CN215726482U - Steel rail acting force calibration device - Google Patents
Steel rail acting force calibration device Download PDFInfo
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- CN215726482U CN215726482U CN202121460582.3U CN202121460582U CN215726482U CN 215726482 U CN215726482 U CN 215726482U CN 202121460582 U CN202121460582 U CN 202121460582U CN 215726482 U CN215726482 U CN 215726482U
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Abstract
The utility model discloses a steel rail acting force calibration device which comprises a cross beam, a left clamp seat and a right clamp seat, wherein the lower ends of the left clamp seat and the right clamp seat are provided with clamp installation grooves, two symmetrically arranged C-shaped clamps for clamping a steel rail are arranged in the installation grooves, the left clamp seat and the right clamp seat are both provided with arc-shaped grooves, the cross beam is arranged on one side, close to the arc-shaped grooves, of the left clamp seat and the right clamp seat, the left clamp seat and the right clamp seat are provided with transverse bolts capable of sliding along the arc-shaped grooves, and the cross beam is respectively connected with the transverse bolts through movable joint bolt assemblies; the steel rail clamp is characterized in that a hydraulic cylinder lower clamp clamped on a steel rail is arranged between the left clamp seat and the right clamp seat, the hydraulic cylinder lower clamp forms an arc-shaped chute along the circumferential surface of the hydraulic cylinder lower clamp, a hydraulic cylinder supporting seat capable of sliding along the arc-shaped chute is arranged on the hydraulic cylinder lower clamp, a hydraulic cylinder is installed on the hydraulic cylinder supporting seat, and the output end of the hydraulic cylinder is connected with the beam. The utility model is beneficial to popularization and application.
Description
Technical Field
The utility model relates to the technical field of steel rail acting force calibration, in particular to a steel rail acting force calibration device.
Background
After the bridge is assembled, the stress-strain relationship of the steel rail acting force needs to be known, and the actual steel rail dynamic stress can be calculated after the measured steel rail strain data is obtained through the strain patterns forming the bridge. In the running process of the train, the steel rail is generally in an elastic deformation state, so the stress-strain relation of the acting force of the steel rail is a linear relation, and the design work of a calibration system is carried out.
The rail force calibration system mainly comprises a calibration device and a calibration pressurization system. The whole body applies force to the calibration device and the steel rail through the pressurization system, and the load applied to the steel rail when a train passes through is simulated, so that the load generates strain, and the function is the whole function of the calibration system. However, the existing calibration device has the defects that the stress is not uniform and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a steel rail acting force calibration device to solve the defects of the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a steel rail acting force calibration device comprises a cross beam, a left clamp seat and a right clamp seat, wherein clamp installation grooves are formed in the lower ends of the left clamp seat and the right clamp seat, two C-shaped clamps which are symmetrically arranged and used for being clamped on a steel rail are arranged in the installation grooves, arc-shaped grooves are formed in the left clamp seat and the right clamp seat, the cross beam is arranged on one side, close to the arc-shaped grooves, of the left clamp seat and the right clamp seat, transverse bolts capable of sliding along the arc-shaped grooves are arranged on the left clamp seat and the right clamp seat, and the cross beam is connected with the transverse bolts through movable joint bolt assemblies; the steel rail clamp is characterized in that a hydraulic cylinder lower clamp clamped on a steel rail is arranged between the left clamp seat and the right clamp seat, the hydraulic cylinder lower clamp forms an arc-shaped chute along the circumferential surface of the hydraulic cylinder lower clamp, a hydraulic cylinder supporting seat capable of sliding along the arc-shaped chute is arranged on the hydraulic cylinder lower clamp, a hydraulic cylinder is installed on the hydraulic cylinder supporting seat, and the output end of the hydraulic cylinder is connected with the beam.
Further, the hydraulic cylinder supporting seat comprises a supporting seat cover matched with the hydraulic cylinder, and a bulge matched with the arc-shaped sliding groove is arranged on the back of the supporting seat cover.
Further, the hydraulic cylinder lower clamp comprises two C-shaped lower clamp seats which are symmetrically arranged, and the arc-shaped sliding groove is formed in each C-shaped lower clamp seat.
