Cement roller press cloth feeding adjusting structure and roller press

Abstract

The application relates to the technical field of roller press feeding, and discloses a cement roller press cloth feeding adjusting structure and a roller press, which comprises roller seats for respectively supporting two extrusion rollers, the two roller seats are respectively a fixed roller seat and a movable roller seat, arc-shaped supports are arranged in the roller seats, arc-shaped interval plates which can reciprocate in an arc-shaped mode are arranged on the inner sides of the arc-shaped supports, constant gaps are formed between the inner sides of the arc-shaped interval plates and the outer sides of the extrusion rollers, and the end portions of the arc-shaped interval plates which are close to the two extrusion rollers are arranged outside the arc-shaped supports and are hinged with main valve plates; the arc-shaped interval plates and the extrusion rollers form constant large-span arc-shaped gaps, the arc-shaped interval plates are assembled on the roller seats and can displace along with the movable roller seat; even if the movable roller seat is displaced, the gaps remain constant, a long-arc-shaped material blocking barrier is constructed, material pressure relief on the upper part of the roller gap is inhibited, the risks of material collapse, material flushing and material leakage of the steady flow bin are significantly reduced, and the problems of gap out-of-control and material flushing and stoppage after the retreat of the roller seat of the traditional feeding structure are solved.

Description

Technical Field

[0001] This invention relates to the field of roller press feeding technology, specifically to a material feeding adjustment structure for a cement roller press and the roller press itself. Background Technology

[0002] Cement roller presses are energy-saving grinding equipment in the cement industry that operate based on the principle of material layer crushing. They mainly consist of a main frame, fixed rollers, and movable rollers. The fixed rollers are fixedly installed inside the frame, while the bearing seats of the movable rollers can move horizontally within the frame's slide rails. Two independent transmission mechanisms drive the fixed and movable rollers to rotate synchronously in opposite directions at low speeds. The roller surfaces are treated with wear-resistant welding to extend their service life. During production, cement clinker or raw meal is fed into the space between the two rollers from the top feeding device, forming a full feed state. The rollers are continuously drawn into the roller gap pressure zone by the opposing rollers. A hydraulic system provides high pressure, which is applied to the material layer through the movable rollers, relying on the interaction between the material particles... The mutual compression achieves material layer crushing, destroying the internal crystal structure of the material and generating a large number of microcracks. The compressed material forms a dense cake that is discharged from the bottom. The cake contains some fine powder finished product, while the remaining cracked particles are subsequently sent to a dispersing device, powder classifier, or ball mill for further grinding. When an unbreakable hard object enters the roller gap, the movable roller can move backward to increase the roller gap and discharge the foreign object, thereby protecting the roller body and the whole machine from damage. Cement roller presses are often matched with ball mills to form pre-grinding, mixing grinding, and semi-finishing grinding process systems, which can significantly reduce the power consumption of the grinding process and improve the overall processing capacity of the cement grinding system.

