Roller press without roll gap difference

Abstract

The invention belongs to the technical field of roller presses, and particularly relates to a roller press without roll gap difference. According to the technical scheme, the roller press without the roller gap difference comprises a roller press rack, a fixed extrusion roller component is fixedly installed on the roller press rack, a movable extrusion roller component matched with the fixed extrusion roller component is movably arranged on the roller press rack, and hydraulic cylinder sets are installed on the left side and the right side of the roller press rack correspondingly; the output ends of the hydraulic cylinder groups on the left and right sides are correspondingly connected with the left and right sides of the movable extrusion roller component respectively; bearing seats are fixed to the left side and the right side of the roller press rack correspondingly, a torsion beam is rotationally connected between the two bearing seats, connecting rods are rotationally connected to the left side and the right side of the torsion beam correspondingly, a base is rotationally connected to the other ends of the connecting rods, and the base is fixedly connected with the movable extrusion roller component. The two bases are fixed to the symmetrical positions of the left side and the right side of the movable extrusion roller component. The invention provides a roller press without roll gap difference.

Description

Technical Field

[0001] The invention belongs to the technical field of roller presses, and in particular relates to a roller press without roller gap difference. Background Art

[0002] Roller presses are widely used for material grinding in industries such as building materials, cement, metallurgy, and mining. When the roller press is working, the gap between the two squeeze rollers is formed by the pressure of the material in the upper feeding bin and the reaction force of the material on the meshing force of the two rollers, which overcomes the pressure of the hydraulic system and is passively opened. However, due to factors such as the uneven particle size of the material itself and the segregation during the system feeding process, the width of the gap between the two squeeze rollers in the axial direction will have a certain deviation, which will lead to a gap difference between the two rollers.

[0003] The appearance of roll gap difference leads to roller grinding of the roller press, which directly affects the stability of the roller press system operation and the service life of the equipment, and then affects the production efficiency and cost. At present, the mainstream constant roll gap control of the roller press is mainly based on the electrical control hydraulic system for deviation correction, specifically, different pressures are applied to both sides of the extrusion roller to adjust the roll gap. However, in view of the characteristics of the above-mentioned roll gap formation, coupled with the hysteresis of electrical control and the limited pressure range of the hydraulic system, the roll gap difference can only be controlled within a certain range, and the deviation correction may even fail. The roll gap difference is too large and the main machine will stop.

[0004] The ideal state of zero roll gap cannot be fully achieved by relying solely on electrical deviation correction. Moreover, frequent pressure adjustment during electrical deviation correction will increase the risk of problems in the hydraulic system, such as unstable operation of the hydraulic system, shortened life of related valve groups, oil leakage in the system and failure to maintain pressure, which will have a negative impact on equipment stability and production continuity. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the object of the present invention is to provide a roller press without roller gap.

[0006] The technical solution adopted by the present invention is:

[0007] A roller press without roller gap difference comprises a roller press frame, a fixed squeezing roller component is fixedly installed on the roller press frame, a movable squeezing roller component cooperating with the fixed squeezing roller component is movably arranged on the roller press frame, hydraulic cylinder groups are installed on the left and right sides of the roller press frame, and the output ends of the hydraulic cylinder groups on the left and right sides are respectively connected to the left and right sides of the movable squeezing roller component; bearing seats are fixed on the left and right sides of the roller press frame, a torsion beam is rotatably connected between the two bearing seats, the left and right sides of the torsion beam are rotatably connected to connecting rods, the other end of the connecting rod is rotatably connected to a base, the base is fixedly connected to the movable squeezing roller component, and the two bases are fixed at symmetrical positions on the left and right sides of the movable squeezing roller component.

[0008] Since the connecting rods on both sides are rotatably connected to the same torsion beam, when the roller press is working, the mechanical correction control device composed of two bearing seats, torsion beams, two connecting rods and two bases forces the movable extrusion roller component to move forward and backward synchronously on the left and right sides, limiting the deflection of the extrusion roller. The eccentric load of the movable extrusion roller component is transmitted to the frame through the mechanical correction control device for balancing.

[0009] The present invention can prevent the extrusion roller from being skewed to form a roller gap difference, ensure the roller surfaces are parallel, effectively avoid the eccentric roller grinding caused by the roller gap difference, maintain the working stability of the roller press and the grinding system to the greatest extent, thereby reducing energy consumption, and improving the grinding efficiency and equipment life.

[0010] As a preferred solution of the present invention, the hydraulic cylinder group includes two hydraulic cylinders, which are arranged up and down, and the left and right sides of the movable squeezing roller component are connected with a push plate, and the two hydraulic cylinders of the hydraulic cylinder group are fixedly connected to the same push plate. The two hydraulic cylinders form a group to form a hydraulic cylinder group to ensure sufficient thrust.

