and an angle measurement component. The test platform Placed horizontally on the base, one end of the test platform is hinged to the base, the test platform is provided with a pipeline positioning part for placing the pipeline to be tested, the angle adjustment mechanism is installed on the base, the The output end of the angle adjustment mechanism is connected to the bottom of the test platform, the adsorption part is installed between the pipe positioning part and the free end of the test platform, the adsorption part includes an adsorption unit, and the adsorption unit Corresponding to the pipeline positioning component, it is used to absorb the test rod placed in the pipeline to be tested; the limit switch is installed between the adsorption unit and the pipeline positioning component; the angle measurement component is installed On the test platform, both the angle adjustment mechanism and the angle measurement component are electrically connected to the limit switch.

Further, the pipe static coefficient of friction test device also includes a reset assembly, the reset assembly is installed on the base and is close to the hinged end of the test platform;

The reset assembly is arranged corresponding to the pipeline positioning part, and is used to push the test rod in the pipeline to be tested to contact with the adsorption unit.

Further, the reset assembly includes: a bracket, a cylinder and a push rod, the bottom of the bracket is fixed on the base, the cylinder is installed horizontally on the top of the bracket, and the push rod is connected with the piston of the cylinder and towards the pipeline to be tested; when the pipeline to be tested is horizontal, the push rod is arranged coaxially with the test rod in the pipeline to be tested.

Further, the pipeline positioning component is a pneumatic clamp, and the pneumatic clamp includes a first pneumatic clamp and a second pneumatic clamp, the first pneumatic clamp is arranged opposite to the second pneumatic clamp, and the first pneumatic clamp is close to the hinged end of the test platform;

The limit switch is arranged on the outer wall of the second pneumatic clamp, and the adsorption unit is arranged correspondingly to the bayonet of the second pneumatic clamp;

A stepping motor is installed on the test platform, and the output end of the stepping motor is connected with the first pneumatic clamp or the second pneumatic clamp.

Further, the test rod is a magnetic rod, and the adsorption unit is an electromagnet.

Further, the angle adjustment mechanism specifically includes: a servo motor, a connecting rod, a lead screw and a lead screw nut matched with the lead screw, the servo motor is horizontally installed on the base, and one end of the lead screw is connected to the servo motor The other end of the lead screw is connected to the base in rotation, the lower end of the connecting rod is hinged to the screw nut, and the upper end of the connecting rod is hinged to the bottom of the test platform.

Further, the pipe static friction coefficient testing device also includes a control box, the control box includes a control unit, a data calculation unit and a display unit, and the angle measurement unit, limit switch, reset assembly, stepping motor and adsorption unit are all It is electrically connected with the control part, and both the data calculation part and the display part are electrically connected with the control part.

According to the second aspect of the present invention, a method for testing the coefficient of static friction of pipelines is provided, using the device for testing the coefficient of static friction of pipelines described in the first aspect of the embodiments of the present invention, including:

S1, adjust the level of the test platform, and install the pipeline to be tested on the pipeline positioning component;

S2, placing a test rod in the pipeline to be tested, and bringing the test rod into adsorption contact with the adsorption unit;

S3, the adsorption unit is released, the angle adjustment mechanism acts and drives the free end of the test platform to rise, when the test rod slides down and triggers the limit switch, the angle adjustment mechanism is controlled to stop, and at the same time, the angle is measured The component measures the inclination angle of the test platform;

S4. Calculate and obtain the static friction coefficient of the pipeline to be tested according to the inclination angle of the test platform when the test rod slides down.

Further, S5 is also included after the S4, and the S5 specifically includes:

The stepping motor is used to drive the pneumatic clamp and the pipeline to be tested to rotate at a preset angle, and the above steps S1-S4 are repeatedly executed.

Further, said S2 specifically includes:

The test rod is put into the pipe to be tested from the end of the pipe to be tested away from the adsorption unit, and the reset component is used to push the test rod to be in adsorption contact with the adsorption unit.

