Falling impact load test method and device for conductor spacer system of power transmission line

Abstract

The invention relates to a falling impact load test method and device for a conductor spacer system of a power transmission line. The device comprises a supporting column, a hoop, a connecting set, a wire, a spacer, a mass object, a safety rope, an electric hoist, an adjustable detacher, a fixing plate, a hoop connecting plate, a bolt, a U-shaped ring, a sensor, a turn buckle, a wedge-shaped wire clamp and a dynamic signal acquisition instrument. The left supporting column, the right supporting column and the middle supporting column are each provided with two hoops, and the two ends of the four wires are connected with the hoops of the left supporting column and the right supporting column through connecting sets. The connecting group is composed of a wire clamp, a turn buckle and a sensor and is connected to the hoop through a U-shaped ring. The middle supporting column is located between the left supporting column and the right supporting column, and the electric hoist is fixed to the middle supporting column through a fixing plate and a hoop and connected with the mass object through an adjustable detacher. The spacer is located at the middle supporting column and in the middle of the four wires, connects the four wires into a whole, and is connected with the mass object through the safety rope.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission equipment construction safety testing, and in particular to a falling impact load testing method and device for a transmission line conductor spacer system. Background Art

[0002] With the continuous advancement of modern construction engineering technology, aerial work and vertical transportation are increasingly used in the construction industry. As an important equipment for aerial work and vertical transportation, the safety and reliability of vertical stranded steel track are directly related to the life safety of operators and the smooth progress of the project. In actual use, the fall protection system needs to withstand various complex external factors and also deal with sudden fall impact loads. Therefore, carrying out fall impact load tests on the fall protection system is an important means to ensure its stable and reliable performance.

[0003] At present, the methods and devices for the drop impact load test of the transmission line conductor spacer system on the market are still imperfect. Traditional test methods are often limited to simple static load tests or low-impact dynamic tests, and cannot truly simulate the complex environment and impact force of a high-altitude fall. In addition, the existing test devices also have problems such as complex structure, inconvenient operation, and low test accuracy, which are difficult to meet the needs of actual projects. Summary of the invention

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a drop impact load test method and device for a transmission line conductor spacer system, which can carry out drop impact tests with different drop heights and different preload forces, and obtain test results of conductors and spacers at different drop heights and different preload forces.

[0005] In order to achieve the above object, the present invention is implemented by adopting the following technical solutions: A method and device for a falling impact load test of a transmission line conductor spacer system, characterized in that it comprises: a support column, a clamp, a connection group, a conductor, a spacer, a mass object, a safety rope, an electric hoist, an adjustable unhooker, a fixing plate, a clamp connection plate, a bolt, a U-shaped ring, a sensor, a basket bolt, a wedge-shaped wire clamp, and a dynamic signal acquisition instrument; The support column comprises a left support column, a middle support column and a right support column. Each of the left support column, the right support column and the middle support column is respectively equipped with two clamps. The two ends of the four wires are connected to the clamps of the left support column and the right support column through a connection group. The middle support column is located between the left and right support columns and can be biased to the left or the right. The electric hoist is fixed in the middle through a fixing plate and a clamp and is connected to the mass through an adjustable unhooking device; The spacer is located at the middle support column and between the four conductors, and connects the four conductors as a whole, and is connected to the mass through a safety rope; Sensors are installed at the electric hoist, the end of the wire and the end of the safety rope. The dynamic signal collector collects information from the sensors of the electric hoist, the end sensors of the wire and the end sensors of the safety rope in a wireless manner. Furthermore, the connection group is connected to the clamp connection plate via a U-shaped ring.

[0006] Furthermore, the clamp and the clamp connecting plate are connected by welding.

[0007] Furthermore, the length of the fixing plate is greater than 0.8 m, ensuring that the mass does not contact the supporting column during the test process.

[0008] Furthermore, the distance between the support columns on the left and right sides is greater than 50m.

[0009] Furthermore, the acquisition frequency of the dynamic signal acquisition instrument is greater than 10 kHz.

[0010] Furthermore, the weight of the mass object is 100 kg.

[0011] Furthermore, the spacing between the upper and lower clamps is equal to the vertical spacing between the wires.

