Steel bar cutting-off equipment for concrete sleeper

Abstract

The utility model discloses steel bar cutting equipment for a concrete sleeper, which belongs to the technical field of steel bar cutting equipment and comprises a combined frame, an upper cutter group, an upper cutter driving mechanism, a lower cutter group, a lower cutter driving mechanism, a middle cutter group and a middle cutter driving mechanism. The middle cutter driving mechanism comprises a second hydraulic cylinder and a connecting rod; two ends of the connecting rod are respectively hinged with the second hydraulic cylinder and the middle cutter group; the middle knife group comprises a middle knife rest and a middle blade; supporting plates are arranged on the outer side of the combined frame, spring sliding columns are vertically arranged on the supporting plates, and U-shaped supporting frames are arranged on the tops of the spring sliding columns. An inserting groove is transversely formed in the outer side surface of the middle knife rest, and the two top ends of the U-shaped supporting frame are bent and inserted into the inserting groove of the middle knife rest. According to the utility model, the hydraulic system drives each cutter group to impact a reinforcing steel bar, so that rapid fracture is realized; and traditional friction toothless saw cutting or manual electric welding cutting is avoided, the cutting efficiency is improved, and the finished product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar cutting equipment, in particular to a steel bar cutting equipment used for concrete sleepers. Background Art

[0002] In the production process of concrete sleepers, 2×4 or 2×5 combination molds are mostly used. After the finished sleepers are demoulded, the prestressed steel bars between the finished sleepers need to be cut before they can be stacked. Therefore, cutting the steel bars between the sleepers has become an indispensable process. In traditional sleeper production, friction toothless saws are mostly used for cutting, or high temperatures generated by artificial electric welding arcs are used for cutting.

[0003] Of the two methods mentioned above, the friction toothless saw is dangerous and produces huge noise during cutting; the manual electric welding cutting has high labor costs, the welding arc is harmful to human eyes, and the arc generates a large amount of harmful gases. In addition, the end face of the steel bar cut by electric welding is uneven and the surface is black, resulting in poor appearance quality of the finished sleeper; in some steel bar cutting equipment, the knives are in hard contact and the blades are easily damaged. Utility Model Content

[0004] The utility model aims to provide a steel bar cutting device for concrete sleepers, so as to solve the problems in the above-mentioned background technology that the steel bar cutting of sleepers is high in risk, causes great environmental pollution, affects the quality of finished products, and the hard contact between the knives causes the blades to be easily damaged.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steel bar cutting device for concrete sleepers, comprising a combined frame, an upper knife group, an upper knife driving mechanism, a lower knife group, a lower knife driving mechanism, a middle knife group and a middle knife driving mechanism; the upper knife group is slidably arranged in the combined frame; the upper knife driving mechanism is fixed on the combined frame and connected to the upper knife group; the lower knife group is slidably arranged in the combined frame; the lower knife driving mechanism is fixed on the combined frame and connected to the lower knife group; the middle knife group is slidably arranged on the combined frame, and its upper and lower sides are respectively matched with the upper knife group and the lower knife group; the middle knife driving mechanism is fixed on the combined frame;

[0007] The middle knife driving mechanism comprises a second hydraulic cylinder and a connecting rod; the second hydraulic cylinder is arranged on the top plate of the top frame; the two ends of the connecting rod are respectively hinged to the second hydraulic cylinder and the middle knife group;

[0008] The middle blade group includes a middle blade holder and a middle blade; the middle blade is arranged on the upper and lower sides of the middle blade holder;

[0009] A support plate is arranged on the outer side of the combined frame, a spring slide column is vertically arranged on the support plate, and a U-shaped support frame is arranged on the top of the spring slide column; a slot is horizontally opened on the outer surface of the middle tool holder, and two top ends of the U-shaped support frame are bent and inserted into the slot of the middle tool holder.

