1. The utility model provides a rail fastener bullet strip withholds force test system which characterized in that, the test procedure includes following step:

s1, applying a constant excitation to the elastic strip of the steel rail elastic fastener;

s2, measuring the vibration frequency and vibration amplitude of the elastic strip of the steel rail elastic fastener;

s3, establishing a database of the relation among the buckling pressure, the vibration frequency and the vibration amplitude of the elastic strips of the elastic fasteners of different steel rails;

and comparing the vibration frequency and the vibration amplitude of the elastic strip of the steel rail elastic fastener tested in the step S2 with the relational database established in the step S3 to obtain corresponding fastening pressure parameters.

2. The system for testing the buckling pressure of the elastic strip of the steel rail fastener according to claim 1, wherein the vibration frequency and the vibration amplitude of the elastic strip of the steel rail fastener are tested by a laser vibration measurement method.

3. The steel rail fastener elastic strip buckling pressure testing system as claimed in claim 1, wherein the relationship among the vibration frequency, the vibration amplitude and the buckling pressure of the steel rail elastic fastener elastic strip is established through simulation software.

4. The steel rail fastener elastic strip buckling pressure testing system as claimed in claim 1, wherein constant excitation of the steel rail elastic fastener elastic strip is achieved through a constant excitation device, the constant excitation device comprises a guide barrel, the guide barrel is mounted on the steel rail fastener elastic strip, an excitation ball is mounted at the top of the guide barrel, a clamping structure used for clamping the excitation ball is arranged on the side portion of the guide barrel, the clamping structure is connected with a switch structure, and a tester can achieve opening and closing of the clamping structure through the switch structure so that the excitation can be achieved to the steel rail elastic fastener elastic strip.

5. The steel rail fastener elastic strip buckling pressure testing system as claimed in claim 4, wherein the clamping structure comprises an outer barrel sleeved outside the guide barrel, a plurality of slide rails are arranged on the inner wall of the outer barrel, slide blocks are connected in the slide rails in a sliding manner, clamping rods are contacted with one ends of the slide blocks, which are far away from the slide rails, baffles are arranged in the middle of the clamping rods, heads of the baffles penetrate through the guide barrel, inclined planes are arranged at junctions of the clamping rods and the slide blocks so as to enable the slide blocks to push the clamping rods to transversely translate, and one ends of the clamping rods, which are far away from the slide blocks, are abutted against the lower side of the excitation balls so as to clamp the excitation balls; the slider with the switch structure is connected, the switch structure is used for driving the slider along the slide rail reciprocates.

6. The steel rail fastener elastic strip buckling pressure testing system as claimed in claim 5, wherein the switch structure comprises a slide rod, the bottom end of the slide rod penetrates through the outer barrel downwards and is connected to the top end of the slide block, the top end of the slide rod is connected with a pressing plate, a spring in a compressed state is arranged between the pressing plate and the outer barrel, and the spring is sleeved on the side portion of the slide rod.

7. The steel rail fastener elastic strip buckling pressure testing system as claimed in claim 6, wherein an arc-shaped slot is formed at the bottom end of the outer barrel, so that the outer barrel can be conveniently limited to the side portion of the steel rail fastener elastic strip.

Background

The rails are fixed to the sleepers of the track bed by elastic fasteners. The buckling and pressing piece of the elastic fastener is mainly an elastic strip, and the buckling and pressing piece generates buckling and pressing force to act on the rail through bending and twisting deformation of the elastic strip, so that reliable connection between the steel rails is effectively ensured for a long time, the integrity of the rail is kept as much as possible, the steel rails are prevented from moving longitudinally and transversely relative to the sleeper, and the rail gauge is ensured to be normal, thereby ensuring the running safety of rail vehicles. The elastic strip works under repeated alternating stress, bears multiple functions of bending, torsion, fatigue, corrosion and the like, and in the operation and maintenance process, workers in a work section need to measure the buckling pressure of the elastic strip in time to ensure the buckling pressure so as to ensure the normal track gauge and ensure the running safety of a railway vehicle. The fastening force of the elastic strip fastener system mainly has the following defects at present:

1. the fastening pressure of the elastic strip is judged by measuring the torque of the bolt, the test process is relatively complicated, and a large number of hands are needed;

2. the buckling pressure of the elastic strip cannot be accurately measured, and the measurement precision is low;

3. no modern measurement system can conveniently and quickly obtain the magnitude of the buckling force;

4. at present, the influence of factors such as the type of the elastic strip is not considered, and the testing adaptability is poor.

