A vibrating impact hammer device

Abstract

The present invention relates to a vibration impact hammer device, which comprises an impact hammer housing, an upper end cover, a lower end cover, an impact hammer, an upper air inlet, a lower air inlet, a reversing slider, a slider upwardly moving push rod, a slider downwardly moving push rod, an air outlet on the outer wall of the housing, an air outlet connecting hole on the slider, an air outlet on the inner wall of the housing, an air outlet on the outer wall of the housing, an air outlet on the lower wall of the housing, an air outlet connecting hole on the slider, and an air outlet on the inner wall of the housing. In use, when the impact hammer moves upward or downward, the slider upwardly moving push rod or the slider downwardly moving push rod fixed on the impact hammer hits the upper reversing block or the lower reversing block of the reversing slider, so as to realize the alternating air intake of the lower air inlet or the upper air inlet, and drive the impact hammer to reciprocate up and down. The device can be used to hammer the continuous casting billet that is not completely solidified, and plays the role of breaking the dendrites at the solidification front of the casting billet and refining the solidification structure in the center of the casting billet. Compared with the prior art, it has the advantages of simple equipment, large impact energy, and accurate impact.

Description

Technical Field

[0001] The invention belongs to the field of metal solidification and continuous casting, and in particular relates to a vibration impact hammer device. Background Art

[0002] With the development of world metallurgical technology, modern continuous casting technology has been continuously improving, and the types of castable steel have been continuously expanding. Some high-alloy and high-quality special steels have been continuously produced in the continuous casting production process of large steel enterprises. In order to solve the above problems, metallurgical scientists have developed many patents and technologies in this technology for a long time. At present, the main technologies used in industrial production on a large scale are electromagnetic stirring technology and soft reduction at the end of solidification or casting and rolling technology.

[0003] The application of electromagnetic stirrer is an effective method to improve the equiaxed crystal rate and internal quality of the ingot. However, it also has certain disadvantages in use. First, electromagnetic stirring can easily cause the ingot to produce "white bright band" or negative segregation band, which affects the uniformity of the ingot performance; second, the electromagnetic stirrer has a large energy loss after penetrating the metal shell, and as the shell of the continuous casting ingot becomes thicker, the energy lost by the electromagnetic field penetrating the metal shell is also greater. Therefore, the effect of the electromagnetic stirrer on the end position of the ingot solidification is not as obvious as placing it at the crystallizer position.

[0004] Therefore, the light pressing technology at the end of solidification was developed, which uses mechanical deformation to compact the core of the incompletely solidified ingot to improve the core segregation of the ingot. However, since the pressing force at the end of solidification of the ingot is very large, it often causes the occurrence of pressing cracks.

[0005] In recent years, some new methods for effectively improving defects such as segregation, porosity and shrinkage in the center of the ingot have emerged. The applicant's prior application - Chinese Patent Application No.: 201921653581.3 discloses "a continuous casting rotating support roller with a vibrating member", which provides a method of applying vibration force to the solidified ingot shell by vibration. On the one hand, its purpose is to promote the breaking of dendrites at the solidification front of the ingot shell and increase the central equiaxed crystal rate of the ingot; on the other hand, it is to improve defects such as segregation, porosity and shrinkage in the center of the ingot at the end of solidification. However, in order to ensure the reciprocating vibration and sufficient kinetic energy of the vibrator, the above patent requires two air inlets to alternately inlet, that is, a gas reversing valve needs to be set at the air inlet, so the result is more complicated. When the above patent uses one air inlet, although vibration can be generated, due to the short air intake time, the reverse air intake at the end of the movement of the vibrator will also generate movement resistance to the vibrator, so the final useful impact kinetic energy of the vibrator will be greatly reduced, reducing the impact effect on the ingot. Summary of the invention

[0006] In order to overcome the above-mentioned technical defects, the present invention proposes a vibration impact hammer device, which integrates the impact hammer and the gas reversing valve into one, can realize air intake through a single air inlet hole, and overcomes the disadvantage of reduced impact kinetic energy of the vibrating part at the end of its movement without adopting the reversing operation of the reversing valve.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A vibration impact hammer device, characterized in that it comprises an impact hammer housing 1, an upper end cover 2, a lower end cover 3, an impact hammer 4 and a reversing slider 7;

[0009] The impact hammer 4 is driven by a power source medium to move up and down in an airtight chamber. The impact hammer 4 includes a hammering part and a sliding part. The sliding part divides the airtight chamber into an upper chamber and a lower chamber. The upper chamber and the lower chamber are respectively provided with an upper air inlet hole 5 and a lower air inlet hole 6.

