Mechanical property detection platform for railway overhead line system strut

Abstract

The utility model discloses a mechanical property detection platform for a railway contact net pillar, which relates to the technical field of railway contact nets and comprises a pillar mounting platform and a contact net pillar body, a steel ruler is arranged at the top end of the contact net pillar body, and an O-shaped hoop is arranged on the surface of the contact net pillar body. The tension direction is changed through the angle steel frame support and the fixed pulley block, a horizontal tension is further applied to the end of the contact net support body, the tension direction is changed through the angle steel frame support and the fixed pulley block, and a horizontal tension is further applied to the end of the contact net support body. Through multiple times of intermittent stretching of the chain block chain block, different forces are generated at the end part of the contact net pillar body, the deflection of the contact net pillar body is detected through the horizontal displacement of the steel ruler, and the stability of the pillar is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of railway contact network, in particular to a railway contact network pillar mechanical performance detection platform. Background Art

[0002] The overhead contact network is a high-voltage transmission line that is set up in a zigzag shape above the rails in an electrified railway and is used by the pantograph to draw current. The overhead contact network is the main structure of the railway electrification project. It is a special form of transmission line set up above the railway line to supply power to electric locomotives. It consists of contact suspension, support device, positioning device, pillars and foundation.

[0003] The end of the pillar is fixed by deep burial, but when the train is running, it will contact and rub against the contact network, causing a certain amount of vibration. The vibration is transmitted along the contact network to the pillar. If this continues for a long time, the end of the pillar is prone to loosening. In addition, the pillar is exposed to outdoor use, and the end of the pillar is eroded by rain for a long time, which is easy to wear and affect the stability of the pillar. However, the end of the pillar is buried in the ground. During daily maintenance, it is difficult to detect damage to the pillar, which affects the safe use of the contact network. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a platform for testing the mechanical properties of railway contact network pillars, which solves the problem that the ends of the pillars are eroded by rain for a long time, are easily worn, and affect the stability of the pillars. However, the ends of the pillars are buried in the ground, and it is difficult to detect damage to the pillars during daily maintenance, which affects the technical problem of safe use of the contact network.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A railway contact network pillar mechanical property testing platform comprises a pillar installation platform and a contact network pillar body, characterized in that a steel ruler is arranged at the top of the contact network pillar body, an O-shaped clamp is arranged on the surface of the contact network pillar body, a steel wire rope is arranged on the surface of the O-shaped clamp, and the contact network pillar body can be a contact network annular concrete pillar with a flange, a contact network annular steel pipe pillar, a contact network transverse rod pillar, or a contact network H-shaped steel pillar.

[0009] Preferably, an angle steel frame is provided on one side of the pillar mounting platform, and the angle steel frame is welded by four longitudinal angle steels and a plurality of transverse angle steels.

[0010] Preferably: a fixed pulley block is arranged on the surface of the angle steel frame.

[0011] Preferably: a ground anchoring end is provided on one side of the angle steel frame.

[0012] Preferably: a hand chain hoist fall chain is provided at one end of the ground anchor end, one end of the hand chain hoist fall chain is connected to the stress sensor through a U-shaped iron ring, and the other end is connected to the ground anchor end through a wire rope and a U-shaped iron ring.

[0013] Preferably, a stress sensor is provided on the surface of the fall chain of the hand hoist.

[0014] Preferably, the fixed pulley block comprises an angle steel frame formed by welding four sections of angle steel, a fixed pulley shaft, and a fixed pulley. There are two fixed pulleys, which only changes the direction of the steel wire rope but does not change the force value of the steel wire rope.

[0015] Preferably, the pillar installation platform is a reinforced concrete structure with five sets of screws embedded in advance for installing the contact network pillar body.

[0016] (III) Beneficial effects

[0017] 1. Change the pulling direction through the angle steel frame support and the fixed pulley set, and further apply a horizontal pulling force to the end of the contact network pillar body. Through multiple intermittent stretching of the hand chain hoist fall chain, the end of the contact network pillar body generates forces of different sizes. The deflection of the contact network pillar body is detected by the horizontal displacement of the steel ruler. When the upper limit force is applied by the hand chain hoist fall chain, observe whether the structure at the bottom of the contact network pillar body is damaged, and further judge whether the mechanical properties of the contact network pillar body meet the use requirements.