[0010] Furthermore, the combined frame includes a top frame, a cutting frame and a bottom frame from top to bottom; the top frame is a rectangular frame on which a top plate and a bottom plate are arranged; the cutting frame is a rectangular frame on which limit strip holes are vertically opened on the left and right sides, and a mounting plate is arranged at the bottom; the bottom frame is arranged on the ground.

[0011] Furthermore, the middle knife driving mechanism also includes a bracket, which is a U-shaped frame, including two end rods and a web rod arranged between the two end rods, and the end rods are fixedly connected to the outer side of the combined frame.

[0012] Furthermore, a connecting portion is provided at the end of the middle tool holder, and the right side of the connecting portion is hinged to the connecting rod; and rings are symmetrically provided on the front and rear sides of the connecting portion, and the rings are slidably sleeved on the end rod of the bracket.

[0013] Furthermore, a convex strip is arranged on the left side of the connecting portion, a vertical groove is arranged on the convex strip, waist-shaped holes are arranged on the two side walls of the vertical groove, the middle tool holder is inserted into the vertical groove, and is connected to the convex strip by bolts.

[0014] Furthermore, the upper knife driving mechanism is a first hydraulic cylinder, and the first hydraulic cylinder is fixed on the bottom plate of the top frame.

[0015] Furthermore, the upper knife group is arranged in the cutting frame, including an upper knife holder and an upper knife blade; the upper knife holder is fixedly connected to the oil plug of the first hydraulic cylinder, and sliders are arranged at both ends thereof, and the sliders are slidably arranged in the guide rails of the cutting frame; the upper knife blade is fixedly arranged below the upper knife holder.

[0016] Furthermore, the lower knife driving mechanism includes a third hydraulic cylinder and a lifting guide block; the third hydraulic cylinder is fixed on the mounting plate of the cutting frame; the lifting guide block is slidably arranged on the mounting plate of the cutting frame, and is connected to the piston of the third hydraulic cylinder, and the lifting guide block includes a translation surface and an upward movement surface; the translation surface is flush with the lowest point of the upward movement surface; the upward movement surface is arc-shaped.

[0017] Furthermore, the lifting guide block also includes a limit plate, and the limit plates are respectively arranged at outer ends of the translation surface and the upward movement surface that are away from each other.

[0018] Furthermore, the lower knife group includes a base, a lower knife holder and a lower blade; the base is fixed on the mounting plate of the cutting frame, on which a vertical plate is fixed, and a long hole is opened on the vertical plate; the bottom of the lower knife holder is in contact with the lifting guide block, and a sliding rod is provided on one side of the lower knife holder, and the sliding rod is slidably set in the long hole of the base; the lower blade is fixed on the top of the lower knife holder.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model provides a steel bar cutting device for concrete sleepers. The spring slide column cooperates with the slot of the middle knife holder through a U-shaped support frame, and can elastically support the middle knife group, so that it has the ability to move up and down, avoiding hard damage between the blades. At the same time, the spring slide column does not contact the blade, thereby extending its service life.

[0021] 2. The utility model provides a steel bar cutting device for concrete sleepers. When the hydraulic system is started, the plunger pump starts to pump the hydraulic oil into the energy storage tank and build up the pressure to 12MPA. When shearing is required, the three-position four-way valve is opened, and the hydraulic oil pumped in by the plunger pump and the high-pressure oil stored in the energy storage tank push the three groups of hydraulic cylinders, thereby driving each knife group to impact the steel bar and implement shearing. Due to the joint action of the energy storage tank, the steel bar is instantly subjected to a large shear force, achieving rapid fracture.

[0022] 3. The utility model provides a steel bar cutting device for concrete sleepers, which avoids traditional friction toothless saw cutting or manual electric welding cutting, reduces on-site pollution, improves cutting efficiency, and improves the quality of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the steel bar cutting device involved in the utility model;

[0024] Figure 2 This is a front view of the steel bar cutting device involved in the utility model;

[0025] Figure 3 It is a structural schematic diagram of the lower knife group involved in the utility model;

[0026] Figure 4 This is a schematic diagram of the cooperation between the middle knife holder and the middle blade involved in the utility model;

[0027] Figure 5 For this utility model Figure 1 A magnified view of the structure at A;

[0028] Figure 6 It is a schematic diagram of the cooperation between the spring slide column and the middle knife group involved in the utility model.