[0010] The reversing slider 7 is in a "U" shape, including a sliding block that can move up and down, and an upper reversing block and a lower reversing block respectively fixed to the top and bottom ends of the sliding block; one side wall of the impact hammer housing 1 is a double-layer structure, and there is a cavity between the inner side wall and the outer side wall for accommodating the reversing sliding block 7 to move up and down; the inner side wall and the outer side wall are respectively provided with upper and lower air outlet holes relative to each other, and the air outlet holes of the relative inner and outer walls are controlled to be opened or closed by the sliding block;

[0011] The upper end surface and the lower end surface of the sliding part of the impact hammer 4 are respectively provided with a slider upward moving ejector pin 8 and a slider downward moving ejector pin 9, which act on the upper reversing block and the lower reversing block of the reversing slider 7 respectively, and realize the up and down reciprocating motion of the impact hammer 4 through the alternating air intake and exhaust of the upper cavity and the lower cavity.

[0012] The upper end cover 2 and the lower end cover 3 are respectively fixed to the upper end and the lower end of the impact hammer housing 1, so that the airtight chamber is formed in the impact hammer housing 1; the sliding part of the impact hammer 4 is in sliding contact with the left and right inner walls of the impact hammer housing 1.

[0013] The following cavity is provided between the inner side wall and the outer side wall of the impact hammer housing 1; there is a gap between the top end surface of the inner side wall and the upper end cover 2, the plane where the inner side surface of the inner side wall is located is spaced a certain distance from the plane where the side end surface of the top wall of the impact hammer housing 1 and the side end surface of the bottom wall of the impact hammer housing 1 are located, and the top end surface of the inner side wall is in the same plane as the lower end surface of the top wall of the impact hammer housing 1; there is a gap between the bottom end surface of the inner side wall and the lower end cover 3, and the bottom end surface of the inner side wall is in the same plane as the upper end surface of the bottom wall of the impact hammer housing 1.

[0014] The sliding block of the reversing slider 7 can slide up and down in the gap between the inner wall and the outer wall; the upper reversing block is located in the gap between the top end of the inner wall and the upper end cover 2, and the end of the upper reversing block contacts the side end surface of the top wall of the impact hammer housing 1; the lower reversing block is located in the gap between the bottom end of the inner wall and the lower end cover 3, and the end of the lower reversing block contacts the side end surface of the bottom wall of the impact hammer housing 1.

[0015] The upper cavity and the lower cavity corresponding to the outer wall are respectively provided with the first shell outer wall upper air outlet hole 10 and the first shell outer wall lower air outlet hole 13, and the upper cavity and the lower cavity corresponding to the inner wall are respectively provided with the shell inner wall upper air outlet hole 12 corresponding to the first shell outer wall upper air outlet hole 10 and the shell inner wall lower air outlet hole 15 corresponding to the first shell outer wall lower air outlet hole 13; the sliding block of the reversing slider 7 is respectively provided with the slider upper air outlet hole 11 and the slider lower air outlet hole 14 corresponding to the upper cavity and the lower cavity; with the reversing slider 7 reciprocating up and down motion, the slider upper air outlet hole 11 and the slider lower air outlet hole 14 respectively alternately connect the first shell outer wall upper air outlet hole 10 with the shell inner wall upper air outlet hole 12 and the first shell outer wall lower air outlet hole 13 with the shell inner wall lower air outlet hole 15, so as to realize the alternating air intake and exhaust of the upper and lower cavities.

[0016] The length of the side end surface of the top wall of the impact hammer housing 1 is more than twice the length of the end of the upper reversing block of the reversing slider 7 in contact with it, and the length of the side end surface of the bottom wall of the impact hammer housing 1 is more than twice the length of the end of the lower reversing block of the reversing slider 7 in contact with it.

[0017] The upper air inlet hole 5 is arranged at the lower part of the side end surface of the top wall of the impact hammer housing 1, and the lower air inlet hole 6 is arranged at the upper part of the side end surface of the bottom wall of the impact hammer housing 1; the upper air inlet hole 5 and the lower air inlet hole 6 are connected and are always supplied with power source medium. As the reversing slider 7 reciprocates up and down, the upper reversing block and the lower reversing block respectively alternately block the upper air inlet hole 5 and the lower air inlet hole 6.

[0018] The upper air inlet 5 is arranged at the lower end surface of the top wall of the impact hammer housing 1, and the lower air inlet 6 is arranged at the upper end surface of the bottom wall of the impact hammer housing 1; the upper air inlet 5 and the lower air inlet 6 are alternately fed with air.