[0018] 2. Change the direction of the pulling force through the angle steel frame support and the fixed pulley group, and further apply a horizontal pulling force to the end of the contact network pillar body. Through multiple intermittent stretching of the hand winch fall chain, different forces are generated at the end of the contact network pillar body. The deflection of the contact network pillar body is detected by the horizontal displacement of the steel ruler, which saves the operation of manual maintenance and inspection and reduces the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0020] Figure 1 This is a structural diagram of the detection platform of the utility model.

[0021] Legend: 1. Pillar installation platform; 2. Contact network pillar body; 3. Steel ruler; 4. O-type clamp; 5. Wire rope; 6. Angle steel frame; 7. Fixed pulley block; 8. Stress sensor; 9. Hand hoist fall chain; 10. Ground anchor end. DETAILED DESCRIPTION

[0022] The embodiment of the present application provides a platform for testing the mechanical properties of railway contact network pillars, which effectively solves the problem that the ends of the pillars are eroded by rain for a long time, are prone to wear and tear, and affect the stability of the pillars. However, the ends of the pillars are buried in the ground, and it is difficult to detect damage to the pillars during daily maintenance, which affects the safe use of the contact network. The direction of the pulling force is changed by using angle steel frame supports and fixed pulley blocks, and a horizontal pulling force is further applied to the end of the contact network pillar body. Through multiple intermittent stretching of the hand winch fall chain, different forces are generated at the end of the contact network pillar body. The deflection of the contact network pillar body is detected by the horizontal displacement of a steel ruler. When the hand winch fall chain is applied to the upper limit force value, it is observed whether the structure at the bottom of the contact network pillar body is damaged, and it is further judged whether the mechanical properties of the contact network pillar body meet the use requirements.

[0023] Example

[0024] like Figure 1 As shown, the technical solution in the embodiment of the present application effectively solves the problem that the end of the pillar is eroded by rainwater for a long time, is easy to wear, and affects the stability of the pillar. However, the end of the pillar is buried in the ground. During daily maintenance, it is difficult to find damage to the pillar, which affects the technical problem of safe use of the contact network. The overall idea is as follows:

[0025] In view of the problems existing in the prior art, the utility model provides a railway contact network pillar mechanical performance testing platform, including a pillar installation platform 1, a contact network pillar body 2, a steel ruler 3 is arranged on the top of the contact network pillar body 2, and the steel ruler 3 fixed on the contact network pillar body 2 is measured by theodolite observation, and the displacement is recorded. Then, the load is continued to be applied to the standard inspection force value according to the 10% difference of the standard inspection force value, and whether the contact network pillar body 2 has cracks, and the crack width and displacement are measured and recorded. The surface of the contact network pillar body 2 is provided with an O-type clamp 4, and the surface of the O-type clamp 4 is provided with a steel wire rope 5;

[0026] An angle steel frame 6 is provided on one side of the pillar mounting platform 1, a fixed pulley block 7 is provided on the surface of the angle steel frame 6, a ground anchor end 10 is provided on one side of the angle steel frame 6, and a hand chain hoist fall chain 9 is provided at one end of the ground anchor end 10. The hand chain hoist fall chain 9 is adjusted until the stress sensor 8 returns to zero, and the scale value of the steel ruler 3 is observed and recorded by the theodolite. By rotating the hand chain hoist fall chain 9, a load is applied from zero to the standard test force value according to a step difference of 25% of the standard test force value. A stress sensor 8 is provided on the surface of the hand chain hoist fall chain 9, and the fixed pulley block 7 includes an angle steel frame formed by welding four sections of angle steel, a fixed pulley shaft, and a fixed pulley.

[0027] Working principle:

[0028] The first step is to simulate the actual stress condition of the contact network pillar body 2 installed on the railway roadbed. A standard test force value is preset according to the contact network pillar model. When the standard test force value is applied in multiple times in proportion to 200% through the hand chain hoist chain 9, the offset of the steel ruler 3 and whether the structure of the contact network pillar body 2 is damaged and whether cracks appear on the surface are observed to further judge whether the contact network pillar body 2 is qualified and whether it meets the railway use requirements. After all components of the railway contact network pillar mechanical performance testing platform are installed, adjust the hand chain hoist chain 9 until the stress The sensor 8 is reset to zero, and the scale value of the steel ruler 3 is observed and recorded through the theodolite. By turning the hand winch fall chain 9, the load is applied from zero to the standard test force value according to a step difference of 25% of the standard test force value. The static stop time is not less than 1 minute each time. Through the theodolite observation, the steel ruler 3 fixed on the contact network support body 2 is measured, and the offset is recorded. By observing the stress sensor 8, the hand winch fall chain 9 is loosened, and the load is unloaded from the standard test force value to zero. The static stop time is not less than 3 minutes. During the inspection process of the contact network support body 2, if the initial crack measured force value is greater than the allowable force value of the anti-crack inspection, it is determined that the inspected contact network support body 2 meets the anti-crack requirements.