[0003] The feeding structure of a roller press determines the pressure of the material column entering the roller and the uniformity of material distribution, making it a key component for ensuring stable material layer crushing. Existing roller presses generally employ first-generation slide plate type, second-generation lever-flip plate type, or third-generation hyperbolic feeding adjustment structure. These types of feeding valve plates can only achieve simple adjustment of the material opening. The gap between the valve plate and the extrusion roller surface is short, and the gap size changes with the valve plate opening. During operation, material pressure leakage is prone to occur. When the stabilizing bin collapses or the fine powder content is high, material shoveling is highly likely to occur. Material shoveling not only causes a large amount of dust to overflow but also leads to overload of the bucket elevator, roller press shutdown, and other malfunctions, severely restricting system operating efficiency. Compared to slide plate and lever-flip plate feeding devices, the hyperbolic feeding adjustment structure improves gap stability; however, the gap between the lower end of the valve plate and the extrusion roller is still not completely constant, and the gap span is small, only the thickness of the valve plate, resulting in insufficiently stable and reliable sealing. Meanwhile, most existing feed adjustment structures are fixed and independent of the movable roller seat. They cannot move synchronously with the movable roller seat. When the roller press encounters a hard object or the roller gap is adjusted or the movable roller retracts, the relative position and gap between the feed valve plate and the extrusion roller will change, further aggravating the problems of material leakage and spurting, and making it impossible to maintain stable material pressure conditions for the roller. In addition, in traditional valve plate adjustment mechanisms, the valve plate and the upper feed box are mostly rigidly hinged. The upper part of the valve plate lacks a sealing compensation structure with the lower end of the feed pipe. During the valve plate opening adjustment process, gaps are prone to appear at the upper part of the valve plate. Fine particles and dust of the material will leak out from the upper part of the valve plate, which not only causes dust pollution, material loss and material slugging, but also the leaked material can easily get stuck between the valve plate transmission components, causing valve plate jamming and interference. This results in the valve plate opening not being adjusted properly, uneven material distribution, and in turn, problems such as uneven load on the roller press, large roller gap deviation, and reduced working efficiency. It also increases the correction burden of the hydraulic system of the equipment, accelerates the wear of components such as roller surface, side baffle, and bearings, and is not conducive to the long-term stable operation of the roller press. Summary of the Invention

[0004] The purpose of this invention is to solve at least one of the problems in the prior art mentioned above, and to provide a material feeding adjustment structure for a cement roller press and a roller press.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The feeding and adjusting structure of a cement roller press includes roller seats that support two extrusion rollers, namely a fixed roller seat and a movable roller seat. Each roller seat has an arc-shaped support inside, and an arc-shaped reciprocating spacer is provided on the inner side of the arc-shaped support. The center of the arc-shaped support and the arc-shaped spacer corresponds to the center of the extrusion roller. A constant gap is formed between the inner side of the arc-shaped spacer and the outer side of the extrusion roller. The end of the arc-shaped spacer near the two extrusion rollers extends out of the arc-shaped support and is hinged to a main valve plate. A feeding chamber for conveying material to the two extrusion rollers is formed between the two main valve plates on the inner side of the fixed roller seat and the movable roller seat.

[0006] Furthermore, each of the main valve plates has a vertical lifting valve plate hinged to its upper end.

[0007] Furthermore, a pad is provided on the upper side of the arc-shaped spacer near the end between the two extrusion rollers, and the pad is hinged to the lower end of the main valve plate.

[0008] Furthermore, the upper and lower ends of the main valve plate are respectively hinged to the lifting valve plate and the arc-shaped partition plate via hinges. The hinges at the upper and lower ends of the main valve plate are located on both sides of the main valve plate, with the upper hinge located on the side of the main valve plate facing the material.

[0009] Furthermore, a feed box is provided above the roller seat, and a discharge pipe is provided in the middle of the feed box; both sides of the lower end of the discharge pipe are provided with cross braces, and the lifting valve plate slides vertically through the cross braces and the outer side of the discharge pipe.

[0010] Furthermore, the upper end of the lifting valve plate is provided with a horizontal folded edge, and a number of vertically sliding stabilizing rods are provided between the upper side of the cross brace and the upper wall of the feed box, and a number of tension springs are connected between the upper side of the feed box and the folded edge.

[0011] Furthermore, the lower outer side of the arc-shaped support is provided with several side boxes, the inside of which is connected to the inner side of the arc-shaped support. An actuator is rotatably installed in each side box. The actuator is an automatic telescopic rod, the telescopic end of which is hinged to the outer end of the arc-shaped partition plate.

[0012] Furthermore, the inner side of the arc-shaped support is provided with several arc-shaped tracks, the cross-section of the arc-shaped tracks is two opposing L-shaped structures, the outer side of the arc-shaped partition is provided with several back ribs extending into the arc-shaped tracks, and the two sides of the back ribs are provided with rollers that move along the inner side of the arc-shaped tracks.

[0013] Furthermore, the outer side of the arc-shaped partition plate is provided with several arc-shaped reinforcing strips.