Further, the two C-shaped lower clamp seats are detachably and fixedly connected through bolts.
Furthermore, the cross beam is formed by welding steel plates.
Further, the cross beam is connected to the corresponding transverse bolt by two swing bolt assemblies.
Further, the two symmetrically arranged C-shaped clamps are detachably connected through bolts.
Further, the swing bolt assembly includes a swing bolt, a nut, and a washer assembly.
Compared with the prior art, the utility model has the beneficial effects that:
after the steel rail is pasted, a calibration device and a hydraulic cylinder lower clamp are installed on a steel rail during calibration, the hydraulic cylinder and a support seat are placed on the hydraulic cylinder clamp, then a swing bolt, a cushion block and a nut are connected with a beam and then placed at the corresponding position of the clamp, and the distance between the top of the swing bolt and the upper surface of the beam is set to be 90 mm. And finally, penetrating a transverse bolt to complete the installation of the vertical calibration working condition of the integral calibration device.
After the vertical force calibration is completed, the working conditions can be switched: the hydraulic cylinder is unloaded, the position of the cross beam is kept, then the cross beam and the transverse bolt can be slid along the arc-shaped groove by loosening the nut of the transverse bolt, so that the working condition switching is realized, and after the transverse bolt reaches the arc-shaped groove designated position, the hydraulic cylinder can be continuously loaded, so that the position of the cross beam is fixed, and finally the transverse force is calibrated.
Drawings
FIG. 1 is a schematic structural diagram of a rail force calibration device disclosed by the present invention;
FIG. 2 is a top view of a rail force calibration apparatus according to the present disclosure;
FIG. 3 is a partial schematic view of FIG. 2;
FIG. 4 is a three-dimensional model view of a beam;
FIG. 5 is a schematic structural view of the left or right jig base;
FIG. 6 is a schematic structural view of a lower clamp of the hydraulic cylinder;
FIG. 7 is a schematic view of a hydraulic cylinder support seat;
FIG. 8 is a three-dimensional model diagram of a spacer block;
FIG. 9(a) is a schematic diagram of a lateral force calibration condition;
FIG. 9(b) is a schematic diagram of the vertical force calibration condition.
Reference numerals: 1-left clamp seat; 2-an arc-shaped groove; 3-a hydraulic cylinder; 4-a cross beam; 5-swing bolt M30x 220; 6-cushion block; 7-nut M30; 8-transverse bolt M24x 120; a 9-C type clamp seat; 11-steel rail; 12-nut M14; 13-nut M8; 14-bolt M24x 140; 15-nut M24; 16-bolt M8x 30; 17-hydraulic cylinder supporting seats; and 18-hydraulic cylinder lower clamp.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
A steel rail acting force calibration device comprises a cross beam, a left clamp seat and a right clamp seat, wherein clamp installation grooves are formed in the lower ends of the left clamp seat and the right clamp seat, two C-shaped clamps which are symmetrically arranged and used for being clamped on a steel rail are arranged in the installation grooves, arc-shaped grooves are formed in the left clamp seat and the right clamp seat, the cross beam is arranged on one side, close to the arc-shaped grooves, of the left clamp seat and the right clamp seat, transverse bolts capable of sliding along the arc-shaped grooves are arranged on the left clamp seat and the right clamp seat, and the cross beam is connected with the transverse bolts through movable joint bolt assemblies; a hydraulic cylinder lower clamp clamped on the steel rail is arranged between the left clamp seat and the right clamp seat, an arc-shaped chute is formed along the circumferential surface of the hydraulic cylinder lower clamp, a hydraulic cylinder supporting seat capable of sliding along the arc-shaped chute is arranged on the hydraulic cylinder lower clamp, a hydraulic cylinder is installed on the hydraulic cylinder supporting seat, and the output end of the hydraulic cylinder is connected with the cross beam; the hydraulic cylinder supporting seat comprises a supporting seat cover matched with the hydraulic cylinder, and a bulge matched with the arc-shaped sliding groove is arranged on the back of the supporting seat cover; the hydraulic cylinder lower clamp comprises two C-shaped lower clamp seats which are symmetrically arranged, and the arc-shaped sliding groove is formed in each C-shaped lower clamp seat; the two C-shaped lower clamp seats are detachably and fixedly connected through bolts; the cross beam is formed by welding steel plates; the cross beam is connected with the corresponding transverse bolt through two swing bolt assemblies; the two symmetrically arranged C-shaped clamps are detachably connected through bolts; the swing bolt assembly includes a swing bolt, a nut, and a washer assembly.