[0029] In the figure: 1-combined frame, 11-top frame, 12-cutting frame, 13-bottom frame, 2-upper knife group, 21-upper knife holder, 3-upper knife driving mechanism, 31-first hydraulic cylinder, 4-lower knife group, 41-lower knife holder, 42-pedestal, 5-lower knife driving mechanism, 51-third hydraulic cylinder, 52-lifting guide block, 6-middle knife group, 61-middle knife holder, 62-middle blade, 63-connecting part, 7-middle knife driving mechanism, 71-second hydraulic cylinder, 72-connecting rod, 73-bracket. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] like Figure 1 , 2 As shown, the utility model provides a steel bar cutting device for concrete sleepers, comprising a combined frame 1, an upper knife group 2, an upper knife driving mechanism 3, a lower knife group 4, a lower knife driving mechanism 5, a middle knife group 6 and a middle knife driving mechanism 7; the upper knife group 2 is slidably arranged in the combined frame 1; the upper knife driving mechanism 3 is fixed on the combined frame 1 and connected to the upper knife group 2; the lower knife group 4 is slidably arranged in the combined frame 1; the lower knife driving mechanism 5 is fixed on the combined frame 1 and connected to the lower knife group 4; the middle knife group 6 is slidably arranged on the combined frame 1, and its upper and lower sides are respectively matched with the upper knife group 2 and the lower knife group 4; the middle knife driving mechanism 7 is fixed on the combined frame 1 and connected to the middle knife group 6. When cutting steel bars, the sleeper steel bars are located between the middle knife group 6 and the upper knife group 2, and between the middle knife group 6 and the lower knife group 4. Through the cooperation of the three knife groups, the cutting of double-layer sleeper steel bars is achieved.

[0032] The combined frame 1 includes a top frame 11, a cutting frame 12 and a bottom frame 13 from top to bottom; the top frame 11 is a rectangular frame, on which a top plate and a bottom plate are arranged; the cutting frame 12 is a rectangular frame, on which limit strip holes are vertically opened on the left and right sides, and a mounting plate is arranged at the bottom; the bottom frame 13 is arranged on the ground and is used to support the entire fixing device.

[0033] The upper knife driving mechanism 3 is a first hydraulic cylinder 31 , and the first hydraulic cylinder 31 is fixed on the bottom plate of the top frame 11 .

[0034] The upper knife group 2 is arranged in the cutting frame 12, and includes an upper knife holder 21 and an upper blade; the upper knife holder 21 is fixedly connected to the oil plug of the first hydraulic cylinder 31, and sliders are arranged at both ends thereof, and the sliders are slidably arranged on the upper part of the limit bar hole of the cutting frame 12 to ensure the stability of the upper knife group 2 during movement; the upper blade is fixedly arranged below the upper knife holder 21. Preferably, the cross section of the upper knife holder 21 is U-shaped, and includes two parallel steel plates and a connecting plate welded together; the upper blade is inserted between the two steel plates and connected to the steel plates through a pin shaft, and the upper blade is in close contact with the two steel plates.

[0035] The lower knife driving mechanism 5 includes a third hydraulic cylinder 51 and a lifting guide block 52; the third hydraulic cylinder 51 is fixed on the mounting plate of the cutting frame 12; the lifting guide block 52 is slidably arranged on the mounting plate of the cutting frame 12, and is connected to the piston of the third hydraulic cylinder 51. The lifting guide block 52 includes a translation surface, an upward movement surface and a limit plate. The translation surface is flush with the lowest point of the upward movement surface, and the upward movement surface is arc-shaped. The limit plates are respectively arranged at the outer ends of the translation surface and the upward movement surface away from each other to prevent the lower knife group 4 from falling from the lifting guide block 52.

