Loose material quick briquetting device and quick briquetting method

Abstract

The application discloses a loose material quick briquetting device and a quick briquetting method, relates to the briquetting and packing technical field, and solves the problem of low working efficiency of the existing briquetting machine, improves the reciprocating speed of the briquetting, and specifically has the following arrangement: a first hydraulic cylinder and two second hydraulic cylinders are arranged to drive a pressing head, the two second hydraulic cylinders are oppositely arranged at the two sides of the first hydraulic cylinder, a hydraulic system is further arranged on the machine body, the hydraulic system comprises a hydraulic oil tank, a liquid filling valve and a plurality of low-pressure constant-displacement oil pumps and high-pressure variable-displacement oil pumps driven by motors, the rodless cavities of the first hydraulic cylinder and the second hydraulic cylinders are connected with all the oil pumps of the hydraulic system through a hydraulic valve group, the rodless cavities of the first hydraulic cylinder or the second hydraulic cylinders are connected with the oil tank through the liquid filling valve, and the rod cavities of the first hydraulic cylinder or the second hydraulic cylinders are connected with all the oil pumps of the hydraulic system through the hydraulic valve group.

Description

Technical Field

[0001] This invention relates to the field of briquetting and packaging technology, and in particular to a rapid briquetting device and method for loose materials. Background Technology

[0002] When processing loose materials such as straw, wheat straw, leaves, wood shavings, bark, shredded straw, waste cardboard boxes, and beverage bottles, briquetting machines are generally used to compress them into blocks. Hydraulic systems are often employed. The briquetting machine is equipped with a pusher cylinder that pushes the material falling from the filling inlet into the compression chamber. Because the outlet size is smaller than the hopper size, the material is compressed. As more material is continuously pushed into the compression chamber, it is compacted. At this point, the compressed, square-shaped blocks are bundled to maintain their shape after exiting the chamber. As more material is continuously pressed into the compression chamber, the previously formed blocks are gradually pushed out, completing the production of one block.

[0003] In existing loose material briquetting machines, the compression and ejection of materials generally adopt a single hydraulic cylinder structure. Since compression requires large pressure and a large stroke, the diameter and length of the hydraulic cylinder are generally large. The hydraulic cylinder is supplied with pressurized oil by a hydraulic oil pump. Due to the limitation of the oil supply of the oil pump, the time for the cylinder to complete one extension and retraction action is relatively long. Consequently, the working efficiency of the briquetting machine is low. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a rapid briquetting device and method for loose materials. The briquetting head is driven by three hydraulic cylinders and equipped with several oil pumps, which can provide sufficient oil for the extension and retraction of the hydraulic cylinders. The hydraulic cylinders move quickly and can ensure sufficient pressure of the briquetting head, thus solving the problem of low working efficiency of existing briquetting machines.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, the present invention provides a rapid briquetting device for loose materials, comprising a horizontally placed body, a storage hopper located in the middle of the body, a feed hopper connected above the storage hopper, openings on both sides of the storage hopper, a pressing head located on one side of the storage hopper, and a compression chamber connected to the other side. The pressing head is driven by a first hydraulic cylinder and two second hydraulic cylinders, the two second hydraulic cylinders being arranged opposite each other on both sides of the first hydraulic cylinder. A hydraulic system is also installed on the body, the hydraulic system comprising a hydraulic oil tank, a filling valve, and several low-pressure quantitative oil pumps and high-pressure variable oil pumps driven by motors. The rodless chambers of the first and second hydraulic cylinders are connected to all the oil pumps of the hydraulic system through hydraulic valve groups. The rodless chamber of the first or second hydraulic cylinder is connected to the oil tank through the filling valve, and the rod chamber of the first or second hydraulic cylinder is connected to all the oil pumps of the hydraulic system through hydraulic valve groups.

[0007] As a further implementation, the first hydraulic cylinder and the second hydraulic cylinder are horizontally installed inside the machine body, and the centers of the connection points of the first hydraulic cylinder, the second hydraulic cylinder and the pressure head are on a straight line.

[0008] As a further implementation, the machine body is welded together from a first gantry, a second gantry, a machine body top cover, two machine body side plates, and a machine body bottom plate, and the machine body is hinged to the side wall and top cover of the compression chamber.

[0009] As a further implementation, the compression chamber consists of a compression chamber side wall and a compression chamber top cover. One end of the compression chamber side wall and the compression chamber top cover are hinged to the machine body, and the other end is connected to the clamping cylinder on the first gantry to adjust the opening size of the compression chamber. The clamping bolt on the second gantry is pressed against the middle part of the compression chamber.

