Roller press for lead zinc ore processing

Abstract

The invention relates to the field of lead-zinc ore processing, and discloses a roller press for lead-zinc ore processing, the roller press comprises a roller pressing box, supporting frames and pressing rollers, the two sides of the lower portion of the roller pressing box are supported by the supporting frames, a feeding hopper is installed in the middle of the upper portion of the roller pressing box, and a discharging groove is formed in the lower portion of the front face of the roller pressing box; a discharging frame is installed at the position, located on the edge of a discharging groove, of the front face of the roller pressing box, two sets of pressing rollers are arranged on the roller pressing box through a switching structure, when one set of pressing rollers are damaged after being used and need to be maintained or replaced, only the switching structure needs to be used, the damaged pressing rollers are switched to be rolled, maintenance or replacement work of the pressing rollers is facilitated, and the working efficiency is improved. And meanwhile, the other group of compression rollers can be driven to be switched into the rolling box, so that the rolling work of lead zinc ore can be continuously carried out in the rolling box in the process of maintaining the compression rollers, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of lead-zinc ore processing, in particular to a roller press for lead-zinc ore processing. Background Art

[0002] Lead-zinc ore refers to a mineral rich in the metal elements lead and zinc. Lead and zinc are widely used in the electrical industry, mechanical industry, military industry, metallurgical industry, chemical industry, light industry and pharmaceutical industry. In addition, lead metal is also widely used in the nuclear industry, petroleum industry and other sectors. When processing lead-zinc ore, a roller press is needed to carry out the roller pressing work. In the prior art roller press, the ends of the two adjustment plates away from the mounting plate can be brought closer to each other by rotating the adjustment bolts, and the ore inside the feed frame can slide along the side of the adjustment plate to the inside of the roller mill box. When in use, the staff can adjust the distance between the ends of the two adjustment plates away from the mounting plate, so as to adjust the conveying speed of the ore into the roller mill box, which can prevent too much ore from being conveyed into the roller mill box at one time, and the roller inside the roller mill box can better crush the ore when in use; However, when the existing roller press is used to roll the lead-zinc ore, when the rollers in the roller press need to be cleaned, or when the rollers of the roller press are damaged and need to be repaired or replaced, it is necessary to stop the rolling process of the lead-zinc ore in the roller press, which reduces the rolling work efficiency. Therefore, there is room for improvement. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a roller press for processing lead-zinc ore.

[0004] The present invention provides a roller press for lead-zinc ore processing, which adopts the following technical solution: A roller press for processing lead-zinc ore, comprising a roller press box, a support frame and a press roller, wherein the two sides of the roller press box are supported by the support frame, a feed hopper is installed in the middle of the upper part of the roller press box, a material discharge trough is provided at the lower part of the front of the roller press box, a material discharge frame is installed at the edge of the material discharge trough on the front of the roller press box, and two groups of press rollers are arranged on the roller press box through a switching structure; The switching structure includes a first groove opened at a position above the space on the left and right sides of the roller press box, a first through groove is opened on a groove wall on one side of the two first grooves close to each other, the first through groove is connected to the internal space of the roller press box, a switching seat passes through the first through groove, and two second through grooves are opened in the switching seat, and two first rotating rods are rotated and passed through the groove wall on the rear side of the second through groove, a gear is fixedly sleeved on the first rotating rod near the groove wall at the rear end of the second through groove, and each group of two gears are meshed and connected, a pressure roller is fixedly sleeved on the first rotating rod, and a A plug-in column, the outer diameter of which is 0.7 times the outer diameter of the first rotating rod, a plurality of plug-in holes are provided at equal angles on the circumference of the plug-in column, an opening structure is provided at the two second through grooves on the switching seat, a cross bar is connected at the two corners below the groove wall on one side of the first groove, a movable plate is movably sleeved on the cross bar, the switching seat is fixedly mounted on the movable plate, a cylinder is installed in the middle of the right side of the roller press box, one end of the cylinder output shaft is connected to a push-pull rod, one end of the push-pull rod is connected to one of the movable plates, and a driving structure is provided on the rear side of the roller press box.

