Integrated System for Cement Slurry Preparation, Mixing and Transportation

Abstract

The present invention provides an integrated system for preparing, stirring and transporting cement slurry. The integrated system for preparing, stirring and transporting cement slurry includes a pulp making machine and a mixer. The pulp making machine is located above the mixer, and the slurry outlet pipeline of the mixer is connected to the inlet of a transport pump. The pulp making machine is supported on an upper frame through a plurality of weighing sensors. A water inlet pipeline is provided at the top of the pulp making machine, and an automatic water inlet valve is arranged on the water inlet pipeline. The water inlet pipeline is movably connected to a liquid inlet at the top of the cylinder body of the pulp making machine. A cement feed inlet is further provided at the top of the pulp making machine. By adopting a modular frame stacking structure, the pulp making machine is stacked above the mixer, and the input cement and water can be accurately weighed, thereby ensuring the accuracy of the water-cement ratio. The system of the present invention is convenient for on-site installation and disassembly, has high pulp making precision, high speed, requires a small number of operating personnel, and only one operator is required at least.

Description

Technical Field

[0001] The invention relates to the field of cement slurry preparation, in particular to an integrated system for cement slurry preparation, stirring and conveying. Background Art

[0002] Existing large-scale structures, such as the cement slurry station construction site of a hydropower station, are usually equipped with cement silos and screw conveyors, centralized water supply systems, air compressors, and then equipped with independent pulping machines, mixers and slurry pumps, and set up corresponding pipelines to form a set of pulping systems. However, the installation, disassembly and maintenance of the system are time-consuming and labor-intensive. In addition, the pulping equipment is generally manually operated or semi-automatically operated. A cement pulping station requires about 4 to 5 people per shift, which has high labor intensity, low output, inaccurate pulping precision, and affected pulping quality.

[0003] Chinese patent document CN 207260139 U records an intelligent slurry making device for cement mixing pile machine, which automatically controls the ratio of cement and water by setting a weighing device at the cement discharge port and a flow rate detector on the water pipe. However, this measurement method has low accuracy and the quality of cement slurry configuration is difficult to guarantee. Chinese patent document CN 208263155 U records an integrated horizontal cement slurry making system, which integrates the slurry storage barrel, water tank and mixer for joint slurry making, but the automation level of this solution is low. It is difficult to achieve automatic slurry mixing. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an integrated system for preparing, mixing and conveying cement slurry, which can realize fully automatic high-precision slurry preparation, and the prepared cement slurry can be temporarily stored according to the user's usage requirements, and the long-distance transportation of cement slurry can also be realized.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cement slurry slurry mixing and conveying integrated system, comprising a slurry slurry machine and a mixer, the slurry slurry machine is located above the mixer, and the slurry outlet pipeline of the mixer is connected to the inlet of the conveying pump;

[0006] The pulping machine is supported on the upper frame through a plurality of weighing sensors, a water inlet pipeline is provided on the top of the pulping machine, an automatic water inlet valve is provided on the water inlet pipeline, and the water inlet pipeline is movably connected to the liquid inlet port on the top of the cylinder of the pulping machine;

[0007] A cement feed port is also provided on the top of the pulping machine.

[0008] In a preferred embodiment, a plurality of auxiliary support structures are further provided on the outer wall of the pulp mill cylinder. The structure of the auxiliary support structure is as follows: a cantilever seat is provided on the outer wall of the pulp mill cylinder, a through hole is provided on the cantilever seat, a bolt is vertically fixed on the upper frame, the through hole is sleeved with the bolt, and an adjustable nut is provided below the through hole on the bolt. The position of the adjustable nut is set at the maximum value of the weighing sensor range, that is, when the weighing sensor receives the maximum value of the range, the cantilever seat contacts the adjustable nut and provides support for the cylinder of the pulp mill.

[0009] In a preferred embodiment, at least one stirring device is provided on the pulp mill. The structure of the stirring device is as follows: the pulp mill shaft is located inside the cylinder of the pulp mill, the top of the pulp mill shaft is connected to the driving device, the bottom of the pulp mill shaft is connected to the pulp making blade, a draft tube is provided outside the periphery of the pulp making blade, and both the upper end and the lower end of the draft tube are open structures.

[0010] In a preferred embodiment, the pulp making blade is a double-layer blade;

[0011] The draft tube is formed by welding two sections of cylinders through a plurality of rib plates arranged along the circumference. There is a gap between the two sections of cylinders, the height of the lower section cylinder is higher than that of the upper section cylinder, and the pulp making blade is located inside the lower section cylinder.