[0014] The present invention also provides the following technical solution: a roller press, including the cement roller press feeding adjustment structure in any of the above technical solutions.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the arc-shaped spacer plate coincides with the center of the extrusion roller, forming a constant, large-span arc-shaped gap between them. The arc-shaped support and the arc-shaped spacer plate are integrally assembled on the roller seat and can move synchronously with the movable roller seat. Even if the movable roller encounters a hard object and retracts or the roller gap is adjusted and shifted, the gap between the arc-shaped spacer plate and the extrusion roller remains constant, constructing a long arc-shaped material-blocking barrier. This effectively suppresses the pressure relief of material in the upper part of the roller gap, significantly reduces the risk of material collapse in the flow stabilization bin and material rushing and leakage under conditions with a high proportion of fine powder, and solves the problem of uncontrolled gap and material rushing and stopping after the roller seat retracts in the traditional feeding structure. The main valve plate of this invention is hinged to the lifting valve plate and the arc-shaped partition plate at the upper and lower ends, respectively. The continuous hinges can seal the hinge gaps. When the main valve plate swings, it can drive the lifting valve plate to slide vertically. The compound motion has no rotational interference. It can flexibly change the opening of the feeding chamber and avoid fixed gaps at the hinge position, reduce the overflow of fine powder and dust from the hinge part, prevent material from jamming the valve plate transmission parts, and ensure the reliability of the valve plate opening adjustment action. The lifting valve plate of this invention achieves pure vertical sliding under the guidance of the stabilizer bar. With the help of a pre-tensioned tension spring, it adaptively compensates for the displacement changes caused by the swing of the main valve plate. Throughout the entire process of the main valve plate opening and closing, the lifting valve plate always stays in contact with the lower end of the feed tube, automatically compensating for the positional difference caused by the opening change. It can adapt to the synchronous adjustment of the total feed opening of the two main valve plates, as well as the asynchronous differential adjustment of the opening of the two main valve plates, and thus adapt to the individual displacement changes of the movable roller. The arc-shaped partition plate of this invention relies on the back rib and rollers to make arc reciprocating motion along the arc-shaped track. The arc-shaped reinforcing strip improves the rigidity of the arc-shaped partition plate against material impact. The actuators on both sides can adjust the total opening of the material feeding synchronously or adjust the opening of both sides asynchronously and differently. This can specifically compensate for the material deviation phenomenon of the roller press, improve the work balance of the two rollers, and reduce the deviation correction burden of the hydraulic system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a schematic diagram of the small opening state of the cross-section at the actuator of the present invention.

[0019] Figure 4 This is a schematic diagram of the large opening state of the present invention.

[0020] Figure 5 This is a schematic diagram of the retracted state of the movable roller seat according to the present invention.

[0021] Figure 6This is a schematic diagram of the feeding structure of the present invention from a lower view.

[0022] Figure 7 This is a schematic diagram of the feed box structure from the lower side of the present invention.

[0023] Figure 8 This is a side view of the feeding action structure of the present invention.

[0024] Figure 9 This is a three-dimensional schematic diagram of the feeding action structure of the present invention.

[0025] Figure 10 This is a three-dimensional schematic diagram of the inner side of the arc-shaped support of the present invention.

[0026] Figure 11 This is a three-dimensional schematic diagram of the outer side of the arc-shaped support of the present invention.

[0027] Figure 12 This is a side view of the arc-shaped partition plate of the present invention.

[0028] Figure 13 This is a three-dimensional schematic diagram of the inner and outer sides of the arc-shaped partition plate of the present invention.

[0029] Figure 14 This is a three-dimensional schematic diagram of the outer side of the outer end of the arc-shaped partition plate of the present invention.