[0005] Preferably, the flip-up structure includes a flip-up plate hinged on the groove wall on one side of the second through groove, a magnetic block is fixedly provided on the groove wall on one side of the flip-up plate, the magnetic block is adsorbed and fixed on the groove wall on the other side of the second through groove, a handle is installed on the edge of the side of the flip-up plate away from the feed hopper, and a supporting structure is provided on the flip-up plate.

[0006] Preferably, the supporting structure includes a second groove opened on the front side of the flip plate at the position of the first turning rod, a through groove is opened on the inner end groove wall of the second groove, the groove diameter of the second groove is 1.2 times the groove diameter of the through groove, two T-shaped rods are connected to the inner end groove wall of the second groove, a sleeve plate is movably sleeved on the T-shaped rod, a support rod is connected to the middle of the rear side surface of the sleeve plate, a support groove is opened on the front end face of the first turning rod, and an extrusion structure is arranged between the sleeve plate and the front groove wall of the first through groove.

[0007] Preferably, the extrusion structure includes a U-shaped seat installed in the middle of the front side of the sleeve plate, a roller is arranged in the U-shaped seat, a first spring is sleeved on the T-shaped rod, two ends of the first spring are respectively connected to the sub-sleeve plate and the inner end groove wall of the second groove, a fixing strip is fixedly embedded in the front groove wall of the first through groove, and the two end surfaces of the fixing strip are inclined surfaces.

[0008] Preferably, the driving structure includes a mounting plate fastened by bolts on the rear side of the roller press box near the switching seat position, a motor is fixedly mounted on the mounting plate, the motor output shaft is connected to a second rotating rod that rotates through the mounting plate, and a connecting structure is provided on the second rotating rod.

[0009] Preferably, the connecting structure includes a connecting tube movably sleeved on the second rotating rod, a square groove is opened on the inner end groove wall of the connecting tube, and a square block is installed on one end of the second rotating rod movably inserted into the square groove, and the side surface of the square block is fitted on the inner side groove wall of the square groove. Two plug-in rods are movably passed through the side surface of the connecting tube away from the position of the second rotating rod, and the two plug-in rods are distributed in the radial direction of the connecting tube, a pre-positioning structure is provided on one end of the plug-in rod inserted into the connecting tube, and a rotating plug-in structure is provided on the connecting tube, and the plug-in rod is movably inserted into the plug-in hole on the corresponding plug-in column.

[0010] Preferably, the rotating plug-in structure includes a bidirectional screw that rotates and passes through the connecting tube, the thread directions of the left and right ends of the bidirectional screw are opposite, rotating blocks are fixedly sleeved on both ends of the bidirectional screw, and moving strips are sleeved on the bidirectional screw near both ends, and the moving strip is provided with a thread groove for the bidirectional screw to pass through, and one end of the moving strip is fixedly sleeved on the plug-in rod.

[0011] Preferably, the pre-positioning structure includes an insertion rod movably inserted into one end of the plug-in rod, a predetermined block is provided on one end of the insertion rod, the predetermined block is hemispherical away from one end of the plug-in rod, a second spring is sleeved on the insertion rod, and both ends of the second spring are respectively connected to the predetermined block and the plug-in rod.