Disclosure of Invention

The invention aims to provide a steel rail fastener elastic strip buckling pressure testing system.

In order to achieve the aim, the invention provides a steel rail fastener elastic strip buckling pressure testing system, which comprises the following steps: s1, applying a constant excitation to the elastic strip of the steel rail elastic fastener; s2, measuring the vibration frequency and vibration amplitude of the elastic strip of the steel rail elastic fastener; s3, establishing a database of the relation among the buckling pressure, the vibration frequency and the vibration amplitude of the elastic strips of the elastic fasteners of different steel rails; and comparing the vibration frequency and the vibration amplitude of the elastic strip of the steel rail elastic fastener tested in the step S2 with the relational database established in the step S3 to obtain corresponding fastening pressure parameters.

Preferably, the vibration frequency and the vibration amplitude of the elastic strip of the steel rail elastic fastener are tested by a laser vibration measurement method.

Preferably, the relationship among the vibration frequency, the vibration amplitude and the buckling pressure of the elastic strip of the steel rail elastic fastener is established through simulation software.

Preferably, realize the invariable excitation to rail elastic fastener bullet strip through invariable excitation device, invariable excitation device includes the direction bucket, the direction bucket is installed on rail fastener bullet strip, the excitation ball is installed at direction bucket top, and the lateral part is provided with and is used for the joint structure of excitation ball, the joint structural connection has the switch structure, and the tester passes through the switch structure realizes opening and shutting of joint structure, so that the excitation is sought to fall to rail elastic fastener bullet strip.

Preferably, the clamping structure comprises an outer barrel sleeved outside the guide barrel, a plurality of slide rails are arranged on the inner wall of the outer barrel, a slide block is connected in the slide rails in a sliding manner, one end, away from the slide rails, of the slide block is in contact with a clamping rod, a baffle is arranged in the middle of the clamping rod, the head of the clamping rod penetrates into the guide barrel, inclined planes are arranged at the junctions of the clamping rod and the slide block so as to enable the slide block to push the clamping rod to transversely translate, and one end, away from the slide block, of the clamping rod is abutted to the lower side of the excitation ball so as to clamp the excitation ball; the slider with the switch structure is connected, the switch structure is used for driving the slider along the slide rail reciprocates.

Preferably, the switch structure comprises a slide rod, the bottom end of the slide rod penetrates through the outer barrel downwards and is connected to the top end of the slide block, the top end of the slide rod is connected with a pressing plate, a spring in a compressed state is arranged between the pressing plate and the outer barrel, and the spring is sleeved on the side portion of the slide rod.

Preferably, an arc-shaped slot is formed in the bottom end of the outer barrel, so that the outer barrel can be conveniently limited to the side part of the elastic strip of the steel rail elastic fastener.

Therefore, compared with manual testing, the steel rail fastener elastic strip buckling pressure testing system adopting the structure is convenient and quick, more accurate in measurement and wider in measurement range.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural view of a constant excitation device according to the present invention.

Reference numerals

1. A guide barrel; 2. exciting a ball; 3. an outer tub; 4. a slide rail; 5. a slider; 6. a clamping and connecting rod; 7. a slide bar; 8. a pressing plate; 9. a spring; 10. arc-shaped grooving; 11. and a baffle plate.