[0011] As a preferred solution of the present invention, both upper and lower sides of the roller press frame are provided with limit frames for guiding the movable squeezing roller component. The limit frames accurately guide the movable squeezing roller component to ensure that the movable squeezing roller component does not deflect up and down when moving.

[0012] As a preferred solution of the present invention, the bearing seat and the torsion beam are connected via a first joint bearing.

[0013] As a preferred solution of the present invention, both left and right sides of the torsion beam are fixedly connected with a first pin shaft, and the first pin shaft is connected to the connecting rod via a second joint bearing.

[0014] As a preferred solution of the present invention, a second pin is fixedly connected to the base, and one end of the connecting rod away from the torsion beam is connected to the second pin via a third joint bearing.

[0015] As a preferred embodiment of the present invention, the present invention also includes a hydraulic system, the hydraulic system includes a hydraulic valve group, the hydraulic valve group has a first oil circuit interface and a second oil circuit interface, the rod chambers of the hydraulic cylinder groups on the left and right sides of the roller press frame are connected to the first oil circuit interface through pipelines, and the rodless chambers of the hydraulic cylinder groups on the left and right sides of the roller press frame are connected to the second oil circuit interface through pipelines.

[0016] During operation, the hydraulic oil reaches the rod chamber or rodless chamber of all hydraulic cylinders through the control of the hydraulic valve group to pressurize, maintain pressure or retract the roller. Since the bearing seats on both sides of the squeeze roller move forward and backward synchronously, the rod chamber and rodless chamber of the left and right hydraulic cylinders are connected in series respectively to keep the hydraulic pressure on both sides consistent, avoiding the pressure difference from being transmitted to the mechanical deviation correction control device through the bearing seat. Extra eccentric load force.

[0017] The present invention connects the rod chamber and rodless chamber of the hydraulic cylinder on the left and right sides of the roller press in series, and the oil circuits are connected. The original two sets of control valve groups, pressure gauges, and sensors are reduced to one set, and the original complicated electrical control logic and interlocking of roller gap correction are removed, so that the hydraulic system design function is simpler, the hydraulic components are fewer, and the hydraulic system operation is more stable and reliable. Due to the simplification of the hydraulic system, the number of failure points can be reduced, and the manufacturing cost and maintenance cost can be reduced.

[0018] As a preferred solution of the present invention, the hydraulic system further comprises a hydraulic station, and an oil outlet and an oil return port of the hydraulic station are respectively connected to the hydraulic valve group through pipelines.

[0019] As a preferred solution of the present invention, the hydraulic valve group is connected to a pressure gauge and a sensor via a pipeline.

[0020] As a preferred solution of the present invention, the hydraulic valve group is connected to an accumulator group via a pipeline.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention can prevent the extrusion roller from being skewed to form a roller gap difference, ensure the parallelism of the roller surfaces, effectively avoid the eccentric roller grinding caused by the roller gap difference, and maintain the working stability of the roller press and the grinding system to the greatest extent, thereby reducing energy consumption, improving grinding efficiency and equipment life.

[0023] 2. The present invention connects the rod chamber and rodless chamber of the hydraulic cylinder on the left and right sides of the roller press in series, and the oil circuits are connected. The original two sets of control valve groups, pressure gauges, and sensors are reduced to one set, and the original complicated electrical control logic and interlocking of roller gap correction are removed, making the hydraulic system design function simpler, with fewer hydraulic components, and the hydraulic system operation more stable and reliable. Due to the simplification of the hydraulic system, the number of failure points can be reduced, and the manufacturing cost and maintenance cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a stereogram of the present invention;

[0025] Figure 2 It is the front view of the present invention;

[0026] Figure 3 yes Figure 2 Schematic diagram of the cross-section structure along line AA;

[0027] Figure 4 yes Figure 2 Schematic diagram of the cross-section structure along line BB;

[0028] Figure 5 It is a schematic diagram of the hydraulic system of the present invention;

[0029] Figure 6 It is the principle diagram of the hydraulic system of the existing roller press.