[0030] In the diagram: 1. Fixed roller seat; 2. Movable roller seat; 3. Arc-shaped support; 4. Arc-shaped partition plate; 5. Main valve plate; 6. Lifting valve plate; 7. Pad strip; 8. Feed box; 9. Feed pipe; 10. Cross brace; 11. Folded edge; 12. Stabilizer bar; 13. Tension spring; 14. Protective cover; 15. Hinge; 16. Side baffle; 17. Side box; 18. Actuator; 19. Hinge seat; 20. Arc-shaped track; 21. Back rib; 22. Roller; 23. Arc-shaped reinforcing strip; 24. Machine base; 25. Drive unit. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Specific embodiments of the cement roller press material feeding adjustment structure provided by the present invention are as follows: Please refer to the attached document. Figures 1-14The feeding and adjusting structure of the cement roller press includes roller seats that support two extrusion rollers respectively. The two roller seats are a fixed roller seat 1 and a movable roller seat 2. The roller press is equipped with a base 24. The fixed roller seat 1 is fixedly installed on the base 24. The movable roller seat 2 is horizontally slidably assembled on the slide rail of the base 24. A wear-resistant sliding plate can be set inside the slide rail of the base 24 to reduce friction loss during the reciprocating sliding process of the movable roller seat 2 and improve the service life of the components.

[0033] A drive component 25 is provided between the machine base 24 and the movable roller seat 2 to drive the movable roller seat 2 to move. In this embodiment, the drive component 25 is a hydraulic cylinder. The movable roller seat 2 is driven to move horizontally and reciprocally by means of the extension and retraction of the hydraulic cylinder, thereby changing the roller gap between the movable extrusion roller and the fixed extrusion roller.

[0034] The movable roller seat 2 is supported by a hydraulic cylinder and can move horizontally back and forth. The roller gap is the gap between the two roller surfaces. The displacement of the movable extrusion roller directly changes the size of the roller gap. During operation, when the particle size, material layer thickness, and hardness of the feed material fluctuate, and the counter-thrust force generated by the material is greater than the set working pressure of the hydraulic system, the material will push the movable roller seat 2 outward, causing the roller gap to passively widen. At this time, the hydraulic oil in the cylinder is pressed into the accumulator to compress the pre-charged nitrogen and store energy. After the foreign object passes through or the peak load of the material disappears, the nitrogen in the accumulator expands and presses the hydraulic oil back into the cylinder, pushing the movable roller seat 2 inward to reset, and the roller gap returns to the normal working range.

[0035] In addition, in actual production, when large iron blocks or unbreakable hard objects with excessive hardness enter the roll gap area, the hydraulic cylinder can quickly retract, driving the movable roller seat 2 to move outward, temporarily increasing the roll gap to discharge foreign objects, thereby protecting the core components such as the extrusion roller surface and bearings from impact damage. After the foreign objects are discharged, the roller is reset and the normal working roll gap is restored.

[0036] Both the fixed roller seat 1 and the movable roller seat 2 are equipped with arc-shaped supports 3 inside. The main body of the arc-shaped support 3 is a semi-circular plate structure. The upper and lower ends of the arc-shaped support 3 are provided with vertical bending parts. The bending parts strengthen the ends of the arc-shaped support 3 and reduce deformation. The arc-shaped openings of the two sets of arc-shaped supports 3 inside the fixed roller seat 1 and the movable roller seat 2 are arranged opposite each other.

[0037] An arc-shaped partition plate 4 is installed on the inner side of the arc-shaped support 3, which can reciprocate along the arc trajectory. The center of the arc-shaped support 3 and the arc-shaped partition plate 4 coincides with the center of the corresponding extrusion roller, so that the gap between each position of the inner side of the arc-shaped partition plate 4 and the outer wall of the extrusion roller surface is always maintained. This gap has a large arc span, which is different from the narrow gap structure of traditional hyperbolic and flip-plate feed valve plates with only valve plate thickness. The long arc constant gap can form an arc-shaped material blocking barrier, which can effectively suppress the material pressure leakage in the upper part of the roller gap. It reduces the risk of material rushing under the conditions of material collapse in the flow stabilization bin, high proportion of fine powder, and excessive material flowability from the root, and avoids a series of production failures such as dust overflow, elevator overload, and unexpected shutdown of the roller press caused by material rushing.

