Synchronization structure suitable for large-span half-door type scraper reclaimer in stockyard

Abstract

The synchronous structure comprises a fixed end beam, a swing end beam and a portal frame, one end of the portal frame is in rigid connection with the fixed end beam, the other end of the portal frame is connected with the swing end beam, a flange is arranged at the end, close to the swing end beam, of the portal frame, a hinged support is installed on the corresponding side of the swing end beam, and the hinged support is connected with the fixed end beam. The top of the hinged support is connected with the flange; the front and rear ends of the fixed end beam and the swing end beam are respectively provided with a plurality of pairs of catch wheels which are horizontally arranged; the hinged support enables the swing end beam to have the degree of freedom of relative rotation relative to the portal frame, and the direction of a relative rotation shaft is parallel to the length direction of the swing end beam. According to the invention, the hinged support and the flange are arranged between the gantry and the swinging end beam, so that continuously changing micro deflection angles on the swinging end beam side at different positions in the process of hoisting the material taking arm by the gantry can be compensated; and the difference, caused by different thermal expansion coefficients of the civil engineering foundation and the steel structure, of the civil engineering span and the equipment span in different temperature environments can be compensated.

Description

Technical Field

[0001] The present invention relates to a synchronous structure of a reclaimer, and particularly to a synchronous structure applicable to a semi-gantry scraper reclaimer with a large span in a stockyard. Background Art

[0002] The semi-gantry scraper reclaimer is a pre-homogenization device for handling bulk materials in a long-shaped stockyard, and it is widely used in factories such as steel plants, cement plants, and chemical plants that have requirements for stacking bulk materials. The semi-gantry scraper reclaimer is used in conjunction with a discharging overhead crane, and the stacking of the overhead crane and the reclaiming of the reclaimer do not interfere with each other and can be carried out simultaneously, with relatively high production efficiency. Compared with a side-type scraper reclaimer, the semi-gantry reclaimer has the characteristics of a large span, a large storage capacity, a high output, and a small overall machine load. The equipment mainly consists of a reclaiming arm, a gantry, a hoisting device, a fixed end beam, a swinging end beam, etc., and the swinging end beam is located on the track at a high position of the retaining wall. When working, the trolley of the semi-gantry reclaimer travels along the track laid in the length direction of the stockyard, and the scraper system is driven by a motor to drive a reducer to drive a sprocket and drive the scraper chain to scrape materials; the walking end beam supports the weight of the whole machine and realizes shunting and working operation. The hoisting device is used to realize the luffing of the reclaiming arm. An encoder is provided inside, which can memorize the position angle of the material taking surface of any stockpile. At the same time, it is also used to realize that the pitching down angle changes according to the characteristics of the gradual change of the material layer cross-section, so as to realize a constant reclaiming capacity. When reclaiming, the reclaiming arm floats on the stockpile, and the suspension angle of the boom is changed according to the predetermined cutting depth to realize the predetermined reclaiming amount. The fixed walking end beam is a fixed connection structure between the walking end beam and the gantry and cannot move relatively. The swinging walking end beam can swing relatively between the walking end beam and the gantry. When the semi-gantry reclaimer is walking, due to manufacturing and installation errors, as well as actual friction, resistance, motor and frequency converter errors, etc., the swinging end beam and the fixed end beam do not walk synchronously, resulting in the deflection of the walking beam and the gantry.