(3) Beneficial effects

The pipe static friction coefficient test device and method provided by the embodiments of the present invention, the test device can make the initial sliding position of the test rod consistent by arranging the adsorption parts at the corresponding positions of the pipe positioning parts, and improve the accuracy of the measurement results. The linkage control of the limit switch, the angle detection part and the angle adjustment mechanism automatically realizes the accurate measurement of the inclination angle of the test platform, which makes the operation more convenient, reduces the intervention of manual operation on the measurement results, and further improves the measurement accuracy of the static friction coefficient of the pipeline.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of pipeline static friction coefficient testing device in the embodiment of the present invention;

Fig. 2 is the circuit connection schematic diagram of pipeline static friction coefficient testing device in the embodiment of the present invention;

Fig. 3 is the flowchart of pipeline static friction coefficient test method in the embodiment of the present invention;

In the figure: 1. base; 2. angle adjustment mechanism; 3. adsorption component; 4. limit switch; 5. first pneumatic fixture; 6. test platform; 7. angle measurement component; 8. pipeline to be tested; 9. The second pneumatic fixture; 10, stepping motor; 11, reset assembly; 12, test rod; 21, servo motor; 22, lead screw; 23, lead screw nut; 24, connecting rod; 111, bracket; 112, cylinder; 113, push rod.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1 and Figure 2, the embodiment of the present invention provides a pipe static friction coefficient test device, including: a base 1, a test platform 6, an angle adjustment mechanism 2, an adsorption component 3, a limit switch 4 and an angle measurement component 7, In the initial state, the test platform 6 is placed horizontally on the base 1, and one end of the test platform 6 is hinged to the base 1. Specifically, a hinge support can be provided on the base 1, and the test platform 6 is connected to the transfer support to realize the hinge. For ease of description, the hinged end of the test platform 6 and the base 1 is a hinged end, and the movable end of the test platform 6 is a free end.

Wherein, the test platform 6 is equipped with a pipeline positioning part, which is used to place the pipeline 8 to be tested, and can position the pipeline 8 to be tested; according to the test requirements, the arrangement direction of the pipeline positioning components is along the hinged end of the test platform 6 It is arranged toward the free end of the test platform 6, so as to facilitate the placement of the pipeline 8 to be tested and related tests.

The angle adjustment mechanism 2 is installed on the base 1, and the output end of the angle adjustment mechanism 2 is connected with the bottom of the test platform 6, thereby driving the free end of the test platform 6 to rise and fall. Specifically, the angle adjustment mechanism can adopt a gear transmission mode, a hydraulic rod push-pull mode, or a cooperation mode between the screw 22 and the connecting rod 24 to realize the inclination adjustment of the test platform 6 .

Specifically, the adsorption component 3 is installed between the pipe positioning component and the free end of the test platform 6, wherein the adsorption component 3 specifically includes an adsorption unit and a fixed support, the fixed support is fixed on the test platform 6, and the adsorption unit is installed on the fixed On the support, so that the height of the adsorption unit is close to the height of the pipeline positioning part, the adsorption unit and the pipeline positioning part are arranged correspondingly, and are used to absorb the test rod 12 placed in the pipeline 8 to be tested, so as to ensure the initial slide of the test rod 12 The location is consistent to improve the accuracy of test results. Of course, the adsorption unit can also be made into a component with a certain height, which can be directly installed on the test platform 6 .

It should be noted that the specific distance between the adsorption part 3 and the pipe positioning part can be adapted and adjusted according to the specific length of the test rod 12, which is generally 2 cm to 5 cm. The adsorption unit can be adsorbed by a vacuum component or an electromagnet. When the electromagnet is used for adsorption, the corresponding test rod 12 is a magnetically conductive rod made of a magnetically conductive material such as iron, nickel or cobalt.

In the above embodiment, in order to automatically determine the inclination angle of the test platform 6 when the test rod 12 starts to slide down, the angle measuring component 7 and the limit switch 4 are added in this embodiment. Specifically, the angle measurement component 7 is installed on the test platform 6 for measuring the inclination angle of the test platform 6 . Specifically, the angle measuring component 7 can use electronic equipment or components such as an electronic angle measuring instrument or an angle measuring sensor to quickly acquire angle data to be measured.

In this embodiment, linkage detection is realized by adding a limit switch 4, the limit component is electrically connected to the angle adjustment structure, and is also electrically connected to the control component of the angle adjustment mechanism 2, so that when the limit switch 4 is triggered, the angle The adjustment mechanism 2 stops working, and the inclination angle of the test platform 6 is measured by the angle measuring component 7 at the same time.