[0012] In summary, the present invention includes the following beneficial technical effects: The present invention is provided with a switching structure and two groups of pressing rollers. When one group of pressing rollers is damaged after use and needs to be repaired or replaced, it is only necessary to use the switching structure to switch the damaged pressing rollers to another roller pressing position, which not only facilitates the repair or replacement of the pressing rollers, but also drives the other group of pressing rollers to be switched to the roller pressing box. In this way, during the process of repairing the pressing rollers, the rolling work of the lead-zinc ore can continue in the roller pressing box, which greatly improves the work efficiency. The present invention is provided with an opening structure, and after the corresponding pressure roller is switched out of the roller pressing box, the opening plate on the opening structure can be directly opened, so as to better expose the pressure roller for maintenance, which greatly facilitates the maintenance work of the staff, and when the opening plate on the opening structure is inserted into the first through groove, the opening plate can be fixed on the switching seat by using one side of the opening plate to be close to the groove wall of the first through groove; The present invention is provided with a support structure and a squeezing structure, so that when the switching seat drives the corresponding pressing roller to move and switch to the roller pressing box, the squeezing structure can automatically drive the support rod on the support structure to be inserted into the support groove at the end of the first rotating rod in the pressing roller, so as to improve the stability of the pressing roller when rotating and rolling. When the switching seat takes out the corresponding pressing roller, it can also drive one end of the support rod to be automatically drawn out from the corresponding support groove, so as to facilitate the maintenance or replacement of the pressing roller. The present invention is provided with a driving structure, a connecting structure, a rotating plug-in structure and a pre-positioning structure. When the switching seat switches the corresponding pressing roller to the roller pressing box, the driving structure and the corresponding pressing roller can be connected through the connecting structure and the rotating plug-in structure. In this way, the two groups of pressing rollers can perform automatic rolling work under the action of the same driving structure, thereby reducing the manufacturing cost of the roller press. In addition, the setting of the pre-positioning structure can pre-position the rotating plug-in structure when connecting, which greatly facilitates the connection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a roller press for processing lead-zinc ore in an embodiment of the present invention; Figure 2 In the embodiment of the present invention Figure 1 A magnified view of the structure at A; Figure 3 1 is a schematic diagram of the structure of the rear side of the roller press box in an embodiment of the present invention; Figure 4 In the embodiment of the present invention Figure 3 A magnified view of the structure at B; Figure 5 This is a schematic diagram of the structure of the mounting plate in an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the connecting tube in an embodiment of the present invention; Figure 7 In the embodiment of the present invention Figure 6 Enlarged view of the structure at location C.

[0014] Description of the reference numerals: 1. roller press box; 2. support frame; 3. feed hopper; 4. feed chute; 5. feed frame; 6. first groove; 7. first through groove; 8. cross bar; 9. moving plate; 10. switching seat; 11. second through groove; 12. cylinder; 13. push-pull rod; 14. press roller; 15. first rotating rod; 16. plug-in column; 17. plug-in hole; 18. flip-up plate; 19. magnetic block; 20. handle; 21. through groove; 2 2. T-shaped rod; 23. sleeve plate; 24. support rod; 25. second groove; 26. first spring; 27. U-shaped seat; 28. roller; 29. ​​fixing bar; 30. mounting plate; 31. motor; 32. second rotating rod; 33. connecting tube; 34. square block; 35. square groove; 36. plug-in rod; 37. bidirectional screw; 38. rotating block; 39. moving bar; 40. plug-in rod; 41. predetermined block; 42. second spring. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1-Figure 7 The present invention is described in further detail.

[0016] The embodiment of the present invention discloses a roller press for processing lead-zinc ore, comprising a roller press box 1, a support frame 2 and a pressure roller 14, wherein the two sides of the roller press box 1 are supported by the support frame 2, a feed hopper 3 is installed in the middle of the roller press box 1, a material discharge trough 4 is provided at the lower part of the front of the roller press box 1, a material discharge frame 5 is installed at the edge of the material discharge trough 4 at the front of the roller press box 1, and two groups of pressure rollers 14 are arranged on the roller press box 1 through a switching structure; The switching structure includes a first groove 6 opened at the upper position of the space on the left and right sides of the roller press box 1, a first through groove 7 is opened on the groove wall on one side of the two first grooves 6 close to each other, the first through groove 7 is communicated with the internal space of the roller press box 1, a switching seat 10 passes through the first through groove 7, two second through grooves 11 are opened in the switching seat 10, two first rotating rods 15 are rotated through the groove wall on the rear side of the second through groove 11, a gear is fixedly sleeved on the first rotating rod 15 near the groove wall at the rear end of the second through groove 11, each group of two gears are meshed and connected, a pressure roller 14 is fixedly sleeved on the first rotating rod 15, a plug-in column 16 is connected to the rear end of the first rotating rod 15, the outer diameter of the plug-in column 16 is 0.7 times the outer diameter of the first rotating rod 15, a plurality of plug-in holes 17 are opened at equal angles on the circumference of the plug-in column 16, and the switching seat 10 is provided with flip-up holes at the two second through grooves 11 Structure, cross bars 8 are connected to the two corners below the groove wall on one side of the first groove 6, and a movable plate 9 is movably sleeved on the cross bar 8. A switching seat 10 is fixedly installed on the movable plate 9. A cylinder 12 is installed in the middle of the right side of the roller pressing box 1, and one end of the cylinder 12 output shaft is connected to a push-pull rod 13, and one end of the push-pull rod 13 is connected to one of the movable plates 9. A driving structure is provided on the rear side of the roller pressing box 1. When one group of rollers 14 in the switching seat 10 needs to be repaired and replaced, the cylinder 12 can be started, and the switching seat 10 can be driven to move in the roller pressing box 1 through the push-pull rod 13, and the corresponding roller 14 on the switching seat 10 is pulled out of the first through groove 7 for maintenance. At the same time, the switching seat 10 drives another group to move and switch to the first through groove 7. In this way, while repairing the corresponding roller 14, the roller press can continue to roll the lead-zinc ore, thereby improving work efficiency.