[0019] The front end face of the outer wall of the impact hammer housing 1 is provided with an air inlet 22 on the outer wall of the housing and an air inlet 23 on the lower wall of the housing, and the rear end face of the outer wall of the impact hammer housing 1 is provided with an air outlet 24 on the second outer wall of the housing and an air outlet 25 on the lower wall of the second outer wall of the housing; the reversing slider 7 is provided with an air inlet connection hole 26, and the air inlet 22 on the outer wall of the housing, the air inlet 23 on the lower wall of the housing, the air outlet 24 on the second outer wall of the housing, the air outlet 25 on the lower wall of the second outer wall of the housing and the air inlet connection hole 26 are located in the same vertical plane; ... second housing The air outlet 24 and the lower air outlet 25 on the outer wall of the second shell are connected with the upper air inlet 5 and the lower air inlet 6 respectively through the upper air inlet connecting pipe 27 and the lower air inlet connecting pipe 28; the upper air inlet 22 on the outer wall of the shell and the lower air inlet 23 on the outer wall of the shell are always supplied with power source medium. As the reversing slider 7 moves up and down, the air inlet connecting hole 26 alternately connects the upper air inlet 22 on the outer wall of the shell with the upper air outlet 24 on the outer wall of the second shell, and the lower air inlet 23 on the outer wall of the shell with the lower air outlet 25 on the outer wall of the second shell, so as to realize alternating air intake of the upper air inlet 5 and the lower air inlet 6.

[0020] The air outlet hole 10 on the first shell outer wall, the air outlet hole 13 on the first shell outer wall, the air inlet hole 22 on the shell outer wall and the air inlet hole 23 on the shell outer wall are all connected to the gas circulation device to realize intermittent circulation air intake in the upper and lower chambers of the airtight chamber.

[0021] A sealing ring or sealing strip is provided between the upper end cover 2 and the impact hammer housing 1 , and between the lower end cover 3 and the impact hammer housing 1 .

[0022] A sealing ring 16 is provided on the contact surface of the sliding portion of the impact hammer 4 that contacts the left and right inner walls of the impact hammer housing 1 .

[0023] The upper end cover 2 and the top wall of the impact hammer housing 1 are provided with openings, and the hammering part of the impact hammer 4 is partially exposed from the upper end cover 2 .

[0024] A sealing ring 16 is provided on the contact surface of the hammer housing 1 and / or the upper end cover 2 that contacts the hammer part of the hammer 4 .

[0025] The sealing ring 16 is made of one of metal, ceramic, plastic, rubber, graphite, or a composite material of the above.

[0026] The cross section of the hammering part of the impact hammer 4 is one of circular, square, and strip shapes or a combination of the above shapes.

[0027] The cross-sectional area of ​​the hammering part of the impact hammer 4 is smaller than the cross-sectional area of ​​the sliding part, and the cross-sectional area of ​​the sliding part is 105% to 500% of the cross-sectional area of ​​the hammering part.

[0028] The vibration impact hammer device is placed around the ingot 17, on two opposite sides, and on one side to strike the shell of the ingot with the liquid core.

[0029] On one side of the ingot 17, a plurality of vibration impact hammer devices are placed.

[0030] The vibrating hammer device strikes the central area of ​​the side surface of the casting strand 17 .

[0031] The vibration impact hammer device is placed at the crystallizer outlet, and / or the secondary cooling zone, and / or the solidification end; one or more groups are placed at each position.

[0032] The power source medium is gas or liquid; the pressure of the power source medium is 0.2-15 MPa.

[0033] The frequency of the reciprocating vibration of the impact hammer 4 is 0.2-150 Hz, and the vibration amplitude or stroke S of the impact hammer 4 is 10-900 mm.

[0034] An oil filling hole 18 is provided on the impact hammer housing 1 .

[0035] A water cooling channel 19 is disposed outside the impact hammer housing 1 .

[0036] The hammering part of the impact hammer 4 is provided with a protective cover 20 , and is fixed to the hammering part of the impact hammer 4 by bolts or pins 21 .

[0037] The shape of the contact surface between the protective cover 20 and the casting slab 17 is the same as the shape of the struck casting slab 17, or the shape of the contact surface between the protective cover 20 and the casting slab 17 is flat, concave arc-shaped or convex arc-shaped.

[0038] The vibration impact hammer device is suitable for square billets, rectangular billets, plate billets or round billets.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention integrates the vibration impact hammer and the gas reversing valve, so that the impact hammer 4 can maintain a continuous inflated and pressurized state in the entire stroke S interval during the upward or downward movement, which can ensure that the speed and impact energy of the impact hammer 4 gradually increase with the increase of the moving distance; and regardless of the changes in gas pressure and vibration frequency, it can ensure that the impact hammer 4 hits in place and has sufficient energy to hammer the ingot with liquid core to break the coarse central equiaxed crystals, refine the solidification structure, and improve the quality of the ingot core. Compared with the existing technology, it has the advantages of simple equipment, large impact energy, and accurate impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of Embodiment 1 of the vibration impact hammer device of the present invention (using an internal gas channel);

[0042] Figure 2It is a schematic diagram of the structure in which a sealing ring is provided on the impact hammer housing 1 and / or the upper end cover 2 and the impact hammer 4;