[0003] The connection between the gantry and the swing end beam of a general semi-gantry reclaimer usually adopts a spherical hinge bearing connection. To solve the problem of asynchronous movement of the two walking end beams, a relatively complex detection device for measuring the relative angle between the gantry and the swing end beam is set on the side of the swing end beam. It is used to measure the deflection degree between the gantry and the swing end beam of the reclaimer. If the deflection degree is greater than the set value, the deviation rectification device will issue corresponding instructions according to the feedback signal of the deviation rectification switch to accelerate the drive of the swing end beam or the fixed end beam. When the feedback value of the deviation rectification switch reaches zero, the semi-gantry reclaimer stops deviation rectification, thus ensuring the synchronization of the two walking end beams. To achieve this goal, not only a deviation detection device and a corresponding electric control feedback device are required. More importantly, during the production and use of the equipment, due to reasons such as the loosening of the installation screws of the deviation rectification switch caused by the vibration of the equipment itself, maintenance negligence, and changes in the on-site working conditions, the installation position of the deviation rectification switch changes or the set value deviates from the actual value, resulting in the loss of the zero position of the gantry beam of the original semi-gantry reclaimer, and the inaccuracy of the original set deviation rectification range. The actual performance is that the equipment often stops due to deviation rectification failures, the equipment gnaws the rail during deviation rectification, the walking motor is overloaded, the equipment climbs the rail, and the wheel flange is damaged. And after the zero position is lost, it will take a lot of maintenance time to find the zero position on-site, affecting the use and production of users. In particular, for large-scale semi-gantry scraper reclaimers, because of their large span and large height difference between the fixed end beam and the swing end beam, it is easier to occur faults such as asynchronous movement of the two walking beams and rail gnawing. Summary of the Invention

[0004] Object of the Invention: The object of the present invention is to provide a synchronization structure applicable to a large-span semi-gantry scraper reclaimer in a stockyard to solve the problem of asynchronous movement of the two walking mechanisms of the semi-gantry scraper reclaimer in a long-shaped stockyard.

[0005] Technical Solution: The present invention includes a fixed end beam, a swing end beam, and a gantry. One end of the gantry is rigidly connected to the fixed end beam, and the other end of the gantry is connected to the swing end beam. A flange is provided at one end of the gantry close to the swing end beam, and a hinge support is installed on the corresponding side of the swing end beam. The top of the hinge support is connected to the flange; several pairs of horizontally arranged retaining wheels are respectively provided at the front and rear ends of the fixed end beam and the swing end beam.

[0006] The hinge support enables the swing end beam to have a relative rotation degree of freedom with respect to the gantry, and the direction of the relative rotation axis is parallel to the length direction of the swing end beam. It can not only compensate for the continuously changing small deflection angles on the swing end beam side at different positions during the process of the gantry lifting the reclaiming arm, but also compensate for the differences in the civil engineering span and the equipment span under different temperature environments caused by different thermal expansion coefficients of the civil engineering foundation and the steel structure.

[0007] The hinge support includes a shaft, end covers are installed at both ends of the shaft, an upper support is provided on the upper part of the shaft, a lower support is provided on the lower part of the shaft, the upper support is rigidly connected to the flange, and the lower support is rigidly connected to the swing end beam. The gantry and the swing end beam are connected by the hinge support, so that the force can be reliably transmitted between the gantry and the swing end beam.

[0008] The shaft is arranged parallel to the length direction of the swing end beam.

[0009] The retaining wheels are arranged closely against both sides of the track, so that the center line of the wheels coincides with the center line of the track during operation, ensuring that the fixed end beam and the swing end beam always move along the straight direction of the track center line during walking, and the wheels will not gnaw the track.

[0010] A chute is provided inside the flange, which can compensate for the span deformation occurring after the gantry hoists the material taking arm during equipment installation.

[0011] The gantry is made of a large-section box girder, so that the gantry has enough elasticity to drag the two side end beams during movement.

[0012] The gantry drags the fixed end beam and the swing end beam to move forward or backward along the track center line through the hinge support.

[0013] The gantry is connected to the fixed end beam through the flange, and there is no relative degree of freedom between the gantry and the fixed end beam.

[0014] The fixed end beam is located on the ground track, and the swing end beam is located on the track at a high position of the retaining wall.