[0012] Furthermore, the distance between the connection bolts on the clamp connection plate is equal to the horizontal spacing between the wires.

[0013] The working principle of the test device of the present invention is as follows: The adjustable unhooker is controlled by an electric hoist to descend to the position of the mass object; after the experimenter fixes the adjustable unhooker and the mass object relatively, the electric hoist grabs the mass object and lifts it to the specified height; at the same time, the dynamic signal acquisition instrument collects the lifting height of the electric hoist to ensure accuracy.

[0014] Beneficial effects of the present invention: The method and device for the falling impact load test of the transmission line conductor spacer system of the present invention can truly simulate the high-altitude falling environment and accurately test the falling impact load test of the transmission line conductor spacer system, which is of great significance for improving the performance of the anti-fall system and ensuring the safety of high-altitude operations. It not only helps to promote the technological progress of the construction industry, but also provides a scientific basis for the formulation of relevant standards and promotes the healthy development of the entire industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 Schematic diagram of the test device of the present invention; Figure 2 Detailed drawing of the central support column of the experimental device of the present invention; Figure 3 Detailed drawing of the clamp of the experimental device of the present invention; Figure 4 Detailed diagram of the connection group of the experimental device of the present invention.

[0016] In the figure: 1-1, right support column; 1-2, left support column; 1-3, middle support column; 2-1, upper clamp on the right; 2-2, lower clamp on the right; 2-3, upper clamp on the left; 2-4, lower clamp on the left; 2-5, upper clamp on the middle; 2-6, lower clamp on the middle; 201, clamp 1; 202, bolt; 203, clamp connecting plate; 204, connecting bolt hole 205, clamp 2; 3, connection group; 301, U-shaped ring; 302, wire end sensor; 303, basket bolt; 304, wedge-shaped wire clamp; 4, wire; 5, spacer rod; 6, mass; 7, safety rope; 8, electric hoist; 9, adjustable unhooking device; 10, fixing plate; 11 dynamic signal collector; 12, safety rope end sensor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0020] Example 1

[0021] See attached Figures 1 to 4The present embodiment provides a method and device for a falling impact load test of a transmission line conductor spacer system, comprising a right support column, a clamp, a clamp 1 201, a bolt 202, a clamp connection plate 203, a connection bolt hole 204, a clamp 2 205, a connection group 3, a conductor 4, a spacer 5, a mass 6, a safety rope 7, an electric hoist 8, an adjustable unhooker 9, a fixing plate 10, a dynamic signal collector 11 and a safety rope end sensor 12;

[0022] The support column includes a right support column 1-1, a left support column 1-2, and a middle support column 1-3. The hoop includes a right upper hoop 2-1, a right lower hoop 2-2, a left upper hoop 2-3, a left lower hoop 2-4, a middle upper hoop 2-5, and a middle lower hoop 2-6. The hoop is composed of a hoop 1 201, a bolt 202, a hoop connecting plate 203, a connecting bolt hole 204, and a hoop 2 205. The connection group includes a U-shaped ring 301, a wire end sensor 302, a basket bolt 303, and a wedge-shaped wire clamp 304. The electric hoist 8 is fixed to the middle support column 1-3 through a fixing plate 10 and is located on the upper side of the conductor 4; The upper side of the adjustable unhooker 9 is connected to the electric hoist 8, and the lower side is used to grab the mass 6; The two ends of the wire 4 are respectively connected to the left support column 1-2 and the right support column 1-1 through the connection group 3 and the clamp; The spacer rod 5 and the mass object 6 are connected by a safety rope 7, and a safety rope end sensor 12 is installed between them; The wire end sensor 302, the safety rope end sensor 12 and the sensor of the electric hoist 8 are electrically connected to the dynamic signal collector 11, and transmit signals to and from the dynamic signal collector 11; Furthermore, the connection group 3 is connected to the clamp connection plate 203 via a U-shaped ring.

[0023] Furthermore, the clamp and the clamp connecting plate are connected by welding.

[0024] Furthermore, the length of the fixing plate is greater than 0.8 m, ensuring that the mass does not contact the supporting column during the test process.

[0025] Furthermore, the distance between the support columns on the left and right sides is greater than 50m.

