Device for measuring density of slurry

Abstract

The utility model relates to a device for measuring pulp density, which belongs to the technical field of pulping equipment and comprises an outer barrel, a bottom plate is arranged at the lower end of the outer barrel, an inner barrel is arranged in the outer barrel, a pulp inlet pipe extending to the inner barrel is arranged on one side of the upper end of the outer barrel, and a blow-off pipe is arranged on the outer side of the outer barrel. The lower end of the inner barrel is provided with a slurry discharge pipe which penetrates through the outer barrel and is communicated with the blow-off pipe, the slurry discharge pipe is provided with a slurry discharge valve which is in threaded sleeve connection with the slurry discharge pipe, a laser distance measuring sensor which is fixed with the outer barrel through a screw is arranged above the inner barrel, and a weighing sensor is arranged between the lower part of the inner barrel and the bottom plate; and a support is arranged between the weighing sensor and the inner barrel. The device has the characteristics of compact structure, convenience in operation, time saving, labor saving and good running stability. The weighing sensor is used for measuring the slurry mass, the laser range finder is used for measuring the liquid level, then the slurry volume is calculated, then the slurry density is calculated, and the whole process is automatically controlled and achieved according to a program without manual intervention.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping equipment, in particular to a device for measuring slurry density. Background Art

[0002] At present, the slurry density is measured by manual sampling, which is done by weighing and reading the slurry volume, and then calculating the slurry density according to the density definition. Existing measurements require electronic scales, measuring cups, sampling bottles, glass rods, etc. First, peel the electronic scale, subtract the weight of the measuring cup, then use the sampling bottle to take out the slurry, and then transfer the slurry to the measuring cup. During the process, it is necessary to constantly stir with a glass cup to prevent the slurry from settling. After the transfer is completed, read the slurry volume, then place the measuring cup containing the slurry on the electronic scale, read the electronic scale indication, and then divide the mass by the volume to obtain the slurry density. After completion, clean the measuring cup, sampling bottle, glass cup and other instruments for the next measurement. According to the measurement results, manually adjust the formula in the pulping program, or add water to the slurry pool to make the slurry in the slurry pool reach the target density.

[0003] The prior art has the following defects:

[0004] 1. The existing technology requires human operation, and when the monitoring frequency is high, the labor intensity is high. It is costly to achieve density monitoring at shorter time intervals by manpower, and multiple people and multiple instruments are required to perform alternating sampling, measurement and calculation.

[0005] 2. When people are taking samples, the slurry may not be completely poured into the measuring cup, and precipitation or particles may occur. At this time, there will be errors in the calculated density.

[0006] 3. The pulping formula cannot be adjusted in time, and complex calculations are required. In actual production, it is often modified based on experience, and it is difficult to ensure the slurry density. Summary of the invention

[0007] The utility model mainly solves the deficiencies in the prior art and provides a device for measuring slurry density, which has the characteristics of compact structure, convenient operation, time-saving and labor-saving, and good operation stability. The slurry mass is measured by a weighing sensor, the liquid level is measured by a laser rangefinder, and then the slurry volume is calculated, and then the slurry density is calculated. The whole process is realized by automatic control according to the program without manual intervention.

[0008] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0009] A device for measuring slurry density comprises an outer barrel, wherein a bottom plate is provided at the lower end of the outer barrel, an inner barrel is provided inside the outer barrel, a slurry inlet pipe extending to the inner barrel is provided on one side of the upper end of the outer barrel, a sewage pipe is provided on the outer side of the outer barrel, a slurry discharge pipe penetrating the outer barrel and connected with the sewage pipe is provided at the lower end of the inner barrel, a slurry discharge pipe threadedly connected to the slurry discharge pipe is provided on the slurry discharge pipe, a laser ranging sensor fixed to the outer barrel by screws is provided above the inner barrel, a weighing sensor is provided between the lower part of the inner barrel and the bottom plate, and a support is provided between the weighing sensor and the inner barrel.

[0010] Preferably, a flushing pipe connected to the upper end of the inner barrel is provided on the other side of the upper end of the outer barrel, and a flushing valve threadedly connected to the flushing pipe is provided on the flushing pipe.

[0011] Preferably, support frames are provided between the flushing pipe and the outer barrel, and between the slurry inlet pipe and the outer barrel.

[0012] Preferably, the slurry inlet pipe is provided with a slurry inlet valve which is threadedly sleeved with the slurry inlet pipe.

[0013] Preferably, an overflow pipe is provided on the upper portion of the inner barrel, which passes through the outer barrel and is connected to the sewage pipe.

[0014] Preferably, an observation window is provided at the lower portion of the outer barrel.

[0015] Preferably, a plurality of feet are provided at the lower end of the base plate.

[0016] The utility model can achieve the following effects:

[0017] The utility model provides a device for measuring slurry density, which has the characteristics of compact structure, convenient operation, time-saving and labor-saving, and good operation stability compared with the prior art. The slurry mass is measured by a weighing sensor, the liquid level is measured by a laser rangefinder, and then the slurry volume is calculated, and then the slurry density is calculated. The whole process is realized by automatic control according to the program without manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the utility model.

[0019] Figure 2 It is a side structural sectional view of the utility model.