In the actual calibration process, due to the fact that the cross beam is too heavy and the number of the fasteners is large, conversion of two calibration working conditions of the transverse force and the vertical force of the steel rail is time-consuming and complex, and is difficult to complete by only one person, and therefore the calibration device in the system mainly considers convenience of working condition conversion; the left clamp seat and the right clamp seat of the calibration device are arranged on two sides of the strain rosette, the distance between the centers of the left clamp seat and the right clamp seat is 600mm, and the left clamp seat and the right clamp seat are approximately positioned above two adjacent sleepers.
(1) Beam design (as shown in figure 4)
The design of crossbeam mainly considers the holistic convenience of device, will reduce calibration device whole weight as far as possible when the design, nevertheless for guaranteeing anchor clamps intensity, consequently with the crossbeam design for forming by the steel sheet welding, strengthen at key position and guarantee that the deflection is not too big. In terms of the length of the beam, the center of the clamp is 600mm away, so that the length is 843mm in combination with the size of other components. The height of the beam is selected taking into account the length of the swing bolts and the overall weight of the beam. The size and the integral stress of the hydraulic cylinder are the main points of the width of the cross beam. In order to strengthen the whole structure, the upper part of the contact part of the beam and the hydraulic cylinder is provided with a thickened steel plate and a vertical plate, and the position of the eye bolt is also provided with a sleeve. The three-dimensional modeling of the beam is shown in the following figure.
(2) Left and right clamp seats (as shown in figure 5)
The design work of the left clamp seat and the right clamp seat is the key point in the system, and the switching between two measuring working conditions of vertical force and transverse force is realized. An arc-shaped groove is arranged on a vertical plate which is positioned on the longitudinal vertical surface of the steel rail in the left clamp seat and the right clamp seat, a bolt is transversely arranged in the arc-shaped groove, the transverse beam lifts the transverse bolt through an eyelet bolt during calibration, the transverse bolt transmits force to the steel rail through the arc-shaped groove of the clamp, the position of the transverse beam is determined, and the transverse beam is fixed when reaching a test position. In addition, due to the fact that the problem of fat edge occurs in the actual use process of the steel rail, although the model of the steel rail mainly referred to in the design of the system is 60kg/m rail, the adaptability to different models of steel rails such as 75kg/m rail is considered, the size design of the contact part of the left clamp seat and the right clamp seat of the steel rail is slightly large, and the shape of the contact part of the left clamp seat and the right clamp seat of the steel rail is designed into a mode of combining a plane and a fillet aiming at machining, but not the actual outline of the steel rail. In order to enable the processing to be more convenient, the vertical plate and the rail clamp are designed to be processed in a split mode and then are jointed by welding, the scheme can achieve calibration of vertical and transverse forces of the rail, the operation is convenient and fast, and the processing manufacturability is improved.
(3) A hydraulic cylinder support (as shown in figure 6) and a hydraulic cylinder lower clamp (as shown in figure 7)
Because this system mainly realizes the switching of two kinds of measuring operating modes of vertical power and transverse force, consequently the pneumatic cylinder is in order to rotate around the rail with the crossbeam in the lump when the operating mode conversion, so the supporting seat under the pneumatic cylinder is in order to take this function into account to it is also necessary that it corresponds the anchor clamps that use, is provided with the groove on this anchor clamps, plays the gliding guide effect of supporting seat.
(4) The rest of the components
In the system, the swing bolt, the ordinary bolt, the nut and the cushion block form the rest parts of the calibration device, and the cushion block is responsible for connecting the swing bolt and the beam, as shown in fig. 8. The choice of swing bolt is mainly made in consideration of the diameter of its hole, the length of the guide rod and the nominal diameter, the diameter of the hole being determined by the nominal diameter of the transverse bolt, which also determines the size of the nominal diameter of its thread. The bolts used in the system are M8, M14 and M24, and the size of the swing bolt is M30 multiplied by 220.
