CN221847334U - Cement clinker grinding equipment for cement preparation - Google Patents

Abstract

The utility model relates to cement clinker grinding equipment for cement production, which comprises a pulverizer, a wind inlet machine and a powder selecting machine, wherein a fixed millstone and a central rotating shaft are arranged in the pulverizer, the lower end of the central rotating shaft is connected with a right-angle commutator, an axial flow fan blade of the wind inlet machine and a cage-shaped rotor of the powder selecting machine are coaxially arranged on the central rotating shaft, a longitudinal shaft sleeve is arranged on the outer side of the middle part of the central rotating shaft, two lateral shafts are connected on two sides of the longitudinal shaft sleeve, grinding mill wheels are arranged on the lateral shafts, a feeding hopper is arranged on the outer wall of the pulverizer, a discharge hole at the bottom of the feeding hopper extends to the position above the grinding mill wheels, crushing pair rollers are arranged in the feeding hopper, the shafts of the two crushing pair rollers are connected with a double-shaft speed reducer, a power motor is arranged on a supporting base, and the right-angle commutator and the double-shaft speed reducer are in transmission connection with the power motor. By additionally arranging the crushing device at the feed inlet, the cement clinker can be directly fed without pretreatment, and the power motor is in linkage design and mechanical pressurization design for grinding rollers, so that the number of motors and an external hydraulic system are saved.

Description

A cement clinker grinding equipment for cement preparation

Technical Field

The utility model belongs to the field of cement production equipment, and specifically relates to cement clinker grinding equipment for cement preparation.

Background Art

Cement clinker is a semi-finished cement made from limestone, clay and iron raw materials in appropriate proportions, calcined and cooled. Cement clinker needs to go through grinding, powder selection and other processes to finally get finished cement. The grinding process of cement clinker requires grinding equipment, and the most common one is Raymond mill, which is mainly composed of three parts: the air inlet at the bottom, the grinding roller in the middle and the powder selector at the top. However, the existing Raymond mill power mechanism is relatively complicated. The air inlet fan is equipped with a separate air inlet motor, the grinding roller is equipped with a separate grinding motor, and the powder classifier is equipped with a separate powder classifier motor. The three power motors not only increase the manufacturing cost of the grinding equipment, but also increase the number of motors, operating energy consumption, motor failure frequency and motor maintenance cost; and the existing Raymond mill grinding rollers all use hydraulic pressurization, and need to be equipped with an external hydraulic system accordingly, which further increases the equipment manufacturing cost and operating cost; in addition, before processing cement clinker, the existing Raymond mill needs to use a crusher to pre-treat the cement clinker, and the larger pieces of cement clinker are preliminarily crushed into small pieces of material, and then ground, which further increases the equipment investment, and the extra pretreatment process is not conducive to improving the grinding efficiency and grinding effect.

Utility Model Content

In view of the above situation, the utility model provides a cement clinker grinding equipment for cement preparation, which eliminates the cement clinker pretreatment process through reasonable structural design, and saves the number of motors used and the cost investment of an external hydraulic system.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

A cement clinker grinding device for cement preparation comprises a vertical cylindrical grinding mill, an air inlet fan connected through the bottom of the grinding mill, and a powder classifier connected through the top of the grinding mill, wherein a fixed grinding disc is coaxially arranged at the inner bottom of the grinding mill, and a louver air outlet is arranged between the edge of the fixed grinding disc and the inner wall of the grinding mill.

A central rotating shaft is coaxially arranged in the grinding mill. The central rotating shaft rotates through the center of the fixed grinding disc. The upper end of the central rotating shaft is rotationally connected to the powder classifier, and the lower end of the central rotating shaft is connected to a right-angle commutator.

The air inlet fan is provided with axial flow blades, and the powder classifier is provided with a cage rotor. The axial flow blades and the cage rotor are coaxially arranged at the upper and lower parts of the central rotating shaft.

A supporting base is arranged under the bottom of the grinding mill, the air inlet fan is located inside the supporting base, the air inlet of the air inlet fan extends to the outside of the supporting base, and an air outlet is arranged on the top of the powder classifier. The cement clinker powder is lifted upward for air conveyance, and then filtered and selected by the rotating cage rotor of the powder classifier and the protective mesh plate on its top.

A longitudinal sleeve is arranged outside the middle of the central rotating shaft, and two transverse axles are symmetrically fixedly connected on both sides of the longitudinal sleeve. A grinding wheel is rotatably arranged on each of the two transverse axles, and the outer peripheral surface of the grinding wheel is in rolling contact with the upper surface of the fixed grinding disc.

A feed hopper is arranged on the outer side wall of the top of the grinding mill, and a discharge port at the bottom of the feed hopper extends through a feeding chute through the side wall of the grinding mill to above the grinding wheel.