The limit switch 4 is installed between the adsorption unit and the pipe positioning part, specifically, it can be installed on the pipe positioning part near the end of the adsorption part 3, so that the test rod 12 can trigger its switch. When the test rod 12 passes through the limit switch 4, the limit switch 4 can be set as normally open or normally closed. When the test rod 12 slides away from the travel switch, the travel switch action is triggered, and the corresponding switch is normally closed or normally open. As long as the switching signal is switched, the corresponding angle adjustment mechanism 2 can be triggered to stop and the angle detection component can detect the inclination angle, and the static friction coefficient of the pipeline 8 to be tested can be further obtained through the detected inclination angle.

The pipe static friction coefficient testing device provided by the embodiment of the present invention can make the initial sliding position of the test rod 12 consistent by arranging the adsorption parts at the corresponding positions of the pipe positioning parts, and improve the accuracy of the measurement results. The linkage control of the detection parts and the angle adjustment mechanism automatically realizes the accurate measurement of the inclination angle of the test platform 6, which makes the operation more convenient, reduces the intervention of manual operation on the measurement results, and further improves the measurement accuracy of the pipeline static friction coefficient.

On the basis of the above-mentioned embodiments, according to the requirements of the pipeline static friction coefficient test specification, it is necessary to repeat the measurement of the static friction coefficient at different positions of the pipeline multiple times, and eliminate the influence of errors, so as to obtain high-precision test results. For this reason, in this embodiment, in order to further eliminate the impact of human factors on the measurement results, and save manpower, a reset assembly 11 is installed on the base 1. The reset assembly 11 is specifically installed near the hinged end of the test platform 6, and the reset assembly 11 and The pipe positioning parts are arranged correspondingly so that the reset assembly 11 automatically pushes the test rod 12 in the pipe 8 to be tested inward, and is used to push the test rod 12 in the pipe 8 to be tested to the adsorption unit.

On the basis of the above embodiments, further, the reset assembly 11 specifically includes: a bracket 111, a cylinder 112 and a push rod 113, the bottom of the bracket 111 is fixed on the base 1, and the cylinder 112 is horizontally installed on the top of the bracket 111, through The design of the height of the support 111 ensures that the cylinder 112 is set correspondingly to the pipeline 8 to be tested. The cylinder 112 can reciprocate along the horizontal direction, and the ejector rod 113 is also arranged horizontally. One end of the ejector rod 113 is connected with the piston of the cylinder 112, and the other end of the ejector rod 113 faces the pipeline 8 to be tested, and the ejector rod 113 is driven by the piston of the cylinder 112 For reciprocating motion, the push rod 113 is arranged coaxially with the test rod 12 placed inside when the pipe 8 to be tested is horizontal, so that when the push rod moves into the pipe 8 to be tested, it can push the test rod 12 toward the direction of the adsorption component 3 .

On the basis of the above-mentioned embodiments, in order to facilitate the positioning of the pipe to be tested 8 and to facilitate the rotation of the pipe to be tested at an accurate angle, the pipe positioning part in the embodiment of the present invention specifically adopts a pneumatic clamp, which is a conventional clamp Components, commonly found in machining equipment, have a bayonet in the middle and can rotate axially.

Specifically, the pneumatic clamp includes a first pneumatic clamp 5 and a second pneumatic clamp 9, the first pneumatic clamp 5 is opposite to the second pneumatic clamp, and the two ends of the pipeline 8 to be tested are respectively controlled by the first pneumatic clamp 5 and the second pneumatic clamp. Pneumatic clamp 9 is added. Wherein, the first pneumatic clamp 5 is close to the hinged end of the test platform 6, the second pneumatic clamp 9 is close to the free end of the test platform 6, the center of the bayonet of the first pneumatic clamp 5 and the center of the bayonet of the second pneumatic clamp 9 on the same horizontal line. And the limit switch 4 can be arranged on the outer sidewall of the second pneumatic clamp 9, and the bayonet of the adsorption unit and the second pneumatic clamp 9 is set correspondingly, guarantees that the test rod 12 placed in the pipeline 8 to be tested can be contacted with the adsorption unit and is adsorbed.