The steel rail acting force calibration device not only integrates two test working conditions of vertical force and transverse force, but also only needs to loosen the bolt when the working conditions are switched, the cross beam and the hydraulic cylinder are pulled to another position around the steel rail, and the steel rail acting force calibration device can be pressurized to calibrate after the bolt is fastened. The method not only reduces the quality (1) of the tool, but also greatly reduces the calibration time and simplifies the calibration work. The transverse force test condition is shown in fig. 9(a), and the vertical force test condition is shown in fig. 9 (b).
After pasting, installing a calibration device and a hydraulic cylinder lower clamp on a steel rail during calibration, wherein the center distance between the two clamps is 600mm, and then placing a hydraulic cylinder and a supporting seat on the hydraulic cylinder clamp; and then, connecting the swing bolt, the cushion block and the nut with the beam, and then placing the swing bolt, the cushion block and the nut at the corresponding positions of the clamp, wherein the distance between the top of the swing bolt and the upper surface of the beam is set to be 90 mm. And finally, penetrating a transverse bolt to complete the installation of the vertical calibration working condition of the integral calibration device.
After the vertical force calibration is completed, the working conditions can be switched: the hydraulic cylinder is unloaded, the position of the cross beam is kept, then the cross beam and the transverse bolt can be slid along the arc-shaped groove by loosening the nut of the transverse bolt, so that the working condition switching is realized, and after the transverse bolt reaches the arc-shaped groove designated position, the hydraulic cylinder can be continuously loaded, so that the position of the cross beam is fixed, and finally the transverse force is calibrated.
Installation:
after the left and right clamp seats of the steel rail are spliced together, the steel rail is fastened by using an M14 bolt and a nut to form an integral clamp which can be adapted to steel rails of different types. The distance between the centers of the two sets of clamps is 600 mm.
And (3) mounting the hydraulic cylinder lower clamp on two sides of the steel rail, fastening by using M8 bolts and nuts, wherein the distance from the center position of the hydraulic cylinder lower clamp to the centers of the left and right clamp seats of the steel rail is 300 mm.
The hydraulic cylinder supporting seat is arranged in the corresponding arc-shaped sliding groove of the lower fixture of the hydraulic cylinder, the groove is arranged on the outer side of the steel rail, and the hydraulic cylinder is arranged on the groove, so that the fixture is installed.
Correspondingly inserting four M30 swing bolts into four sleeves of the beam, wherein the upper ends of the swing bolts are 90mm away from the upper part of the beam, and the heads of the swing bolts are coaxial; and determining the position, and sequentially installing the cushion block and the two M30 nuts in place to finish the pre-installation of the beam.
And lifting the cross beam, so that the left clamp seat and the right clamp seat of the steel rail are respectively inserted into the gap of the two M30 swing bolts, and the head circle of the M30 swing bolt is kept to be matched with the arc groove at the upper part of the arc groove of the cross beam, and the fixed ring of the hydraulic cylinder on the cross beam is respectively matched with the hydraulic cylinder. And (3) passing the M24 transverse bolt through the head circle of the M30 swing bolt and the arc-shaped grooves on the vertical plates of the left and right clamps of the steel rail for fastening.
And finally, pressurizing the hydraulic cylinder until the hydraulic cylinder is contacted with the cross beam so as to fix the position of the cross beam and complete the installation of the integral calibration device.
The working principle is as follows:
and calibrating, namely after the hydraulic cylinder is pressurized, simulating the vertical force or the transverse force of the steel rail by the hydraulic cylinder through the force transmitted by the hydraulic cylinder supporting seat and the lower clamp thereof. The other end of the hydraulic cylinder applies force upwards or outwards to the cross beam, and the cross beam is influenced by the cushion block and the hydraulic cylinder to keep fixed in position, so that reaction force is generated on the cushion block. The force is transmitted from the spacer block to the M30 nut and M30 swing bolt, and then transmitted to the left and right clamp seats of the rail and the rail through the transverse bolt. The M30 swing bolt is pulled for a loose connection. Because the left and right clamp seats of the steel rail are fixed, the M24 transverse bolt is sheared. The M8 bolt only plays the fixed action of clamp under the pneumatic cylinder, and the load is less. The M14 bolt is used for fastening the left and right clamp seats of the steel rail, is pulled in an ideal state when vertical force calibration is carried out, is tightly connected and is only subjected to pretightening force; when the transverse force calibration is carried out, the tension is applied, and the connection is tight.