[0017] See also Figure 1-Figure 3The opening structure includes an opening plate 18 hinged on the groove wall on one side of the second through groove 11, and the opening plate 18 is in an "L" shape. A magnetic block 19 is fixedly arranged on the groove wall on one side of the opening plate 18, and the magnetic block 19 is adsorbed and fixed on the groove wall on the other side of the second through groove 11. A handle 20 is installed on the edge of the side of the opening plate 18 away from the feed hopper 3. A supporting structure is arranged on the opening plate 18. When the switching seat 10 takes out the corresponding pressure roller 14 from the roller press box 1, the handle 20 can be used to open the corresponding opening plate 18 from the switching seat 10, so as to better expose the corresponding pressure roller 14 and facilitate the maintenance and replacement of the pressure roller 14. When the switching seat 10 drives the opening plate 18 to be inserted into the first through groove 7, the opening plate 18 is tightly attached to the front groove wall of the first through groove 7, so that the opening plate 18 can be directly fixed to the switching seat 10, and no additional fastening structure is required to fix the opening plate 18 on the switching seat 10.

[0018] See Figure Figure 1 and Figure 2 The supporting structure includes a second groove 25 provided on the front of the flip plate 18 at the position of the first rotating rod 15, a through groove 21 is provided on the inner end groove wall of the second groove 25, the groove diameter of the second groove 25 is 1.2 times the groove diameter of the through groove 21, two T-shaped rods 22 are connected to the inner end groove wall of the second groove 25, a sleeve plate 23 is movably sleeved on the T-shaped rod 22, a support rod 24 is connected to the middle of the rear side surface of the sleeve plate 23, a support groove is provided on the front end surface of the first rotating rod 15, and an extrusion structure is provided between the sleeve plate 23 and the front groove wall of the first through groove 7; The extrusion structure includes a U-shaped seat 27 installed in the middle of the front face of the sleeve plate 23, a roller 28 is arranged in the U-shaped seat 27, a first spring 26 is sleeved on the T-shaped rod 22, and the two ends of the first spring 26 are respectively connected to the inner end groove wall of the sub-sleeve plate 23 and the second groove 25, a fixing bar 29 is fixedly embedded in the front groove wall of the first through groove 7, and the two end faces of the fixing bar 29 are inclined surfaces. In the process of the switching seat 10 driving the corresponding pressure roller 14 to move and switch to the first through groove 7, the corresponding roller 28 is driven to roll on the fixing bar 29, thereby pushing the sleeve plate 23 on the T-shaped rod 22 to drive the support rod 24 to move and insert into the support groove on the end face of the first rotating rod 15. Since the outer diameter of the support rod 24 is the same as the inner diameter of the support groove, the support rod 24 can serve as a supporting structure for the other end of the first rotating rod 15, thereby ensuring the stability of the pressure roller 14 when rotating.