[0010] As a further implementation, a first limit switch and a second limit switch are fixedly installed on the outside of the machine body, and a limit switch plate that cooperates with the limit switch is installed on the pressure head, so as to control the start and stop of the reciprocating motion of the pressure head and the stroke positioning through the cooperation of the limit switch plate with the first limit switch and the second limit switch.

[0011] As a further implementation, there are two motors, each motor driving a set of oil pumps, and each set of oil pumps consists of two low-pressure fixed-displacement oil pumps and one high-pressure variable-displacement oil pump.

[0012] As a further implementation, all oil pumps are connected to the rodless chamber of the first hydraulic cylinder, the rod chamber and the rodless chamber of the second hydraulic cylinder through hydraulic valve groups. The rod chamber of the first hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the second hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

[0013] As a further implementation, all oil pumps are connected to the rodless and rod chambers of the first hydraulic cylinder and the rodless chamber of the second hydraulic cylinder through hydraulic valve groups. The rod chamber of the second hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the second hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

[0014] As a further implementation, all oil pumps are connected to the rodless chamber of the first hydraulic cylinder, the rod chamber of the second hydraulic cylinder, and the rodless chamber of the first hydraulic cylinder through hydraulic valve groups. The rod chamber of the first hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the first hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

[0015] Secondly, the present invention provides a rapid briquetting method, as follows:

[0016] When compression begins, all oil pumps supply oil to the rodless chamber of the first or second hydraulic cylinder, and at the same time the filling valve opens and supplies oil to the corresponding rodless chamber of the second or first hydraulic cylinder, causing the pressure head to advance rapidly.

[0017] After reaching the first set pressure, some low-pressure oil pumps are unloaded, and the operating speed of the pressure head decreases.

[0018] After reaching the second set pressure, all low-pressure oil pumps are unloaded, and the filling valve is closed. The two high-pressure oil pumps supply oil to the rodless chambers of all first and second hydraulic cylinders simultaneously. The pressure head runs at the slowest speed and the pressure is the highest.

[0019] After the pressure head reaches the set end position, it touches the first limit switch, the hydraulic system stops supplying oil to the rodless chambers of the first hydraulic cylinder and the second hydraulic cylinder, and the pressure head stops moving forward;

[0020] When the pressure head retracts, all oil pumps supply oil to the rod chambers of the first hydraulic cylinder or the two second hydraulic cylinders to drive the pressure head to retract rapidly to the set initial position and trigger the second limit switch. The hydraulic system stops supplying oil, the pressure head stops retracting, and the cycle begins.

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

[0022] (1) The pressure head of the present invention is driven by three hydraulic cylinders and equipped with several oil pumps, which can provide sufficient oil for the extension and retraction of the hydraulic cylinders. The hydraulic cylinders move quickly and can ensure sufficient pressure of the pressure head. With the coordinated operation of the low-pressure oil pump and high-pressure variable oil pump in the hydraulic system, the demand for high power and quantity of motors is reduced, and the cost of use is reduced.

[0023] (2) One end of the compression chamber of the present invention is hinged to the machine body, and the other end is driven by a clamping cylinder, so that the size of the opening of the compression chamber can be adjusted according to the needs, which greatly improves its adaptability. In addition, the middle position of the compression chamber is clamped and fixed by clamping bolts, which avoids the deformation of the compression chamber during the pressing process.

[0024] (3) Since the initial pressure is low and the later pressure is high during the briquetting process, all oil pumps are used to drive the designated hydraulic cylinders when compression begins, which makes the hydraulic cylinders extend and retract quickly, greatly improving the movement speed of the press head. Since the motor power is fixed, in order to ensure sufficient pressure in the later stage, the use of low-pressure oil pumps is gradually eliminated, and finally only high-pressure variable oil pumps are used to drive the hydraulic cylinders. Since the output flow of high-pressure variable oil pumps is small when the pressure is high, the requirements for motor power and quantity are reduced while meeting the pressure requirements. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a rapid briquetting device for loose materials according to one or more embodiments of the present invention;

[0027] Figure 2 This is a front view structural schematic diagram of a rapid briquetting device for loose materials according to one or more embodiments of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the body according to one or more embodiments of the present invention;

[0029] Figure 4 yes Figure 2 A schematic diagram of the AA cross-sectional structure shown.