[0043] Figure 3a to Figure 3c is the cross-sectional shape of the hammering portion of the impact hammer 4;

[0044] Figure 4 It is a schematic diagram of the structure in which the hammering part of the hammer 4 is completely not exposed from the hammer housing 1;

[0045] Figure 5a to Figure 5b This is Example 2 of the present invention (using an external gas channel), Figure 5a is a schematic diagram of the outer contour of this embodiment; Figure 5b for Figure 5a Schematic diagram of the cross-sectional structure along the aa direction;

[0046] Figure 6a to Figure 6c It is a layout diagram of the vibration impact hammer device on any cross section of the casting billet 17;

[0047] Figure 7 A schematic diagram of placing multiple vibration impact hammer devices on one side of the ingot;

[0048] Figure 8 A schematic structural diagram of a replaceable protective cover 20 provided for the hammering part of the impact hammer.

[0049] The accompanying drawings are denoted as follows:

[0050] 1 Hammer housing

[0051] 2 Upper cover

[0052] 3 Lower end cover

[0053] 4 Impact hammer

[0054] 5 Upper air intake

[0055] 6 Lower air intake

[0056] 7 Reversing slide

[0057] 8 The slider moves the ejector upwards

[0058] 9 The slider moves the ejector pin downwards

[0059] 10 Air outlet hole on the outer wall of the first shell

[0060] 11 Air vent on the slider

[0061] 12 Air vent on the inner wall of the shell

[0062] 13 Air outlet hole at the bottom of the outer wall of the first shell

[0063] 14 Air vent under the slider

[0064] 15 Air outlet hole on the inner wall of the shell

[0065] 16 Sealing ring

[0066] 17 Casting

[0067] 18 Oil filling hole

[0068] 19 Water cooling channels

[0069] 20 Protective cover

[0070] 21 Bolts or pins

[0071] 22 Air inlet hole on the outer wall of the shell

[0072] 23 Air inlet hole on the outer wall of the shell

[0073] 24 Air outlet hole on the outer wall of the second shell

[0074] 25 Air outlet hole at the lower outer wall of the second shell

[0075] 26 Air intake connection hole

[0076] 27 Upper air intake connection pipe

[0077] 28 Lower air intake connection pipe

[0078] S Vibration amplitude or stroke of the impact hammer 4 DETAILED DESCRIPTION

[0079] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0080] Example 1 - Using internal gas communication channels

[0081] like Figure 1 As shown, a vibration impact hammer device of the present invention includes: an impact hammer housing 1, an upper end cover 2, a lower end cover 3, an impact hammer 4 and a reversing slider 7.

[0082] The upper end cover 2 and the lower end cover 3 are respectively fixed to the upper end and the lower end of the impact hammer housing 1, so that an airtight chamber is formed in the impact hammer housing 1; the impact hammer 4 is located in the chamber, and the impact hammer 4 includes a hammering part and a sliding part that is in sliding contact with the left and right inner walls of the impact hammer housing 1. The impact hammer 4 divides the chamber into an upper chamber and a lower chamber.

[0083] The side wall on the left or right side of the impact hammer housing 1 is a double-layer structure, including an inner wall and an outer wall, and there is a gap between the inner wall and the outer wall; there is a gap between the top end surface of the inner wall and the upper end cover 2, the plane where the inner side surface of the inner wall is located is spaced a certain distance from the plane where the side end surface of the top wall of the impact hammer housing 1 and the side end surface of the bottom wall of the impact hammer housing 1 are located, and the top end surface of the inner wall is in the same plane as the lower end surface of the top wall of the impact hammer housing 1; there is a gap between the bottom end surface of the inner wall and the lower end cover 3, and the bottom end surface of the inner wall is in the same plane as the upper end surface of the bottom wall of the impact hammer housing 1.

[0084] The reversing slider 7 is in a "U" shape, including a sliding block, and an upper reversing block and a lower reversing block respectively fixed to the top and bottom ends of the sliding block; wherein the sliding block can slide up and down in the gap between the inner wall and the outer wall; the upper reversing block is located in the gap between the top end of the inner wall and the upper end cover 2, and the end of the upper reversing block contacts the side end surface of the top wall of the impact hammer housing 1; the lower reversing block is located in the gap between the bottom end of the inner wall and the lower end cover 3, and the end of the lower reversing block contacts the side end surface of the bottom wall of the impact hammer housing 1.

[0085] An upper air inlet 5 is provided at the lower portion of the side end surface of the top wall of the impact hammer housing 1 , and a lower air inlet 6 is provided at the upper portion of the side end surface of the bottom wall of the impact hammer housing 1 .

[0086] The upper end surface and the lower end surface of the sliding part of the impact hammer 4 are respectively provided with a slider upward moving ejector pin 8 and a slider downward moving ejector pin 9; the slider upward moving ejector pin 8 and the slider downward moving ejector pin 9 are located between the plane where the inner side surface of the inner side wall is located and the side end surface of the top wall of the impact hammer housing 1 and the plane where the side end surface of the bottom wall of the impact hammer housing 1 is located.