[0020] In the figure: flushing pipe 1, flushing valve 2, support frame 3, inner barrel 4, slurry inlet valve 5, slurry inlet pipe 6, outer barrel 7, observation window 8, foot 9, bottom plate 10, laser ranging sensor 11, overflow pipe 12, sewage pipe 13, slurry discharge pipe 14, slurry discharge valve 15, support 16, weighing sensor 17. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0022] Example: Figure 1 and Figure 2 As shown, a device for measuring slurry density includes an outer barrel 7, a bottom plate 10 is provided at the lower end of the outer barrel 7, and a plurality of feet 9 are provided at the lower end of the bottom plate 10. An inner barrel 4 is provided inside the outer barrel 7, a slurry inlet pipe 6 extending to the inner barrel 4 is provided on one side of the upper end of the outer barrel 7, and a slurry inlet valve 5 threadedly sleeved with the slurry inlet pipe 6 is provided on the slurry inlet pipe 6. A flushing pipe 1 connected to the upper end of the inner barrel 4 is provided on the other side of the upper end of the outer barrel 7, and a flushing valve 2 threadedly sleeved with the flushing pipe 1 is provided on the flushing pipe 1. A support frame 3 is provided between the flushing pipe 1 and the outer barrel 7, and between the slurry inlet pipe 6 and the outer barrel 7. A sewage pipe 13 is provided on the outer side of the outer barrel 7, a slurry discharge pipe 14 penetrating the outer barrel 7 and communicating with the sewage discharge pipe 13 is provided at the lower end of the inner barrel 4, a slurry discharge valve 15 threadedly sleeved with the slurry discharge pipe 14 is provided on the slurry discharge pipe 14, and an overflow pipe 12 penetrating the outer barrel 7 and communicating with the sewage discharge pipe 13 is provided on the upper part of the inner barrel 4. A laser distance sensor 11 is provided above the inner barrel 4 and is fixed to the outer barrel 7 by screws. A weighing sensor 17 is provided between the inner barrel 4 and the bottom plate 10. A support 16 is provided between the weighing sensor 17 and the inner barrel 4. An observation window 8 is provided at the lower part of the outer barrel 7.

[0023] The slurry is directly pumped into the measuring barrel 4, and the sampling is direct without the need to change the equipment to cause precipitation or particles to hang on the wall, so the measurement result is more accurate. When calculating the slurry density ρ, the mass difference and volume difference are used, ρ=Δm / V=(m2-m1) / [π*(D / 2) 2 *Δh], the weighing sensor measures the mass of the slurry Δm, the laser rangefinder measures the liquid level Δh, the total mass of the inner barrel 4 and the slurry is m2, and the total mass of the inner barrel 4 is m 1， The diameter of the inner barrel 4 is D, which avoids the error in measuring the slurry volume caused by the irregular bottom of the container. After the measurement is completed, the flushing valve 2 is opened to automatically flush through the flushing pipe 1, and the slurry is flushed again before the measurement, which eliminates the factors that the residual water droplets in the inner barrel 4 caused by flushing affect the slurry density and the unevenness of the slurry initially pumped by the slurry pump, and the measurement result is more accurate.

[0024] In summary, the device for measuring slurry density has the characteristics of compact structure, convenient operation, time-saving and labor-saving, and good operation stability. The slurry mass is measured by a weighing sensor, the liquid level is measured by a laser rangefinder, and then the slurry volume is calculated, and then the slurry density is calculated. The whole process is automatically controlled according to the program without manual intervention.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0026] In summary, the above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A device for measuring slurry density, characterized in that: The invention comprises an outer barrel (7), wherein a bottom plate (10) is provided at the lower end of the outer barrel (7), an inner barrel (4) is provided inside the outer barrel (7), a slurry inlet pipe (6) extending to the inner barrel (4) is provided at one side of the upper end of the outer barrel (7), a sewage discharge pipe (13) is provided at the outer side of the outer barrel (7), a slurry discharge pipe (14) penetrating the outer barrel (7) and connected to the sewage discharge pipe (13) is provided at the lower end of the inner barrel (4), a slurry discharge valve (15) threadedly sleeved with the slurry discharge pipe (14) is provided on the slurry discharge pipe (14), a laser distance measuring sensor (11) fixed to the outer barrel (7) by screws is provided above the inner barrel (4), a weighing sensor (17) is provided between the lower part of the inner barrel (4) and the bottom plate (10), and a support (16) is provided between the weighing sensor (17) and the inner barrel (4).

2. The device for measuring slurry density according to claim 1, characterized in that: A flushing pipe (1) connected to the upper end of the inner barrel (4) is provided on the other side of the upper end of the outer barrel (7), and the flushing pipe (1) is provided with a flushing valve (2) threadedly sleeved with the flushing pipe (1).

3. The device for measuring slurry density according to claim 2, characterized in that: Support frames (3) are provided between the flushing pipe (1) and the outer barrel (7), and between the slurry inlet pipe (6) and the outer barrel (7).

4. The device for measuring slurry density according to claim 1, characterized in that: The slurry inlet pipe (6) is provided with a slurry inlet valve (5) which is threadedly sleeved with the slurry inlet pipe (6).

5. The device for measuring slurry density according to claim 1, characterized in that: The upper portion of the inner barrel (4) is provided with an overflow pipe (12) which passes through the outer barrel (7) and is connected to the sewage discharge pipe (13).

6. The device for measuring slurry density according to claim 1, characterized in that: An observation window (8) is provided at the lower portion of the outer barrel (7).

7. The device for measuring slurry density according to claim 1, characterized in that: A plurality of footings (9) are provided at the lower end of the bottom plate (10).

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