A pair of crushing rollers are arranged inside the feed hopper, one end of the roller shaft of the two crushing rollers is rotatably connected to the outer wall of the grinding mill, and the other end extends to the outside of the feed hopper and is connected to a double-axis reducer.

A power motor is arranged on one side of the support base, and the right-angle commutator and the dual-axis reducer are respectively connected to the power motor through a transmission component 1 and a transmission component 2.

Furthermore, the fixed grinding disc is fixedly connected to the inner wall of the grinding mill via an annular louvered air outlet, and the wind introduced by the air inlet fan can pass upward through the louvered air outlet and enter the interior of the grinding mill.

Furthermore, the central rotating shaft rotates through the middle of the fixed grinding disc through an intermediate bearing, and the upper end of the central rotating shaft is rotatably connected to the powder classifier through a top bearing.

Furthermore, a coaxial sliding sleeve on the outer side of the middle portion of the central rotating shaft is provided with a longitudinal shaft sleeve, and a guide flat key is vertically provided between the longitudinal shaft sleeve and the central rotating shaft.

Furthermore, a limiting ring is arranged above the longitudinal sleeve, the limiting ring is coaxially sleeved on the outside of the central rotating shaft, the limiting ring is tightly connected to the central rotating shaft by a locking top screw, a pressure spring is arranged between the longitudinal sleeve and the limiting ring, and a rubber dust cover is sleeved on the outside of the pressure spring.

Furthermore, the two transverse wheel shafts are each rotatably connected to a grinding wheel via a rolling bearing, and the grinding wheel can roll and grind the cement clinker on the fixed grinding disc.

Furthermore, a feed port is arranged at the top of the feed hopper, and a feed chute is connected to the discharge port at the bottom of the feed hopper, and the discharge end of the feed chute passes through the side wall of the grinding mill and extends obliquely to above the grinding wheel.

Furthermore, a closable inspection door is provided on the side wall of the grinding mill, which can be used by maintenance personnel to enter the grinding mill for inspection and maintenance.

Furthermore, a protective mesh plate is provided on the top air outlet of the powder classifier, which can isolate and protect the cage rotor of the powder classifier on the one hand, and also has a filtering effect to prevent large-particle cement clinker from overflowing on the other hand.

The present invention also includes other components that enable it to be used normally, all of which are conventional means in the field. In addition, devices or components not limited in the present invention, such as axial flow fan blades, cage rotors, grinding wheels, right-angle commutators and dual-axis reducers, all adopt the existing technology in the field.

The beneficial effects of the utility model are as follows:

The utility model provides a cement clinker grinding equipment for cement preparation. By adding a crushing device to the feed port of the grinding mill, the grinding equipment can directly feed cement clinker without the need for cement clinker pretreatment. Moreover, through the reasonable motor power linkage structure design and the mechanical pressurizing structure design of the grinding wheel, the number of motors used and the external hydraulic system are saved, thereby greatly saving the equipment manufacturing cost, operating cost and maintenance cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a cement clinker grinding device in an embodiment.

Fig. 2 is a schematic diagram of the structure of the crushing rollers along the A-A direction in Fig. 1.

DETAILED DESCRIPTION

The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

Example

As shown in FIG1 , a cement clinker grinding device for cement preparation includes a vertical cylindrical grinding mill 1, an air inlet fan 2 connected to the bottom of the grinding mill, and a powder classifier 3 connected to the top of the grinding mill. A fixed grinding disc 4 is coaxially arranged at the bottom of the inner side of the grinding mill, and a louver air outlet 5 is arranged between the edge of the fixed grinding disc and the inner wall of the grinding mill.

A central rotating shaft 6 is coaxially arranged in the grinding mill, and the central rotating shaft rotates through the center of the fixed grinding disc, the upper end of the central rotating shaft is rotatably connected to the powder classifier, and the lower end of the central rotating shaft is connected to a right-angle commutator 7. The right-angle commutator includes a square box-type housing and a bevel gear meshing transmission structure inside it, and its internal structure is similar to the internal structure of the right-angle commutator disclosed in patent document CN105114550B, which is a prior art, and the specific setting is not repeated here.

An axial flow fan blade 8 is arranged in the air inlet fan, and a cage rotor 9 is arranged in the powder classifier. The axial flow fan blade and the cage rotor are coaxially arranged at the upper and lower parts of the central rotating shaft.

A support base 10 is provided below the bottom of the grinding mill, and the air inlet fan is located inside the support base. The air inlet 11 of the air inlet fan extends to the outside of the support base. The air inlet can be externally connected to the hot air outlet of the cement kiln grate cooler, so that the air inlet fan can blow hot air into the grinding mill. The grinding mill not only grinds the cement clinker but also plays a certain drying role.

