CN117418423A

CN117418423A - Hydraulic rail stretcher

Info

Publication number: CN117418423A
Application number: CN202311417981.5A
Authority: CN
Inventors: 卫星; 常艳普
Original assignee: Henan Muyao Technology Co ltd
Current assignee: Henan Muyao Technology Co ltd
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2024-01-19

Abstract

The invention belongs to the technical field of rail transit equipment, and discloses a hydraulic steel rail stretcher, which comprises hydraulic telescopic rods, wherein electromagnetic control valves are fixedly arranged on the left side and the right side of the tops of the two hydraulic telescopic rods, rectangular bulges are slidably arranged at the right ends of the hydraulic telescopic rods, and fixing pins are movably sleeved in the middle parts of the rectangular bulges. According to the invention, the metal conductive shaft is adjusted to the target scale position needing to be moved, the threaded knob is screwed to fix the metal conductive shaft, the left slider and the right slider are adjusted to be attached to the cross section of the steel rail, the right binding post and the left binding post are connected with the electromagnetic control valve through the lead, the hydraulic telescopic rod is controlled to move the steel rail, when the metal conductive shaft is contacted with the contact seat, the electromagnetic control valve is closed, so that the hydraulic telescopic rod is stopped from being shortened, the distance between two steel rails is adjusted to the target distance at one time, and the problem that the working efficiency is reduced due to the fact that the conventional steel rail needs to be adjusted for multiple times when the conventional steel rail is adjusted to the target distance is solved.

Description

Hydraulic rail stretcher

Technical Field

The invention belongs to the technical field of rail transit equipment, and particularly relates to a hydraulic steel rail stretcher.

Background

The hydraulic rail stretcher is mainly applied to seamless stress relief and long rail laying of rails on a railway, when the stress relief operation of a seamless line is carried out, after a rail fastener is loosened, when the temperature of the rail reaches the standard requirement, the stress of the rail reaches a freely released state, and a pre-calculated tensile force is applied to ensure the gap between rail bars of the rail, and the hydraulic rail stretcher specifically comprises the following steps: after the whole machine is installed on a steel rail, a hammer is used for knocking one end clamp body oblique iron, after the compression is determined, a hydraulic pump station is used for adjusting the length of a stretching oil cylinder, then the other end clamp oblique iron is used for compressing, a hydraulic cylinder station is used for directly driving a piston to move, and along with the increase of the tensile force, the steel rail is clamped more tightly by the oblique iron, so that the steel rail is clamped to stretch and move reversely, and further, the stress of a line is dispersed and the long rail is paved.

In the using process of seamless stress relief of steel rails and long rail laying of the existing hydraulic steel rail stretcher, after the stress relief, the distance between the two steel rails needs to be controlled within an accurate value, and for a seamless line, a gap of 26mm is generally reserved between the two steel rails so as to prepare for thermite welding between the following steel rails; for long rail laying, a rail gap needs to be reserved between two steel rails, so that the expansion caused by heat and the contraction caused by cold of the steel rails are facilitated. The existing control of the gap is to measure the laser on the clamping mechanism and then control the hydraulic rail stretcher to move. Because the clamp oblique iron and the rail can slide, a certain error exists between the movement amount measured by the laser and the actual movement amount of the rail, multiple times of adjustment are needed, the process is complicated, and the working efficiency is reduced.

Disclosure of Invention

The invention aims to provide a hydraulic rail stretcher for solving the problems in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a hydraulic rail stretcher, includes hydraulic telescoping rod, two the equal fixed mounting in left and right sides of hydraulic telescoping rod top has electromagnetic control valve, hydraulic telescoping rod's right-hand member slidable mounting has the rectangle arch, the bellied middle part activity of rectangle has cup jointed the fixed pin, hydraulic telescoping rod's left side slidable mounting has the U-shaped arch, the bellied middle part activity of U-shaped has cup jointed the fixed pin, still includes

The clamping mechanism is fixedly connected between the two rectangular bulges, the clamping mechanism is fixedly connected between the two U-shaped bulges, the clamping mechanism comprises a shell and two inclined blocks, the bottom of the shell is provided with an installation cavity, the inner sides of the two inclined blocks are respectively and slidably provided with a contact curved block, the outer sides of the two inclined blocks are respectively and fixedly provided with a hydraulic shell, the middle part of the hydraulic shell is movably sleeved with a T-shaped shaft, and the middle part of the T-shaped shaft is fixedly provided with a compression spring;

the two connecting pipes are respectively clamped above one side opposite to the two shells;

and the two ends of the distance control mechanism are movably sleeved at the middle parts of the two connecting pipes.