[0030] Figure 5 yes Figure 4 A schematic diagram of the C-direction structure shown;

[0031] Figure 6 yes Figure 4 A schematic diagram of the BB cross-section structure shown (initial position of the indenter);

[0032] Figure 7 yes Figure 4 A schematic diagram of the BB cross-sectional structure shown (the termination position of the indenter);

[0033] Figure 8 This is a schematic diagram of the pressure head according to one or more embodiments of the present invention;

[0034] Figure 9 yes Figure 8 A schematic diagram of the structure along direction D shown;

[0035] Figure 10 This is a schematic diagram of a first hydraulic system according to one or more embodiments of the present invention;

[0036] Figure 11 This is a schematic diagram of a second hydraulic system according to one or more embodiments of the present invention;

[0037] Figure 12 This is a schematic diagram of a third hydraulic system according to one or more embodiments of the present invention;

[0038] In the diagram: the spacing or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only.

[0039] The components include: 1. Machine body; 2. Feed hopper; 3. Press head; 4. First limit switch; 5. Second limit switch; 6. Hydraulic oil tank; 7. Hydraulic valve block; 8. First hydraulic cylinder; 9. Second hydraulic cylinder; 10. Clamping bolt; 11. Clamping cylinder; 12. First gantry frame; 13. Compression chamber side wall; 14. Second gantry frame; 15. Compression chamber top cover; 16. Hinge pin; 17. Machine body top cover plate; 18. Machine body side plate; 19. Machine body bottom plate; 20. Cylinder mounting plate; 21. Storage bin; 22. Compression chamber; 23. Filling valve; 24. Limit switch pressure plate; 25. Motor; 26. First low-pressure quantitative oil pump; 27. Second low-pressure quantitative oil pump; 28. Third low-pressure quantitative oil pump; 29. ​​Fourth low-pressure quantitative oil pump; 30. First high-pressure variable oil pump; 31. Second high-pressure variable oil pump. Detailed Implementation

[0040] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] As described in the background section, existing bulk material briquetting machines generally employ a single hydraulic cylinder structure for compressing and extending the material. Since compression requires significant pressure and a long stroke, the diameter and length of the hydraulic cylinder are generally large. The hydraulic cylinder is supplied with pressurized oil by a hydraulic pump. Therefore, due to the limited displacement of the pump, the cylinder takes a long time to complete one extension and retraction cycle, resulting in low working efficiency of the briquetting machine. To solve the above technical problems, this invention proposes a rapid briquetting device and method for bulk materials.

[0042] Example 1

[0043] In a typical embodiment of the present invention, such as Figures 1-12 As shown, a rapid briquetting device for loose materials is proposed, including a machine body 1, which is placed horizontally. A storage bin 21 is provided in the middle of the machine body 1, and a feeding hopper 2 is provided above the storage bin 21. The feeding hopper 2 is fixedly installed on the machine body 1 and communicates with the interior of the storage bin 21.

[0044] The storage bin 21 has openings on both sides. One side of the storage bin 21 is equipped with a pressure head 3 that can move back and forth. The other side of the storage bin 21 is equipped with a compression bin 22. That is, the compression bin 22 and the pressure head 3 are arranged opposite to each other on both sides of the storage bin 21.

[0045] A first hydraulic cylinder 8 and two second hydraulic cylinders 9 are connected to the side of the press head 3 away from the storage bin 21. The first hydraulic cylinder 8 is located in the middle position, and the two second hydraulic cylinders 9 are arranged opposite each other on both sides of the first hydraulic cylinder 8. A cylinder mounting plate 20 is fixedly installed on the machine body 1. The cylinder bodies of the first hydraulic cylinder 8 and the second hydraulic cylinders 9 are fixedly installed on the cylinder mounting plate 20. The ends of the telescopic rods of the first hydraulic cylinder 8 and the second hydraulic cylinders 9 are hinged together with the press head 3 to drive the reciprocating movement of the press head 3.

[0046] A hydraulic system is also fixedly installed on the body 1. The first hydraulic cylinder 8 and the second hydraulic cylinder 9 are both connected to the hydraulic system so as to drive the first hydraulic cylinder 8 and the second hydraulic cylinder 9 through the hydraulic system. The hydraulic system contains a hydraulic valve group consisting of a hydraulic oil tank 6 and a hydraulic valve block 7.