[0015] Advantageous effects: The present invention has the following advantages:

[0016] 1. The present invention is provided with a hinge support and a flange between the gantry and the swing end beam, which can not only compensate for the continuously changing small deflection angles of the swing end beam side at different positions during the process of the gantry hoisting the material taking arm, but also compensate for the differences in the civil engineering span and the equipment span occurring under different temperature environments due to different thermal expansion coefficients of the civil engineering foundation and the steel structure; a chute is provided inside the flange, which can compensate for the span deformation occurring after the gantry hoists the material taking arm during equipment installation;

[0017] 2. Several pairs of horizontally arranged retaining wheels are respectively provided at the front and rear ends of the fixed end beam and the swing end beam. After the equipment is installed and adjusted, ensure that the retaining wheels are closely against both sides of the track, so that the center line of the wheels coincides with the center line of the track during operation;

[0018] 3. The gantry of the present invention is made of a large-section box girder with good rigidity, so that the gantry has enough elasticity to drag the two side end beams during movement. Description of the drawings

[0019] Figure 1 is the front view of the present invention;

[0020] Figure 2 is the top view of the present invention;

[0021] Figure 3 is the side view of the present invention;

[0022] Figure 4 is Figure 1 the view from direction B of

[0023] Figure 5 is Figure 4 the side view of

[0024] Figure 6 is Figure 1 the sectional view taken along line A-A of Detailed implementation manners

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As Figures 1 to 6 shown, the synchronization structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard of this embodiment includes a fixed end beam 1, a swing end beam 2 and a gantry 3. The fixed end beam 1 is located on the ground track, and the swing end beam 2 is located on the high-wall track. One end of the gantry 3 is rigidly connected to the fixed end beam 1 through a flange. The gantry 3 and the fixed end beam 1 are integrated as a whole without relative degrees of freedom. The other end of the gantry 3 is connected to the swing end beam 2. A flange 5 is provided at one end of the gantry 3 close to the swing end beam 2, and a hinge support 4 is installed on the corresponding side of the swing end beam 2. The top of the hinge support 4 is connected to the flange 5. The gantry 3 can drag the fixed end beam 1 and the swing end beam 2 to move forward or backward along the track center line through the hinge support 4.

[0027] As Figure 4 shown, the hinge support 4 includes a shaft 44. The shaft 44 is arranged parallel to the length direction of the swing end beam 2. End caps 43 are installed at both ends of the shaft 44. An upper support 41 is provided on the upper part of the shaft 44, and a lower support 42 is provided on the lower part of the shaft 44. The upper support 41 is rigidly connected to the flange 5 through bolts, and the lower support 42 is rigidly connected to the swing end beam 2. By connecting the gantry 3 and the swing end beam 2 through the hinge support 4, reliable force transmission can be carried out between the gantry 3 and the swing end beam 2. The hinge support 4 enables the swing end beam 2 to have a relative rotation degree of freedom with respect to the gantry 3, and the relative rotation axis direction is parallel to the length direction of the swing end beam 2. It can not only compensate for the continuously changing small deflection angles on the side of the swing end beam 2 at different positions during the process of the gantry 3 lifting the reclaiming arm 7, but also compensate for the differences in the civil engineering span and the equipment span caused by different thermal expansion coefficients of the civil engineering foundation and the steel structure in different temperature environments.

[0028] As Figure 2As shown in the figure, several pairs of horizontally arranged retaining wheels 6 are respectively provided at the front and rear ends of the fixed-end beam 1 and the swing-end beam 2. After the equipment is installed and adjusted, ensure that the retaining wheels 6 are closely attached to both sides of the track, so that the center line of the wheels coincides with the center line of the track during operation, ensuring that the fixed-end beam 1 and the swing-end beam 2 always travel along the straight direction of the track center line during walking, and the wheels will not gnaw the track. The whole set of walking transmission components of the fixed-end beam 1 and the swing-end beam 2 are the same, and the frequency of variable-frequency speed regulation during walking is also the same, so theoretically the walking speeds are the same.

[0029] As Figure 5 shown in the figure, a chute 51 is provided inside the flange 5, which can compensate for the span deformation amount that occurs after the gantry 3 hoists the material fetching arm 7 during equipment installation.