Preferably, the distance control mechanism comprises a connecting shaft, the right part of the connecting shaft is in sliding sleeve connection with a right sliding piece, a metal conductive shaft is movably arranged in the middle of the right sliding piece, the right end of the metal conductive shaft is fixedly connected with a right binding post, a fixing block is arranged above the curved surface of the metal conductive shaft, screw threads are connected with screw threads in front and behind the fixing block, the left part of the connecting shaft is in sliding sleeve connection with a left sliding piece, a contact seat is fixedly arranged in the middle of the left sliding piece, and a left binding post is fixedly connected with the left side of the contact seat.

Preferably, the outside of electromagnetic control valve all is provided with and snatchs handrail one with hydraulic telescoping rod fixed connection, the front and back of the upper surface of casing all is equipped with snatchs handrail two.

Preferably, the inner side opening of the installation cavity is larger than the outer side opening, the contact surface of the installation cavity and the inclined block is an inclined surface, the depth of the installation cavity is equal to the height of the steel rail, and the middle part of the inclined block is provided with a through hole with the same diameter at one end of the T-shaped shaft far away from the hydraulic shell.

Preferably, the curved surface of the contact curved block is in fit and abutting connection with the curved surface of the steel rail, and the middle part of the contact curved block is provided with a through hole with the same diameter as that of one end, far away from the hydraulic shell, of the T-shaped shaft.

Preferably, the metal conductive shaft is made of conductive metal materials, a length mark is engraved on a curved surface of the metal conductive shaft, an initial scale value of the length mark is a length value of the sum of thicknesses of the left slider and the right slider, the scale values of the marks are sequentially increased from left to right, a contact surface of the right slider and the metal conductive shaft is insulated, and a threaded through hole matched with a threaded knob is formed in the right slider.

Preferably, the left binding post is connected with two left electromagnetic control valves through a wire, and the right binding post is connected with two left electromagnetic control valves through a wire.

The beneficial effects of the invention are as follows:

1. according to the invention, through the arrangement of the distance control mechanism, the metal conductive shaft is adjusted to the target scale position needing to be moved, the threaded knob is screwed again to fix the metal conductive shaft, the left slider and the right slider are adjusted to be attached to the cross section of the steel rail, the right binding post and the left binding post are connected with the electromagnetic control valve through wires, the hydraulic telescopic rod is controlled to move the steel rail, when the metal conductive shaft is contacted with the contact seat, the electromagnetic control valve is closed, so that the hydraulic telescopic rod is stopped from shortening, the distance between the two steel rails is adjusted to the target distance at one time, and the problems that the conventional steel rail needs to be adjusted by multiple laser measurement when being adjusted to the target distance, and the working efficiency is reduced are solved.

2. Secondly, the existing hydraulic rail stretcher clamps the rail mainly by the friction between the oblique iron and the rail, and the rail is clamped and clamped by the cooperation of the clamp and the oblique iron in the stretching process, so that the sliding friction between the oblique iron and the rail is changed into static friction. In the whole moving process, the acting force between the thinner end of the oblique iron and the steel rail is larger, the abrasion is more serious, the service life is longer, and the service life is shorter. According to the invention, the contact bent block and the inclined block can be disassembled, and when the end with large acting force is worn seriously, the contact bent block can be replaced with the opposite side contact bent block, so that the other end with small wearing is used as the end with large acting force in the next use, the service life of the contact bent block is greatly prolonged, and the use cost of the hydraulic steel rail stretcher is saved.

3. In the existing long rail laying process, gaps are reserved and holes are punched on rail webs to release energy generated by thermal expansion and cold contraction of the steel rail, but at the steel rail joints, the stability of the steel rail is poor, the clamping plates of the steel rail joints are required to be fixed, and the contact area of the existing clamp can be reduced due to the existence of the rail web through holes, so that the relative sliding is easier to occur. According to the invention, through the arrangement of the T-shaped shaft, when the long rail is paved on the steel rail, the T-shaped shaft can be penetrated into the through hole formed in the rail web, so that the contact area is increased, the steel rail and the clamping mechanism can not slide relatively, and the stability of the clamping mechanism is improved.

Drawings

FIG. 1 is a schematic view of the appearance structure of the present invention;

FIG. 2 is an enlarged schematic view of the invention at A in FIG. 2;

FIG. 3 is a top view of the structure of the present invention;

FIG. 4 is an enlarged schematic view of the invention at B in FIG. 3;

FIG. 5 is a schematic view of a clamping structure in semi-section according to the present invention;

fig. 6 is an enlarged schematic view of fig. 5 at C in accordance with the present invention.