[0047] The compression chamber 22 consists of a compression chamber side wall 13 and a compression chamber top cover 15. One end of the compression chamber side wall 13 and the compression chamber top cover 15 are hinged to the machine body 1 through a hinge pin 16, and the other end is hinged to the clamping cylinder 11 on the first gantry 12. The opening size of the compression chamber 22 is adjusted by adjusting the pressure of the clamping cylinder 11. A second gantry 14 is also provided on the outer side of the middle part of the compression chamber 22. Several clamping bolts 10 are provided on the second gantry 14. The clamping bolts 10 on the second gantry 14 are used to assist in clamping and adjusting the middle part of the compression chamber 22.

[0048] It is understandable that the compression chamber side wall 13 and the compression chamber top cover 15 are both movable plate structures. The compression chamber side wall 13 and the compression chamber top cover 15 are set inside the body 1, and the bottom plate of the compression chamber 22 can be made using the bottom plate of the body 1.

[0049] like Figure 3 As shown, the fuselage 1 is a horizontally arranged long rectangular hollow frame structure, which is welded together by a first gantry 12, a second gantry 14, a fuselage top cover 17, two fuselage side plates 18 and a fuselage bottom plate 19.

[0050] The first gantry 12 is larger than the second gantry 14. The first gantry 12 is located at one end of the machine body 1 and is used for the contraction adjustment of the opening of the compression chamber 22. The other end of the machine body 1 is fixedly installed with a cylinder mounting plate 20 by welding for the installation of the first hydraulic cylinder 8 and the second hydraulic cylinder 9.

[0051] like Figures 4-5 As shown, the first hydraulic cylinder 8 and the second hydraulic cylinder 9 are horizontally installed inside the machine body 1. The piston rods of the first hydraulic cylinder 8 and the second hydraulic cylinder 9 are both connected to the pressure head 3. The pressure head 3 can reciprocate left and right in the storage bin 21 under the drive of the first hydraulic cylinder 8 and the second hydraulic cylinder 9.

[0052] A first limit switch 4 and a second limit switch 5 are fixedly installed on the outside of the machine body 1. The first limit switch 4 is adjacent to the storage bin 21, and the second limit switch 5 is adjacent to the cylinder mounting plate 20, that is, the second limit switch 5 is adjacent to one end of the machine body 1.

[0053] The pressure head 3 is a welded steel plate structure. The center of the connection point between the first hydraulic cylinder 8, the second hydraulic cylinder 9 and the pressure head 3 is on a straight line. One of the connection points is located in the middle of the pressure plate of the pressure head, and the other two are symmetrically arranged on both sides. The cylinder rod is connected to the pressure head through a pin. A limit switch plate 24 is welded to the upper part of one side of the pressure head. When the pressure head reaches the set position, the limit switch plate 24 can push the first limit switch 4 or the second limit switch 5. During the movement of the pressure head 3, the start and stop control of the reciprocating motion of the pressure head 3 and the stroke positioning can be realized by the cooperation of the limit switch plate 24 with the first limit switch 4 and the second limit switch 5.

[0054] It is understandable that the specific positions of the first limit switch 4, the second limit switch 5, and the limit switch plate 24 need to be determined according to the actual design requirements, and no further restrictions will be imposed here.

[0055] like Figures 6-7 As shown, in the initial state, the pressure head 3 is located on the right side of the storage bin 21. When the material enters the storage bin 21 from the feed hopper 2, the pressure head 3, driven by the first hydraulic cylinder 8 and the second hydraulic cylinder 9, moves to the left, pushing the material to the left and compressing the material in the storage bin 21 into the compression chamber 22. Because the outlet becomes smaller under the action of the clamping cylinder 11, the material is stuck, and the subsequent material will compress the material in front. When the pressure head 3 moves to the right as shown... Figure 7 After the set position is shown, touch the first limit switch 4, the pressure head 3 stops moving forward and retracts. When it retracts to the starting position, touch the second limit switch 5, the pressure head 3 stops retracting and enters the next compression cycle. After several compressions, the material is compacted in the compression chamber. After compaction, the compressed block is bundled. As subsequent materials are continuously pressed into the compression chamber, the previously formed compressed blocks are gradually pushed out of the compression chamber, completing the production of one compressed block.

[0056] The hydraulic system consists of oil pipes, a hydraulic oil tank 6, a filling valve 23, a motor 25, a first low-pressure fixed-displacement oil pump 26, a second low-pressure fixed-displacement oil pump 27, a third low-pressure fixed-displacement oil pump 28, a fourth low-pressure fixed-displacement oil pump 29, a first high-pressure variable-displacement oil pump 30, and a second high-pressure variable-displacement oil pump 31. The first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable-displacement oil pump 30, and the second high-pressure variable-displacement oil pump 31 are all driven by the motor 25 to pump the oil in the hydraulic oil tank 6 into the first hydraulic cylinder 8 and the second hydraulic cylinder 9.