[0012] In a preferred embodiment, the structure of the cement feed inlet is as follows: a hopper is fixed on the top of the pulp mill cylinder, a vibrator is provided on the side wall of the hopper, a chute is provided at the bottom of the hopper, and a conical bulk material cone is provided in the chute with the tip of the cone facing upward.

[0013] In a preferred embodiment, there are two stirring devices, the cylinder of the pulp mill is oblate, the two stirring devices are located at positions near both ends of the cylinder of the pulp mill, and the rotation directions of the two stirring devices are opposite.

[0014] In a preferred embodiment, the bottom of the cylinder of the pulp mill is inverted conical, the discharge valve is located at the lowest position of the inverted cone, the discharge valve is a pneumatic or electrically controlled valve, and the outlet of the discharge valve is located at the top of the mixer.

[0015] In a preferred embodiment, a quick-opening discharge door is further provided on the side wall of the pulp mill for quickly discharging the cement slurry.

[0016] In a preferred embodiment, the mixer is fixed inside the lower frame, and the lower frame and the upper frame are fixedly connected in a manner that can be quickly disassembled;

[0017] A stirring mechanism is provided inside the mixer. The top of the stirring shaft of the stirring mechanism is connected to the stirring motor through a speed reducer, and the bottom of the stirring shaft is provided with stirring blades;

[0018] A quick-opening discharge door for the mixer is provided on the side wall of the mixer for quickly discharging the cement slurry.

[0019] In a preferred embodiment, a non-contact liquid level gauge is provided at the top of the mixer, and the non-contact liquid level gauge is a laser liquid level gauge or a sonar liquid level gauge.

[0020] A cement slurry preparation, mixing and transportation integrated system provided by the present invention stacks a pulping machine above a mixer by adopting a modular frame stacking structure, and enables the input cement and water to be accurately weighed, thereby ensuring the accuracy of the water-cement ratio. The solution of the present invention can quickly connect water, electricity and gas pipelines on site, and can be quickly put into production. Moreover, all production can adopt an automated mode, and is controlled by a PLC program. It can automatically weigh clear water and dry powder materials according to the water-cement ratio of the cement slurry, stir at a high speed regularly, automatically store and stir the slurry, and can be remotely transported by a self-provided delivery pump. The system of the present invention is convenient for on-site installation and disassembly, has high pulping precision, fast speed, requires few operating personnel, and only requires one operator at least. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the drawings and embodiments:

[0022] Figure 1 It is a front view schematic diagram of the present invention.

[0023] Figure 2 It is a side view schematic diagram of the present invention.

[0024] Figure 3 It is a top view schematic diagram of the present invention.

[0025] Figure 4 It is a structural schematic diagram of a single stirring device of the pulping machine of the present invention.

[0026] Figure 5 It is a structural schematic diagram of two stirring devices of the pulping machine of the present invention.

[0027] In the figure: pulping machine 1, slurry discharge valve 2, filter screen 3, mixer 4, upper frame 5, reducer 6, quick-opening door for slurry discharge of mixer 7, electric control cabinet 8, non-contact liquid level gauge 9, lower frame 10, slurry outlet pipeline 11, manual valve 12, delivery pump 13, quick-opening door for slurry discharge 14, auxiliary support structure 15, weighing sensor 16, guide wheel 17, pulping transmission mechanism 18, pulping machine shaft 19, first pulping blade 191, second pulping blade 192, draft tube 20, cement inlet 21, bulk material cone 211, vibrator 22, chute 23, water inlet 24, automatic water inlet valve 25, water inlet pipeline 26, quick connector 27, pneumatic pipeline 28, pulping motor 29, slide rail 30, stirring motor 31, liquid inlet 32. DETAILED DESCRIPTION OF THE INVENTION

[0028] Example 1:

[0029] As Figures 1 - 3In a cement slurry preparation, mixing and transportation integrated system, it includes a slurry preparation machine 1 and a mixer 4. The slurry preparation machine 1 is located above the mixer 4, and the slurry outlet pipeline 11 of the mixer 4 is connected to the inlet of the transfer pump 13. Preferably, a manual valve 12 or an electrically controlled valve is also provided on the slurry outlet pipeline 11.

[0030] The slurry preparation machine 1 is supported on the upper frame 5 through a plurality of weighing sensors 16. At the top of the slurry preparation machine 1, there is a water inlet pipeline 26, and an automatic water inlet valve 25 is provided on the water inlet pipeline 26. The water inlet pipeline 26 is movably connected to the liquid inlet 32 at the top of the cylinder body of the slurry preparation machine 1.