In the figure: 1. a hydraulic telescopic rod; 2. an electromagnetic control valve; 3. rectangular protrusions; 4. a U-shaped protrusion; 5. a fixing pin; 6. a clamping mechanism; 61. a housing; 62. a mounting cavity; 63. a sloping block; 64. contacting the curved block; 65. a hydraulic housing; 66. a T-shaped shaft; 67. a compression spring; 7. a connecting pipe; 8. a distance control mechanism; 81. a connecting shaft; 82. a right slider; 83. a metal conductive shaft; 84. a right binding post; 85. a fixed block; 86. a threaded knob; 87. a left slider; 88. a contact base; 89. and a left binding post.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 6, the embodiment of the invention provides a hydraulic rail stretcher, which comprises a hydraulic telescopic rod 1, wherein electromagnetic control valves 2 are fixedly arranged at the left side and the right side of the top of the two hydraulic telescopic rods 1, a rectangular bulge 3 is slidably arranged at the right end of the hydraulic telescopic rod 1, a fixing pin 5 is movably sleeved at the middle part of the rectangular bulge 3, a fixing pin 5 is movably sleeved at the middle part of a U-shaped bulge 4,U-shaped bulge 4 which is slidably arranged at the left side of the hydraulic telescopic rod 1, and the hydraulic rail stretcher further comprises

The clamping mechanism 6, the right side clamping mechanism 6 is fixedly connected between two rectangular bulges 3, the left side clamping mechanism 6 is fixedly connected between two U-shaped bulges 4, the clamping mechanism 6 comprises a shell 61 and two inclined blocks 63, the bottom of the shell 61 is provided with a mounting cavity 62, the inner sides of the two inclined blocks 63 are respectively and slidably provided with a contact curved block 64, the outer sides of the two inclined blocks 63 are respectively and fixedly provided with a hydraulic shell 65, the middle part of the hydraulic shell 65 is movably sleeved with a T-shaped shaft 66, and the middle part of the T-shaped shaft 66 is fixedly provided with a compression spring 67 fixedly connected with the hydraulic shell 65;

the connecting pipes 7, the two connecting pipes 7 are respectively clamped above the opposite sides of the two shells 61;

and the distance control mechanism 8, two ends of the distance control mechanism 8 are movably sleeved at the middle parts of the two connecting pipes 7.

Wherein, distance control mechanism 8 includes connecting axle 81, right sliding piece 82 has been cup jointed in the right part slip of connecting axle 81, right sliding piece 82's middle part movable mounting has metal conductive shaft 83, metal conductive shaft 83's right-hand member fixedly connected with right terminal 84, metal conductive shaft 83's curved surface top is provided with fixed block 85, equal threaded connection has screw knob 86 around the fixed block 85, left sliding piece 87 has been cup jointed in the left part slip of connecting axle 81, left sliding piece 87's middle part fixed mounting has contact seat 88, contact seat 88's left side fixedly connected with left terminal 89.

The outer sides of the electromagnetic control valves 2 are respectively provided with a first grabbing handrail fixedly connected with the hydraulic telescopic rod 1, and a second grabbing handrail is respectively arranged at the front and rear sides of the upper surface of the shell 61.

Wherein, the inside opening of installation cavity 62 is bigger than the outside opening, and the face of installation cavity 62 and sloping block 63 contact is the inclined plane, and the degree of depth of installation cavity 62 equals the height of rail, and the through-hole that is equal with T shape axle 66 one end diameter far away from hydraulic pressure shell 65 is seted up at the middle part of sloping block 63.

The curved surface of the contact curved block 64 is in fit and abutting connection with the curved surface of the steel rail, and a through hole with the same diameter as that of one end, far away from the hydraulic shell 65, of the T-shaped shaft 66 is formed in the middle of the contact curved block 64, and the through hole penetrates through the contact curved block 64 through the T-shaped shaft, so that the contact curved block 64 and the inclined block 63 are limited.

The metal conductive shaft 83 is made of conductive metal material, a length mark is carved on a curved surface of the metal conductive shaft 83, an initial scale value of the length mark is a length value of the sum of thicknesses of the left slider 87 and the right slider 82, and scale values marked from left to right are sequentially increased, a contact surface of the right slider 82 and the metal conductive shaft 83 is insulated, a threaded through hole matched with a threaded knob 86 is formed in the right slider 82, and the effect is that the left side edge scale of the right slider 82 is controlled by adjusting the metal conductive shaft 83 to control the left distance of a steel rail when the steel rail is pulled.