On the basis of the above-mentioned embodiments, in order to accurately control the rotation angle of the bayonet of the pneumatic clamp, a stepper motor 10 is installed on the test platform 6 in this embodiment, and the output end of the stepper motor 10 is connected to one of the pneumatic clamps That is, when the stepping motor 10 drives the first pneumatic clamp 5 or the second pneumatic clamp 9 to rotate, the first pneumatic clamp 5 and the second pneumatic clamp 9 will rotate synchronously due to the connection of the pipes to be tested.

On the basis of the above-mentioned embodiments, in order to accurately control the inclination angle of the test platform 6 , the angle adjustment mechanism 2 in this embodiment is realized by a structure in which a screw 22 cooperates with a connecting rod 24 . Angle adjustment mechanism 2 specifically comprises: servo motor 21, connecting rod 24, leading screw 22 and the leading screw nut 23 that cooperates with leading screw 22, servo motor 21 is installed on the base 1, leading screw 22 horizontal arrangement, one end is connected with servo motor 21 The output end is connected, and the other end is connected with the test platform 6 and the hinged support on the base 1, and a bearing is installed on the hinged support to facilitate the rotation of the screw 22. The lead screw nut 23 cooperates with the lead screw 22 to convert the rotary motion of the lead screw 22 into the linear motion of the lead screw nut 23 . Connecting rod 24 is used as the output end of angle adjustment mechanism 2, and its lower end is hinged with lead screw nut 23, and its upper end is hinged with the bottom of test platform 6, and the hinged position of connecting rod 24 lower end and test platform 6 should be close to the hinge of test platform 6 as far as possible end.

Through the forward rotation or reverse rotation of the lead screw 22, the reciprocating motion of the lead screw nut 23 is driven, and then the change of the angle of the connecting rod 24 is driven, and the raising and lowering control of the test platform 6 is realized by controlling the speed of the servo motor 21 . The controller of the servo motor 21 is connected with the limit switch 4, so that the limit switch 4 is touched when the test rod 12 slides down to control the servo motor 21 to stop working, thereby reducing the impact on the measurement accuracy of the inclination angle.

On the basis of the above-mentioned embodiments, in order to realize the automatic operation of the test device, the pipeline static friction coefficient test device in the embodiment of the present invention also includes a control box, which controls the operation and display of the entire device. The control box includes control components, which can be single-chip microcomputer, embedded controller or PLC (programmable logic controller), angle measurement component 7, limit switch 4, reset component 11, stepper motor 10 and adsorption unit The components are electrically connected, the control component is used to obtain the angle of the test platform 6 when the test rod 12 slides down, and the control component is also used to control the on-off of the adsorption unit (using an electromagnet in this embodiment) and switch control according to the signal of the limit switch 4 The rotation of the stepper motor 10. The control part is also used to control the reciprocating movement of the cylinder of the reset assembly 11, so that it is convenient to push the test rod 12 back to the adsorption part 3 for reset setting without manual operation.

Further, the control box in the embodiment of the present invention also includes a data calculation unit and a display unit, both of which are connected to the control unit, and the data calculation unit can be realized by using a conventional programmable calculation chip, which is used to The inclination angle of the test platform 6 obtained by the control component is converted into the static friction coefficient of the pipeline 8 to be tested, and specifically, a corresponding calculation program can be built into the data calculation component. The display part can be a display, or a separate liquid crystal display installed on the control cabinet. The display part is used to display the inclination angle of the test platform 6 during each measurement, and then the data calculation part is converted according to the static friction coefficient of the corresponding inclination angle. The display enables the operator to visually view the measurement results.

On the basis of the above-mentioned embodiments, as shown in Figure 3, the embodiment of the present invention also provides a method for testing the coefficient of static friction of pipelines, using the device for testing the coefficient of static friction of pipelines described in the above-mentioned embodiments to perform related tests, specifically The test steps include:

S1, adjust the level of the test platform 6, and install the pipeline 8 to be tested on the pipeline positioning component;

S2, placing the test rod 12 in the pipeline 8 to be tested, and bringing the test rod 12 into adsorption contact with the adsorption unit;

S3, the adsorption unit is released, the angle adjustment mechanism 2 acts and drives the free end of the test platform 6 to rise, when the test rod 12 slides down and triggers the limit switch 4, the angle adjustment mechanism 2 is controlled to stop, and the angle measurement is obtained at the same time The angle of the test platform 6 detected by the component 7;

S4, according to the angle of the test platform 6 when the test rod 12 slides down, calculate the static friction coefficient of the pipeline 8 to be tested.