[0057] There are two motors 25, which drive two sets of oil pumps respectively. Each set of oil pumps consists of two low-pressure oil pumps and one high-pressure variable oil pump. Specifically, one motor 25 drives the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27 and the first high-pressure variable oil pump 30, while the other motor 25 drives the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29 and the second high-pressure variable oil pump 31.

[0058] The filling valve 23 is a suction and discharge valve between the hydraulic cylinder and the oil tank. It is a hydraulically controlled one-way valve. When filling, the filling valve 23 is opened to draw oil from the oil tank into the oil cylinder. When pressurizing, the filling valve 23 is closed to prevent oil from flowing back from the oil cylinder to the oil tank. When reversing, the filling valve 23 is opened to discharge the oil back to the oil tank. The filling valve 23 can quickly replenish oil to the oil cylinder of a large press, shorten the time required for the fast stroke, and improve efficiency.

[0059] The rodless chambers of the first hydraulic cylinder 8 and the second hydraulic cylinder 9 are connected to all the oil pumps of the hydraulic system through oil pipes. The rodless chamber of the first hydraulic cylinder 8 or the second hydraulic cylinder 9 is connected to the hydraulic oil tank 6 through the filling valve 23. The rod chamber of the first hydraulic cylinder 8 or the second hydraulic cylinder 9 is connected to all the oil pumps of the hydraulic system.

[0060] This embodiment provides three connection methods, as detailed below:

[0061] The first type is as follows Figure 10 As shown, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all connected to the rodless chamber of the first hydraulic cylinder 8, the rod chamber and the rodless chamber of the second hydraulic cylinder 9. The rod chamber of the first hydraulic cylinder 8 is directly connected to the hydraulic oil tank 6, and the rodless chamber of the second hydraulic cylinder 9 is also connected to the hydraulic oil tank 6 through the filling valve 23.

[0062] The second type is as follows Figure 11 As shown, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all connected to the rodless chamber and the rod chamber of the first hydraulic cylinder 8 and the rodless chamber of the second hydraulic cylinder 9. The rod chamber of the second hydraulic cylinder 9 is directly connected to the hydraulic oil tank 6, and the rodless chamber of the second hydraulic cylinder 9 is also connected to the hydraulic oil tank 6 through the filling valve 23.

[0063] The third type is as follows Figure 12As shown, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all connected to the rodless chamber of the first hydraulic cylinder 8, the rod chamber and the rodless chamber of the second hydraulic cylinder 9. The rod chamber of the first hydraulic cylinder 8 is directly connected to the hydraulic oil tank 6, and the rodless chamber of the first hydraulic cylinder 8 is also connected to the hydraulic oil tank 6 through the filling valve 23.

[0064] Example 2

[0065] In a typical embodiment of the present invention, a rapid briquetting method is proposed, utilizing the rapid briquetting device for loose materials described in Example 1, as follows:

[0066] After motor 25 starts, all oil pumps are unloaded and the system has no pressure.

[0067] At the start of compression, the oil pump only supplies oil to the first hydraulic cylinder 8 or the second hydraulic cylinder 9 in order to obtain a high extension speed. For hydraulic cylinders that are not supplied with oil by the oil pump, the filling valve 23 is used to directly supply oil to the rodless chamber, which can quickly fill the rodless chamber of the cylinder with hydraulic oil. At this time, the cylinder does not generate thrust. After the filling valve 23 is closed, the cylinder will generate thrust when the oil pump supplies oil to it.

[0068] Therefore, when compression begins, the material is loose and the pressure required by the pressure head 3 is small. As a result, all oil pumps supply oil to the rodless chamber of the first hydraulic cylinder 8 or the second hydraulic cylinder 9. At the same time, the filling valve 23 opens and supplies oil to the rodless chamber of the second hydraulic cylinder 9 or the first hydraulic cylinder 8 corresponding to the filling valve 23. At this time, the hydraulic system has a large flow rate and low pressure, and the pressure head 3 advances rapidly.

[0069] Compared to driving three hydraulic cylinders simultaneously, all oil pumps driving a single or two hydraulic cylinders result in a faster cylinder extension speed, which can meet the need for the pressure head 3 to advance rapidly. Understandably, the specific driving method for the first hydraulic cylinder 8 or the second hydraulic cylinder 9 needs to be determined based on actual requirements.