[0030] In the figure: 1-roller press frame; 2-fixed squeezing roller component; 3-movable squeezing roller component; 4-hydraulic cylinder group; 5-bearing seat; 6-torsion beam; 7-connecting rod; 8-base; 9-hydraulic system; 41-hydraulic cylinder; 51-first joint bearing; 61-first pin shaft; 62-second joint bearing; 81-second pin shaft; 82-third joint bearing; 91-hydraulic valve group; 92-hydraulic station; 93-pressure gauge and sensor; 94-accumulator group. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0033] like Figure 1 to Figure 4 As shown, the roller press without roller gap difference of this embodiment includes a roller press frame 1, a fixed squeezing roller component 2 is fixedly installed on the roller press frame 1, a movable squeezing roller component 3 cooperating with the fixed squeezing roller component 2 is movably arranged on the roller press frame 1, hydraulic cylinder groups 4 are installed on the left and right sides of the roller press frame 1, and the output ends of the hydraulic cylinder groups 4 on the left and right sides are respectively connected to the left and right sides of the movable squeezing roller component 3; bearing seats 5 are fixed on the left and right sides of the roller press frame 1, a torsion beam 6 is rotatably connected between the two bearing seats 5, and the left and right sides of the torsion beam 6 are rotatably connected to connecting rods 7, and the other end of the connecting rod 7 is rotatably connected to a base 8, the base 8 is fixedly connected to the movable squeezing roller component 3, and the two bases 8 are fixed at symmetrical positions on the left and right sides of the movable squeezing roller component 3.

[0034] Since the connecting rods 7 on both sides are rotatably connected to the same torsion beam 6, when the roller press is working, the mechanism composed of the two bearing seats 5, the torsion beam 6, the two connecting rods 7 and the two bases 8 forces the movable extrusion roller component 3 to move forward and backward synchronously on the left and right sides, limiting the deflection of the extrusion roller. The eccentric load of the movable extrusion roller component 3 is transmitted to the frame through the mechanical correction control device for balancing.

[0035] When a large material enters the right side of the gap between the extrusion rollers of the roller press or the incoming material on the right side is more than the left side due to material separation, the right side of the gap tends to be stretched wider than the left side, which is specifically manifested in that the right side base 8 moves toward the hydraulic cylinder 41 side along with the movable extrusion roller component 3. Since the two connecting rods 7 are rotatably connected to the same torsion beam 6, the right side base 8 transmits the movement trend to the left side base 8 through the connecting rod 7 and the torsion beam 6, allowing the left and right sides of the movable extrusion roller to move synchronously. At this time, the left side of the gap between the extrusion rollers will be synchronously stretched open by the right side tension transmitted through the mechanical deviation correction control device, and the material will tend to be filled to the left side. The amount of material between the left side gap increases, stretching the left side gap to form a dynamic balance, and realizing the roller press without gap difference operation. Similarly, when the incoming material on the left side is more than the right side due to material separation, the principle is the same.

[0036] The present invention can prevent the extrusion roller from being skewed to form a roller gap difference, ensure the roller surfaces are parallel, effectively avoid the eccentric roller grinding caused by the roller gap difference, maintain the working stability of the roller press and the grinding system to the greatest extent, thereby reducing energy consumption, and improving the grinding efficiency and equipment life.

[0037] Specifically, the hydraulic cylinder group 4 includes two hydraulic cylinders 41, which are arranged up and down, and the left and right sides of the movable squeezing roller component 3 are connected with a push plate, and the two hydraulic cylinders 41 of the hydraulic cylinder group 4 are fixedly connected to the same push plate. The two hydraulic cylinders 41 form a group to form a hydraulic cylinder group 4, which ensures sufficient thrust.

[0038] In order to achieve upper and lower limit, the upper and lower sides of the roller press frame 1 are provided with limit frames for guiding the movable squeezing roller component 3. The limit frames accurately guide the movable squeezing roller component 3 to ensure that the movable squeezing roller component 3 does not deflect up and down when moving.

[0039] The bearing seat 5 and the torsion beam 6 are connected via a first spherical bearing 51 .

[0040] The left and right sides of the torsion beam 6 are both fixedly connected with a first pin shaft 61 , and the first pin shaft 61 is connected to the connecting rod 7 via a second joint bearing 62 .

[0041] The base 8 is fixedly connected with a second pin shaft 81 , and one end of the connecting rod 7 away from the torsion beam 6 is connected to the second pin shaft 81 via a third joint bearing 82 .

[0042] like Figure 5As shown, the present invention also includes a hydraulic system 9, which includes a hydraulic valve group 91. The hydraulic valve group 91 has a first oil circuit interface and a second oil circuit interface. The rod chambers of the hydraulic cylinder groups 4 on the left and right sides of the roller press frame 1 are connected to the first oil circuit interface through pipelines, and the rodless chambers of the hydraulic cylinder groups 4 on the left and right sides of the roller press frame 1 are connected to the second oil circuit interface through pipelines. The hydraulic system 9 also includes a hydraulic station 92, and the oil outlet and oil return port of the hydraulic station 92 are respectively connected to the hydraulic valve group 91 through pipelines. The hydraulic valve group 91 is connected to a pressure gauge and a sensor 93 through pipelines. The hydraulic valve group 91 is connected to an accumulator group 94 through pipelines.