[0036] like Figure 3 As shown, the lower blade assembly 4 includes a base 42, a lower blade holder 41 and a lower blade; the base 42 is fixed on the mounting plate of the cutting frame 12, a vertical plate is fixed on it, and a long strip hole is opened on the vertical plate; the bottom of the lower blade holder 41 contacts the lifting guide block 52, and a sliding rod is fixed on one side of the lower blade holder 41, which is set in the long strip hole and can slide up and down along the long strip hole; the lower blade is fixed on the top of the lower blade holder 41. Preferably, both ends of the lower blade holder 41 are slidably set at the lower part of the limit strip hole.

[0037] When the third hydraulic cylinder 51 drives the lifting guide block 52 to move forward, the lower tool holder 41 is gradually lifted along the lifting guide block 52, and the slide bar moves upward in the long hole; conversely, when the third hydraulic cylinder 51 drives the lifting guide block 52 to move backward, the lower tool holder 41 is gradually lowered along the lifting guide block 52, and the slide bar moves downward in the long hole.

[0038] The middle knife driving mechanism 7 includes a second hydraulic cylinder 71, a connecting rod 72, and a bracket 73; the second hydraulic cylinder 71 is arranged on the top plate of the top frame 11; the two ends of the connecting rod 72 are respectively hinged to the second hydraulic cylinder 71 and the middle knife group 6; the bracket 73 is a U-shaped frame, including two end rods and a web rod arranged between the two end rods, and the end rod is fixedly connected to the outer side of the cutting frame 12. Preferably, the middle part of the connecting rod 72 is connected to the top frame 11 through a stabilizing rod, and the stabilizing rod is symmetrically arranged on the front and rear sides of the connecting rod, one end of which is fixedly connected to the top frame 11, and the other end is hinged to the connecting rod 72; the two ends of the web rod of the bracket 73 are fixedly connected to the top frame 11 through an inclined rod to enhance the stability of the bracket 73.

[0039] like Figure 4 , 5As shown, the middle knife group 6 includes a middle knife holder 61 and a middle blade 62; the middle knife holder 61 is slidably arranged in the limit bar hole of the cutting frame 12, and one end thereof is hinged to the connecting rod 72. Preferably, a connecting portion 63 is arranged at the end of the middle knife holder 61, a double-ear plate is arranged on the right side of the connecting portion 63, and the connecting rod 72 is hinged to the double-ear plate through a pin. A convex strip is arranged on the left side of the connecting portion 63, and a vertical groove is provided on the convex strip. The end of the middle knife holder 61 is slidably arranged in the vertical groove up and down, and waist-shaped holes are provided on the two side walls of the vertical groove. The middle knife holder 61 is connected to the convex strip by bolts to limit the middle knife holder 61. Rings are symmetrically arranged on the front and rear sides of the connecting portion 63, and the rings are sleeved on the end rods of the bracket 73 and can move along the end rods to keep the middle knife holder 61 horizontal; the middle blade 62 is arranged on the upper and lower sides of the middle knife holder 61.

[0040] like Figure 6 As shown, a support plate is arranged on the outside of the cutting frame 12, and a spring slide column is arranged vertically on the support plate. The top of the spring slide column is connected to the side of the middle knife holder 61 and provides vertical support for the middle knife holder 61. During the steel bar cutting process, the spring slide column provides the middle knife holder 61 with vertical movement ability, so that the middle knife holder 61 moves up and down in the vertical groove of the connecting portion 63 to avoid hard wear between the blades. Preferably, a slot is horizontally provided on the outer surface of the middle knife holder 61, and a U-shaped support frame is arranged on the top of the spring slide column. The two top ends of the U-shaped support frame are bent and inserted into the slot of the middle knife holder 61 to realize the connection between the spring slide column and the middle knife holder 61.

[0041] The length of the upper cutter group 2, the lower cutter group 4 and the middle cutter group 6 can allow two groups of sleepers to cut simultaneously. The upper blade, the lower blade and the middle blade 62 are all provided with the blade tip of the inclined surface, which is convenient for extruding and cutting the steel bar.

