CN118358969A - Automatic demoulding and conveying equipment and method for sleeper production line - Google Patents

Abstract

The invention discloses an automatic demolding and conveying device and method for sleeper production lines, wherein the device comprises the following components: a sleeper mold conveyor belt, which is disposed obliquely; the turnover structure comprises a turnover motor, a turnover device, a conveying roller and a buffer device, wherein the turnover device is rotatably arranged on a support, the turnover motor is fixedly arranged on the support, the turnover device is obliquely arranged at the tail end of a sleeper die conveying belt, the bottom of a turnover groove of the turnover device is opposite to the position of the sleeper die conveying belt, the turnover motor is connected with the turnover device to turn over the turnover device by 180 degrees, the conveying roller is arranged below the turnover device, and the buffer device is arranged below the turnover device and between the conveying rollers. The invention can realize the overturning and conveying of the sleeper die and improve the demoulding efficiency of the sleeper die.

Description

Automatic demoulding and conveying equipment and method for sleeper production line

Technical Field

The present invention belongs to the field of railway sleeper production, and more specifically, relates to an automatic demoulding and conveying device and method for a sleeper production line.

Background technique

The sleeper is also called the sleeper, which is also a kind of railway accessories. However, the material used is not only wood, so it is more scientific to call it a sleeper. Nowadays, reinforced concrete sleepers are commonly used. When producing this type of sleeper, steel bars are set in the steel mold, concrete is injected into the mold, and then the molded sleeper product is separated from the mold.

Patent publication number CN117381965A discloses an automatic demoulding and conveying equipment for sleeper production, including a support base; a flip bottom plate is arranged at one end of the support base, a material guide box is connected to the flip bottom plate, and a vibration demoulding assembly is arranged on the top of the material guide box. In the demoulding process, the production mold is inverted in the space surrounded by the lifting limit frame and the annular support plate, and then the rotating cam is operated to continuously push the vibration cross plate to rise. Each time the vibration cross plate rises, it drives the production mold placed thereto to rise together, and then falls and hits the material guide box by gravity, and vibration is generated by the falling impact, so as to facilitate vibration demoulding. The demoulded sleeper body falls on the conveying support plate in the material guide box, and then the conveying support plate slides off the material guide box by gravity, and then tilts the sleeper body to the conveyor belt assembly, thereby completing the automatic demoulding and conveying, without the need for manual demoulding and handling, and improving the convenience of demoulding operation. This patent application realizes the automatic demoulding of the sleeper, but this patent application cannot realize the flipping of the sleeper mold, so that the degree of automation of demoulding is not high enough.

Summary of the invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

An object of the present invention is to provide an automatic demoulding and conveying device for a sleeper production line, which can realize the flipping and conveying of the sleeper mold and improve the demoulding efficiency of the sleeper mold.

In order to achieve these purposes and other advantages of the present invention, an automatic demoulding and conveying device for a sleeper production line is provided, which comprises:

sleeper mould conveyor belt, which is set at an angle;

The flipping structure comprises a flipping motor, a flipping device, a conveying roller and a buffer device. The flipping device is rotatably arranged on a bracket, the flipping motor is fixedly arranged on the bracket, the flipping device is tilted at the end of the sleeper mold conveyor belt, and the bottom of the flipping groove of the flipping device is opposite to the position of the sleeper mold conveyor belt. The flipping motor is connected to the flipping device to flip the flipping device 180°, the conveying roller is arranged below the flipping device, and the buffer device is arranged below the flipping device and between the conveying rollers.

Preferably, the turnover trough comprises a support plate and a vertical plate, the vertical plate is vertically arranged on the support plate so that the turnover trough has an L-shaped structure, and the horizontal portion of the L of the turnover trough is on the same plane as the sleeper mold conveyor belt.

Preferably, side plates are provided at both ends of the flip groove, and a first limit member and a second limit member are provided above the side plates. After the sleeper mold moves to the flip groove, the first limit member abuts against the upper end of the sleeper mold to limit the sleeper mold in the flip groove when the flip groove flips, and the second limit member abuts against the sleeper in the sleeper mold to limit the sleeper in the sleeper mold when the flip groove flips.

Preferably, the first limiting member and the second limiting member are telescopic devices.

Preferably, the buffer device includes an oil tank, a fixed cylinder and a telescopic cylinder, the telescopic cylinder is slidably mounted in the fixed cylinder, the oil tank is connected to the fixed cylinder, the interior of the oil tank, the fixed cylinder and the telescopic cylinder are filled with hydraulic oil, and an oil pressure device is provided in the oil tank to pressurize the hydraulic oil in the oil tank to the telescopic cylinder and the fixed cylinder.