[0070] Since the power of motor 25 is fixed, the more oil pumps it drives, the lower the oil pump pressure. If one fixed-displacement oil pump is removed while the power of motor 25 remains unchanged, the output pressure of the oil pump will increase accordingly. After removing two fixed-displacement oil pumps, motor 25 is left with only one load, the high-pressure variable oil pump, which has a higher output pressure. The variable pump will also automatically reduce the flow rate and increase the pressure as the pressure increases, so the pressure head 3 will obtain a greater pressure.

[0071] Therefore, after reaching the first set pressure, some of the fixed-displacement pumps (low-pressure pumps) are unloaded. At this time, the system pressure increases and the running speed of the pressure head 3 decreases. After reaching the second set pressure, all fixed-displacement pumps are unloaded, leaving only two variable-displacement pumps (high-pressure pumps) to work. At the same time, the filling valve 23 is closed (this is because when the fixed-displacement pumps are not used, the pressure required by the pressure head 3 is already high. At this time, the first hydraulic cylinder 8 and the second hydraulic cylinder 9 need to work together to push the pressure head 3 forward. That is, the rodless chambers of the three cylinders are filled with high-pressure oil. If the filling valve 23 is not closed, the high-pressure oil will flow back to the oil tank). The two variable-displacement pumps supply oil to the rodless chambers of the three cylinders (i.e., the first hydraulic cylinder 8 and the second hydraulic cylinder 9) at the same time. At this time, the system pressure is the highest, the pressure of the pressure head 3 is the greatest, and the running speed is the slowest.

[0072] After the pressure head 3 reaches the set end position, it touches the set first limit switch 4, and the hydraulic system stops supplying oil to the rodless chamber of the first hydraulic cylinder 8 and the second hydraulic cylinder 9, and the pressure head 3 stops moving forward;

[0073] When the pressure head 3 retracts, all oil pumps operate, supplying oil to the rod chamber of the first hydraulic cylinder 8 or the two second hydraulic cylinders 9. The first hydraulic cylinder 8 or the two second hydraulic cylinders 9 drive the pressure head 3 to retract rapidly. After the pressure head 3 reaches the set initial position, it touches the set second limit switch 5, and the hydraulic system stops supplying oil to the rod chamber of the first hydraulic cylinder 8 or the two second hydraulic cylinders 9. The pressure head 3 stops retracting and enters the next cycle.

[0074] For ease of understanding, this embodiment describes in detail three connection methods with the hydraulic system, specifically:

[0075] In the first connection method with the hydraulic system, after the motor 25 starts, the hydraulic oil pumped out by all the oil pumps flows directly back to the hydraulic oil tank 6. The first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all in an unloaded state, and the system has no pressure.

[0076] At the start of compression, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 jointly supply oil to the rodless chamber of the first hydraulic cylinder 8. Simultaneously, the filling valve 23 opens, supplying oil to the rodless chambers of the second hydraulic cylinders 9 on both sides. At this time, the pressure head 3 advances rapidly. After reaching the first set pressure, the first low-pressure fixed-displacement oil pump 26 and the fourth low-pressure fixed-displacement oil pump 29 are unloaded, the system pressure increases, the pressure of the pressure head 3 increases, and the movement speed slightly decreases. After the pressure is reduced and reaches the second set pressure, the second low-pressure quantitative oil pump 27 and the third low-pressure quantitative oil pump 28 are unloaded, and the filling valve 23 is closed. At this time, the first high-pressure variable oil pump 30 and the second high-pressure variable oil pump 31 simultaneously supply oil to the rodless chamber of the first hydraulic cylinder 8 and the second hydraulic cylinder 9. At this time, the pressure of the pressure head 3 is the largest and the running speed is the slowest. After the pressure head 3 reaches the set end position, it touches the set first limit switch 4, and the hydraulic system stops supplying oil to the first hydraulic cylinder 8 and the second hydraulic cylinder 9. The pressure head 3 stops moving forward and enters the retraction working state.

[0077] When the pressure head retracts, all pumps supply oil to the rod chambers of the two second hydraulic cylinders 9. At the same time, the filling valve 23 opens, and the hydraulic oil in the rodless chamber of the second hydraulic cylinder 9 flows back to the hydraulic oil tank 6. The two second hydraulic cylinders 9 drive the pressure head 3 to retract quickly. After the pressure head 3 reaches the set initial position, it touches the set second limit switch 5, the hydraulic system stops supplying oil to the second hydraulic cylinder 9, the pressure head 3 stops retracting, and enters a cycle.