[0029] The second step is to rotate the hand chain hoist fall chain 9, and apply load from zero to 80% of the standard test force value according to the step difference of 20%, and the static time of each time is not less than 1 minute. Through theodolite observation, measure the steel ruler 3 fixed on the contact network support body 2, and record the displacement. Then continue to apply load to the standard test force value according to the step difference of 10% of the standard test force value, and the static time of each time is not less than 3 minutes. Observe whether there are cracks on the contact network support body 2, and measure and record the crack width and displacement. If cracks appear at 100% of the standard test force value, unload to zero. If no cracks appear, continue to apply load in steps of 10% of the standard test force until cracks appear, measure and record the crack width and the offset of the steel ruler 3, with a static dwell time of no less than 3 minutes each time, unload from the initial crack force value to zero, and after unloading, stop for no less than 3 minutes to observe whether the crack is closed, measure and record the residual offset of the steel ruler 3, apply load in steps of 20% of the standard test force value from zero to 100%, measure and record the crack width and the offset of the steel ruler 3, and increase to 160% of the standard test force value, with a static dwell time of no less than 1 minute each time, and then continue to apply load in steps of 10% of the standard test force value, increasing to 200% of the standard test force value, with a static dwell time of no less than 3 minutes each time, measure and record the crack width and the offset of the steel ruler 3, check whether the pillar has reached the ultimate state of bearing capacity, and then unload to zero. If the actual offset of the steel ruler 3 is less than the allowable value of the mechanical property test, it is determined that the inspected contact network pillar body 2 meets the deflection offset requirements.

[0030] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A railway overhead line support mechanical performance testing platform, comprising a support installation platform (1) and an overhead line support body (2), characterized in that: A steel ruler (3) is arranged at the top of the contact network support body (2), an O-shaped clamp (4) is arranged on the surface of the contact network support body (2), and a steel wire rope (5) is arranged on the surface of the O-shaped clamp (4); The contact network support body (2) can be a contact network annular concrete support with a flange, a contact network annular steel pipe support, a contact network transverse rod support, or a contact network H-shaped steel support.

2. A railway overhead line support mechanical performance testing platform as claimed in claim 1, characterized in that: An angle steel frame (6) is provided on one side of the pillar mounting platform (1); The angle steel frame (6) is formed by welding four longitudinal angle steels and a plurality of transverse angle steels.

3. A railway overhead line support mechanical properties testing platform as claimed in claim 2, characterized in that: A fixed pulley block (7) is provided on the surface of the angle steel frame (6).

4. A railway overhead line support mechanical performance testing platform as claimed in claim 2, characterized in that: A ground anchoring end (10) is provided on one side of the angle steel frame (6).

5. A railway overhead line support mechanical performance testing platform as claimed in claim 4, characterized in that: One end of the ground anchor end (10) is provided with a hand chain hoist fall chain (9); One end of the hand chain hoist fall chain (9) is connected to the stress sensor (8) through a U-shaped iron ring, and the other end is connected to the ground anchor end (10) through a steel wire rope (5) and a U-shaped iron ring.

6. A railway overhead line support mechanical performance testing platform as claimed in claim 5, characterized in that: A stress sensor (8) is provided on the surface of the hand chain hoist fall chain (9).

7. A railway overhead line support mechanical performance testing platform as claimed in claim 3, characterized in that: The fixed pulley assembly (7) comprises an angle steel frame formed by welding four sections of angle steel, a fixed pulley shaft, and a fixed pulley; There are two fixed pulleys, which only change the direction of the steel wire rope (5) but do not change the force value of the steel wire rope (5).

8. A railway overhead line support mechanical performance testing platform as claimed in claim 1, characterized in that: The pillar installation platform (1) is a reinforced concrete structure with five sets of screw rods pre-buried for installing the contact network pillar body (2).

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