Preferably, the oil pressure device comprises:

a piston disposed in the oil tank;

A spring, one end of which is connected to the piston, and the other end of which is connected to the tank wall of the oil tank;

The spring is in a compressed state to press the hydraulic oil in the oil tank into the telescopic cylinder and the fixed cylinder, so that the telescopic cylinder is higher than the conveying roller.

Preferably, a roller is provided on the top of the telescopic cylinder.

Preferably, it further comprises a positioning device, wherein the positioning device comprises:

A first positioning roller, which is arranged at the end of the conveying roller;

A first positioning member, which is arranged on both sides of the first positioning roller and has an eight-shaped structure, and an end of the first positioning member with a larger opening is opposite to the conveying roller;

A second positioning roller, which is arranged at the end of the second positioning roller;

The second positioning members are arranged on both sides of the second positioning roller and are arranged parallel to each other.

Preferably, it further comprises a sleeper mold transfer device, wherein the sleeper mold transfer device comprises:

A frame, which is arranged on the side of the flip structure;

A sliding structure, which is slidably arranged on the frame;

A transfer roller, which is arranged below the frame;

A supporting structure is arranged below the sliding structure and is staggered with the transfer roller. The supporting structure includes a vertical portion and a horizontal portion. The vertical portion of the supporting structure is fixedly connected to the sliding structure. The vertical portion of the supporting structure is a lifting device. The horizontal portion of the supporting structure is fixedly connected to the vertical portion of the supporting structure to form an L-shaped structure. The horizontal portion of the supporting structure is higher than the conveying roller.

The method for demoulding and transporting using an automatic demoulding and conveying device for a sleeper production line comprises the following steps:

1) The sleeper to be demoulded is transferred to the sleeper mold conveyor belt. The sleeper mold moves downward under the action of the sleeper mold conveyor belt and its own gravity and enters the turning groove. The first limiting member is extended to limit the sleeper mold in the turning groove. The second limiting member is extended and the sleeper mold is limited in the sleeper mold.

2) The turning motor turns the turning groove 180°, the second limiter shrinks, the sleeper falls off from the sleeper mold and onto the buffer device, the turning motor resets to prepare for the next turning of the sleeper, the buffer device moves downward under the gravity of the sleeper, the sleeper contacts the conveying roller, and the conveying roller conveys the sleeper to the positioning device to adjust the posture of the sleeper in preparation for transferring the sleeper to the material receiving plate;

3) After the sleeper falls off from the sleeper mould, the sliding structure moves to one side of the flipping structure so that the horizontal part of the supporting structure is located below the sleeper mould, the first limit piece contracts, the sleeper mould falls on the horizontal part of the supporting structure, the sliding structure moves to the side away from the flipping structure and is located above the transfer roller, the vertical part of the supporting structure descends to a height lower than the transfer roller, the transfer roller supports the sleeper mould and moves the sleeper mould away, and the vertical part of the supporting structure rises to prepare for the next transfer of the sleeper mould.

The present invention has at least the following beneficial effects:

First, the present invention utilizes a flipping structure to flip the sleeper mold, thereby realizing the separation of the sleeper mold from the sleeper, and utilizes a positioning device to adjust the posture of the sleeper so that the sleeper is aligned with an external receiving plate, so as to facilitate the transfer of the sleeper to the placement groove on the receiving plate, and utilizes a sleeper mold transfer device to transfer the sleeper mold from the flipping structure, thereby realizing the automatic separation and transportation of the sleeper mold from the sleeper.

Second, the present invention tilts the sleeper mold conveyor belt and the flipping structure, which can fully utilize the inertial force of the sleeper during movement to achieve the flipping of the sleeper, help reduce the output torque of the flipping motor, and reduce equipment requirements and energy consumption.

Third, after the sleeper is separated from the telescopic cylinder, the buffer device of the present invention takes a certain amount of time for the hydraulic oil in the oil tank to enter the fixed cylinder and the telescopic cylinder, so it takes a certain amount of time for the telescopic cylinder to reset upward, which provides time for the sleeper mold transfer device to transfer the sleeper mold and avoids the telescopic cylinder from interfering with the movement of the sleeper mold transfer device.

Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a flip structure of a technical solution of the present invention;

FIG2 is a schematic diagram of the structure of a device according to another technical solution of the present invention;

FIG3 is a schematic diagram of the structure of a sleeper supported on a buffer device in a technical solution of the present invention;

FIG. 4 is a side structural diagram of a technical solution of the present application.