[0026] Furthermore, the acquisition frequency of the dynamic signal acquisition instrument is greater than 10 kHz.

[0027] Furthermore, the weight of the mass object is 100 kg.

[0028] Furthermore, the spacing between the upper and lower clamps is equal to the vertical spacing b of the wires.

[0029] Furthermore, the distance between the connecting bolts on the clamp connecting plate is equal to the horizontal spacing a of the wires.

[0030] In this embodiment, the dimensions of the fixing plate 10 are 440 mm in length, 220 mm in width, and 10 mm in thickness, and the material is Q355 steel; the remaining equipment is conventional technical equipment.

[0031] Example 2

[0032] The present invention also provides a method for detecting a falling impact load using the detection device, and the specific steps are as follows: S1, before the experiment starts, the same pre-tightening force is applied to the wire 4 through the turnbuckle bolt 303, and the dynamic signal acquisition instrument 11 collects the data of the wire end sensor 302, and records it as the initial value F of the pre-tightening force of the turnbuckle bolt 303 on the wire 4. F can be 1kN, 5kN, 10kN, etc., and must meet the suspension requirements of the wire; S2, after debugging the electric hoist 8 to the set position, the adjustable unhooker 9 is connected to the mass 6; the electric hoist 8 lifts the mass 6, and the dynamic signal collector 11 collects the lifting height of the electric hoist 8 and records it as the falling height H, which can be 0.5m, 1.0m, 1.5m, 2.0m, etc., in accordance with the actual falling situation of the operator; S3, at the beginning of the experiment, the electric hoist 8 controls the adjustable unhooking device 9 to release the mass 6, and the dynamic signal collector 11 collects the data of the wire end sensor 302 during the falling process of the mass 6, and records it as the impact load F1 received by the wire 4; the dynamic signal collector 11 collects the data of the safety rope end sensor 12 during the falling process of the mass 6, and records it as the maximum impact load F2 received by the mass 6; S4, by collecting the falling height H of the mass 6 lifted by the electric hoist 8 and the preload force F applied by the turnbuckle bolt 303 to the wire 4, the experimental results of the wire 4 and the mass 6 under different falling heights H and different preload forces F can be obtained.

[0033] S5, adjusting the position of the safety rope 7 fixed on the conductor 4, and obtaining test results under different falling conditions.

[0034] Furthermore, in step S4, while keeping the initial preload force F unchanged, different falling height H experiments are carried out on the wire 4, and the value is recorded in time. Correspondingly, the test is carried out according to the above method, and the impact load results of the wire end sensor 302 and the safety rope end sensor 12 are recorded.

[0035] Furthermore, in step S4, different initial preload force F values ​​are adjusted, and different falling height H experiments are carried out for the wires corresponding to each F value, and the values ​​are recorded in time. Correspondingly, the test is carried out according to the above method, and the impact load results of the wire end sensor 302 and the safety rope end sensor 12 are recorded.

[0036] Furthermore, in step S5, the position of the safety rope 7 fixed on the conductor 4 is adjusted, and tests can be carried out under any working conditions, and the values ​​are recorded in time. Correspondingly, the test is performed according to the above method, and the impact load results of the conductor end sensor 302 and the safety rope end sensor 12 are recorded.

[0037] Furthermore, after the step S5 experiment is completed, the appropriate fixing position of the safety rope, the preload of the conductor during construction, and the spacing of the spacer bars are determined through the test phenomena and the obtained load data. The obtained data is analyzed, and based on the safety requirements of relevant specifications, an optimization scheme for the construction process of the conductor spacer bars is proposed. Taking the test results of the four-split conductor as an example, the details are as follows: Construction personnel should connect personal protective equipment to the upper conductor to reduce the fall height and reduce the load on the conductor and the human body. Personal protective equipment should be connected to two different conductors with double safety ropes as much as possible to avoid the rotation of the conductor during the fall. The pre-tightening force at the end of the conductor during construction can prevent loosening to avoid large horizontal load components caused by a fall.

[0038] It should be noted that the components and equipment used in the present invention are all known and can be directly obtained from the market, and are not homemade, so the specific structure is not described in detail in the present invention.