[0087] The upper and lower parts of the outer wall are respectively provided with an upper air outlet hole 10 on the outer wall of the first shell and a lower air outlet hole 13 on the outer wall of the first shell; the upper and lower parts of the inner wall are respectively provided with an upper air outlet hole 12 on the inner wall of the shell corresponding to the upper air outlet hole 10 on the outer wall of the first shell and a lower air outlet hole 15 on the inner wall of the shell corresponding to the lower air outlet hole 13 on the outer wall of the first shell; the upper and lower parts of the sliding block of the reversing slider 7 are respectively provided with an upper air outlet hole 11 on the slider and a lower air outlet hole 14 on the slider.

[0088] The upper end cover 2, the lower end cover 3 and the impact hammer housing 1 are fixedly connected by bolts and screws; in order to prevent air leakage, sealing rings, sealing strips, etc. can be arranged between the upper end cover 2, the lower end cover 3 and the impact hammer housing 1.

[0089] In use, the upper air inlet 5 and the lower air inlet 6 are connected and always maintain the air intake state. When the impact hammer 4 moves upward, at this time, the upper reversing block of the reversing slider 7 blocks the upper air inlet 5, and the lower air inlet 6 takes in air. The upper air outlet 11 of the reversing slider 7 connects the air outlet 10 on the outer wall of the first shell with the air outlet 12 on the inner wall of the shell, so that the upper chamber of the vibration impact hammer device can be discharged. Under the action of inertial force, the slider moves upward to hit the upper reversing block of the reversing slider 7, and the reversing slider 7 moves upward to achieve gas reversal. The upper air inlet 5 starts to take in air. At the same time, the lower reversing block of the reversing slider 7 blocks the air intake channel of the lower air inlet 6. The lower air outlet 14 of the slider connects the lower air outlet 13 on the outer wall of the first shell with the lower air outlet 15 on the inner wall of the shell, so that the lower chamber of the vibration impact hammer device can be discharged. The impact hammer 4 is forced to start moving downward. Similarly, when the slider moves downward and the push rod 9 hits the lower reversing block of the gas reversing slider 7, the reversing slider 7 moves downward to realize gas reversal, and the lower air inlet 6 starts to take in air. At the same time, the upper reversing block of the reversing slider 7 blocks the air inlet passage of the upper air inlet 5, and the impact hammer 4 starts to move upward under the force. In this cycle, the impact hammer 4 realizes the up and down reciprocating motion.

[0090] In order to ensure the sealing effect of the vibration impact hammer device of the present invention, a sealing ring 16 can be provided on the impact hammer housing 1 and / or the upper end cover 2 and the impact hammer 4. Figure 2 The sealing ring 16 may be made of metal, ceramic, plastic, rubber, graphite, a composite of the above materials, and other materials not limited thereto.

[0091] The cross section of the hammering part of the impact hammer 4 of the vibration impact hammer device can be circular, square, or long. Figure 3a , Figure 3b and Figure 3c ; or other combined shapes.

[0092] The cross-sectional area of ​​the hammering part of the impact hammer 4 of the vibration impact hammer device can be smaller than the cross-sectional area of ​​the sliding part. Figure 1 , the cross-sectional area of ​​the sliding part is 105% to 500% of the area of ​​the hammering part. When the cross-sectional area of ​​the hammering part of the impact hammer 4 is converted into a circular area, its equivalent diameter is about 20 to 150 mm. Increasing the cross-sectional area of ​​the sliding part of the impact hammer 4 can increase its upward movement speed and impact kinetic energy; increasing the area difference between the cross-sectional area of ​​the sliding part and the cross-sectional area of ​​the hammering part can increase the return speed of the impact hammer 4 and increase the movement frequency of the impact hammer.

[0093] The upper end cover 2 and the top wall of the impact hammer housing 1 of the vibration impact hammer device may be perforated, and the hammering part of the impact hammer 4 is partially exposed from the upper end cover 2 for striking the casting slab 17. Figure 1In addition, the upper end cover 2 of the vibration impact hammer device can also be sealed, and the impact hammer 4 is completely not exposed from the impact hammer housing 1. At this time, the equipment can be used to generate vibrations with strong impact force, see Figure 4 .