1. Flipping device; 11. Support plate; 12. Vertical plate; 13. Side plate; 14. First position limiter; 15. Second position limiter; 2. Conveying roller; 3. Buffer device; 4. Bracket; 5. Positioning device; 51. First position adjusting roller; 52. First position adjusting member; 53. Second position adjusting roller; 54. Second position adjusting member; 6. Sleeper mold transfer device; 61. Frame; 62. Transfer roller; 63. Supporting structure; 631. Vertical part; 632. Horizontal part; 7. Sleeper; 81. Oil tank; 82. Telescopic cylinder; 83. Fixed cylinder; 84. Regulating valve; 85. Oil pipe; 86. Piston; 87. Spring.

Detailed ways

The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

As shown in Figures 1-4, the present invention provides an automatic demoulding and conveying device for a sleeper 7 production line, which includes:

A sleeper mould conveyor belt (not shown), which is arranged obliquely;

The flipping structure includes a flipping motor, a flipping device 1, a conveying roller 2 and a buffer device 3. The flipping device 1 is rotatably arranged on a bracket 4, the flipping motor is fixedly arranged on the bracket 4, the flipping device 1 is tilted at the end of the sleeper mold conveyor belt, and the bottom of the flipping groove of the flipping device 1 is opposite to the position of the sleeper mold conveyor belt, the flipping motor is connected to the flipping device 1 to flip the flipping device 1 180°, the conveying roller 2 is arranged below the flipping device 1, and the buffer device 3 is arranged below the flipping device 1 and between the conveying rollers 2.

In the present technical solution, the maximum inclination angle of the sleeper mold conveyor belt is preferably such that the sleeper mold does not slide relative to the conveyor belt, preferably, 10-20°. The sleeper mold conveyor belt can adopt the transmission structure disclosed in patent publication number CN219381018U, so as to realize that in the process of conveying the sleeper mold, the sleeper 7 is separated from the sleeper mold by continuous shaking, so as to facilitate the sleeper 7 to fall off from the sleeper mold in the later stage. The sleeper molds are placed on the sleeper mold conveyor belt at intervals to provide time for the flipping of the flipping structure, that is, the time taken for the flipping structure to flip and reset is less than the time for the next sleeper mold to move to the flipping device 1. Several conveying rollers 2 can be arranged at equal intervals below the flipping device 1, and the axial direction of the conveying roller 2 is perpendicular to the length direction of the sleeper mold, that is, the length direction of the sleeper 7. The slow release device can be a hydraulic buffer or a spring 87 buffer. The height of the buffer device 3 is higher than the conveying roller 2. The buffer device 3 moves downward under the gravity of the sleeper 7. When the sleeper 7 abuts on the conveying roller 2, the conveying roller 2 plays the role of supporting and conveying the sleeper 7.

The method of using the equipment of the present invention is as follows: after the maintenance of the sleepers is completed, the sleepers in the sleeper mold are transferred to the conveyor belt. At this time, the opening of the sleeper mold is upward, and the conveyor belt transfers the sleeper mold to the flipping structure. The flipping motor drives the flipping device to rotate 180° so that the opening of the sleeper mold is downward, and the flipping device releases the sleeper. The sleeper is separated from the sleeper mold under the action of its gravity and falls on the buffer device. The gravity of the sleeper is greater than the buffering force of the buffer device, so the sleeper slowly descends and contacts with the conveying roller, and the conveying roller conveys the sleeper to the next component.

The present invention tilts the sleeper mold conveyor belt and the flipping structure, which can fully utilize the inertial force of the sleeper during movement to flip the sleeper, which helps to reduce the output torque of the flipping motor, reduce equipment requirements and energy consumption. In addition, the present invention realizes the automatic flipping and conveying of the sleeper mold, and improves the automation level of the sleeper production line.

In another technical solution, the flip trough includes a support plate 11 and a vertical plate 12. The vertical plate 12 is vertically arranged on the support plate 11 so that the flip trough is L-shaped, and the horizontal part of the L of the flip trough is on the same plane as the sleeper mold conveyor belt. The support plate 11 is rotatably hinged on the bracket 4. When the sleeper 7 slides onto the support plate 11, the vertical plate 12 prevents the sleeper mold from detaching from the support plate 11. An in-place sensor can be arranged on the vertical plate 12. When the sleeper mold abuts against the in-place sensor, the flip motor drives the flip trough to flip downward along the movement direction of the sleeper mold.