[0078] In the second connection method with the hydraulic system, after the motor 25 starts, the hydraulic oil pumped out by all the oil pumps flows directly back to the hydraulic oil tank 6. The first low-pressure fixed oil pump 26, the second low-pressure fixed oil pump 27, the third low-pressure fixed oil pump 28, the fourth low-pressure fixed oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all in an unloaded state, and the system has no pressure.

[0079] At the start of compression, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable-displacement oil pump 30, and the second high-pressure variable-displacement oil pump 31 jointly supply oil to the rodless chamber of the first hydraulic cylinder 8. Simultaneously, the filling valve 23 opens, supplying oil to the rodless chambers of the second hydraulic cylinders 9 on both sides. At this time, the pressure head 3 advances rapidly. After reaching the first set pressure, the first low-pressure fixed-displacement oil pump 26 and the fourth low-pressure fixed-displacement oil pump 29 are unloaded, the system pressure increases, the pressure of the pressure head 3 increases, and the movement speed slightly decreases. After a slight decrease in pressure, once the second set pressure is reached, the second low-pressure quantitative oil pump 27 and the third low-pressure quantitative oil pump 28 are unloaded, and the filling valve 23 is closed. At this time, the first high-pressure variable oil pump 30 and the second high-pressure variable oil pump 31 simultaneously supply oil to the rodless chambers of the first hydraulic cylinder 8 and the second hydraulic cylinder 9. At this time, the pressure of the pressure head 3 is at its maximum and the running speed is at its slowest. After the pressure head reaches the set termination position, it touches the set first limit switch 4, and the hydraulic system stops supplying oil to the first hydraulic cylinder 8 and the second hydraulic cylinder 9. The pressure head 3 stops moving forward and enters the retraction working state.

[0080] When the pressure head 3 retracts, all pumps supply oil to the first hydraulic cylinder 8 in the middle. At the same time, the filling valve 23 opens, and the hydraulic oil in the rodless chamber of the second hydraulic cylinder 9 flows back to the hydraulic oil tank 6. The first hydraulic cylinder 8 drives the pressure head 3 to retract quickly. After the pressure head 3 reaches the set initial position, it touches the set second limit switch 5, and the hydraulic system stops supplying oil to the first hydraulic cylinder 8. The pressure head 3 stops retracting and enters a cycle.

[0081] In the third connection method with the hydraulic system, after the motor 25 starts, all the hydraulic oil from the oil pumps flows directly back to the hydraulic oil tank 6. The first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 are all in an unloaded state, and the system has no pressure.

[0082] At the start of compression, the first low-pressure fixed-displacement oil pump 26, the second low-pressure fixed-displacement oil pump 27, the third low-pressure fixed-displacement oil pump 28, the fourth low-pressure fixed-displacement oil pump 29, the first high-pressure variable oil pump 30, and the second high-pressure variable oil pump 31 jointly supply oil to the rodless chamber of the second hydraulic cylinder 9. Simultaneously, the filling valve 23 opens, supplying oil to the rodless chamber of the first hydraulic cylinder 8. At this time, the pressure head 3 advances rapidly. After reaching the first set pressure, the first low-pressure fixed-displacement oil pump 26 and the fourth low-pressure fixed-displacement oil pump 29 are unloaded, the system pressure increases, the pressure on the pressure head 3 increases, and the movement speed... After the pressure is slightly reduced and the second set pressure is reached, the second low-pressure quantitative oil pump 27 and the third low-pressure quantitative oil pump 28 are unloaded, and the filling valve 23 is closed. At this time, the first high-pressure variable oil pump 30 and the second high-pressure variable oil pump 31 simultaneously supply oil to the rodless chamber of the first hydraulic cylinder 8 and the second hydraulic cylinder 9. At this time, the pressure of the pressure head 3 is the largest and the running speed is the slowest. When the pressure head reaches the set end position, it touches the set first limit switch 4, the hydraulic system stops supplying oil to the hydraulic cylinder, the pressure head 3 stops moving forward and enters the retraction working state.