[0094] Example 2 - Using external gas communication channel

[0095] Figure 5a and Figure 5b As shown, the air inlet of the vibration impact hammer device can also be designed in the following manner: the upper air inlet 5 is arranged on the lower end surface of the top wall of the impact hammer housing 1, and the lower air inlet 6 is arranged on the upper end surface of the bottom wall of the impact hammer housing 1. The front end surface of the outer wall of the impact hammer housing 1 is provided with an upper air inlet 22 on the outer wall of the housing and a lower air inlet 23 on the outer wall of the housing, and the rear end surface of the outer wall of the impact hammer housing 1 is provided with an upper air outlet 24 on the second outer wall of the housing and a lower air outlet 25 on the second outer wall of the housing; the reversing slider 7 is provided with an air inlet connection hole 26, and the upper air inlet 22 on the outer wall of the housing, the lower air inlet 23 on the outer wall of the housing, the upper air outlet 24 on the second outer wall of the housing, the lower air outlet 25 on the second outer wall of the housing and the air inlet connection hole 26 are located in the same vertical plane; ... The air outlet 24 and the lower air outlet 25 on the outer wall of the second shell are connected to the upper air inlet 5 and the lower air inlet 6 through the upper air inlet connecting pipe 27 and the lower air inlet connecting pipe 28 respectively; the upper air inlet 22 on the outer wall of the shell and the lower air inlet 23 on the outer wall of the shell are always supplied with the power source medium. As the reversing slider 7 moves up and down, the air inlet connecting hole 26 alternately connects the upper air inlet 22 on the outer wall of the shell with the upper air outlet 24 on the outer wall of the second shell, and the lower air inlet 23 on the outer wall of the shell with the lower air outlet 25 on the outer wall of the second shell, so as to realize the alternating air intake of the upper air inlet 5 and the lower air inlet 6. The upper air outlet 10 on the outer wall of the first shell, the lower air outlet 13 on the outer wall of the first shell, the upper air inlet 22 on the outer wall of the shell, and the lower air inlet 23 on the outer wall of the shell are all connected to the gas circulation device to realize the intermittent circulation air intake of the upper and lower chambers of the airtight chamber. The vibration impact hammer device is installed in the continuous casting machine and is used to hammer the ingot 17. It can be placed around the ingot 17, on both sides of the opposite sides, on one side, etc. to knock the shell of the ingot with the liquid core. Figure 6a , Figure 6b and Figure 6c .

[0096] One or more vibration hammer devices may be placed on one side of the ingot 17 to strike the shell of the ingot with the liquid core, such as Figure 7 shown.

[0097] The vibration impact hammer device can strike the central area of ​​the side surface of the casting billet 17 , or can strike other positions of the casting billet 17 .

[0098] The vibration impact hammer device can be placed at multiple positions of the casting machine, such as the crystallizer outlet, the secondary cooling zone, the solidification end, etc.; at each position, one or more groups of the vibration impact hammer devices can be placed.

[0099] The power source medium driving the vibration impact hammer device to vibrate can be gas or liquid; the pressure of the power source medium is 0.2-15MPa.

[0100] The reciprocating vibration frequency of the impact hammer 4 of the vibration impact hammer device is 0.2-150 Hz, and the vibration amplitude S of the impact hammer 4 is 10-900 mm.

[0101] In order to increase the service life of the vibration impact hammer device, an oil filling hole 18 can be opened on the impact hammer housing 1 to ensure lubrication.

[0102] Similarly, in order to increase the service life of the vibration impact hammer device, a water cooling channel 19 can be provided outside the impact hammer housing 1. Figure 2 .

[0103] At the same time, in order to prevent the impact head of the vibration impact hammer device from being deformed and to increase the service life, a replaceable protective cover 20 can be provided on the hammering part of the impact hammer 4 and fixed to the hammering part of the impact hammer 4 by bolts or pins 21. Figure 8 The shape of the contact surface between the protective cover 20 and the casting slab 17 can be the same as the shape of the casting slab being struck, or can be flat, concave arc-shaped, or convex arc-shaped.

[0104] The vibration impact hammer device is suitable for square billets, rectangular billets, slabs, round billets and other shapes of casting billets.

Claims

1. A vibration impact hammer device, characterized in that: It comprises an impact hammer housing (1), an upper end cover (2), a lower end cover (3), an impact hammer (4) and a reversing slider (7); The impact hammer (4) is driven by a power source medium to move up and down in an airtight chamber. The impact hammer (4) comprises a hammering part and a sliding part. The sliding part divides the airtight chamber into an upper chamber and a lower chamber. The upper chamber and the lower chamber are respectively provided with an upper air inlet hole (5) and a lower air inlet hole (6). The reversing slider (7) is in a "U" shape, comprising a sliding block that can move up and down, and an upper reversing block and a lower reversing block respectively fixed to the top and bottom ends of the sliding block; one side wall of the impact hammer housing (1) is a double-layer structure, and a cavity is provided between the inner side wall and the outer side wall for accommodating the reversing slider (7) to move up and down; the inner side wall and the outer side wall are respectively provided with upper and lower air outlet holes opposite to each other, and the air outlet holes on the opposite inner and outer walls are controlled to be opened or closed by the sliding block; The upper end surface and the lower end surface of the sliding part of the impact hammer (4) are respectively provided with a slider upward moving ejector pin (8) and a slider downward moving ejector pin (9), which act on the upper reversing block and the lower reversing block of the reversing slider (7) respectively, and the up and down reciprocating motion of the impact hammer (4) is realized by alternately inletting and exhausting air in the upper cavity and the lower cavity.