In another technical solution, side plates 13 are provided at both ends of the reversing groove, and a first stopper 14 and a second stopper 15 are provided above the side plates 13. After the sleeper mold moves to the reversing groove, the first stopper 14 abuts against the upper end of the sleeper mold to limit the sleeper mold in the reversing groove when the reversing groove is turned over, and the second stopper 15 abuts against the sleeper 7 in the sleeper mold to limit the sleeper 7 in the sleeper mold when the reversing groove is turned over. Providing the side plates 13 on the reversing groove can play the role of limiting the sleeper mold. In other technical solutions, the side plates 13 may not be provided, and the first stopper 14 and the second stopper 15 may be provided on the vertical plate 12.

In another technical solution, the first limiting member 14 and the second limiting member 15 are telescopic devices, which can be pneumatic rods or hydraulic rods.

In another technical solution, the buffer device 3 includes an oil tank 81, a fixed cylinder 83 and a telescopic cylinder 82. The telescopic cylinder 82 is slidably sleeved in the fixed cylinder 83. The oil tank 81 is connected to the fixed cylinder 83 through an oil pipe 85. The interiors of the oil tank 81, the fixed cylinder 83 and the telescopic cylinder 82 are filled with hydraulic oil. The oil tank 81 is provided with an oil pressure device to press the hydraulic oil in the oil tank 81 to the telescopic cylinder 82 and the fixed cylinder 83. When the sleeper mold presses down the buffer device 3, the telescopic cylinder 82 and the fixed cylinder 83 are tightly connected through a sealing ring, and the hydraulic oil in the fixed cylinder 83 and the telescopic cylinder 82 enters the oil tank 81. After the sleeper mold is separated from the buffer device 3, the oil pressure device presses the hydraulic oil in the mailbox into the fixed cylinder 83 and the telescopic cylinder 82. In some technical solutions, a regulating valve 84 can be provided at the connection between the oil tank 81 and the fixed cylinder 83 to adjust the hydraulic oil passing rate. The regulating valve 84 is used to adjust the passing rate of the hydraulic oil to adjust the lifting rate of the telescopic cylinder 82. Each fixed cylinder 83 and telescopic cylinder 82 can be independently equipped with an oil tank 81 .

In another technical solution, the oil pressure device includes:

a piston 86 disposed in the oil tank 81;

A spring 87, one end of which is connected to the piston 86, and the other end of which is connected to the wall of the oil tank 81;

The spring 87 is in a compressed state to press the hydraulic oil in the oil tank 81 into the telescopic cylinder 82 and the fixed cylinder 83 , so that the telescopic cylinder 82 is higher than the conveying roller 2 .

Under the action of the gravity of the sleeper 7, the telescopic cylinder 82 moves downward, thereby pressing the hydraulic oil into the oil tank 81. At this time, the spring 87 is further compressed. After the sleeper 7 is separated from the telescopic cylinder 82, the spring 87 compresses the hydraulic oil in the oil tank 81 into the fixed cylinder 83 and the telescopic cylinder 82.

In another technical solution, a roller is provided on the top of the telescopic cylinder 82. By providing the roller, the sliding friction between the bottom of the sleeper 7 and the telescopic cylinder 82 is converted into rolling friction, thereby reducing the resistance of the sleeper 7 to movement.

In another technical solution, a positioning device 5 is also included, and the positioning device 5 includes:

A first positioning roller 51, which is arranged at the end of the conveying roller 2;

A first positioning member 52, which is disposed on both sides of the first positioning roller 51 and has an eight-shaped structure, and an end of the first positioning member 52 with a larger opening is opposite to the conveying roller 2;

A second positioning roller 53, which is arranged at the end of the second positioning roller 53;

The second positioning members 54 are disposed on both sides of the second positioning roller 53 and are parallel to each other.

The positioning device 5 of the present technical solution can adjust the posture of the sleeper 7 to be opposite to the placement groove on the external material receiving plate, so as to facilitate the placement of the sleeper 7 in the placement groove. For example, the material receiving plate adopts the structure disclosed in patent publication number CN117445170A. The first positioning member 52 and the second positioning member 54 can be positioning transmission belts, the movement direction of the belts is the same as the movement direction of the sleeper 7, and the belt surface of the transmission belt is perpendicular to the plane where the first positioning roller 51 is located.