[0019] See also Figure 1-Figure 7 The driving structure includes a mounting plate 30 fastened by bolts at the rear side of the roller press box 1 near the switching seat 10, a motor 31 is fixedly mounted on the mounting plate 30, an output shaft of the motor 31 is connected to a second rotating rod 32 that rotates and passes through the mounting plate 30, and a connecting structure is provided on the second rotating rod 32; The connection structure includes a connection tube 33 movably sleeved on the second rotating rod 32, a square groove 35 is opened on the inner end groove wall of the connection tube 33, and a square block 34 is installed on one end of the second rotating rod 32 that is movably inserted into the square groove 35, and the side of the square block 34 is attached to the inner groove wall of the square groove 35. Two plug rods 36 are movably passed through the side of the connection tube 33 away from the second rotating rod 32. The two plug rods 36 are distributed in the radial direction of the connection tube 33, and a pre-positioning structure is arranged on one end of the plug rod 36 inserted into the connection tube 33. A rotating plug structure is arranged on the connection tube 33, and the plug rod 36 is movably inserted into the plug hole 17 on the corresponding plug column 16; The rotating plug-in structure includes a bidirectional screw 37 that rotates through the connecting tube 33. The left and right ends of the bidirectional screw 37 have opposite thread directions. Both ends of the bidirectional screw 37 are fixedly sleeved with a rotating block 38. The bidirectional screw 37 is sleeved with a moving bar 39 near both ends. The moving bar 39 is provided with a thread groove for the bidirectional screw 37 to pass through. One end of the moving bar 39 is fixedly sleeved on the plug-in rod 36. The pre-positioning structure includes an insertion rod 40 that is movably inserted into one end of the plug rod 36, and a predetermined block 41 is provided on one end of the insertion rod 40. The predetermined block 41 is hemispherical at one end away from the plug rod 36. A second spring 42 is sleeved on the insertion rod 40, and the two ends of the second spring 42 are respectively connected to the predetermined block 41 and the plug rod 36. After the switching seat 10 drives the corresponding pressure roller 14 to move into the first through groove 7, the connecting tube 33 can be moved in the direction of the plug column 16 on the second rotating rod 32. The connecting tube 33 is sleeved on the plug column 16, and the connecting tube 33 is pressed against the end of the first rotating rod 15. The square block 34 at one end of the second rotating rod 32 is tightened to the inner end groove wall of the square groove 35. At this time, the connecting tube 33 is rotated, with The movable plug-in rod 36 and the plug-in rod 40 rotate as a whole. When the predetermined block 41 at one end of the plug-in rod 40 rotates to the plug-in hole 17 at the corresponding position on the plug-in column 16, under the elastic force of the second spring 42, the predetermined block 41 is pushed to be inserted into the plug-in hole 17, which plays a role in pre-positioning the connection work. Then the bidirectional screw 37 is rotated by the rotating block 38, and the two moving bars 39 synchronously drive the plug-in rod 36 to move toward the middle, thereby driving the plug-in rod 36 to move and insert into the plug-in hole 17 at the corresponding position, thereby realizing the connection work between the motor 31 and the corresponding pressure roller 14. In this way, the two groups of pressure rollers 14 can perform rotational rolling work under the drive of the same motor 31, thereby reducing the manufacturing cost of the roller press.