2. The vibration impact hammer device according to claim 1, characterized in that: The upper end cover (2) and the lower end cover (3) are respectively fixed to the upper end and the lower end of the impact hammer housing (1), so that the airtight chamber is formed in the impact hammer housing (1); the sliding part of the impact hammer (4) is in sliding contact with the left and right inner walls of the impact hammer housing (1).

3. The vibration impact hammer device according to claim 1, characterized in that: The hammer housing (1) has a cavity between its inner wall and outer wall; a gap is provided between the top end surface of the inner wall and the upper end cover (2); the plane where the inner side surface of the inner wall is located is spaced a certain distance from the plane where the side end surface of the top wall of the hammer housing (1) and the side end surface of the bottom wall of the hammer housing (1) are located, and the top end surface of the inner wall is coplanar with the lower end surface of the top wall of the hammer housing (1); a gap is provided between the bottom end surface of the inner wall and the lower end cover (3), and the bottom end surface of the inner wall is coplanar with the upper end surface of the bottom wall of the hammer housing (1).

4. The vibration impact hammer device according to claim 1, characterized in that: The sliding block of the reversing slider (7) can slide up and down in the gap between the inner wall and the outer wall; the upper reversing block is located in the gap between the top end of the inner wall and the upper end cover (2), and the end of the upper reversing block contacts the side end surface of the top wall of the impact hammer housing (1); the lower reversing block is located in the gap between the bottom end of the inner wall and the lower end cover (3), and the end of the lower reversing block contacts the side end surface of the bottom wall of the impact hammer housing (1).

5. The vibration impact hammer device according to claim 1, characterized in that: The upper cavity and the lower cavity corresponding to the outer wall are respectively provided with a first shell outer wall upper air outlet hole (10) and a first shell outer wall lower air outlet hole (13); the upper cavity and the lower cavity corresponding to the inner wall are respectively provided with a shell inner wall upper air outlet hole (12) corresponding to the first shell outer wall upper air outlet hole (10) and a shell inner wall lower air outlet hole (15) corresponding to the first shell outer wall lower air outlet hole (13); the sliding block of the reversing slider (7) is respectively provided with a slider upper air outlet hole (11) and a slider lower air outlet hole (14) corresponding to the upper cavity and the lower cavity; as the reversing slider (7) reciprocates up and down, the slider upper air outlet hole (11) and the slider lower air outlet hole (14) respectively alternately connect the first shell outer wall upper air outlet hole (10) with the shell inner wall upper air outlet hole (12) and the first shell outer wall lower air outlet hole (13) with the shell inner wall lower air outlet hole (15), thereby realizing alternating air intake and exhaust of the upper and lower cavities.

6. The vibration impact hammer device according to claim 1, characterized in that: The length of the side end surface of the top wall of the impact hammer housing (1) is more than twice the length of the end of the upper reversing block of the reversing slider (7) in contact with it, and the length of the side end surface of the bottom wall of the impact hammer housing (1) is more than twice the length of the end of the lower reversing block of the reversing slider (7) in contact with it.

7. The vibration impact hammer device according to any one of claims 1 to 6, characterized in that: The upper air inlet (5) is arranged at the lower part of the side end surface of the top wall of the impact hammer housing (1), and the lower air inlet (6) is arranged at the upper part of the side end surface of the bottom wall of the impact hammer housing (1); the upper air inlet (5) and the lower air inlet (6) are connected and are always supplied with a power source medium. As the reversing slider (7) reciprocates up and down, the upper reversing block and the lower reversing block respectively alternately block the upper air inlet (5) and the lower air inlet (6).

8. The vibration impact hammer device according to any one of claims 1 to 6, characterized in that: The upper air inlet hole (5) is arranged on the lower end surface of the top wall of the impact hammer housing (1), and the lower air inlet hole (6) is arranged on the upper end surface of the bottom wall of the impact hammer housing (1); the upper air inlet hole (5) and the lower air inlet hole (6) are alternately fed with air.