In another technical solution, a sleeper mold transfer device 6 is also included, and the sleeper mold transfer device 6 includes:

A frame 61, which is arranged on the side of the flip structure;

A sliding structure, which is slidably disposed on the frame 61;

A transfer roller 62, which is arranged below the frame 61;

The supporting structure 63 is arranged below the sliding structure and staggered with the transfer roller 62. The supporting structure 63 includes a vertical portion 631 and a horizontal portion 632. The vertical portion of the supporting structure 63 is fixedly connected to the sliding structure. The vertical portion 631 of the supporting structure 63 is a lifting device. The horizontal portion 632 of the supporting structure is fixedly connected to the vertical portion 631 of the supporting structure to form an L-shaped structure. The horizontal portion 632 of the supporting structure is higher than the conveying roller. After the sleeper 7 is separated from the sleeper mold, the sliding structure moves toward the flipping structure to move the horizontal portion 632 of the supporting structure 63 to the bottom of the sleeper mold. The first limiter 14 is actuated to make the sleeper mold separate from the flipping groove and fall on the horizontal portion 632 of the supporting structure 63. The sliding structure moves to the top of the transfer roller 62, the vertical portion 631 of the supporting structure 63 descends, the transfer roller 62 transfers the sleeper mold, and the supporting structure 63 is reset. The vertical portion 631 of the supporting structure 63 can be a hydraulic telescopic rod, a start telescopic rod, etc. In some technical solutions, the horizontal portion 632 of the supporting structure 63 may be lower than the height of the telescopic cylinder 82 when it is fully extended, and the regulating valve 84 is used to adjust the flow rate of the hydraulic oil to achieve the purpose of slowly rising the telescopic cylinder 82, thereby providing time for the transfer device to transfer the sleeper mold. That is, when the sleeper mold transfer device 6 completely completes the transfer of the sleeper mold, the telescopic cylinder 82 has not yet been extended upward to touch the sleeper mold.

The method for demoulding and transporting using the automatic demoulding and conveying equipment of the sleeper 7 production line comprises the following steps:

1) The sleeper 7 to be demoulded is transferred to the sleeper mold conveyor belt. The sleeper mold moves downward under the action of the sleeper mold conveyor belt and its own gravity and enters the turning groove. The first stopper 14 is extended to limit the sleeper mold in the turning groove. The second stopper 15 is extended and the sleeper mold is limited in the sleeper mold.

2) The turning motor turns the turning groove 180°, the second stopper 15 contracts, the sleeper 7 falls off from the sleeper mold onto the buffer device 3, the buffer device 3 moves downward under the gravity of the sleeper 7, the sleeper 7 contacts the conveying roller 2, and the conveying roller 2 conveys the sleeper 7 to the positioning device 5 to adjust the posture of the sleeper 7 in preparation for transferring the sleeper 7 to the material receiving plate;

3) After the sleeper 7 falls off from the sleeper mould, the sliding structure moves to one side of the flipping structure so that the transverse portion 632 of the supporting structure 63 is located below the sleeper mould, the first limit member 14 contracts, the sleeper mould falls on the transverse portion 632 of the supporting structure 63, the sliding structure moves to the side away from the flipping structure and is located above the transfer roller 62, the vertical portion 631 of the supporting structure 63 drops to a height lower than the transfer roller 62, the transfer roller 62 supports the sleeper mould and moves the sleeper mould away, the vertical portion 631 of the supporting structure 63 rises to prepare for the next transfer of the sleeper mould; the flipping motor is reset to prepare for the next flipping of the sleeper 7.

Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims (10)

1. Automatic demolding conveying equipment for sleeper production line, its characterized in that includes:

A sleeper mold conveyor belt, which is disposed obliquely;

The turnover structure comprises a turnover motor, a turnover device, a conveying roller and a buffer device, wherein the turnover device is rotatably arranged on a support, the turnover motor is fixedly arranged on the support, the turnover device is obliquely arranged at the tail end of a sleeper die conveying belt, the bottom of a turnover groove of the turnover device is opposite to the position of the sleeper die conveying belt, the turnover motor is connected with the turnover device to turn over the turnover device by 180 degrees, the conveying roller is arranged below the turnover device, and the buffer device is arranged below the turnover device and between the conveying rollers.

2. The automatic demolding and conveying device for sleeper production lines according to claim 1, wherein the turnover groove of the turnover device comprises a supporting plate and a vertical plate, the vertical plate is vertically arranged on the supporting plate so that the turnover groove is of an L-shaped structure, and the transverse part of the L of the turnover groove is on the same plane with the sleeper mold conveying belt.