[0042] The upper knife drive mechanism 3, the lower knife drive mechanism 5 and the middle knife drive mechanism 7 are all connected to the hydraulic system, and the hydraulic system is connected to a control system. The hydraulic system is controlled by the control system, and then the states of the three drive mechanisms are controlled. Preferably, the upper knife drive mechanism 3, the lower knife drive mechanism 5 and the middle knife drive mechanism 7 all use double-acting hydraulic cylinders with a stroke of 150 mm and a cylinder diameter of 80, which can generate a total shear force of 10 tons when the system pressure is 10 MPA. The hydraulic system includes a high-pressure plunger pump, a three-position four-way valve, a one-way valve, a pressure switch and an energy storage tank, etc., and a hydraulic lock and a balance valve are provided on the oil inlet path. At the same time, in order to increase the shearing speed and initial pressure during shearing, the system is also provided with an energy storage tank.

[0043] When the hydraulic system is started, the plunger pump starts to pump the hydraulic oil into the energy storage tank and build up the pressure to 12MPA. When shearing is required, the three-position four-way valve opens, and the hydraulic oil pumped in by the plunger pump and the high-pressure oil stored in the energy storage tank push the three groups of hydraulic cylinders, which in turn drive each knife group to impact the steel bars and implement shearing. Due to the joint action of the energy storage tank, the steel bars are instantly subjected to a large shear force, resulting in rapid fracture. When the shearing is completed, the three-position four-way valve is reversed, the hydraulic cylinder retracts, and the hydraulic oil is injected into the energy storage tank at the same time. When the pressure reaches 12MPA, the pressure switch is activated, the plunger pump stops, the three-position four-way valve is closed, and the hydraulic lock locks the system pressure, waiting for the next shearing action.

[0044] When in use, the device is installed at the gap between the demoulding roller and the finished product roller in the sleeper production line, so that the height of the middle blade matches the height of the sleeper steel bar to be cut; then the gap between the two sleepers is controlled to correspond to each knife group; when cutting, the hydraulic system is started, the lower knife group enters the cutting position, and the middle knife group enters the cutting position subsequently, and then the first hydraulic cylinder 31 is actuated to push the upper knife, so that the upper blade, the steel bar, the middle blade 62, the steel bar, and the lower blade are bitten, squeezed and deformed, and the steel bar is cut; after the cutting is completed, the oil circuit is instantly depressurized, and the cutting state can be identified by pressure sensors and wire displacement sensors, so that the knife groups are separated to allow the sleeper to pass through the space.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel bar cutting device for concrete sleepers, characterized in that: The invention comprises a combined frame (1), an upper knife group (2), an upper knife driving mechanism (3), a lower knife group (4), a lower knife driving mechanism (5), a middle knife group (6) and a middle knife driving mechanism (7); the upper knife group (2) is slidably arranged in the combined frame (1); the upper knife driving mechanism (3) is fixedly arranged on the combined frame (1) and connected to the upper knife group (2); the lower knife group (4) is slidably arranged in the combined frame (1); the lower knife driving mechanism (5) is fixedly arranged on the combined frame (1) and connected to the lower knife group (4); the middle knife group (6) is slidably arranged on the combined frame (1), and its upper and lower sides respectively cooperate with the upper knife group (2) and the lower knife group (4); the middle knife driving mechanism (7) is fixedly arranged on the combined frame (1); The middle knife driving mechanism (7) comprises a second hydraulic cylinder (71) and a connecting rod (72); the second hydraulic cylinder (71) is arranged on the top plate of the top frame (11); the two ends of the connecting rod (72) are respectively hinged to the second hydraulic cylinder (71) and the middle knife group (6); The middle blade assembly (6) comprises a middle blade holder (61) and a middle blade (62); the middle blade (62) is arranged on the upper and lower sides of the middle blade holder (61); A support plate is arranged on the outside of the combined frame (1), a spring slide column is arranged vertically on the support plate, and a U-shaped support frame is arranged on the top of the spring slide column; a slot is horizontally provided on the outer surface of the middle tool holder (61), and two top ends of the U-shaped support frame are bent and inserted into the slot of the middle tool holder (61).