[0038] Multiple arc-shaped tracks 20 are set on the inner side of the arc-shaped support 3. The cross section of the arc-shaped track 20 is two sets of L-shaped steel structures arranged opposite each other. The track is made of wear-resistant steel plate welded together, which can withstand the continuous erosion and wear of dust and materials. Several back ribs 21 are fixed to the outer side of the arc-shaped partition plate 4. The back ribs 21 extend into the arc-shaped track 20. Rollers 22 are installed on both sides of the back ribs 21. The rollers 22 roll against the inner wall of the arc-shaped track 20, thereby realizing the smooth reciprocating sliding of the arc-shaped partition plate 4 along the arc trajectory.

[0039] The back rib 21 extends from the outer end of the arc-shaped partition plate 4 to the inner end near the middle of the two rollers. The extension length exceeds the middle of the arc, but does not reach the inner end of the arc-shaped partition plate 4, so as to avoid the back rib 21 and the roller 22 interfering with the swinging action of the hinge structure at the inner end.

[0040] Multiple arc-shaped reinforcing strips 23 are welded to the outer side of the arc-shaped partition plate 4. The length of the arc-shaped reinforcing strips 23 is greater than that of the back rib 21 and they are closer to the inner end of the arc-shaped partition plate 4. The multiple arc-shaped reinforcing strips 23 are evenly distributed along the arc length direction, which greatly improves the overall impact resistance of the arc-shaped partition plate 4, offsets the material pressure of the upper material column continuously downward, prevents arc deformation caused by long-term material squeezing, and ensures that the constant gap between the arc-shaped partition plate 4 and the extrusion roller can be stable for a long time, avoiding the problem of material leakage and flushing caused by gap deformation failure.

[0041] A side box 17 is provided on the lower outer side of the arc-shaped support 3. Each set of arc-shaped supports 3 is equipped with two sets of side boxes 17, which are arranged symmetrically front and back. The cavity of the side box 17 is connected to the inner space of the arc-shaped support 3. The side box 17 provides installation space for the actuator 18 on the one hand, and protects the actuator 18 on the other hand, blocking most of the material dust from directly impacting the actuator 18 body.

[0042] The actuator 18 is rotatably installed inside the side box 17. In this embodiment, the actuator 18 is an electric automatic telescopic rod. The middle part of the actuator 18 is hinged inside the side box 17, so that the actuator 18 itself moves with the angle. The telescopic end of the actuator 18 is hinged to the hinge seat 19 set at the outer end of the arc-shaped partition plate 4. The two sets of actuators 18 keep synchronous telescopic movements, driving the arc-shaped partition plate 4 to slide back and forth in an arc along the arc-shaped track 20 by means of the roller 22. In practical applications, the actuator 18 can also be replaced by a hydraulic telescopic rod, which can be flexibly selected according to the on-site automation control scheme.

[0043] An arc-shaped support 3 extends from the inner end of the arc-shaped partition plate 4 near the two extrusion rollers. A pad 7 is fixedly installed on the upper side of the end of this support. The pad 7 is a welded and fixed wear-resistant steel strip. The pad 7 raises the hinge point to prevent the arc-shaped reinforcing strip 23 on the outer side of the arc-shaped partition plate 4 from interfering with the deflection of the main valve plate 5. This avoids the reinforcing strip from hitting and jamming the main valve plate 5, ensuring that the main valve plate 5 can smoothly complete the angle deflection action even at a small opening.

[0044] The main valve plate 5 is hinged to the gasket 7. The lower end of the main valve plate 5 is hinged to the gasket 7 via a hinge 15. The upper end of the main valve plate 5 is also hinged to the vertically arranged lifting valve plate 6 via a hinge 15. The hinges 15 at the top and bottom of the main valve plate 5 are respectively arranged on both sides of the main valve plate 5. The upper hinge 15 is located on the side of the main valve plate 5 facing the material; the lower hinge 15 is located on the side facing away from the material, i.e., away from the lower feed chamber.