An air outlet 12 is arranged on the top of the powder classifier, and a protective mesh plate 13 is also arranged on the air outlet. The protective mesh plate is made of a steel porous plate. On the one hand, it can isolate and protect the cage rotor of the powder classifier, and on the other hand, it also has a filtering effect to prevent large-particle cement clinker from overflowing.

The cement clinker powder after grinding and drying is lifted up by the air inlet fan for air conveyance, and then filtered and sorted by the rotating cage rotor of the powder classifier and the protective mesh plate on its top. The cement clinker that does not meet the fineness requirements of the cement finished product falls back into the grinder for further grinding, and the powder that meets the fineness requirements is discharged from the air outlet to the dust removal system for sedimentation and collection to become the cement finished product.

The coaxial sliding sleeve on the outer side of the middle of the central shaft is provided with a longitudinal sleeve 14, and a guide flat key 15 is vertically arranged between the longitudinal sleeve and the central shaft, so that the longitudinal sleeve can only slide up and down on the outer side of the central shaft, and can rotate with the central shaft. Two transverse axles 16 are symmetrically fixed on both sides of the longitudinal sleeve. In order to enhance the connection strength between the transverse axle and the longitudinal sleeve, a reinforcing rib plate is welded between the two. A grinding wheel 17 is rotatably arranged on each of the two transverse axles, and the outer peripheral surface of the grinding wheel is in rolling contact with the upper surface of the fixed grinding disc.

A limiting ring 18 is arranged above the longitudinal sleeve, and the limiting ring is coaxially sleeved on the outside of the central rotating shaft. The limiting ring is tightly connected to the central rotating shaft by a locking top screw 19. The clamping position of the limiting ring on the central rotating shaft can be adjusted, thereby realizing the adjustment of the downward pressing pressure of the longitudinal sleeve by the top pressure spring. A top pressure spring 20 is arranged between the longitudinal sleeve and the limiting ring, and a rubber dust cover 21 is arranged on the outer side of the top pressure spring to avoid cement clinker from being stuck in the middle of the top pressure spring as much as possible, thereby playing a certain protective role.

The side wall of the grinding mill is also provided with a switchable inspection door 22, which can be used by maintenance personnel to enter the grinding mill for inspection and maintenance.

A feed hopper 23 is provided on the outer wall of the top of the grinding mill, a feed port is provided on the top of the feed hopper, and a feed chute 24 is connected to the discharge port at the bottom of the feed hopper, and the discharge end of the feed chute passes through the side wall of the grinding mill and extends obliquely to the top of the grinding wheel. The upper surface of the fixed grinding disc is a hill-like structure with a slightly higher center and lower surroundings, and a slightly raised annular cofferdam is also provided on the edge of the fixed grinding disc. After the cement clinker slides from the feed distillation pipe to a position near the center above the fixed grinding disc, it will automatically spread out to the surroundings without easily overflowing from the edge.

As shown in FIG. 2 , a pair of crushing rollers 25 are arranged inside the feed hopper, one end of the roller shaft of the two crushing rollers is rotatably connected to the outer wall of the grinding mill, and the other end extends to the outside of the feed hopper and is connected to a double-axis reducer 26 .

The double-shaft reducer is a single-input-shaft double-output-shaft gearbox reducer, and the two output shafts rotate in opposite directions, both rotating toward the middle direction, thereby driving the two crushing rollers to perform preliminary extrusion and crushing of the cement clinker, and the crushing rollers are provided with crushing tooth surfaces. The double-shaft reducer adopts the existing technology, and the specific structural setting is not repeated here.

A power motor 27 is arranged on one side of the support base, and the right-angle commutator and the dual-axis reducer are connected to the power motor through transmission assembly 1 and transmission assembly 2 respectively.

The transmission component 1 and the transmission component 2 are both belt transmission components, including a double-groove driving pulley 28 installed on the power motor, a driven pulley 29 installed on the input shaft of the right-angle commutator, and a driven pulley 2 30 installed on the input shaft of the dual-axis reducer. A transmission belt 1 31 is connected between the double-groove driving pulley and the driven pulley 1, and a transmission belt 2 32 is connected between the double-groove driving pulley and the driven pulley 2.

The fixed grinding disc is fixedly connected to the inner wall of the grinding mill via an annular louvered air outlet, and the wind introduced by the air inlet fan can pass upward through the louvered air outlet and enter the interior of the grinding mill.

The central rotating shaft rotates through the middle of the fixed grinding disc through an intermediate bearing, and the upper end of the central rotating shaft is rotatably connected to the protective screen of the powder classifier through a top bearing.