2. A steel bar cutting device for concrete sleepers according to claim 1, characterized in that: The combined frame (1) comprises, from top to bottom, a top frame (11), a cutting frame (12) and a bottom frame (13); the top frame (11) is a rectangular frame body, on which a top plate and a bottom plate are arranged; the cutting frame (12) is a rectangular frame body, on which limit strip holes are vertically provided on left and right sides, and a mounting plate is arranged at the bottom; the bottom frame (13) is arranged on the ground.

3. The steel bar cutting device for concrete sleepers according to claim 1, characterized in that: The middle knife driving mechanism (7) further comprises a bracket (73), wherein the bracket (73) is a U-shaped bracket, comprising two end rods and a web rod arranged between the two end rods, wherein the end rods are fixedly connected to the outer side of the combined frame (1).

4. The steel bar cutting device for concrete sleepers according to claim 3, characterized in that: A connecting portion (63) is provided at the end of the middle tool holder (61), and the right side of the connecting portion (63) is hinged to the connecting rod (72); sleeve rings are symmetrically provided on the front and rear sides of the connecting portion (63), and the sleeve rings are slidably sleeved on the end rod of the bracket (73).

5. The steel bar cutting device for concrete sleepers according to claim 4, characterized in that: A convex strip is arranged on the left side of the connection portion (63), a vertical groove is arranged on the convex strip, waist-shaped holes are arranged on the two side walls of the vertical groove, and the middle tool holder (61) is inserted into the vertical groove and connected to the convex strip by bolts.

6. The steel bar cutting device for concrete sleepers according to claim 2, characterized in that: The upper knife driving mechanism (3) is a first hydraulic cylinder (31), and the first hydraulic cylinder (31) is fixedly arranged on the bottom plate of the top frame (11).

7. The steel bar cutting device for concrete sleepers according to claim 6, characterized in that: The upper knife assembly (2) is arranged in the cutting frame (12), and comprises an upper knife holder (21) and an upper knife blade; the upper knife holder (21) is fixedly connected to the oil plug of the first hydraulic cylinder (31), and sliders are arranged at both ends of the upper knife holder, and the sliders are slidably arranged in the guide rails of the cutting frame (12); the upper knife blade is fixedly arranged below the upper knife holder (21).

8. The steel bar cutting device for concrete sleepers according to claim 2, characterized in that: The lower knife driving mechanism (5) comprises a third hydraulic cylinder (51) and a lifting guide block (52); the third hydraulic cylinder (51) is fixedly mounted on a mounting plate of the cutting frame (12); the lifting guide block (52) is slidably mounted on the mounting plate of the cutting frame (12) and is connected to a piston of the third hydraulic cylinder (51); the lifting guide block (52) comprises a translation surface and an upward movement surface; the translation surface is flush with the lowest point of the upward movement surface; and the upward movement surface is arc-shaped.

9. The steel bar cutting device for concrete sleepers according to claim 8, characterized in that: The lifting guide block (52) further comprises a limit plate, wherein the limit plates are respectively arranged at outer ends of the translation surface and the upward movement surface which are away from each other.

10. The steel bar cutting device for concrete sleepers according to claim 8, characterized in that: The lower blade assembly (4) comprises a pedestal (42), a lower blade holder (41) and a lower blade; the pedestal (42) is fixedly mounted on a mounting plate of a cutting frame (12), a vertical plate is fixedly mounted on the pedestal, and a long hole is formed on the vertical plate; the bottom of the lower blade holder (41) contacts a lifting guide block (52), a sliding rod is arranged on one side of the lower blade holder, and the sliding rod is slidably arranged in the long hole of the pedestal (42); the lower blade is fixedly mounted on the top of the lower blade holder (41).

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