[0045] Continuous hinges 15 are preferred for hinge 15. Continuous hinges 15 can be arranged along the entire section of the valve plate, which can maximize the sealing of hinge gaps and suppress the leakage of fine powder materials from the hinge position. In the assembled state, the opening angle of the upper hinge 15 of the main valve plate 5 is obtuse, and the opening angle of the lower hinge 15 is acute. This angle arrangement is suitable for the combined movement of the swing of the main valve plate 5 and the vertical sliding of the lifting valve plate 6, and will not cause the hinge 15 to jam or the rotation to interfere.

[0046] The two main valve plates 5 mounted on the inner sides of the fixed roller seat 1 and the movable roller seat 2 together form a feeding chamber. The feeding chamber is aligned downwards with the roller gap of the two sets of extrusion rollers. The front and rear sides of the feeding chamber are blocked by side baffles 16. The side baffles 16 are installed on the lower side of the front and rear walls of the feed box 8. The side baffles 16 have an overall near-inverted trapezoidal structure with a larger upper part and a smaller lower part. The inner side of the side baffles 16 is located outside the end face of the extrusion roller, preventing material leakage from the front and rear end faces of the extrusion roller and reducing uneven material distribution caused by material running at the edges.

[0047] A feed box 8 is installed above the roller seat, and a square discharge pipe 9 is installed in the middle of the feed box 8. A flange structure is installed at the upper end of the discharge pipe 9. The upper end of the discharge pipe 9 is connected to the lower end of the flow stabilizing chamber through the flange to receive the material from the flow stabilizing chamber and transmit the pressure of the material column formed by the flow stabilizing chamber to ensure that the material entering the roller has a stable pressure.

[0048] Both sides of the lower end of the feed pipe 9 are provided with cross braces 10. The cross braces 10 are made of shaped steel or steel plate welded together. The cross braces 10 provide sliding guide support for the lifting valve plate 6. The lifting valve plate 6 is vertically slidably assembled in the gap between the cross brace 10 and the outer wall of the feed pipe 9. The lifting valve plate 6 can slide up and down along the guide of the cross brace 10.

[0049] The upper end of the lifting valve plate 6 is provided with a horizontally extending outward folded edge 11; multiple stabilizing rods 12 are arranged between the upper side of the cross brace 10 and the upper wall of the feed box 8. The stabilizing rods 12 are arranged vertically and slide through the folded edge 11 to guide the movement of the lifting valve plate 6, restricting the lifting valve plate 6 to only make vertical displacement, and preventing the lifting valve plate 6 from tilting or getting stuck.

[0050] Multiple sets of tension springs 13 are connected between the upper side of the feed box 8 and the folded edge 11, and the tension springs 13 are sleeved on the outside of the stabilizer rod 12. The working principle of the tension springs 13 is as follows: the tension springs 13 maintain a pre-stretched state and continuously pull the folded edge 11 upward; when the main valve plate 5 swings outward and the lower end opening increases, the upper end of the main valve plate 5 will push the lifting valve plate 6 upward, and the tension springs 13 provide upward pulling force to assist the folded edge 11 in upward displacement and ensure the stability of the lifting valve plate 6; when the main valve plate 5 retracts inward and the opening decreases, the upper end of the main valve plate 5 applies downward pulling force to the lifting valve plate 6, and the lifting valve plate 6 drives the folded edge 11 to move downward against the pulling force of the tension springs 13. At the same time, the tension springs 13 can ensure the stability of the lifting valve plate 6, reduce the vibration of the valve plate mechanism, suppress the valve plate slapping noise, and improve the operational stability; the multiple sets of tension springs 13 are evenly arranged to ensure that the folded edge 11 is subjected to balanced force.

[0051] The cross brace 10 is bolted to the side of the feed pipe 9. The cover 14 is installed on the outside of the stabilizer bar 12 and the tension spring 13 to prevent dust and material particles from entering the tension spring 13 and the guide rod area, and to prevent material accumulation and jamming that could cause the mechanism to fail. The cover 14 is bolted and can be detached. During maintenance and repair, the cover 14 can be directly removed to facilitate the inspection and replacement of the tension spring 13 and the stabilizer bar 12.