And (3) working condition conversion:
when the device is installed, the working condition is calibrated for vertical force, when the working condition needs to be converted, the hydraulic cylinder is unloaded, the M24 nut is loosened, the M24 transverse bolt is moved downwards out of the arc-shaped groove, and moves integrally along the arc-shaped groove along with the cross beam, the M30 swing bolt, the hydraulic cylinder and the hydraulic cylinder support seat until the M24 transverse bolt reaches the other arc-shaped groove on the vertical plate of the left clamp seat and the right clamp seat of the steel rail, and the hydraulic cylinder is pressurized until the hydraulic cylinder is contacted with the cross beam after the position of the hydraulic cylinder is adjusted to be horizontal, so that the position of the cross beam is fixed, and the conversion of the working condition for calibrating the transverse force of the steel rail is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to or changed within the scope of the present invention.
Claims (8)
1. A rail acting force calibration device is characterized in that: the steel rail clamp comprises a cross beam, a left clamp seat and a right clamp seat, wherein clamp mounting grooves are formed in the lower ends of the left clamp seat and the right clamp seat, two C-shaped clamps which are symmetrically arranged and used for being clamped on a steel rail are arranged in the mounting grooves, arc-shaped grooves are formed in the left clamp seat and the right clamp seat, the cross beam is arranged on one side, close to the arc-shaped grooves, of the left clamp seat and the right clamp seat, transverse bolts capable of sliding along the arc-shaped grooves are arranged on the left clamp seat and the right clamp seat, and the cross beam is connected with the transverse bolts through movable joint bolt assemblies; the steel rail clamp is characterized in that a hydraulic cylinder lower clamp clamped on a steel rail is arranged between the left clamp seat and the right clamp seat, the hydraulic cylinder lower clamp forms an arc-shaped chute along the circumferential surface of the hydraulic cylinder lower clamp, a hydraulic cylinder supporting seat capable of sliding along the arc-shaped chute is arranged on the hydraulic cylinder lower clamp, a hydraulic cylinder is installed on the hydraulic cylinder supporting seat, and the output end of the hydraulic cylinder is connected with the beam.
2. A rail force calibration apparatus as claimed in claim 1, wherein: the hydraulic cylinder supporting seat comprises a supporting seat cover matched with the hydraulic cylinder, and a bulge matched with the arc-shaped sliding groove is arranged on the back of the supporting seat cover.
3. A rail force calibration apparatus as claimed in claim 1, wherein: the hydraulic cylinder lower clamp comprises two C-shaped lower clamp seats which are symmetrically arranged, and the arc-shaped sliding groove is formed in each C-shaped lower clamp seat.
4. A rail force calibration apparatus as claimed in claim 3, wherein: the two C-shaped lower clamp seats are detachably and fixedly connected through bolts.
5. A rail force calibration apparatus as claimed in claim 1, wherein: the cross beam is formed by welding steel plates.
6. A rail force calibration apparatus as claimed in claim 1, wherein: the cross beam is connected to the corresponding transverse bolts by two swing bolt assemblies.
7. A rail force calibration apparatus as claimed in claim 1, wherein: the two C-shaped clamps which are symmetrically arranged are detachably connected through bolts.
8. A rail force calibration apparatus as claimed in claim 1, wherein: the swing bolt assembly includes a swing bolt, a nut, and a washer assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121460582.3U CN215726482U (en) | 2021-06-29 | 2021-06-29 | Steel rail acting force calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121460582.3U CN215726482U (en) | 2021-06-29 | 2021-06-29 | Steel rail acting force calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215726482U true CN215726482U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121460582.3U Active CN215726482U (en) | 2021-06-29 | 2021-06-29 | Steel rail acting force calibration device |
Country Status (1)
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|---|---|
| CN (1) | CN215726482U (en) |
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2021
- 2021-06-29 CN CN202121460582.3U patent/CN215726482U/en active Active
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