[0020] The implementation principle of a roller press for processing lead-zinc ore in an embodiment of the present invention is as follows: when the roller 14 in the roller press box 1 is damaged after long-term use and needs to be repaired and replaced, first, the motor 31 is turned off, and the bidirectional screw 37 is rotated by the rotating block 38. The two moving bars 39 synchronously drive the plug-in rod 36 to move in opposite directions on the bidirectional screw 37, and the plug-in rod 36 and part of the predetermined block 41 are pulled out from the plug-in hole 17 on the plug-in column 16. At this time, the connecting tube 33 is moved on the second rotating rod 32 toward the direction close to the motor 31 to connect the connecting rod 36. The connecting tube 33 is removed from the corresponding plug-in column 16, and then the cylinder 12 is started to drive the switching seat 10 to move in the roller pressing box 1 through the push-pull rod 13, and the corresponding pressure roller 14 on the switching seat 10 is pulled out from the first through groove 7, and the flip plate 18 is opened on the switching seat 10 to repair the pressure roller 14. At the same time, the switching seat 10 drives another group of movement to switch to the first through groove 7, and then the connecting tube 33 is moved in the direction of the plug-in column 16 on the second rotating rod 32, and the connecting tube 33 is sleeved on the plug-in column 16, and the connecting tube 33 is connected to the plug-in column 16. The connecting tube 33 is pressed against the end of the first rotating rod 15, and the square block 34 at one end of the second rotating rod 32 is tightened to the inner end groove wall of the square groove 35. In this process, the hemispherical end of the predetermined block 41 is pressed onto the plug-in column 16, and the second spring 42 is in a compressed state. At this time, the connecting tube 33 is rotated to drive the plug-in rod 36 and the plug-in rod 40 to rotate as a whole. When the predetermined block 41 at one end of the plug-in rod 40 is rotated to the plug-in hole 17 at the corresponding position on the plug-in column 16, the elastic force of the second spring 42 is used to push the predetermined block 41 into the plug-in hole 1 7, pre-positioning work is performed, and then the bidirectional screw 37 is rotated by the rotating block 38, and the two moving bars 39 synchronously drive the plug-in rod 36 to move toward the middle, thereby driving the plug-in rod 36 to move and insert into the plug-in hole 17 at the corresponding position, thereby realizing the connection between the motor 31 and the corresponding pressure roller 14, and finally starting the motor 31. Under the action of the two gears, the pressure roller 14 in the roller press box 1 is driven to rotate, so that during the process of repairing and replacing the pressure roller 14, the roller press can continue to perform the rolling work of the lead-zinc ore, which greatly improves the work efficiency.

[0021] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller press for processing lead-zinc ore, comprising a roller press box (1), a support frame (2) and a press roller (14), characterized in that: The two sides of the lower side of the roller press box (1) are supported by support frames (2); a feed hopper (3) is installed in the middle of the upper side of the roller press box (1); a material discharge trough (4) is provided at the lower side of the front side of the roller press box (1); a material discharge frame (5) is installed at the edge of the material discharge trough (4) at the front side of the roller press box (1); and two groups of pressing rollers (14) are arranged on the roller press box (1) through a switching structure; The switching structure comprises a first groove (6) formed at a position above the space on the left and right sides of the roller press box (1); a first through groove (7) is formed on a groove wall on one side close to each other of the two first grooves (6); the first through groove (7) is connected to the internal space of the roller press box (1); a switching seat (10) passes through the first through groove (7); two second through grooves (11) are formed in the switching seat (10); two first rotating rods (15) are rotated and passed through the groove wall on the rear side of the second through groove (11); a gear is fixedly sleeved on the groove wall of the first rotating rod (15) near the rear end of the second through groove (11); each group of two gears are meshedly connected; a pressing roller (14) is fixedly sleeved on the first rotating rod (15); a plug-in column (15) is connected to the rear end of the first rotating rod (15). 6), the outer diameter of the plug-in column (16) is 0.7 times the outer diameter of the first rotating rod (15), and a plurality of plug-in holes (17) are provided at equal angles on the circumference of the plug-in column (16). The switching seat (10) is provided with an opening structure at the two second through grooves (11), and a cross bar (8) is connected to the two corners below the groove wall on one side of the first groove (6). A movable plate (9) is movably sleeved on the cross bar (8), and the switching seat (10) is fixedly mounted on the movable plate (9). A cylinder (12) is installed in the middle of the right side of the roller press box (1), and one end of the output shaft of the cylinder (12) is connected to a push-pull rod (13), and one end of the push-pull rod (13) is connected to one of the movable plates (9). A driving structure is provided on the rear side of the roller press box (1).