[0031] At the top of the slurry preparation machine 1, there is also a cement feed port 21. With this structure, the automatic preparation of cement slurry is realized. The cement and water are weighed through the weighing sensors 16, so as to obtain an accurate water-cement ratio.

[0032] The preferred solution is as Figure 1 In, a plurality of auxiliary support structures 15 are also provided on the outer wall of the cylinder body of the slurry preparation machine 1. The structure of the auxiliary support structure 15 is: there is a cantilever seat on the outer wall of the cylinder body of the slurry preparation machine 1, and a through hole is provided on the cantilever seat. The bolt is vertically fixed on the upper frame 5, and the through hole is sleeved with the bolt. An adjustable nut is provided below the through hole on the bolt. The position of the adjustable nut is set at the maximum value of the measuring range of the weighing sensor 16, that is, when the weighing sensor 16 is subjected to the maximum value of the measuring range, the cantilever seat contacts the adjustable nut and provides support for the cylinder body of the slurry preparation machine 1. With this structure, it is avoided that the weight of the cement and water exceeds the measuring range of the weighing sensor 16 and damages the weighing sensor 16. At the same time, during transportation, the position of the adjustable nut is adjusted upward to raise the cylinder body of the slurry preparation machine 1 and avoid damage to the sensor 16 caused by external force impact.

[0033] The preferred solution is as Figure 4 In, at least one stirring device is provided on the slurry preparation machine 1. The structure of the stirring device is: the slurry preparation machine shaft 19 is located inside the cylinder body of the slurry preparation machine 1. The top of the slurry preparation machine shaft 19 is connected to the driving device, and the bottom of the slurry preparation machine shaft 19 is connected to the slurry preparation blades. A draft tube 20 is provided outside the periphery of the slurry preparation blades. The upper and lower ends of the draft tube 20 are both open structures. With this structure, the cement slurry is fully mixed within a relatively narrow range, and more cement slurry continuously enters the draft tube 20 through circulation for further mixing, so that the mixing speed of the cement slurry is higher.

[0034] The preferred solution is as Figure 2 、 5 In, the slurry preparation blades are double-layer blades; with this structure, the cement slurry is further accelerated under the action of the double-layer blades.

[0035] The draft tube 20 is formed by welding two sections of cylinders through a plurality of rib plates arranged circumferentially. There is a gap between the two sections of cylinders. The height of the lower cylinder is higher than that of the upper cylinder, and the pulping blades are located inside the lower cylinder. With this structure, it is conducive to forming a composite cycle as shown in Figure 4 , further improving the pulping efficiency.

[0036] In a preferred solution, as shown in Figure 2 , the structure of the cement feed inlet 21 is as follows: the hopper is fixedly arranged at the top of the cylinder of the pulping machine 1, the side wall of the hopper is provided with a vibrator 22, and the provided vibrator 22 is a pneumatic or electric vibrator to prevent cement from accumulating in the hopper. The bottom of the hopper is provided with a chute 23, and a conical material spreading cone 211 is arranged in the chute 23, with the tip of the material spreading cone 211 facing upwards. The material spreading cone 211 can prevent the cement from falling in a lump and being difficult to disperse.

[0037] In a preferred solution, as shown in Figure 2 , there are two stirring devices. The cylinder of the pulping machine 1 is oblate, and the two stirring devices are located at positions near both ends of the cylinder of the pulping machine 1, and the rotation directions of the two stirring devices are opposite. With this structure, a vortex-like turbulent flow is formed, which is also conducive to the mixing of the cement slurry.

[0038] In a preferred solution, as shown in Figure 1 、 2 , the bottom of the cylinder of the pulping machine 1 is inverted conical, and the discharge valve 2 is located at the lowest position of the inverted cone. The discharge valve 2 is a pneumatic or electrically controlled valve, and the outlet of the discharge valve 2 is located at the top of the mixer 4.

[0039] In a preferred solution, as shown in Figure 1 、 3 , a quick-opening discharge door 14 is also provided on the side wall of the pulping machine 1 for quickly discharging the cement slurry. The specific structure of the quick-opening discharge door 14 is as described in the Chinese patent document 201921412067.0.

[0040] In a preferred solution, as shown in Figure 1 , the mixer 4 is fixedly arranged in the lower frame 10, and the lower frame 10 and the upper frame are fixedly connected in a quickly detachable manner; with this structure, it is convenient for quick layout.