Detailed Description

The technical solution of the present invention is further illustrated by the accompanying drawings and examples.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Fig. 1 is a schematic structural view of a constant excitation device according to the present invention. As shown in fig. 1, the steel rail fastener elastic strip buckling pressure testing system of the structure of the invention comprises the following steps: s1, applying a constant excitation to the elastic strip of the steel rail elastic fastener; s2, measuring the vibration frequency and vibration amplitude of the elastic strip of the steel rail elastic fastener; s3, establishing a database of the relation among the buckling pressure, the vibration frequency and the vibration amplitude of the elastic strips of the elastic fasteners of different steel rails; and comparing the vibration frequency and the vibration amplitude of the elastic strip of the steel rail elastic fastener tested in the step S2 with the relational database established in the step S3 to obtain corresponding fastening pressure parameters.

In the S1 step of this embodiment, for applying a invariable excitation to rail elastic fastener bullet strip, be provided with a invariable excitation device, invariable excitation device is including direction bucket 1, direction bucket 1 is installed on rail fastener bullet strip, excitation ball 2 is installed at direction bucket 1 top, and the lateral part is provided with and is used for the joint structure of excitation ball 2, the joint structural connection has the switch structure, and the tester passes through the switch structure realizes opening and shutting of joint structure, so that the excitation is sought to fall to rail elastic fastener bullet strip. The clamping structure comprises an outer barrel 3 sleeved outside the guide barrel 1, a plurality of slide rails 4 are arranged on the inner wall of the outer barrel 3, a slide block 5 is connected in the slide rails 4 in a sliding mode, one end, far away from the slide rails 4, of the slide block 5 is in contact with a clamping rod 6, a baffle plate 11 is arranged in the middle of the clamping rod 6, the head of the clamping rod penetrates into the guide barrel 1, inclined planes are arranged at the junctions of the clamping rod 6 and the slide block 5 so that the slide block 5 can push the clamping rod 6 to transversely translate, and one end, far away from the slide block 5, of the clamping rod 6 abuts against the lower side of the excitation ball 2 so that the excitation ball 2 can be clamped; the sliding block 5 is connected with the switch structure, and the switch structure is used for driving the sliding block 5 to move up and down along the sliding rail 4. The switch structure comprises a sliding rod 7, the bottom end of the sliding rod 7 penetrates through the outer barrel 3 downwards and is connected to the top end of the sliding block 5, the top end of the sliding rod 7 is connected with a pressing plate 8, a spring 9 in a compressed state is arranged between the pressing plate 8 and the outer barrel 3, and the spring 9 is sleeved on the side portion of the sliding rod 7. A tester clicks the pressing plate 8 to enable the sliding rod 7 to drive the sliding block 5 to move downwards, the sliding block 5 is separated from the clamping rod 6, the clamping rod 6 loses the jacking force given by the sliding block 5 and is pushed by the shock excitation ball 2 to move towards the direction far away from the shock excitation ball 2, and the shock excitation ball 2 automatically falls under the influence of gravity after losing the clamping limit of the clamping rod 6 until hitting the side part of the elastic strip of the steel rail elastic fastener to cause the vibration of the elastic strip of the steel rail elastic fastener; the bottom end of the outer barrel 3 is provided with an arc-shaped slot 10, so that the outer barrel 3 can be conveniently limited to the side part of the elastic strip of the steel rail elastic fastener.

In this embodiment S2 step, utilize the vibration frequency and the vibration amplitude of laser vibration test method test rail elastic fastener bullet strip, the vibration amplitude measurement precision minimum distinguishable reaches 50pm, and minimum measurable quantity frequency point is 1Hz, has the high advantage of measurement accuracy.

In step S3 of this embodiment, because the types of the elastic bars in each work section are not uniform, in order to make the use of the apparatus wider, it is necessary to establish the relationship between the vibration frequency and the vibration amplitude of various types of elastic bars and the fastening pressure of the elastic bars by using the constant excitation and laser vibration measurement methods, to form a set of database of the relationship between the vibration frequency and the vibration amplitude and the fastening pressure of the elastic bars, to implement diversification of measurement of the elastic bars, and to establish the relationship between the vibration frequency, the vibration amplitude and the fastening pressure of the elastic bars of the steel rail elastic fastener by using simulation software, to implement quick comparison in application.

Therefore, compared with manual testing, the steel rail fastener elastic strip buckling pressure testing system is convenient and quick, accurate in measurement and wide in measurement range.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.