3. The automatic demolding and conveying device for the sleeper production line according to claim 1, wherein side plates are arranged at two ends of the overturning groove, a first limiting piece and a second limiting piece are arranged above the side plates, after the sleeper mold moves to the overturning groove, the first limiting piece abuts against the upper end of the sleeper mold to limit the sleeper mold in the overturning groove when the overturning groove overturns, and the second limiting piece abuts against the sleeper in the sleeper mold to limit the sleeper in the sleeper mold when the overturning groove overturns.

4. An automatic demolding and conveying device for sleeper production lines according to claim 3, wherein the first limiting piece and the second limiting piece are telescopic devices.

5. The automatic demolding and conveying device for the sleeper production line according to claim 1, wherein the buffering device comprises an oil tank, a fixed cylinder and a telescopic cylinder, the telescopic cylinder is slidably sleeved in the fixed cylinder, the oil tank is communicated with the fixed cylinder through an oil pipe, hydraulic oil is filled in the oil tank, the fixed cylinder and the telescopic cylinder, and a pressure oil device is arranged in the oil tank to press and convey the hydraulic oil in the oil tank to the telescopic cylinder and the fixed cylinder.

6. The automatic demolding and conveying device for sleeper production lines according to claim 5, wherein the pressure oil device comprises:

A piston disposed in the oil tank;

One end of the spring is connected with the piston, and the other end of the spring is connected with the wall of the oil tank;

The spring is in a compressed state to press hydraulic oil in the oil tank into the telescopic cylinder and the fixed cylinder so that the telescopic cylinder is higher than the conveying roller.

7. The automatic demolding and conveying device for sleeper production lines according to claim 5, wherein a roller is arranged at the top of the telescopic cylinder.

8. The automatic demolding and conveying apparatus for a tie production line of claim 1, further comprising a positioning device, the positioning device comprising:

a first positioning roller arranged at the tail end of the conveying roller;

the first positioning pieces are arranged on two sides of the first positioning roller and are of splayed structures, and the larger end of each first positioning piece is opposite to the position of the conveying roller;

The second positioning roller is arranged at the tail end of the second positioning roller;

The second positioning pieces are arranged on two sides of the second positioning roller and are arranged in parallel.

9. The automatic demolding and conveying apparatus for a tie production line of claim 1, further comprising a tie mold transfer device, the tie mold transfer device comprising:

a frame disposed at a side of the turnover structure;

the sliding structure is slidably arranged on the rack;

a transfer roller disposed below the frame;

the bearing structure is arranged below the sliding structure and is arranged in a dislocation mode with the transfer roller, the bearing structure comprises a vertical portion and a horizontal portion, the vertical portion of the bearing structure is fixedly connected with the sliding structure, the vertical portion of the bearing structure is a lifting device, the horizontal portion of the bearing structure is fixedly connected with the vertical portion of the bearing structure to form an L-shaped structure, and the horizontal portion of the bearing structure is higher than the conveying roller.

10. Method for demoulding and transferring by means of an automatic demoulding and conveying device for sleeper production lines according to any of the claims 1-9, characterized in that it comprises the following steps:

1) Transferring the sleeper to be demolded onto a sleeper mould conveying belt, enabling the sleeper mould to move downwards under the action of the sleeper mould conveying belt and the gravity of the sleeper mould conveying belt and enter a turnover groove, enabling a first limiting piece to stretch to limit the sleeper mould in the turnover groove, enabling a second limiting piece to stretch and enabling the sleeper mould to be limited in the sleeper mould;

2) The overturning motor overturns the overturning groove by 180 degrees, the second limiting piece contracts, the sleeper falls off from the sleeper die to the buffer device, the overturning motor resets to prepare for overturning the sleeper next time, the buffer device moves downwards under the action of the sleeper gravity, the sleeper contacts with the conveying roller, the conveying roller conveys the sleeper to the positioning device, and the sleeper posture is adjusted to prepare for transferring the sleeper to the material bearing plate;

3) After the sleeper falls from the sleeper mould, the sliding structure moves to one side of the turnover structure so that the transverse part of the bearing structure is arranged below the sleeper mould, the first limiting piece is contracted, the sleeper mould falls on the transverse part of the bearing structure, the sliding structure moves to one side far away from the turnover structure and is positioned above the transfer roller, the vertical part of the bearing structure descends to a height lower than the transfer roller, the transfer roller supports the sleeper mould and removes the sleeper mould, and the vertical part of the bearing structure is lifted to prepare for transferring the sleeper mould next time.