The left binding post 89 is connected with the two left electromagnetic control valves 2 through wires, the right binding post 84 is connected with the two left electromagnetic control valves 2 through wires, the left binding post 89 is fixedly connected with the contact seat 88, the right binding post 84 is fixedly connected with the metal conductive shaft 83, and when the metal conductive shaft 83 and the contact seat 88 are in contact, the electromagnetic control valves 2 which can control the opening state are closed immediately, so that the hydraulic telescopic rod 1 stops telescoping.

Working principle:

before use, the oil pipe orifice of the oil supply system is communicated with the electromagnetic control valves 2 on all the hydraulic telescopic rods 1 and the oil inlets on the hydraulic shell 65, the oil supply system supplies oil to the hydraulic shell 65, so that the T-shaped shaft 66 moves inwards and presses the compression spring 67, and when one end of the T-shaped shaft 66 far away from the hydraulic shell 65 is positioned in the middle of the contact bent block 64, the oil supply is stopped;

when the steel rail is pulled out, a connecting pipe 7 and a distance control mechanism 8 are installed, a right side shell 61 is placed on the steel rail on the left side which needs to be pulled out from the upper side of the steel rail, two contact bent blocks 64 which are installed in a sliding mode and inclined blocks 63 with T-shaped shafts 66 which are adjusted are arranged in a sliding mode, the steel rail is attached to the left side of the right side shell 61 and slowly slides into an installation cavity 62, the steel rail is clamped in the middle of the shell 61, an oil supply system supplies oil to a hydraulic shell 65, the T-shaped shafts 66 move inwards until being attached to the steel rail, and oil supply is stopped after attaching; one end of the front and rear hydraulic telescopic rod 1 is contacted with the front and rear rectangular bulges 3 of the right side shell 61 and is fixed by a fixing pin 5; the left shell 61 is placed on the right steel rail to be pulled away from the upper part of the steel rail, the steel rail is positioned in the middle of the left shell 61, two contact bent blocks 64 which are installed in a sliding way and inclined blocks 63 of a T-shaped shaft 66 which are adjusted are arranged on the left shell 61, the attached steel rail slowly slides into an installation cavity 62 from the right side of the left shell 61, the steel rail is clamped in the middle part of the shell 61, an oil supply system supplies oil to a hydraulic shell 65, the T-shaped shaft 66 moves inwards until being attached to the steel rail, oil supply is stopped after attaching, and one end of a front-rear hydraulic telescopic rod 1 is contacted with U-shaped bulges 4 at the front-rear part of the left shell 61 and is fixed through a fixing pin 5; the oil supply system supplies oil to the hydraulic telescopic rod 1 through the electromagnetic control valve 2, so that the steel rails move to two sides, and the two steel rails are separated; if the contact curved block 64 and the inclined block 63 slide with the steel rail in the process, the steel rail is held closer due to the inclined surface contacted by the shell 61 and the contact curved block 64, so that the sliding is prevented;

when the steel rail is pulled to be close, the right side shell 61 is placed on the right side steel rail, the left side shell 61 is placed on the left side steel rail, the hydraulic telescopic rod 1, the contact bent block 64 and the inclined block 63 are fixed in the same mode through the steel rail pulling operation, the steel rail is fixed in the middle of the left side shell 61 and the right side shell 61, the connecting pipe 7 and the distance control mechanism 8 are clamped on the left side shell 61 and the right side shell 61, the metal conductive shaft 83 is adjusted to the interval scale where the two steel rails finally need to be adjusted, the screw knob 86 is screwed to fix the metal conductive shaft 83, the right side of the lower end of the right sliding piece 82 is attached to the cross section of the right side steel rail, and the left side of the lower end of the left sliding piece 87 is attached to the cross section of the left side steel rail; the right binding post 84 and the left binding post 89 are connected with the electromagnetic control valve 2 through wires, the oil supply system supplies oil to the hydraulic telescopic rod 1 through the electromagnetic control valve 2, so that the steel rails move to the middle part, the distance between the two steel rails is shortened, when the left end of the metal conductive shaft 83 is contacted with the right end of the contact seat 88, the electromagnetic control valve 2 is closed, oil in the oil supply system is prevented from entering the hydraulic telescopic rod 1, and the drawing work between the two steel rails is completed; if the contact curved block 64 and the inclined block 63 slide with the steel rail in the process, the steel rail is held closer due to the inclined surface contacted by the shell 61 and the contact curved block 64, so that the sliding is prevented;