[0043] During operation, the hydraulic oil reaches the rod chamber or rodless chamber of all hydraulic cylinders 41 through the control of the hydraulic valve group 91 to pressurize, maintain pressure or retract the roller. Since the bearing seats 5 on both sides of the squeeze roller move forward and backward synchronously, the rod chamber and rodless chamber of the left and right hydraulic cylinders 41 are connected in series respectively, so that the hydraulic pressure on both sides is always consistent, avoiding the pressure difference from being transmitted to the mechanical deviation correction control device through the bearing seat 5. Extra eccentric load force.

[0044] like Figure 6 As shown, in the conventional hydraulic system 9 of the current roller press, the hydraulic cylinders 41 on both sides of the squeezing roller are connected in parallel, and the pressure is controlled separately.

[0045] The present invention connects the rod chamber and the rodless chamber of the hydraulic cylinder 41 on the left and right sides of the roller press in series, and the oil circuits are connected. The original two sets of control valve groups, pressure gauges, and sensors are reduced to one set, and the original complicated electrical control logic and interlocking of the roller gap correction are removed, so that the design function of the hydraulic system 9 is simpler, the hydraulic components are fewer, and the operation of the hydraulic system 9 is more stable and reliable. Due to the simplification of the hydraulic system 9, the number of failure points can be reduced, and the manufacturing cost and maintenance cost can be reduced.

[0046] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A roller press without roller gap, characterized in that: The invention comprises a roller press frame (1), a fixed squeezing roller component (2) is fixedly mounted on the roller press frame (1), a movable squeezing roller component (3) cooperating with the fixed squeezing roller component (2) is movably arranged on the roller press frame (1), hydraulic cylinder groups (4) are mounted on both the left and right sides of the roller press frame (1), and the output ends of the hydraulic cylinder groups (4) on the left and right sides are respectively connected to the left and right sides of the movable squeezing roller component (3); bearing seats (5) are fixedly mounted on both the left and right sides of the roller press frame (1), a torsion beam (6) is rotatably connected between the two bearing seats (5), the left and right sides of the torsion beam (6) are rotatably connected to connecting rods (7), the other end of the connecting rod (7) is rotatably connected to a base (8), the base (8) is fixedly connected to the movable squeezing roller component (3), and the two bases (8) are fixed at symmetrical positions on the left and right sides of the movable squeezing roller component (3).

2. The roller press without roller gap according to claim 1, characterized in that: The hydraulic cylinder group (4) comprises two hydraulic cylinders (41), which are arranged up and down. The left and right sides of the movable squeezing roller component (3) are both connected to a pushing plate, and the two hydraulic cylinders (41) of the hydraulic cylinder group (4) are fixedly connected to the same pushing plate.

3. The roller press without roller gap according to claim 1, characterized in that: Limiting frames for guiding the movable squeezing roller component (3) are arranged on both the upper and lower sides of the roller press frame (1).

4. The roller press without roller gap according to claim 1, characterized in that: The bearing seat (5) and the torsion beam (6) are connected via a first joint bearing (51).

5. The roller press without roller gap according to claim 1, characterized in that: The left and right sides of the torsion beam (6) are both fixedly connected with a first pin shaft (61), and the first pin shaft (61) is connected to the connecting rod (7) via a second joint bearing (62).

6. The roller press without roller gap according to claim 1, characterized in that: A second pin shaft (81) is fixedly connected to the base (8), and one end of the connecting rod (7) away from the torsion beam (6) is connected to the second pin shaft (81) via a third joint bearing (82).

7. The roller press without roller gap according to claim 1, characterized in that: The invention also comprises a hydraulic system (9), wherein the hydraulic system (9) comprises a hydraulic valve group (91), wherein the hydraulic valve group (91) has a first oil circuit interface and a second oil circuit interface, wherein the rod chambers of the hydraulic cylinder groups (4) on the left and right sides of the roller press frame (1) are connected to the first oil circuit interface via a pipeline, and the rodless chambers of the hydraulic cylinder groups (4) on the left and right sides of the roller press frame (1) are connected to the second oil circuit interface via a pipeline.

8. The roller press without roller gap according to claim 7, characterized in that: The hydraulic system (9) further comprises a hydraulic station (92), the oil outlet and oil return port of the hydraulic station (92) being connected to the hydraulic valve group (91) via pipelines respectively.

9. The roller press without roller gap according to claim 7, characterized in that: The hydraulic valve group (91) is connected to a pressure gauge and a sensor (93) via pipelines.

10. The roller press without roller gap according to claim 7, characterized in that: The hydraulic valve group (91) is connected to an accumulator group (94) via a pipeline.

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