[0041] A stirring mechanism is arranged in the mixer 4. The top of the stirring shaft of the stirring mechanism is connected to the stirring motor 31 through a speed reducer 6, and stirring blades are arranged at the bottom of the stirring shaft;

[0042] As shown in Figure 3 , a quick-opening discharge door 7 for the mixer is provided on the side wall of the mixer 4 for quickly discharging the cement slurry.

[0043] In a preferred solution, as shown in Figure 1In it, a non-contact liquid level gauge 9 is provided at the top of the mixer 4, and the non-contact liquid level gauge 9 is a laser liquid level gauge or a sonar liquid level gauge. With this structure, it can feedback how much cement slurry is stored in the mixer 4, so as to facilitate arranging the slurry making machine 1 to continue production.

[0044] During use, first connect water, electricity and gas. The water supply pipe is connected to the water inlet pipeline 26 through the quick connector 27, and the compressed air pipeline is connected to the pneumatic pipeline 28 through the quick connector.

[0045] The operator inputs the water-cement ratio and the slurry making amount per hour on the touch screen of the electric control cabinet 8, and the PLC automatically calculates the mass of clear water and the mass of cement powder input into the high-speed slurry making machine 1. The mass of clear water and the mass of cement powder of the high-speed slurry making machine 1 are controlled by the weighing sensor group 16 on the high-speed slurry making machine 1. After the data input is completed. The operator presses the one-key slurry making and conveying function switch to realize the automatic slurry making process cycle, the function of storing cement slurry in the mixer, and the automatic external conveying function.

[0046] The pneumatically controlled automatic water inlet valve 25 is opened, and water enters the cylinder body of the slurry making machine 1. The weighing sensor 16 weighs. Since the water inlet 24 and the liquid inlet 32 are movably sleeved, the water inlet 24 will not affect the weighing accuracy. In a preferred solution, a plurality of vertical slide rails 30 are further provided on the outer wall of the cylinder body, and corresponding guide wheels 17 are also provided on the upper frame 5. The guide wheels 17 slide along the slide rails 30, thereby further ensuring the weighing accuracy. The weighing sensor 16 feeds back the weighing result to the PLC controller in the electric control cabinet 8. When the preset value is reached, the automatic water inlet valve 25 is closed. The valve of the cement storage bin is opened, and the cement is conveyed to the cement feed inlet 21. At the same time, the vibrator 22 is started. After the cement is dispersed by the bulk material cone 211, it falls into the cylinder body of the slurry making machine 1 from the chute 23. The slurry making motor 29 is started, and the slurry making motor 29 drives the slurry making machine shaft 19 to rotate through the slurry making transmission mechanism 18. In this example, the slurry making transmission mechanism 18 preferably adopts a belt mechanism. The first slurry making blade 191 and the second slurry making blade 192 rotate in the guide cylinder 20 at a speed of 500-1500 revolutions per minute, forming as Figure 4 、 5The circulation of cement slurry. After the cement feed reaches the weight parameter, the cement feed is stopped and the vibrator 22 is turned off. After the preset time for pulp making is reached, the PLC controls the pulp making motor 29 to stop. The PLC controls the opening of the pulp discharge valve 2 controlled by compressed air, and the cement slurry enters the mixer 4 through the filter screen 3. The weighing sensor 16 feeds back according to the weight parameter. After the cement slurry is emptied, the pulp discharge valve 2 is closed and the pulp making process is started again. The mixing motor 31 is started. After being decelerated by the reducer 6, it drives the mixing mechanism in the mixer 4 to rotate at a speed of 10 to 200 revolutions per minute. When pulp supply is required, the PLC controls the start of the automatic external conveying function. When the non-contact liquid level gauge 9 at the top of the mixer 4 detects that the cement slurry reaches the set liquid level, the conveying pump 13 automatically starts to convey the cement slurry outwards. When the non-contact liquid level gauge 9 detects a low liquid level, the conveying pump 13 stops conveying the cement slurry outwards. Wait for the pulp making machine 1 to replenish new slurry. When any accident occurs in the present invention, the operator presses the one-key pause pulp making function switch, and all the power components of this equipment pause working, and all pneumatic valves are in the closed state. After troubleshooting, press the one-key pause pulp making function switch again, and this equipment continues to work. At the end of each shift of this equipment, the operator presses the one-key cleaning function switch, and the PLC controls this equipment to execute the process of adding clean water, the pulp making process, the pulp discharge process, the mixer 4 runs continuously, and the conveying pump 13 is manually turned on for cleaning function. For the said manual operation function, all the motors and pneumatic valves of this equipment can be operated through manual buttons. If the demand for cement slurry is large, or continuous conveying needs to be ensured, the equipment of the present invention can be conveniently arrayed according to the demand to supply cement slurry to the construction site.