9. The vibration impact hammer device according to claim 8, characterized in that: The front end face of the outer wall of the impact hammer housing (1) is provided with an air inlet hole (22) on the outer wall of the housing and an air inlet hole (23) on the lower wall of the housing, and the rear end face of the outer wall of the impact hammer housing (1) is provided with an air outlet hole (24) on the second outer wall of the housing and an air outlet hole (25) on the lower wall of the housing; the reversing slider (7) is provided with an air inlet connection hole (26), and the air inlet hole (22) on the outer wall of the housing, the air inlet hole (23) on the lower wall of the housing, the air outlet hole (24) on the second outer wall of the housing, the air outlet hole (25) on the lower wall of the housing and the air inlet connection hole (26) are located in the same vertical plane; the air outlet hole (24) on the second outer wall of the housing The upper air inlet (22) on the outer wall of the shell and the lower air inlet (23) on the outer wall of the shell are always supplied with power source medium. As the reversing slider (7) moves up and down, the air inlet connecting hole (26) alternately connects the upper air inlet (22) on the outer wall of the shell with the upper air outlet (24) on the outer wall of the second shell, and the lower air inlet (23) on the outer wall of the shell with the lower air outlet (25) on the outer wall of the second shell, so that the upper air inlet (5) and the lower air inlet (6) are alternately connected.

10. The vibration impact hammer device according to claim 9, characterized in that: The air outlet hole (10) on the outer wall of the first shell, the air outlet hole (13) on the lower outer wall of the first shell, the air inlet hole (22) on the outer wall of the shell, and the air inlet hole (23) on the lower outer wall of the shell are all connected to the gas circulation device to achieve intermittent circulation of air intake in the upper and lower chambers of the airtight chamber.

11. The vibration impact hammer device according to claim 1, characterized in that: A sealing ring or sealing strip is provided between the upper end cover (2) and the impact hammer housing (1), and between the lower end cover (3) and the impact hammer housing (1).

12. The vibration impact hammer device according to claim 1, characterized in that: A sealing ring (16) is provided on the contact surface of the sliding portion of the impact hammer (4) that contacts the left and right inner walls of the impact hammer housing (1).

13. The vibration impact hammer device according to claim 1, characterized in that: The upper end cover (2) and the top wall of the impact hammer housing (1) are provided with openings, and the hammering part of the impact hammer (4) is partially exposed from the upper end cover (2).

14. The vibration impact hammer device according to claim 13, characterized in that: A sealing ring (16) is arranged on a contact surface of the impact hammer housing (1) and / or the upper end cover (2) that contacts the hammering part of the impact hammer (4).

15. The vibratory impact hammer device according to any one of claims 12 and 14, characterized in that: The sealing ring (16) is made of one of metal, ceramic, plastic, rubber, graphite, or a composite material of the above materials.

16. The vibration impact hammer device according to claim 1, characterized in that: The cross section of the hammering part of the impact hammer (4) is one of a circular, a square, and a long strip, or a combination of the above.

17. The vibration impact hammer device according to claim 1, characterized in that: The cross-sectional area of ​​the hammering part of the impact hammer (4) is smaller than the cross-sectional area of ​​the sliding part, and the cross-sectional area of ​​the sliding part is 105% to 500% of the cross-sectional area of ​​the hammering part.

18. The vibration impact hammer device according to claim 1, characterized in that: The vibration impact hammer device is placed around the ingot (17), on two opposite sides, and on one side to strike the shell of the ingot with the liquid core.

19. The vibratory impact hammer device according to claim 18, characterized in that: A plurality of vibration impact hammer devices are placed on one side of the casting billet (17).

20. The vibratory impact hammer device according to claim 18, characterized in that: The vibrating impact hammer device strikes the central area of ​​the side surface of the casting strand (17).

21. The vibratory impact hammer device according to claim 1, characterized in that: The vibration impact hammer device is placed at the crystallizer outlet, and / or the secondary cooling zone, and / or the solidification end; one or more groups are placed at each position.

22. The vibratory impact hammer device according to claim 1, characterized in that: The power source medium is gas or liquid; the pressure of the power source medium is 0.2-15 MPa.

23. The vibratory impact hammer device according to claim 1, characterized in that: The frequency of the reciprocating vibration of the impact hammer (4) is 0.2 to 150 Hz, and the vibration amplitude or stroke S of the impact hammer (4) is 10 to 900 mm.

24. The vibratory impact hammer device according to claim 1, characterized in that: An oil filling hole (18) is provided on the impact hammer housing (1).

25. The vibratory impact hammer device according to claim 1, characterized in that: A water cooling channel (19) is arranged outside the impact hammer housing (1).

26. The vibratory impact hammer device according to claim 1, characterized in that: The hammering part of the impact hammer (4) is provided with a protective cover (20), and is fixed to the hammering part of the impact hammer (4) by means of bolts or pins (21).

27. The vibratory impact hammer device according to claim 1, characterized in that: The shape of the contact surface between the protective cover (20) and the casting blank (17) is the same as the shape of the struck casting blank (17), or the shape of the contact surface between the protective cover (20) and the casting blank (17) is flat, concave arc-shaped or convex arc-shaped.

28. The vibratory impact hammer device according to claim 1, characterized in that: The vibration impact hammer device is suitable for square billets, rectangular billets, plate billets or round billets.

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