Specifically, in S1, in order to ensure the accuracy of the test results, the test platform 6 needs to be adjusted to a horizontal position before each test as a reference for each measurement. After the horizontal adjustment of the test platform 6 is completed, the pipeline to be tested 8 is installed on the pipeline positioning component for installation and positioning for subsequent testing. The pipe positioning part can adopt a pneumatic clamp, which is easy to operate, and at the same time can perform axial positioning of the pipeline 8 to be tested, and the pneumatic clamp can also meet the rotation requirements of the subsequent test.

In S2, the test rod 12 needs to be placed in the pipeline 8 to be tested before the test, the test rod 12 is inserted into the pipeline 8 from the end of the pipeline 8 to be tested away from the adsorption part 3, and the end of the test rod 12 is pushed To be in contact with the adsorption unit, the adsorption unit can use an electromagnet, and the test rod 12 can use a magnetic rod, such as an iron rod, a nickel rod or a cobalt rod, etc., and the performance of the magnetic rod and the electromagnet can be used to facilitate the realization of the test rod 12. Adsorption and separation from the adsorption unit facilitate initial positioning of the test rod 12 .

Further, in order to facilitate the placement of the test rod 12, the reset assembly 11 can be used to automatically push the test rod 12 into contact with the adsorption component 3 every time. into the pipeline 8 to be tested, and the reset assembly 11 is used to push the test rod 12 into adsorption contact with the adsorption unit. Certainly, during the follow-up cycle test, it is not necessary to think about repositioning, and the reset of the test rod 12 can be realized only by operating the push rod of the reset component 11, and it can be guaranteed that the test rod 12 can start to slide down from the same position every time.

In S3 , the release of the adsorption unit is controlled so that it is separated from the test rod 12 . Then operate the angle adjustment mechanism 2 to make the free end of the test platform 6 rise slowly at a predetermined speed. When the test rod 12 slides down, the limit switch 4 is triggered, and the limit switch 4 controls the angle adjustment mechanism 2 to stop. The measuring part 7 measures the inclination angle of the test platform 6 at this time.

In S4, according to the inclination angle of the test platform 6 when the test rod 12 slides down, the corresponding coefficient of static friction can be calculated according to the relevant calculation formula. Concrete calculation process can be to carry out directly in corresponding data calculation part, and built-in calculation program in the processing part, by angle measurement part 7, the inclination angle data is directly delivered to in the data calculation part to calculate, also can measure to angle measurement part 7 The obtained inclination angle value is displayed and stored, and then calculated by other means to obtain the static friction coefficient of the pipeline 8 to be tested.

On the basis of the above-mentioned embodiment, S5 is also included after the above-mentioned S4, and the above-mentioned S5 specifically includes: using the stepping motor 10 to drive the pneumatic clamp and the pipe 8 to be tested to rotate at a predetermined angle together, and repeatedly performing the above-mentioned steps S1-S4 .

Specifically, in order to increase the accuracy of the pipeline static friction coefficient test, the existing test specifications need to test the same pipeline 8 tests for a total of 8 times, remove the measurement results with large errors, and then take the average value to obtain the final static friction of the pipeline coefficient.