The two transverse wheel shafts are rotatably connected to grinding wheels through rolling bearings, and the grinding wheels can roll and grind the cement clinker on the fixed grinding disc. The longitudinal sleeve is slidably mounted on the central rotating shaft. Due to the guiding effect of the guide flat key, the longitudinal sleeve can only slide up and down, and at the same time rotate synchronously with the central rotating shaft. In addition, due to the downward pressing thrust of the top pressure spring on the longitudinal sleeve, the longitudinal sleeve has a downward pressing tendency, so that the grinding wheel not only relies on its own gravity, but also increases the downward pressing force, which helps to improve the grinding efficiency and effect of cement clinker.

The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the protection scope of the present invention.

Claims (9)

1. The utility model provides a cement clinker grinding equipment for cement preparation, includes the cylindric grinder of vertical and link up the air inlet machine of connecting in the grinder below and link up the selection powder machine of connecting in the grinder top, its characterized in that: the inside bottom of the pulverizer is coaxially provided with a fixed millstone, a louver air port is arranged between the edge of the fixed millstone and the inner wall of the pulverizer, a central rotating shaft is coaxially arranged in the pulverizer, the central rotating shaft penetrates through the center of the fixed millstone, the upper end of the central rotating shaft is rotationally connected with the pulverizer, the lower end of the central rotating shaft is connected with a right-angle reverser, an axial flow fan blade is arranged in a blower, a cage rotor is arranged in the pulverizer, the axial flow fan blade and the cage rotor are coaxially arranged at the upper part and the lower part of the central rotating shaft, a supporting base is arranged below the bottom of the pulverizer, the air inlet machine is positioned in the supporting base, an air inlet of the air inlet machine extends to the outer side of the supporting base, an air outlet is arranged at the top of the pulverizer, a longitudinal shaft sleeve is arranged at the outer side of the middle part of the central rotating shaft, two transverse shafts are symmetrically fixedly connected with two transverse shafts, grinding wheels are respectively rotationally arranged on the two transverse shafts, the outer peripheral surfaces of the grinding wheels are in rolling contact with the upper surface of the fixed millstone, a feeding hopper is arranged on the outer side wall of the top of the pulverizer, a discharging port of the feeding hopper penetrates through the side wall of the feeding hopper to the pulverizing mill to the upper side of the grinding wheels, a pair of rollers are coaxially arranged in the feeding hopper, a pair of rollers are arranged inside the pulverizing rollers, one side of motors are respectively, one end of the two pairs of rollers are connected with a two-shaft power transmission assemblies is connected with one side of the two-shaft power transmission assemblies, and one side of the two-shaft power transmission device is connected with one side of the two-shaft power transmission device, and the two-shaft power transmission device is connected to the two sides of the two spindle power roller and the two power roller are respectively.

2. A cement clinker grinding apparatus for cement manufacture according to claim 1, wherein: the periphery of the fixed grinding disc is fixedly connected with the inner wall of the pulverizer through a circular shutter air port.

3. A cement clinker grinding apparatus for cement manufacture according to claim 2, wherein: the central rotating shaft passes through the middle of the fixed millstone through the middle bearing, and the upper end of the central rotating shaft is rotationally connected with the powder concentrator through the top bearing.

4. A cement clinker grinding apparatus for cement manufacture according to claim 3, wherein: the middle outer side of the central rotating shaft is coaxially sleeved with a longitudinal shaft sleeve in a sliding mode, and a guide flat key is vertically arranged between the longitudinal shaft sleeve and the central rotating shaft in a matched mode.

5. A cement clinker grinding apparatus for cement manufacture according to claim 4, wherein: the upper part of the longitudinal shaft sleeve is provided with a limiting ring, the limiting ring is coaxially sleeved outside the central rotating shaft, the limiting ring is tightly propped and connected onto the central rotating shaft through a locking jackscrew, a propping spring is arranged between the longitudinal shaft sleeve and the limiting ring, and a rubber dust cover is sleeved outside the propping spring.

6. A cement clinker grinding apparatus for cement manufacture according to claim 5, wherein: the two transverse wheel shafts are respectively connected with grinding rollers through rolling bearings in a rotating mode.

7. A cement clinker grinding apparatus for cement manufacture according to claim 6, wherein: the top of feeder hopper is provided with the feed inlet, and the bottom discharge gate of feeder hopper is connected with the feed elephant trunk, and the discharge end of feed elephant trunk passes the pulverizer lateral wall slant and extends to grinding mill top.

8. A cement clinker grinding apparatus for cement manufacture according to claim 7, wherein: and the side wall of the pulverizer is also provided with an access door which can be opened and closed.

9. A cement clinker grinding apparatus for cement manufacture according to claim 8, wherein: and a protective screen plate is further arranged on the air outlet at the top of the powder concentrator.