[0083] When the pressure head 3 retracts, all pumps supply oil to the rod chamber of the second hydraulic cylinder 9. At the same time, the filling valve 23 opens, and the hydraulic oil in the rodless chamber of the first hydraulic cylinder 8 flows back to the hydraulic oil tank 6. The second hydraulic cylinder 9 drives the pressure head 3 to retract quickly. After the pressure head 3 reaches the set initial position, it touches the set second limit switch 5, and the hydraulic system stops supplying oil to the second hydraulic cylinder 9. The pressure head 3 stops retracting and enters a cycle.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for rapidly briquetting loose materials, utilizing a rapid briquetting device for loose materials, characterized in that: A rapid briquetting device for loose materials includes a horizontally placed body with a storage bin in the middle and a feed hopper connected above it. The storage bin has openings on both sides, a pressure head on one side, and a compression chamber on the other side. The pressure head is driven by a first hydraulic cylinder and two second hydraulic cylinders. The two second hydraulic cylinders are arranged opposite each other on both sides of the first hydraulic cylinder. The body is also equipped with a hydraulic system, which includes a hydraulic oil tank, a filling valve, and several low-pressure fixed-displacement oil pumps and high-pressure variable-displacement oil pumps driven by motors. The rodless chambers of the first and second hydraulic cylinders are connected to all the oil pumps of the hydraulic system through hydraulic valve groups. The rodless chamber of the first or second hydraulic cylinder is connected to the oil tank through the filling valve, and the rod chamber of the first or second hydraulic cylinder is connected to all the oil pumps of the hydraulic system through hydraulic valve groups. The outer side of the machine body is fixedly installed with a first limit switch and a second limit switch. The pressure head is equipped with a limit switch plate that cooperates with the limit switch, so as to control the start and stop of the reciprocating motion of the pressure head and the stroke positioning through the cooperation of the limit switch plate with the first limit switch and the second limit switch. The motor is provided in two parts, each motor drives a set of oil pumps, and each set of oil pumps consists of two low-pressure fixed oil pumps and one high-pressure variable oil pump. The specific method is as follows: When compression begins, all oil pumps supply oil to the rodless chamber of the first or second hydraulic cylinder, and at the same time the filling valve opens and supplies oil to the corresponding rodless chamber of the second or first hydraulic cylinder, causing the pressure head to advance rapidly. After reaching the first set pressure, some low-pressure oil pumps are unloaded, and the operating speed of the pressure head decreases. After reaching the second set pressure, all low-pressure oil pumps are unloaded, and the filling valve is closed. The two high-pressure oil pumps supply oil to the rodless chambers of all first and second hydraulic cylinders simultaneously. The pressure head runs at the slowest speed and the pressure is the highest. After the pressure head reaches the set end position, it touches the first limit switch, the hydraulic system stops supplying oil to the rodless chambers of the first hydraulic cylinder and the second hydraulic cylinder, and the pressure head stops moving forward; When the pressure head retracts, all oil pumps supply oil to the rod chambers of the first hydraulic cylinder or the two second hydraulic cylinders to drive the pressure head to retract rapidly to the set initial position and trigger the second limit switch. The hydraulic system stops supplying oil, the pressure head stops retracting, and the cycle begins.

2. The method for rapidly briquetting loose materials according to claim 1, characterized in that, The first hydraulic cylinder and the second hydraulic cylinder are horizontally installed inside the machine body, and the centers of the connection points of the first hydraulic cylinder, the second hydraulic cylinder and the pressure head are on a straight line.

3. The method for rapidly briquetting loose materials according to claim 1, characterized in that, The machine body is welded together from a first gantry frame, a second gantry frame, a machine body top cover plate, two machine body side plates, and a machine body bottom plate. The machine body is hinged to the side walls and top cover of the compression chamber.

4. The method for rapidly briquetting loose materials according to claim 3, characterized in that, The compression chamber consists of a compression chamber side wall and a compression chamber top cover. One end of the compression chamber side wall and the compression chamber top cover are hinged to the machine body, and the other end is connected to the clamping cylinder on the first gantry to adjust the opening size of the compression chamber. The clamping bolt on the second gantry is pressed against the middle part of the compression chamber.

5. The method for rapidly briquetting loose materials according to claim 1, characterized in that, All oil pumps are connected to the rodless chamber of the first hydraulic cylinder, the rod chamber and the rodless chamber of the second hydraulic cylinder. The rod chamber of the first hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the second hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

6. The method for rapidly briquetting loose materials according to claim 1, characterized in that, All oil pumps are connected to the rodless and rod chambers of the first hydraulic cylinder and the rodless chamber of the second hydraulic cylinder. The rod chamber of the second hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the second hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

7. The method for rapidly briquetting loose materials according to claim 1, characterized in that, All oil pumps are connected to the rodless chamber of the first hydraulic cylinder, the rod chamber and the rodless chamber of the second hydraulic cylinder. The rod chamber of the first hydraulic cylinder is directly connected to the hydraulic oil tank, and the rodless chamber of the first hydraulic cylinder is also connected to the hydraulic oil tank through a filling valve.

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