[0052] All the arc-shaped supports 3 and arc-shaped spacers 4 in this structure are installed on the fixed roller seat 1 and the movable roller seat 2. The entire feeding adjustment structure can move synchronously with the roller seat, which is different from the traditional structure where the feeding valve plate is independently fixed on the frame. When the roller press encounters hard objects or needs to widen the roller gap due to roller gap adjustment, the drive component 25 drives the movable roller seat 2 to move horizontally. The movable roller seat 2, together with the arc-shaped supports 3 and arc-shaped spacers 4 on it, moves synchronously. The center of the arc-shaped spacer 4 and the movable extrusion roller always coincides. The constant arc gap between the two will not change due to the roller seat retraction. This avoids the defects of the traditional structure where the gap increases and material leakage occurs after the roller seat retraction. As the movable roller seat 2 moves, it causes the corresponding main valve plate 5 to shift position. The main valve plate 5 deflects, and through the hinge 15, it causes the lifting valve plate 6 to move vertically. The lifting valve plate 6 slides up and down automatically under the guidance of the stabilizer 12. The tension spring 13 adaptively expands and contracts to compensate for the displacement of the movable roller seat 2, so that there will be no jamming or material leakage gaps.

[0053] Opening adjustment process: The actuator 18 extends or retracts synchronously, driving the arc-shaped partition plate 4 to slide back and forth along the arc-shaped track 20. The inner end of the arc-shaped partition plate 4 drives the lower end of the main valve plate 5 to move in an arc, realizing the swing of the main valve plate 5, thereby changing the feeding opening of the feeding chamber formed between the two main valve plates 5; during the swing of the main valve plate 5, the upper hinged lifting valve plate 6 follows by vertically lifting and sliding, thereby adapting to the arc displacement of the lower end of the main valve plate 5. Under small opening conditions, such as Figure 3 As shown, the two sets of arc-shaped partition plates 4 move closer to the middle of the two rollers, the opening of the main valve plate 5 decreases, and the flow cross-section of the feeding chamber decreases, making it suitable for small-volume production. It can also be used for small-flow feeding during equipment start-up and shutdown. Under large-opening conditions, such as Figure 4 As shown, the arc-shaped partition plate 4 moves outward in an arc direction, the main valve plate 5 opens, and the flow cross-section of the feeding chamber increases to meet the requirements of large material processing capacity. Regardless of the opening size, the arc-shaped partition plate 4 and the extrusion roller surface always maintain a constant arc-shaped gap, forming a long-distance sealing barrier to effectively prevent material overflow and pressure leakage. During production, the actuators 18 on both sides can also be adjusted asynchronously to achieve differential adjustment of the opening of the feeding chamber on the left and right sides, thereby compensating for the problem of material distribution deviation in the roller press, improving the balance of work done by the rollers on both sides of the roller press, and alleviating the correction burden on the hydraulic system of the equipment.