[0030] As Figure 6 shown in the figure, the gantry 3 of the present invention selects a large-section box girder with good rigidity, so that the gantry 3 has enough elasticity to drag the two side beams during travel.

[0031] During operation, the trolley of the semi-gantry type material fetching machine travels along the track laid in the length direction of the storage yard. The scraper system is driven by a motor to drive a reducer to drive a sprocket and drive a scraper chain to scrape materials; the walking end beam supports the weight of the whole machine and realizes shunting and working operation. When fetching materials, the material fetching arm 7 floats on the material pile, and the suspension angle of the boom is changed according to the predetermined material intake depth to achieve the predetermined material fetching amount. The automatic deviation correction process of the equipment is as follows:

[0032] During normal operation, the fixed-end beam 1 and the swing-end beam 2 theoretically move forward or backward along the track center line at the given same speed. Since the fixed-end beam 1 and the swing-end beam 2 each have several pairs of retaining wheels 6 closely attached to the track, the fixed-end beam 1 and the swing-end beam 2 are equivalent to the track not being skewed during walking. However, due to manufacturing and installation errors, as well as actual friction, resistance, motor and frequency converter errors, etc., the swing-end beam 2 and the fixed-end beam 1 will be out of sync during walking. Since the gantry 3 of the large-span semi-gantry type material fetching machine has a large bending cross-section and high stiffness, once the swing-end beam 2 and the fixed-end beam 1 are out of sync during walking, the gantry 3 will generate an elastic dragging force on the faster-moving end beam to slow it down, and at the same time generate a dragging force on the slower-moving end beam to speed it up, always keeping the walking speeds of the fixed-end beam 1 and the swing-end beam 2 in a dynamically same state. The semi-gantry type scraper material fetching machine with the above structure does not rely on a deviation correction device and an electric control feedback device, and can complete automatic deviation correction only by its own structure, and ensure the normal operation of the equipment, with high reliability, and basically eliminate the later-stage faults and maintenance workloads existing in the traditional structure.

Claims

1. A synchronous structure applicable to a large-span semi-gantry scraper reclaimer in a stockyard, characterized in that, It includes a fixed-end beam, a swing-end beam and a gantry. One end of the gantry is rigidly connected to the fixed-end beam, and the other end of the gantry is connected to the swing-end beam. A flange is provided at one end of the gantry close to the swing-end beam, and a hinge support is installed on the corresponding side of the swing-end beam. The top of the hinge support is connected to the flange; several pairs of horizontally arranged retaining wheels are respectively provided at the front and rear ends of the fixed-end beam and the swing-end beam.

2. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1, characterized in that, The hinge support enables the swing-end beam to have a degree of freedom of relative rotation with respect to the gantry, and the direction of the relative rotation axis is parallel to the length direction of the swing-end beam.

3. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1 or 2, characterized in that, The hinge support includes a shaft. End covers are installed at both ends of the shaft. An upper support is provided on the upper part of the shaft, and a lower support is provided on the lower part of the shaft. The upper support is rigidly connected to the flange, and the lower support is rigidly connected to the swing-end beam.

4. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 3, characterized in that The shaft is arranged parallel to the length direction of the swing-end beam.

5. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1, characterized in that, The retaining wheels are arranged closely along both sides of the track.

6. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1, characterized in that, A chute is provided inside the flange.

7. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1, characterized in that, The gantry is selected as a large-section box girder.

8. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1 or 7, characterized in that, The gantry drags the fixed-end beam and the swing-end beam to move forward or backward along the track center line through the hinge support.

9. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 8, characterized in that, The gantry is connected to the fixed-end beam through the flange, and there is no relative degree of freedom between the gantry and the fixed-end beam.

10. The synchronous structure applicable to the large-span semi-gantry scraper reclaimer in the stockyard according to claim 1, characterized in that, The fixed-end beam is located on the ground track, and the swing-end beam is located on the track at a high position of the retaining wall.

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