Simultaneously, in order to be able to detect every position of the inner wall of the pipeline 8 to be tested as much as possible, the pipeline 8 to be tested needs to be rotated by a certain angle during each test. In the present embodiment, each rotation is required to be 45 degrees according to the number of tests. After the first test, it needs to be rotated 7 times, and the corresponding static friction coefficient can be obtained by performing the test according to the steps S1-S3 in the above embodiment each time. Finally, data processing is performed according to the measured 8 static friction coefficient results, and the final test result of the pipeline static friction coefficient can be obtained. In order to facilitate rotation by a predetermined angle, in this embodiment, the stepper motor 10 is used to drive the pneumatic clamp to rotate by a preset angle, thereby driving the pipe to be tested 8 on the pneumatic clamp to rotate by a preset angle.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A pipe static coefficient of friction testing device, comprising a base, a test platform and an angle adjustment mechanism, the test platform is horizontally placed on the base, one end of the test platform is hinged with the base, and the test platform is provided with There is a pipeline positioning part for placing the pipeline to be tested, the angle adjustment mechanism is installed on the base, the output end of the angle adjustment mechanism is connected to the bottom of the test platform, and it is characterized in that it also includes: An adsorption part, the adsorption part is installed between the pipe positioning part and the free end of the test platform, the adsorption part includes an adsorption unit, and the adsorption unit is correspondingly arranged with the pipe positioning part for the adsorption position a test rod in the pipeline to be tested; a limit switch, the limit switch is installed between the adsorption unit and the pipeline positioning component; An angle measurement component is installed on the test platform, and both the angle adjustment mechanism and the angle measurement component are electrically connected to the limit switch. 2. The pipeline static friction coefficient testing device according to claim 1, further comprising a reset assembly, the reset assembly is installed on the base and is close to the hinged end of the test platform; The reset assembly is arranged corresponding to the pipeline positioning part, and is used to push the test rod in the pipeline to be tested to contact with the adsorption unit. 3. The pipeline static friction coefficient testing device according to claim 2, wherein the reset assembly comprises: a bracket, a cylinder and a push rod, the bottom of the bracket is fixed on the base, and the cylinder is horizontally installed on the The top of the bracket, the push rod is connected with the piston of the cylinder and faces the pipeline to be tested; when the pipeline to be tested is horizontal, the push rod is coaxial with the test rod in the pipeline to be tested layout. 4. The pipeline static friction coefficient testing device according to claim 2, wherein the pipeline positioning component is a pneumatic clamp, and the pneumatic clamp comprises a first pneumatic clamp and a second pneumatic clamp, and the first pneumatic clamp and The second pneumatic clamp is arranged oppositely, and the first pneumatic clamp is close to the hinged end of the test platform; The limit switch is arranged on the outer wall of the second pneumatic clamp, and the adsorption unit is arranged correspondingly to the bayonet of the second pneumatic clamp; A stepping motor is installed on the test platform, and the output end of the stepping motor is connected with the first pneumatic clamp or the second pneumatic clamp. 5 . The pipeline static friction coefficient testing device according to claim 4 , wherein the test rod is a magnetic rod, and the adsorption unit is an electromagnet. 6. The pipe static friction coefficient testing device according to claim 4 or 5, wherein the angle adjustment mechanism specifically comprises: a servo motor, a connecting rod, a lead screw and a lead screw nut matched with the lead screw, the The servo motor is installed horizontally on the base, one end of the screw is connected to the output end of the servo motor, the other end of the screw is connected to the base in rotation, and the lower end of the connecting rod is hinged to the screw nut , the upper end of the connecting rod is hinged to the bottom of the test platform. 7. pipeline static friction coefficient testing device according to claim 6, is characterized in that, also comprises control box, and described control box comprises control part, data calculation part and display part, and described angle measuring part, limit switch, reset The assembly, the stepping motor and the adsorption unit are all electrically connected to the control part, and the data calculation part and the display part are all electrically connected to the control part. 8. A pipeline static friction coefficient testing method, utilizing the pipeline static friction coefficient testing device as described in any one of claims 1 to 7, characterized in that, comprising: S1, adjust the level of the test platform, and install the pipeline to be tested on the pipeline positioning component; S2, placing a test rod in the pipeline to be tested, and bringing the test rod into adsorption contact with the adsorption unit; S3, the adsorption unit is released, the angle adjustment mechanism acts and drives the free end of the test platform to rise, when the test rod slides down and triggers the limit switch, the angle adjustment mechanism is controlled to stop, and the angle measurement is used to measure The component measures the inclination angle of the test platform; S4. Calculate and obtain the static friction coefficient of the pipeline to be tested according to the inclination angle of the test platform when the test rod slides down. 9. pipeline static friction coefficient testing method according to claim 8, is characterized in that, also comprises S5 after described S4, and described S5 specifically comprises: The stepper motor is used to drive the pneumatic clamp and the pipeline to be tested to rotate at a preset angle, and the above steps S1 to S4 are repeatedly executed. 10. pipeline static friction coefficient test method according to claim 8, is characterized in that, described S2 specifically comprises: The test rod is put into the pipe to be tested from the end of the pipe to be tested away from the adsorption unit, and the reset component is used to push the test rod to be in adsorption contact with the adsorption unit.