[0039] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A drop impact load test device for a transmission line conductor spacer system, characterized in that: include: Support column, clamp, connection group, wire, spacer, mass, safety rope, electric hoist, adjustable unhooking device, fixing plate, clamp connection plate, bolt, U-shaped ring, dynamic signal acquisition instrument; The support column comprises a left support column, a middle support column and a right support column. Each of the left support column, the right support column and the middle support column is respectively equipped with two clamps. Four wires are provided. Both ends of the four wires are connected to the clamps of the left support column and the right support column through a connection group. The middle support column is located between the left and right support columns. The electric hoist is fixed on the middle support column through a fixing plate and a clamp and connected to the mass through an adjustable unhooking device; The spacer connects the four conductors into a whole and is connected to the mass through a safety rope; Sensors are arranged at the electric hoist, the end of the wire and the end of the safety rope, and the dynamic signal collector collects information of the electric hoist sensor, the wire end sensor and the safety rope end sensor in a wireless manner.

2. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The connection group is composed of a wedge-shaped wire clamp, a basket bolt, and a wire clamp end sensor connected by a ring buckle and connected to the clamp by a U-shaped ring. Four wires are connected to the wedge-shaped wire clamp in the connection group.

3. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The spacer rod is located at the middle support column and in the middle of the four conductors and connects the conductors into a whole.

4. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The distance between the left supporting column and the right supporting column is greater than 50m.

5. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The adjustable unhooking device is installed on the lower side of the electric hoist.

6. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The mass object weighs 100 kg.

7. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The distance between the upper and lower clamps is equal to the vertical distance between the conductors, and the distance between the connecting bolts on the clamp connecting plate is equal to the horizontal distance between the conductors.

8. A drop impact load test device for a transmission line conductor spacer system according to claim 1, characterized in that: The dynamic signal collector is connected to all sensors by signals, and the acquisition frequency is greater than 10 kHz.

9. A test method using a drop impact load test device for a transmission line conductor spacer system according to any one of claims 1 to 8, characterized in that: The steps include: S1, before the experiment, the same preload force F is applied to the wire through the turnbuckle bolt, and the dynamic signal acquisition instrument collects the initial value of the preload force of the sensor at the end of the wire. F is 1kN, 5kN, and 10kN; S2, after debugging the electric hoist to the set position, connect the adjustable unhooker to the mass; the electric hoist lifts the mass, and the dynamic signal collector obtains the lifting height of the electric hoist and records it as the falling height H, where H is 0.5m, 1.0m, 1.5m, and 2.0m; S3, at the beginning of the experiment, the electric hoist controls the adjustable unhooking device to release the mass, and the dynamic signal acquisition instrument collects the sensor data at the end of the wire during the mass falling process, and records it as the maximum impact load F1 on the wire; the dynamic signal acquisition instrument collects the sensor data at the end of the safety rope during the mass falling process, and records the maximum impact load F2 on the mass; S4, by collecting the falling height H of the mass lifted by the electric hoist and the preload force F applied by the turnbuckle bolt to the wire, to obtain the experimental results of the wire and the mass under different falling heights H and different preload forces F; S5, adjust the position of the safety rope fixed on the conductor to obtain test results under different falling conditions.

10. The test method according to claim 9, characterized in that: In step S4, while keeping the initial preload force F unchanged, conduct experiments on the wire at different falling heights H, and record the values ​​in time. Correspondingly, test according to the above method and record the impact load results of the wire end sensor and the safety rope end sensor.

11. The test method according to claim 9, characterized in that: In step S4, different initial preload F values ​​are adjusted, and different fall height H experiments are carried out for the wires corresponding to each F value, and the values ​​are recorded in time. Correspondingly, the test is carried out according to the above method, and the impact load results of the wire end sensor and the safety rope end sensor are recorded.

12. The test method according to claim 9, characterized in that: In step S5, the position of the safety rope fixed on the conductor is adjusted to carry out the test under any working condition, and the value is recorded in time. Correspondingly, the test is carried out according to the above method, and the impact load results of the conductor end sensor and the safety rope end sensor are recorded. Through the test phenomenon and the obtained load data, the appropriate fixing position of the safety rope, the preload of the conductor during construction, and the spacing of the spacer bars are determined.

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