[0047] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. On the premise of non-conflict, the various technical features recorded in the present invention can be combined with each other. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A slurry preparation, mixing and conveying integrated system for cement slurry, comprising a slurry preparation machine (1) and a mixer (4). The slurry preparation machine (1) is located above the mixer (4), and the slurry outlet pipeline (11) of the mixer (4) is connected to the inlet of a delivery pump (13). The slurry preparation machine (1) is supported on an upper frame (5) by a plurality of weighing sensors (16). At the top of the slurry preparation machine (1), there is a water inlet pipeline (26) provided with an automatic water inlet valve (25). The water inlet pipeline (26) is movably connected to the liquid inlet (32) at the top of the cylinder body of the slurry preparation machine (1). At the top of the slurry preparation machine (1), there is also a cement feed inlet (21). On the outer wall of the cylinder body of the slurry preparation machine (1), there are also a plurality of auxiliary support structures (15). The structure of the auxiliary support structure (15) is as follows: there is a cantilever seat on the outer wall of the cylinder body of the slurry preparation machine (1), and there is a through hole on the cantilever seat. A bolt is vertically fixed on the upper frame (5), and the through hole is sleeved with the bolt. An adjustable nut is provided below the through hole on the bolt, and the position of the adjustable nut is set at the maximum value of the measuring range of the weighing sensor (16), that is, when the weighing sensor (16) receives the maximum value of the measuring range, the cantilever seat contacts the adjustable nut and provides support for the cylinder body of the slurry preparation machine (1). Two stirring devices are provided on the slurry preparation machine (1). The structure of the stirring device is as follows: a slurry preparation machine shaft (19) is located inside the cylinder body of the slurry preparation machine (1). The top of the slurry preparation machine shaft (19) is connected to a driving device, and the bottom of the slurry preparation machine shaft (19) is connected to slurry preparation blades. A guide cylinder (20) is provided on the periphery of the slurry preparation blades. The upper and lower ends of the guide cylinder (20) are both open structures. The cylinder body of the slurry preparation machine (1) is oblate. The two stirring devices are located at positions near both ends of the cylinder body of the slurry preparation machine (1), and the rotation directions of the two stirring devices are opposite. The mixer (4) is fixedly arranged inside a lower frame (10), and the lower frame (10) is fixedly connected to the upper frame in a manner that can be quickly disassembled. A stirring mechanism is provided inside the mixer (4). The top of the stirring shaft of the stirring mechanism is connected to a stirring motor (31) through a speed reducer (6), and stirring blades are provided at the bottom of the stirring shaft. A quick-opening slurry discharge door (7) is provided on the side wall of the mixer (4) for quickly discharging the cement slurry.

2. A slurry preparation, mixing and conveying integrated system for cement slurry according to claim 1, characterized in that: the slurry preparation blades are double-layer blades; the guide cylinder (20) is formed by welding two cylinder bodies through a plurality of rib plates arranged along the circumference. There is a gap between the two cylinder bodies, and the height of the lower cylinder body is higher than that of the upper cylinder body. The slurry preparation blades are located inside the lower cylinder body.

3. A slurry preparation, mixing and conveying integrated system for cement slurry according to claim 1, characterized in that: the structure of the cement feed inlet (21) is as follows: a hopper is fixedly arranged on the top of the cylinder body of the slurry preparation machine (1). A vibrator (22) is provided on the side wall of the hopper, and a chute (23) is provided at the bottom of the hopper. A conical bulk material cone (211) is provided inside the chute (23), and the tip of the bulk material cone (211) faces upward.

4. A slurry preparation, mixing and conveying integrated system for cement slurry according to claim 1, characterized in that: The bottom of the cylinder body of the pulper (1) is in an inverted conical shape, and the pulp discharging valve (2) is located at the lowest position of the inverted cone. The pulp discharging valve (2) is a pneumatic or electrically controlled valve, and the outlet of the pulp discharging valve (2) is located at the top of the mixer (4).

5. A cement slurry pulping, mixing and conveying integrated system according to claim 1, characterized in that: A quick-opening pulp discharging door (14) is further provided on the side wall of the pulper (1) for quickly discharging the cement slurry.

6. A cement slurry pulping, mixing and conveying integrated system according to claim 1, characterized in that: A non-contact liquid level gauge (9) is provided on the top of the mixer (4), and the non-contact liquid level gauge (9) is a laser liquid level gauge or a sonar liquid level gauge.

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