if the clamped steel rail is provided with a through hole, the T-shaped shaft 66 is aligned with the through hole, one end, far away from the hydraulic shell 65, of the T-shaped shaft 66, which is supplied to the hydraulic shell 65 by an oil supply system, enters the inside of the through hole of the steel rail, and is further fixed, so that sliding between the contact bent block 64 and the steel rail is prevented;

after the work is completed, the connecting pipe 7 and the distance control mechanism 8 are disassembled, the fixing pin 5 is extracted, the hydraulic telescopic rod 1 is disassembled, and finally the inclined block 63, the contact bent block 64 and the steel rail are loosened by moving the shell 61.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A hydraulic rail stretcher, comprising a hydraulic telescopic rod (1), characterized in that: two electromagnetic control valves (2) are fixedly installed on the left side and the right side of the top of the hydraulic telescopic rod (1), rectangular protrusions (3) are slidably installed at the right end of the hydraulic telescopic rod (1), fixing pins (5) are movably sleeved at the middle parts of the rectangular protrusions (3), U-shaped protrusions (4) are installed at the left sides of the hydraulic telescopic rod (1), fixing pins (5) are movably sleeved at the middle parts of the U-shaped protrusions (4), and the hydraulic telescopic rod further comprises

The clamping mechanism (6), the right side clamping mechanism (6) fixed connection is between two rectangle protruding (3), the left side clamping mechanism (6) fixed connection is between two U-shaped protruding (4), clamping mechanism (6) are including casing (61), two sloping blocks (63), installation cavity (62) have been seted up to the bottom of casing (61), two the inboard of sloping block (63) is all slidable mounting has contact bent piece (64), two the outside of sloping block (63) is all fixed mounting has hydraulic shell (65), T shape axle (66) have been cup jointed in the middle part activity of hydraulic shell (65), compression spring (67) have in the middle part fixed mounting of T shape axle (66);

the two connecting pipes (7) are respectively clamped above one side opposite to the two shells (61);

the two ends of the distance control mechanism (8) are movably sleeved at the middle parts of the two connecting pipes (7).

2. A hydraulic rail stretcher according to claim 1 characterized in that: the distance control mechanism (8) comprises a connecting shaft (81), a right sliding piece (82) is sleeved on the right part of the connecting shaft (81) in a sliding manner, a metal conductive shaft (83) is movably mounted in the middle of the right sliding piece (82), the right end of the metal conductive shaft (83) is fixedly connected with a right binding post (84), a fixing block (85) is arranged above a curved surface of the metal conductive shaft (83), screw knobs (86) are uniformly connected with the front and rear parts of the fixing block (85) in a threaded manner, a left sliding piece (87) is sleeved on the left part of the connecting shaft (81) in a sliding manner, a contact seat (88) is fixedly mounted in the middle of the left sliding piece (87), and a left binding post (89) is fixedly connected to the left side of the contact seat (88).

3. A hydraulic rail stretcher according to claim 1 characterized in that: the outside of electromagnetic control valve (2) all is provided with snatchs handrail one with hydraulic telescoping rod (1) fixed connection, the front and back of the upper surface of casing (61) all is equipped with snatchs handrail two.

4. A hydraulic rail stretcher according to claim 1 characterized in that: the inside opening of installation cavity (62) is bigger than outside opening, the face that installation cavity (62) and sloping block (63) contacted is the inclined plane, the degree of depth of installation cavity (62) equals the height of rail, the through-hole that keeps away from hydraulic pressure shell (65) one end diameter equal with T shape axle (66) is seted up at the middle part of sloping block (63).

5. A hydraulic rail stretcher according to claim 1 characterized in that: the curved surface of the contact curved block (64) is in fit and abutting connection with the curved surface of the steel rail, and a through hole with the same diameter as one end, far away from the hydraulic shell (65), of the T-shaped shaft (66) is formed in the middle of the contact curved block (64).

6. A hydraulic rail stretcher as claimed in claim 2, wherein: the metal conductive shaft (83) is made of conductive metal materials, a length mark is engraved on the curved surface of the metal conductive shaft (83), the initial scale value of the length mark is the sum of the thicknesses of the left sliding piece (87) and the right sliding piece (82), the scale value of the mark is sequentially increased from left to right, the contact surface of the right sliding piece (82) and the metal conductive shaft (83) is insulated, and a threaded through hole matched with a threaded knob (86) is formed in the right sliding piece (82).

7. A hydraulic rail stretcher as claimed in claim 2, wherein: the left binding post (89) is connected with two left electromagnetic control valves (2) through a wire, and the right binding post (84) is connected with two left electromagnetic control valves (2) through a wire.