2. A roller press for processing lead-zinc ore according to claim 1, characterized in that: The flip-opening structure comprises a flip-opening plate (18) hingedly connected to a groove wall on one side of the second through groove (11); a magnetic block (19) is fixedly arranged on the groove wall on one side of the flip-opening plate (18); the magnetic block (19) is adsorbed and fixed on the groove wall on the other side of the second through groove (11); a handle (20) is installed at the edge of a side of the flip-opening plate (18) away from the feed hopper (3); and a supporting structure is arranged on the flip-opening plate (18).

3. A roller press for processing lead-zinc ore according to claim 2, characterized in that: The support structure comprises a second groove (25) provided on the front side of the flip plate (18) at the position of the first rotating rod (15); a through groove (21) is provided on the inner end groove wall of the second groove (25); the groove diameter of the second groove (25) is 1.2 times the groove diameter of the through groove (21); two T-shaped rods (22) are connected to the inner end groove wall of the second groove (25); a sleeve plate (23) is movably sleeved on the T-shaped rods (22); a support rod (24) is connected to the middle of the rear side surface of the sleeve plate (23); a support groove is provided on the front end surface of the first rotating rod (15); and an extrusion structure is provided between the sleeve plate (23) and the front groove wall of the first through groove (7).

4. A roller press for processing lead-zinc ore according to claim 3, characterized in that: The extrusion structure comprises a U-shaped seat (27) mounted in the middle of the front face of the sleeve plate (23), a roller (28) being arranged in the U-shaped seat (27), a first spring (26) being sleeved on the T-shaped rod (22), two ends of the first spring (26) being respectively connected to the sub-sleeve plate (23) and the inner end groove wall of the second groove (25), a fixing strip (29) being fixedly embedded in the front groove wall of the first through groove (7), and both end surfaces of the fixing strip (29) being inclined surfaces.

5. A roller press for processing lead-zinc ore according to claim 1, characterized in that: The driving structure comprises a mounting plate (30) fastened by bolts to a position of the rear side of the roller press box (1) near the switching seat (10); a motor (31) is fixedly mounted on the mounting plate (30); an output shaft of the motor (31) is connected to a second rotating rod (32) that rotates through the mounting plate (30); and a connecting structure is provided on the second rotating rod (32).

6. A roller press for processing lead-zinc ore according to claim 5, characterized in that: The connection structure comprises a connection tube (33) movably sleeved on the second rotating rod (32), a square groove (35) is provided on the inner end groove wall of the connection tube (33), a square block (34) is installed on one end of the second rotating rod (32) movably inserted into the square groove (35), the side surface of the square block (34) is in contact with the inner groove wall of the square groove (35), two plug-in rods (36) movably pass through the side surface of the connection tube (33) away from the second rotating rod (32), the two plug-in rods (36) are distributed in the radial direction of the connection tube (33), a pre-positioning structure is provided on one end of the plug-in rod (36) inserted into the connection tube (33), a rotating plug-in structure is provided on the connection tube (33), and the plug-in rod (36) is movably inserted into the plug-in hole (17) on the corresponding plug-in column (16).

7. A roller press for processing lead-zinc ore according to claim 6, characterized in that: The rotating plug-in structure comprises a bidirectional screw (37) that rotates and passes through the connecting tube (33), the left and right ends of the bidirectional screw (37) have threads in opposite directions, both ends of the bidirectional screw (37) are fixedly sleeved with a rotating block (38), and the bidirectional screw (37) is sleeved with a moving bar (39) near both ends, the moving bar (39) is provided with a thread groove for the bidirectional screw (37) to pass through, and one end of the moving bar (39) is fixedly sleeved on the plug-in rod (36).

8. A roller press for processing lead-zinc ore according to claim 6, characterized in that: The pre-positioning structure comprises an insertion rod (40) movably inserted into one end of the plug rod (36), a pre-positioning block (41) being arranged on one end of the insertion rod (40), the pre-positioning block (41) being in a hemispherical shape at the end away from the plug rod (36), a second spring (42) being sleeved on the insertion rod (40), the two ends of the second spring (42) being respectively connected to the pre-positioning block (41) and the plug rod (36).

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