[0054] This embodiment also provides a roller press, which includes the material feeding adjustment structure of the cement roller press described in the above embodiment. A fixed extrusion roller is rotatably installed inside the fixed roller seat 1, and a movable extrusion roller is rotatably installed inside the movable roller seat 2. The extrusion roller surface is overlaid with a wear-resistant layer to improve the wear resistance life of the roller surface. The fixed roller seat 1 is fixedly installed on the machine base 24, and the movable roller seat 2 is horizontally slidably assembled on the machine base 24. A driving component 25 is provided between the machine base 24 and the movable roller seat 2. The driving component 25 is a hydraulic cylinder, which extends and retracts to drive the movable roller seat 2 to move horizontally, adjusting the roller gap between the fixed extrusion roller and the movable extrusion roller. Because of its feeding adjustment structure, this roller press can maintain stable material column pressure under various complex working conditions such as material collapse in the flow silo, high fine powder content, retraction of the movable roller, and frequent output adjustments. This reduces material spurting, leakage, and dust overflow, lowers the probability of roller press eccentric loading, large roller gap deviation, and equipment shutdown, reduces abnormal wear on the roller surface, side baffle 16, and bearings, effectively improves the overall machine operating rate, and reduces the operation and maintenance costs of the cement grinding system.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material feeding adjustment structure for a cement roller press, characterized in that, The system includes roller seats that support two extrusion rollers respectively. The two roller seats are a fixed roller seat (1) and a movable roller seat (2). Each roller seat is provided with an arc-shaped support (3). The inner side of the arc-shaped support (3) is provided with an arc-shaped reciprocating spacer (4). The center of the arc-shaped support (3) and the arc-shaped spacer (4) corresponds to the center of the extrusion roller. A constant gap is formed between the inner side of the arc-shaped spacer (4) and the outer side of the extrusion roller. The end of the arc-shaped spacer (4) near the two extrusion rollers extends out of the arc-shaped support (3) and is hinged with a main valve plate (5). A feeding chamber for conveying materials to the two extrusion rollers is formed between the two main valve plates (5) on the inner side of the fixed roller seat (1) and the movable roller seat (2).

2. The cement roller press material feeding adjustment structure according to claim 1, characterized in that, The upper end of the main valve plate (5) is hinged with a vertical lifting valve plate (6).

3. The cement roller press material feeding adjustment structure according to claim 2, characterized in that, The arc-shaped spacer plate (4) has a pad (7) on the upper side of the end near the two extrusion rollers. The pad (7) is hinged to the lower end of the main valve plate (5).

4. The cement roller press material feeding adjustment structure according to claim 3, characterized in that, The upper and lower ends of the main valve plate (5) are respectively hinged to the lifting valve plate (6) and the arc-shaped partition plate (4) via hinges (15). The hinges (15) at the upper and lower ends of the main valve plate (5) are located on both sides of the main valve plate (5), and the upper hinge (15) is located on the side of the main valve plate (5) facing the material.

5. The cement roller press material feeding adjustment structure according to claim 2, characterized in that, The roller seat is provided with a feeding box (8) above it, and a feeding pipe (9) is provided in the middle of the feeding box (8); both sides of the lower end of the feeding pipe (9) are provided with cross braces (10), and the lifting valve plate (6) slides vertically through the cross braces (10) and the outside of the feeding pipe (9).

6. The cement roller press material feeding adjustment structure according to claim 5, characterized in that, The upper end of the lifting valve plate (6) is provided with a horizontal folded edge (11). There are several vertically sliding stabilizing rods (12) between the upper side of the cross brace (10) and the upper wall of the feed box (8). There are several tension springs (13) connected between the upper side of the feed box (8) and the folded edge (11).

7. The cement roller press material feeding adjustment structure according to claim 1, characterized in that, The lower outer side of the arc-shaped support (3) is provided with several side boxes (17). The inside of the side boxes (17) is connected to the inside of the arc-shaped support (3). An actuator (18) is rotatably installed in each side box (17). The actuator (18) is an automatic telescopic rod, and the telescopic end is hinged to the outer end of the arc-shaped partition plate (4).

8. The cement roller press material feeding adjustment structure according to claim 1, characterized in that, The inner side of the arc-shaped support (3) is provided with several arc-shaped tracks (20). The cross section of the arc-shaped track (20) is two opposing L-shaped structures. The outer side of the arc-shaped partition plate (4) is provided with several back ribs (21) extending into the arc-shaped track (20). The back ribs (21) are provided with rollers (22) on both sides that move along the inner side of the arc-shaped track (20).

9. The cement roller press material feeding adjustment structure according to claim 1, characterized in that, The outer side of the arc-shaped partition plate (4) is provided with several arc-shaped reinforcing strips (23).

10. A roller press, characterized in that, Includes the cement roller press material feeding adjustment structure according to any one of claims 1-9.

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